/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:25:52,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:25:52,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:25:52,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 00:25:52,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-06 00:25:52,764 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:25:52,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:25:52,765 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:25:52,765 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:25:52,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:25:52,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:25:52,766 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:25:52,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:25:52,766 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:25:52,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:25:52,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:25:52,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:25:52,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:25:52,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:25:52,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:25:52,766 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:25:52,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:25:52,767 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:25:52,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:25:52,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:25:52,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:25:52,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:25:52,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:25:52,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:25:52,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:25:52,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:25:52,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:25:52,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:25:52,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:25:52,768 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:25:52,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:25:52,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:25:53,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:25:53,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:25:53,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:25:53,036 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:25:53,037 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:25:53,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl [2021-06-06 00:25:53,038 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl' [2021-06-06 00:25:53,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:25:53,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:25:53,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:25:53,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:25:53,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:25:53,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:25:53" (1/1) ... [2021-06-06 00:25:53,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:25:53" (1/1) ... [2021-06-06 00:25:53,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:25:53,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:25:53,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:25:53,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:25:53,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:25:53" (1/1) ... [2021-06-06 00:25:53,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:25:53" (1/1) ... [2021-06-06 00:25:53,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:25:53" (1/1) ... [2021-06-06 00:25:53,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:25:53" (1/1) ... [2021-06-06 00:25:53,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:25:53" (1/1) ... [2021-06-06 00:25:53,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:25:53" (1/1) ... [2021-06-06 00:25:53,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:25:53" (1/1) ... [2021-06-06 00:25:53,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:25:53,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:25:53,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:25:53,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:25:53,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:25:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:25:53,157 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:25:53,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:25:53,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:25:53,158 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:25:53,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:25:53,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:25:53,158 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:25:53,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:25:53,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:25:53,159 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-06 00:25:53,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-06 00:25:53,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-06 00:25:53,160 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 00:25:53,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:25:53,306 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 00:25:53,307 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:25:53 BoogieIcfgContainer [2021-06-06 00:25:53,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:25:53,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:25:53,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:25:53,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:25:53,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:25:53" (1/2) ... [2021-06-06 00:25:53,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dba919 and model type sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:25:53, skipping insertion in model container [2021-06-06 00:25:53,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:25:53" (2/2) ... [2021-06-06 00:25:53,312 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-array-hom.wvr.bpl [2021-06-06 00:25:53,315 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:25:53,315 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:25:53,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:25:53,316 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:25:53,339 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-06 00:25:53,353 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-06 00:25:53,375 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:25:53,375 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:25:53,375 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:25:53,375 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:25:53,375 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:25:53,375 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:25:53,375 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:25:53,375 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:25:53,381 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-06 00:25:53,395 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:53,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-06 00:25:53,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:53,403 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:53,403 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:53,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:53,407 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-06-06 00:25:53,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:53,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537706626] [2021-06-06 00:25:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:53,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:53,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537706626] [2021-06-06 00:25:53,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537706626] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:25:53,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:25:53,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:25:53,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736968798] [2021-06-06 00:25:53,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:25:53,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:53,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:25:53,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:25:53,567 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:53,621 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-06-06 00:25:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:25:53,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-06 00:25:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:53,629 INFO L225 Difference]: With dead ends: 154 [2021-06-06 00:25:53,629 INFO L226 Difference]: Without dead ends: 154 [2021-06-06 00:25:53,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:25:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-06 00:25:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-06-06 00:25:53,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-06 00:25:53,674 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-06-06 00:25:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:53,674 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-06 00:25:53,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-06 00:25:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-06 00:25:53,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:53,676 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:53,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:25:53,677 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:53,677 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-06-06 00:25:53,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:53,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245314846] [2021-06-06 00:25:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:25:53,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:53,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245314846] [2021-06-06 00:25:53,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245314846] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:25:53,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:25:53,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:25:53,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964803971] [2021-06-06 00:25:53,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:25:53,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:53,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:25:53,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:25:53,713 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:53,739 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-06-06 00:25:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 00:25:53,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-06 00:25:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:53,741 INFO L225 Difference]: With dead ends: 158 [2021-06-06 00:25:53,741 INFO L226 Difference]: Without dead ends: 158 [2021-06-06 00:25:53,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:25:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-06 00:25:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-06-06 00:25:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-06 00:25:53,752 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-06 00:25:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:53,752 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-06 00:25:53,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-06 00:25:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:25:53,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:53,753 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:53,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-06 00:25:53,754 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:53,754 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-06-06 00:25:53,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:53,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274595545] [2021-06-06 00:25:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:54,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:54,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274595545] [2021-06-06 00:25:54,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274595545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:54,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212391595] [2021-06-06 00:25:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:54,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:25:54,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:54,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:25:54,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:25:54,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:54,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:54,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:54,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-06 00:25:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:54,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212391595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:54,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:54,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:25:54,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808754826] [2021-06-06 00:25:54,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:25:54,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:54,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:25:54,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:25:54,368 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:54,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:54,545 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-06 00:25:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:25:54,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:25:54,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:54,548 INFO L225 Difference]: With dead ends: 330 [2021-06-06 00:25:54,548 INFO L226 Difference]: Without dead ends: 315 [2021-06-06 00:25:54,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:25:54,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-06 00:25:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-06 00:25:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-06 00:25:54,558 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-06 00:25:54,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:54,558 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-06 00:25:54,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:54,559 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-06 00:25:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:25:54,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:54,560 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:54,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-06 00:25:54,773 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:54,774 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-06-06 00:25:54,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:54,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279789401] [2021-06-06 00:25:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:54,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:54,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279789401] [2021-06-06 00:25:54,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279789401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:54,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426955981] [2021-06-06 00:25:54,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:54,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:25:55,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:55,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:25:55,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:55,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:55,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-06 00:25:55,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:25:55,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:55,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:55,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-06-06 00:25:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:55,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426955981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:55,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:55,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-06 00:25:55,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738947889] [2021-06-06 00:25:55,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:25:55,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:55,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:25:55,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:25:55,213 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:55,570 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-06 00:25:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:25:55,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:25:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:55,572 INFO L225 Difference]: With dead ends: 374 [2021-06-06 00:25:55,572 INFO L226 Difference]: Without dead ends: 359 [2021-06-06 00:25:55,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:25:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-06 00:25:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-06 00:25:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-06 00:25:55,581 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-06 00:25:55,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:55,581 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-06 00:25:55,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-06 00:25:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:25:55,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:55,582 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:55,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:55,801 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:55,801 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-06-06 00:25:55,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:55,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360569717] [2021-06-06 00:25:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:55,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:55,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360569717] [2021-06-06 00:25:55,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360569717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:55,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031661009] [2021-06-06 00:25:55,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:25:55,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:25:55,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:55,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:55,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:56,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:25:56,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:56,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:56,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:56,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-06 00:25:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:56,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031661009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:56,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:56,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:25:56,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135768028] [2021-06-06 00:25:56,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:25:56,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:56,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:25:56,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:25:56,105 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:56,227 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-06 00:25:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:25:56,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:25:56,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:56,232 INFO L225 Difference]: With dead ends: 296 [2021-06-06 00:25:56,232 INFO L226 Difference]: Without dead ends: 281 [2021-06-06 00:25:56,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:25:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-06 00:25:56,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-06 00:25:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-06 00:25:56,245 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-06 00:25:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:56,245 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-06 00:25:56,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-06 00:25:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:25:56,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:56,248 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:56,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:56,457 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:56,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-06-06 00:25:56,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:56,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466827530] [2021-06-06 00:25:56,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:56,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:56,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466827530] [2021-06-06 00:25:56,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466827530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:56,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520766774] [2021-06-06 00:25:56,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:56,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:25:56,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:56,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:25:56,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:56,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:56,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-06 00:25:56,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:25:56,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:56,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:56,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2021-06-06 00:25:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:56,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520766774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:56,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:56,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:25:56,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389692928] [2021-06-06 00:25:56,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:25:56,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:56,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:25:56,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:25:56,754 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:56,928 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-06 00:25:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:25:56,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:25:56,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:56,930 INFO L225 Difference]: With dead ends: 425 [2021-06-06 00:25:56,930 INFO L226 Difference]: Without dead ends: 410 [2021-06-06 00:25:56,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:25:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-06 00:25:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-06 00:25:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-06 00:25:56,937 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-06 00:25:56,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:56,937 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-06 00:25:56,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:56,937 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-06 00:25:56,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:25:56,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:56,938 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:57,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:57,153 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:57,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-06-06 00:25:57,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:57,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695494850] [2021-06-06 00:25:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:57,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:57,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695494850] [2021-06-06 00:25:57,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695494850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:57,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460136265] [2021-06-06 00:25:57,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:57,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:25:57,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:57,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:25:57,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:57,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460136265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:57,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:57,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:25:57,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146284885] [2021-06-06 00:25:57,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:25:57,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:57,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:25:57,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:25:57,313 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:57,666 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-06 00:25:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:25:57,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:25:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:57,668 INFO L225 Difference]: With dead ends: 619 [2021-06-06 00:25:57,668 INFO L226 Difference]: Without dead ends: 619 [2021-06-06 00:25:57,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:25:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-06 00:25:57,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-06 00:25:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-06 00:25:57,676 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-06 00:25:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:57,676 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-06 00:25:57,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-06 00:25:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:25:57,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:57,677 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:57,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-06 00:25:57,892 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-06-06 00:25:57,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:57,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820413990] [2021-06-06 00:25:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:57,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:57,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820413990] [2021-06-06 00:25:57,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820413990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:57,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223129581] [2021-06-06 00:25:57,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:57,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:25:57,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:57,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:25:57,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:58,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223129581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:58,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:58,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:25:58,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881402931] [2021-06-06 00:25:58,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:25:58,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:58,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:25:58,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:25:58,070 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:58,779 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-06 00:25:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:25:58,780 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:25:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:58,783 INFO L225 Difference]: With dead ends: 1078 [2021-06-06 00:25:58,783 INFO L226 Difference]: Without dead ends: 1078 [2021-06-06 00:25:58,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 425.3ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:25:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-06 00:25:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-06 00:25:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-06 00:25:58,794 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-06 00:25:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:58,794 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-06 00:25:58,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-06 00:25:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:25:58,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:58,797 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:59,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:59,005 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:59,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:59,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-06-06 00:25:59,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:59,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104148578] [2021-06-06 00:25:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:59,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:59,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104148578] [2021-06-06 00:25:59,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104148578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:59,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397760637] [2021-06-06 00:25:59,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:59,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:25:59,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:59,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397760637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:59,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:59,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:25:59,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525017657] [2021-06-06 00:25:59,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:25:59,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:59,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:25:59,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:25:59,137 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:59,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:59,761 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-06 00:25:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:25:59,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:25:59,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:59,765 INFO L225 Difference]: With dead ends: 951 [2021-06-06 00:25:59,765 INFO L226 Difference]: Without dead ends: 951 [2021-06-06 00:25:59,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 373.3ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:25:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-06 00:25:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-06 00:25:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-06 00:25:59,774 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-06 00:25:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:59,775 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-06 00:25:59,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:59,775 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-06 00:25:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:25:59,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:59,775 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:59,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:59,994 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:59,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:59,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-06-06 00:25:59,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:59,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886276292] [2021-06-06 00:25:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:00,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:00,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886276292] [2021-06-06 00:26:00,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886276292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:00,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763864829] [2021-06-06 00:26:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:00,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:26:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:00,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763864829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:00,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:00,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:26:00,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425605512] [2021-06-06 00:26:00,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:26:00,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:00,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:26:00,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:26:00,109 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:00,196 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-06 00:26:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:26:00,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:00,199 INFO L225 Difference]: With dead ends: 669 [2021-06-06 00:26:00,199 INFO L226 Difference]: Without dead ends: 663 [2021-06-06 00:26:00,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-06 00:26:00,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-06 00:26:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-06 00:26:00,208 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-06 00:26:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:00,208 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-06 00:26:00,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-06 00:26:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:00,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:00,209 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:00,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-06 00:26:00,421 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:00,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:00,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-06-06 00:26:00,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:00,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051582617] [2021-06-06 00:26:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:00,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:00,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051582617] [2021-06-06 00:26:00,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051582617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:00,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187040758] [2021-06-06 00:26:00,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:00,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:00,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:00,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:00,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:00,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187040758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:00,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:00,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-06 00:26:00,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676033162] [2021-06-06 00:26:00,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:00,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:00,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:00,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:00,558 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:00,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:00,692 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-06 00:26:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:26:00,693 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:00,695 INFO L225 Difference]: With dead ends: 710 [2021-06-06 00:26:00,695 INFO L226 Difference]: Without dead ends: 672 [2021-06-06 00:26:00,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:26:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-06 00:26:00,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-06 00:26:00,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:00,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-06 00:26:00,707 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-06 00:26:00,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:00,708 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-06 00:26:00,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-06 00:26:00,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:00,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:00,709 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:00,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-06 00:26:00,927 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:00,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:00,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-06-06 00:26:00,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:00,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935729459] [2021-06-06 00:26:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:00,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:00,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935729459] [2021-06-06 00:26:00,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935729459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:00,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521034258] [2021-06-06 00:26:00,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:00,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:00,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:00,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:26:00,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:01,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521034258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:01,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:01,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:26:01,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629872507] [2021-06-06 00:26:01,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:26:01,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:01,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:26:01,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:26:01,023 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:01,104 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-06 00:26:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:26:01,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:01,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:01,108 INFO L225 Difference]: With dead ends: 830 [2021-06-06 00:26:01,108 INFO L226 Difference]: Without dead ends: 830 [2021-06-06 00:26:01,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-06 00:26:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-06 00:26:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-06 00:26:01,119 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-06 00:26:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:01,119 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-06 00:26:01,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:01,119 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-06 00:26:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:01,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:01,120 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:01,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-06 00:26:01,335 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:01,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:01,335 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-06-06 00:26:01,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:01,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106909946] [2021-06-06 00:26:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:01,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:01,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106909946] [2021-06-06 00:26:01,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106909946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:01,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926112661] [2021-06-06 00:26:01,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:01,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:26:01,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:01,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:01,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:01,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926112661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:01,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:01,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:26:01,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484653661] [2021-06-06 00:26:01,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:26:01,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:01,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:26:01,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:26:01,486 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:01,746 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-06 00:26:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:26:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:01,750 INFO L225 Difference]: With dead ends: 1196 [2021-06-06 00:26:01,750 INFO L226 Difference]: Without dead ends: 1196 [2021-06-06 00:26:01,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:26:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-06 00:26:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-06 00:26:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-06 00:26:01,790 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-06 00:26:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:01,790 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-06 00:26:01,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-06 00:26:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:01,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:01,791 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:02,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-06 00:26:02,005 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-06-06 00:26:02,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:02,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479030331] [2021-06-06 00:26:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:02,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:02,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479030331] [2021-06-06 00:26:02,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479030331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:02,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405964547] [2021-06-06 00:26:02,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:02,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:02,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:02,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:02,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:02,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405964547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:02,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:02,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:26:02,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211390270] [2021-06-06 00:26:02,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:26:02,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:02,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:26:02,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:26:02,119 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:02,491 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-06 00:26:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:26:02,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:02,496 INFO L225 Difference]: With dead ends: 1492 [2021-06-06 00:26:02,496 INFO L226 Difference]: Without dead ends: 1492 [2021-06-06 00:26:02,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:26:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-06 00:26:02,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-06 00:26:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-06 00:26:02,512 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-06 00:26:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:02,512 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-06 00:26:02,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-06 00:26:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:02,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:02,513 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:02,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-06 00:26:02,729 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:02,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:02,729 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-06-06 00:26:02,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:02,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078824110] [2021-06-06 00:26:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:02,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:02,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078824110] [2021-06-06 00:26:02,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078824110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:02,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758917679] [2021-06-06 00:26:02,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:02,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:02,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:02,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:02,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:02,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758917679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:02,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:02,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-06 00:26:02,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634982871] [2021-06-06 00:26:02,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:02,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:02,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:02,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:02,873 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:03,097 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-06 00:26:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:26:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:03,101 INFO L225 Difference]: With dead ends: 1258 [2021-06-06 00:26:03,101 INFO L226 Difference]: Without dead ends: 1248 [2021-06-06 00:26:03,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:26:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-06 00:26:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-06 00:26:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-06 00:26:03,116 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-06 00:26:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:03,116 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-06 00:26:03,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-06 00:26:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:03,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:03,117 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:03,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:03,333 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:03,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:03,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-06-06 00:26:03,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:03,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24201677] [2021-06-06 00:26:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:03,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:03,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24201677] [2021-06-06 00:26:03,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24201677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:03,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105582669] [2021-06-06 00:26:03,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:03,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:26:03,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:03,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:03,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:03,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105582669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:03,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:03,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-06 00:26:03,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613894243] [2021-06-06 00:26:03,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:03,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:03,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:03,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:03,450 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:03,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:03,697 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-06 00:26:03,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:26:03,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:03,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:03,701 INFO L225 Difference]: With dead ends: 1329 [2021-06-06 00:26:03,701 INFO L226 Difference]: Without dead ends: 1329 [2021-06-06 00:26:03,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:26:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-06 00:26:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-06 00:26:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-06 00:26:03,715 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-06 00:26:03,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:03,715 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-06 00:26:03,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:03,716 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-06 00:26:03,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:03,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:03,717 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:03,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:03,933 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-06-06 00:26:03,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:03,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519416650] [2021-06-06 00:26:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:03,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:03,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519416650] [2021-06-06 00:26:03,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519416650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:03,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253459863] [2021-06-06 00:26:03,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:03,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:03,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:04,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253459863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:04,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:04,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:26:04,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028137419] [2021-06-06 00:26:04,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:26:04,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:04,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:26:04,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:26:04,034 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:04,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:04,306 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-06 00:26:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:26:04,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:04,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:04,313 INFO L225 Difference]: With dead ends: 1548 [2021-06-06 00:26:04,313 INFO L226 Difference]: Without dead ends: 1544 [2021-06-06 00:26:04,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:26:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-06 00:26:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-06 00:26:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-06 00:26:04,329 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-06 00:26:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:04,329 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-06 00:26:04,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-06 00:26:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:04,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:04,331 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:04,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-06 00:26:04,540 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:04,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-06-06 00:26:04,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:04,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780100467] [2021-06-06 00:26:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:04,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:04,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780100467] [2021-06-06 00:26:04,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780100467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:04,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893891259] [2021-06-06 00:26:04,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:04,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:04,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:04,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:04,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:04,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893891259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:04,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:04,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:26:04,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322408688] [2021-06-06 00:26:04,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:04,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:04,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:04,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:04,681 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:05,366 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-06 00:26:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:26:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:05,380 INFO L225 Difference]: With dead ends: 2734 [2021-06-06 00:26:05,380 INFO L226 Difference]: Without dead ends: 2734 [2021-06-06 00:26:05,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:26:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-06 00:26:05,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-06 00:26:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:05,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-06 00:26:05,409 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-06 00:26:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:05,409 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-06 00:26:05,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-06 00:26:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:05,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:05,411 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:05,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:05,625 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:05,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:05,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-06-06 00:26:05,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:05,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557281363] [2021-06-06 00:26:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:05,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:05,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557281363] [2021-06-06 00:26:05,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557281363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:05,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062685717] [2021-06-06 00:26:05,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:05,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:26:05,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:05,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:05,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:05,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062685717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:05,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:05,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:26:05,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624827564] [2021-06-06 00:26:05,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:05,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:05,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:05,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:05,763 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:06,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:06,389 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-06 00:26:06,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:26:06,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:06,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:06,395 INFO L225 Difference]: With dead ends: 2693 [2021-06-06 00:26:06,395 INFO L226 Difference]: Without dead ends: 2693 [2021-06-06 00:26:06,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:26:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-06 00:26:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-06 00:26:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-06 00:26:06,417 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-06 00:26:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:06,417 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-06 00:26:06,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:06,417 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-06 00:26:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:06,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:06,419 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:06,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-06 00:26:06,633 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-06-06 00:26:06,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:06,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634711376] [2021-06-06 00:26:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:06,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:06,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634711376] [2021-06-06 00:26:06,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634711376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:06,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161590678] [2021-06-06 00:26:06,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:06,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:06,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:06,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:06,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:06,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161590678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:06,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:06,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:26:06,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673394160] [2021-06-06 00:26:06,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:26:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:06,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:26:06,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:26:06,755 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:07,297 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-06 00:26:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:26:07,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:07,305 INFO L225 Difference]: With dead ends: 2677 [2021-06-06 00:26:07,305 INFO L226 Difference]: Without dead ends: 2677 [2021-06-06 00:26:07,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:26:07,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-06 00:26:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-06 00:26:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-06 00:26:07,329 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-06 00:26:07,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:07,329 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-06 00:26:07,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-06 00:26:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:07,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:07,331 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:07,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-06 00:26:07,547 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:07,547 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-06-06 00:26:07,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:07,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072235533] [2021-06-06 00:26:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:07,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:07,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072235533] [2021-06-06 00:26:07,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072235533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:07,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384614813] [2021-06-06 00:26:07,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:07,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:26:07,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:07,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:07,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:07,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384614813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:07,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:07,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:26:07,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786221737] [2021-06-06 00:26:07,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:26:07,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:07,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:26:07,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:26:07,687 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:08,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:08,183 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-06 00:26:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:26:08,183 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:08,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:08,188 INFO L225 Difference]: With dead ends: 2474 [2021-06-06 00:26:08,188 INFO L226 Difference]: Without dead ends: 2470 [2021-06-06 00:26:08,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:26:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-06 00:26:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-06 00:26:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-06 00:26:08,209 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-06 00:26:08,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:08,209 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-06 00:26:08,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:08,209 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-06 00:26:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:08,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:08,211 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:08,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-06 00:26:08,425 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:08,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:08,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-06-06 00:26:08,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:08,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856850489] [2021-06-06 00:26:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:08,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:08,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856850489] [2021-06-06 00:26:08,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856850489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:08,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32828188] [2021-06-06 00:26:08,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:08,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:26:08,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:08,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:08,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32828188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:08,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:08,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:26:08,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197577260] [2021-06-06 00:26:08,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:08,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:08,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:08,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:08,566 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:09,125 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-06 00:26:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:26:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:09,133 INFO L225 Difference]: With dead ends: 2514 [2021-06-06 00:26:09,133 INFO L226 Difference]: Without dead ends: 2514 [2021-06-06 00:26:09,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:26:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-06 00:26:09,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-06 00:26:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-06 00:26:09,155 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-06 00:26:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:09,155 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-06 00:26:09,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-06 00:26:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:09,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:09,157 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:09,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-06 00:26:09,374 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:09,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:09,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-06-06 00:26:09,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:09,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465124997] [2021-06-06 00:26:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:09,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:09,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465124997] [2021-06-06 00:26:09,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465124997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:09,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179998249] [2021-06-06 00:26:09,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:09,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:09,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:09,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179998249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:09,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:09,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:26:09,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127860202] [2021-06-06 00:26:09,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:09,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:09,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:09,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:09,499 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:10,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:10,023 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-06 00:26:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:26:10,023 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:10,028 INFO L225 Difference]: With dead ends: 2332 [2021-06-06 00:26:10,028 INFO L226 Difference]: Without dead ends: 2328 [2021-06-06 00:26:10,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:26:10,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-06 00:26:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-06 00:26:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-06 00:26:10,049 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-06 00:26:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:10,049 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-06 00:26:10,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-06 00:26:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:10,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:10,050 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:10,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-06 00:26:10,265 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:10,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-06-06 00:26:10,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:10,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139013161] [2021-06-06 00:26:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:10,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:10,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139013161] [2021-06-06 00:26:10,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139013161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:10,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227390388] [2021-06-06 00:26:10,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:10,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:26:10,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:10,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:26:10,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:10,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227390388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:10,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:10,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:26:10,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765452153] [2021-06-06 00:26:10,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:26:10,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:10,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:26:10,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:26:10,378 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:10,441 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-06 00:26:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:26:10,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:10,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:10,443 INFO L225 Difference]: With dead ends: 929 [2021-06-06 00:26:10,443 INFO L226 Difference]: Without dead ends: 929 [2021-06-06 00:26:10,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:26:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-06 00:26:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-06 00:26:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-06 00:26:10,456 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-06 00:26:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:10,456 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-06 00:26:10,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-06 00:26:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:10,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:10,457 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:10,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:10,670 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:10,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:10,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-06-06 00:26:10,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:10,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551702793] [2021-06-06 00:26:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:10,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:10,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551702793] [2021-06-06 00:26:10,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551702793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:10,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371691493] [2021-06-06 00:26:10,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:10,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:10,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:10,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:10,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:10,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371691493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:10,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:10,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-06 00:26:10,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292910606] [2021-06-06 00:26:10,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:26:10,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:10,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:26:10,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:26:10,767 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:11,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:11,008 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-06 00:26:11,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:26:11,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:11,011 INFO L225 Difference]: With dead ends: 1555 [2021-06-06 00:26:11,011 INFO L226 Difference]: Without dead ends: 1555 [2021-06-06 00:26:11,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:26:11,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-06 00:26:11,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-06 00:26:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-06 00:26:11,026 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-06 00:26:11,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:11,026 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-06 00:26:11,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:11,026 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-06 00:26:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:11,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:11,028 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:11,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-06 00:26:11,241 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:11,241 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-06-06 00:26:11,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:11,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634003878] [2021-06-06 00:26:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:11,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:11,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634003878] [2021-06-06 00:26:11,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634003878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:11,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689376990] [2021-06-06 00:26:11,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:11,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:26:11,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:11,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:11,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:11,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689376990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:11,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:11,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:26:11,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175716207] [2021-06-06 00:26:11,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:26:11,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:11,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:26:11,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:26:11,345 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:11,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:11,558 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-06 00:26:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:26:11,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:11,561 INFO L225 Difference]: With dead ends: 1605 [2021-06-06 00:26:11,561 INFO L226 Difference]: Without dead ends: 1605 [2021-06-06 00:26:11,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:26:11,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-06 00:26:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-06 00:26:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:11,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-06 00:26:11,576 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-06 00:26:11,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:11,576 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-06 00:26:11,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-06 00:26:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:11,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:11,577 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:11,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:11,789 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:11,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:11,789 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-06-06 00:26:11,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:11,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576322093] [2021-06-06 00:26:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:11,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:11,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576322093] [2021-06-06 00:26:11,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576322093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:11,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507076863] [2021-06-06 00:26:11,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:11,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:11,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:11,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:11,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:26:11,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507076863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:11,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:11,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:26:11,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934201037] [2021-06-06 00:26:11,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:26:11,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:11,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:26:11,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:26:11,886 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:12,049 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-06 00:26:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:26:12,050 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:12,052 INFO L225 Difference]: With dead ends: 1524 [2021-06-06 00:26:12,052 INFO L226 Difference]: Without dead ends: 1520 [2021-06-06 00:26:12,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:26:12,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-06 00:26:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-06 00:26:12,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-06 00:26:12,065 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-06 00:26:12,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:12,065 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-06 00:26:12,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-06 00:26:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:12,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:12,067 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:12,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-06 00:26:12,281 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:12,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:12,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-06-06 00:26:12,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:12,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207979368] [2021-06-06 00:26:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:12,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:12,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207979368] [2021-06-06 00:26:12,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207979368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:12,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610446235] [2021-06-06 00:26:12,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:12,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:26:12,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:12,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:12,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:12,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610446235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:12,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:12,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-06 00:26:12,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701585447] [2021-06-06 00:26:12,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:26:12,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:12,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:26:12,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:26:12,392 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:12,592 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-06 00:26:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:26:12,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:12,595 INFO L225 Difference]: With dead ends: 1508 [2021-06-06 00:26:12,595 INFO L226 Difference]: Without dead ends: 1496 [2021-06-06 00:26:12,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:26:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-06 00:26:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-06 00:26:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-06 00:26:12,609 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-06 00:26:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:12,610 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-06 00:26:12,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-06 00:26:12,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:12,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:12,611 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:12,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:12,811 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:12,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:12,812 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-06-06 00:26:12,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:12,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204931254] [2021-06-06 00:26:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:12,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:12,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204931254] [2021-06-06 00:26:12,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204931254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:12,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065404071] [2021-06-06 00:26:12,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:12,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:26:12,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:12,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:12,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:12,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065404071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:12,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:12,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:26:12,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423794563] [2021-06-06 00:26:12,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:12,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:12,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:12,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:12,942 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:13,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:13,387 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-06 00:26:13,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:26:13,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:13,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:13,390 INFO L225 Difference]: With dead ends: 2412 [2021-06-06 00:26:13,390 INFO L226 Difference]: Without dead ends: 2412 [2021-06-06 00:26:13,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-06 00:26:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-06 00:26:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-06 00:26:13,409 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-06 00:26:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:13,409 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-06 00:26:13,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:13,409 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-06 00:26:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:13,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:13,411 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:13,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-06 00:26:13,625 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:13,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:13,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-06-06 00:26:13,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:13,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679902011] [2021-06-06 00:26:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:13,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:13,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679902011] [2021-06-06 00:26:13,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679902011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:13,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049764329] [2021-06-06 00:26:13,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:13,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:13,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:13,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049764329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:13,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:13,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:26:13,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128533125] [2021-06-06 00:26:13,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:13,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:13,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:13,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:13,760 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:14,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:14,165 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-06 00:26:14,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:26:14,165 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:14,168 INFO L225 Difference]: With dead ends: 2335 [2021-06-06 00:26:14,168 INFO L226 Difference]: Without dead ends: 2335 [2021-06-06 00:26:14,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-06 00:26:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-06 00:26:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-06 00:26:14,186 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-06 00:26:14,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:14,186 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-06 00:26:14,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-06 00:26:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:14,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:14,187 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:14,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:14,392 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:14,392 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-06-06 00:26:14,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:14,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059320714] [2021-06-06 00:26:14,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:14,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:14,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059320714] [2021-06-06 00:26:14,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059320714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:14,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44013579] [2021-06-06 00:26:14,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:14,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:14,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:14,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:14,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:14,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44013579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:14,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:14,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:26:14,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553068047] [2021-06-06 00:26:14,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:26:14,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:14,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:26:14,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:26:14,507 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:14,865 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-06 00:26:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:26:14,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:14,868 INFO L225 Difference]: With dead ends: 2285 [2021-06-06 00:26:14,868 INFO L226 Difference]: Without dead ends: 2285 [2021-06-06 00:26:14,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:26:14,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-06 00:26:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-06 00:26:14,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-06 00:26:14,887 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-06 00:26:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:14,887 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-06 00:26:14,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-06 00:26:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:14,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:14,888 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:15,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-06 00:26:15,104 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:15,105 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-06-06 00:26:15,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:15,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863483426] [2021-06-06 00:26:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:15,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:15,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863483426] [2021-06-06 00:26:15,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863483426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:15,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995374694] [2021-06-06 00:26:15,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:15,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:26:15,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:15,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:15,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:15,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995374694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:15,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:15,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:26:15,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172468927] [2021-06-06 00:26:15,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:26:15,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:15,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:26:15,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:26:15,213 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:15,529 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-06 00:26:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:26:15,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:15,531 INFO L225 Difference]: With dead ends: 2176 [2021-06-06 00:26:15,532 INFO L226 Difference]: Without dead ends: 2172 [2021-06-06 00:26:15,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:26:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-06 00:26:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-06 00:26:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-06 00:26:15,557 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-06 00:26:15,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:15,557 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-06 00:26:15,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-06 00:26:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:15,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:15,569 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:15,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:15,785 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-06-06 00:26:15,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:15,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274962834] [2021-06-06 00:26:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:15,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:15,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274962834] [2021-06-06 00:26:15,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274962834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:15,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054813906] [2021-06-06 00:26:15,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:15,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:15,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:15,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:15,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:15,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054813906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:15,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:15,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:26:15,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802192148] [2021-06-06 00:26:15,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:15,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:15,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:15,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:15,906 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:16,240 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-06 00:26:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:26:16,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:16,243 INFO L225 Difference]: With dead ends: 2199 [2021-06-06 00:26:16,243 INFO L226 Difference]: Without dead ends: 2199 [2021-06-06 00:26:16,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:26:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-06 00:26:16,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-06 00:26:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-06 00:26:16,260 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-06 00:26:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:16,260 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-06 00:26:16,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-06 00:26:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:16,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:16,261 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:16,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-06 00:26:16,462 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:16,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-06-06 00:26:16,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:16,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24163241] [2021-06-06 00:26:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:16,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:16,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24163241] [2021-06-06 00:26:16,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24163241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:16,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820049979] [2021-06-06 00:26:16,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:16,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:26:16,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:16,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:16,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820049979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:16,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:16,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:26:16,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416421564] [2021-06-06 00:26:16,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:16,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:16,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:16,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:16,578 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:16,884 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-06 00:26:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:26:16,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:16,887 INFO L225 Difference]: With dead ends: 2156 [2021-06-06 00:26:16,887 INFO L226 Difference]: Without dead ends: 2152 [2021-06-06 00:26:16,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:26:16,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-06 00:26:16,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-06 00:26:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:16,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-06 00:26:16,904 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-06 00:26:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:16,904 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-06 00:26:16,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-06 00:26:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:16,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:16,905 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:17,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-06 00:26:17,121 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:17,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:17,121 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-06-06 00:26:17,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:17,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534338742] [2021-06-06 00:26:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:17,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:17,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534338742] [2021-06-06 00:26:17,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534338742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:17,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337929590] [2021-06-06 00:26:17,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:17,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:26:17,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:17,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:17,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337929590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:17,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:17,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:26:17,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923858935] [2021-06-06 00:26:17,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:26:17,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:17,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:26:17,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:26:17,232 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:17,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:17,545 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-06 00:26:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:26:17,545 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:17,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:17,548 INFO L225 Difference]: With dead ends: 2097 [2021-06-06 00:26:17,548 INFO L226 Difference]: Without dead ends: 2097 [2021-06-06 00:26:17,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:26:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-06 00:26:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-06 00:26:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-06 00:26:17,565 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-06 00:26:17,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:17,565 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-06 00:26:17,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:17,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-06 00:26:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:17,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:17,567 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:17,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-06 00:26:17,767 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:17,767 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-06-06 00:26:17,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:17,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797059595] [2021-06-06 00:26:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:17,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:17,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797059595] [2021-06-06 00:26:17,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797059595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:17,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165055138] [2021-06-06 00:26:17,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:17,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:17,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:17,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165055138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:17,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:17,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:26:17,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452796391] [2021-06-06 00:26:17,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:26:17,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:17,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:26:17,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:26:17,875 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:18,130 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-06 00:26:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:26:18,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:18,132 INFO L225 Difference]: With dead ends: 1963 [2021-06-06 00:26:18,132 INFO L226 Difference]: Without dead ends: 1959 [2021-06-06 00:26:18,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:26:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-06 00:26:18,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-06 00:26:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-06 00:26:18,148 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-06 00:26:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:18,148 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-06 00:26:18,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-06 00:26:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:18,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:18,150 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:18,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-06 00:26:18,366 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:18,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:18,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-06-06 00:26:18,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:18,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278168865] [2021-06-06 00:26:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:18,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:18,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278168865] [2021-06-06 00:26:18,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278168865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:18,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632596862] [2021-06-06 00:26:18,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:18,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:18,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:18,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:18,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632596862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:18,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:18,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:26:18,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906325418] [2021-06-06 00:26:18,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:26:18,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:26:18,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:26:18,473 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:18,651 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-06 00:26:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:26:18,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:18,654 INFO L225 Difference]: With dead ends: 1728 [2021-06-06 00:26:18,654 INFO L226 Difference]: Without dead ends: 1716 [2021-06-06 00:26:18,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:26:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-06 00:26:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-06 00:26:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:18,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-06 00:26:18,668 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-06 00:26:18,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:18,668 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-06 00:26:18,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:18,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-06 00:26:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:18,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:18,670 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:18,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:18,873 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:18,873 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-06-06 00:26:18,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:18,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811820207] [2021-06-06 00:26:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:18,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:18,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811820207] [2021-06-06 00:26:18,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811820207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:18,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371881854] [2021-06-06 00:26:18,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:18,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:26:18,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:18,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:18,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:19,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371881854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:19,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:19,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:26:19,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945339263] [2021-06-06 00:26:19,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:19,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:19,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:19,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:19,045 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:19,337 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-06 00:26:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:26:19,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:19,339 INFO L225 Difference]: With dead ends: 1821 [2021-06-06 00:26:19,339 INFO L226 Difference]: Without dead ends: 1821 [2021-06-06 00:26:19,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:26:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-06 00:26:19,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-06 00:26:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-06 00:26:19,356 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-06 00:26:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:19,356 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-06 00:26:19,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-06 00:26:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:19,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:19,358 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:19,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-06 00:26:19,574 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:19,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-06-06 00:26:19,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:19,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579532350] [2021-06-06 00:26:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:19,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:19,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579532350] [2021-06-06 00:26:19,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579532350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:19,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075652625] [2021-06-06 00:26:19,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:19,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:19,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:19,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:19,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:19,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075652625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:19,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:19,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:26:19,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791864354] [2021-06-06 00:26:19,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:26:19,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:19,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:26:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:26:19,691 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:19,930 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-06 00:26:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:26:19,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:19,932 INFO L225 Difference]: With dead ends: 1790 [2021-06-06 00:26:19,932 INFO L226 Difference]: Without dead ends: 1786 [2021-06-06 00:26:19,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:26:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-06 00:26:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-06 00:26:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:19,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-06 00:26:19,947 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-06 00:26:19,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:19,947 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-06 00:26:19,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-06 00:26:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:26:19,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:19,949 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:20,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-06 00:26:20,161 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:20,161 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-06-06 00:26:20,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:20,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572786651] [2021-06-06 00:26:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:20,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:20,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572786651] [2021-06-06 00:26:20,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572786651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:20,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194427607] [2021-06-06 00:26:20,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:20,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:26:20,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:20,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:26:20,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:20,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194427607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:20,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:20,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:26:20,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988224187] [2021-06-06 00:26:20,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:26:20,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:26:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:26:20,264 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:20,420 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-06 00:26:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:26:20,424 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:26:20,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:20,426 INFO L225 Difference]: With dead ends: 1649 [2021-06-06 00:26:20,426 INFO L226 Difference]: Without dead ends: 1637 [2021-06-06 00:26:20,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:26:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-06 00:26:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-06 00:26:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-06 00:26:20,441 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-06 00:26:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:20,441 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-06 00:26:20,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:20,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-06 00:26:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:20,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:20,443 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:20,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:20,643 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:20,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:20,644 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-06-06 00:26:20,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:20,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816141098] [2021-06-06 00:26:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:20,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:20,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816141098] [2021-06-06 00:26:20,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816141098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:20,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522407910] [2021-06-06 00:26:20,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:26:20,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:20,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:20,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:26:20,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:21,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:21,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:21,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:26:21,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:21,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:21,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:21,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:26:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:21,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522407910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:21,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:21,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:26:21,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988757790] [2021-06-06 00:26:21,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:26:21,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:26:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:26:21,072 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:21,526 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-06 00:26:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:26:21,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:21,528 INFO L225 Difference]: With dead ends: 1517 [2021-06-06 00:26:21,528 INFO L226 Difference]: Without dead ends: 1502 [2021-06-06 00:26:21,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 514.8ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:26:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-06 00:26:21,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-06 00:26:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-06 00:26:21,555 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-06 00:26:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:21,555 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-06 00:26:21,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-06 00:26:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:21,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:21,556 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:21,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-06 00:26:21,772 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-06-06 00:26:21,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:21,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593304153] [2021-06-06 00:26:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:21,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:21,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593304153] [2021-06-06 00:26:21,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593304153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:21,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093044635] [2021-06-06 00:26:21,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:21,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:26:21,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:21,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:26:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:22,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:22,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:22,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:26:22,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:22,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:22,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:22,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:26:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:22,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093044635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:22,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:22,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:26:22,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020369093] [2021-06-06 00:26:22,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:26:22,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:22,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:26:22,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:26:22,184 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:22,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:22,656 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-06-06 00:26:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:26:22,656 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:22,658 INFO L225 Difference]: With dead ends: 1495 [2021-06-06 00:26:22,658 INFO L226 Difference]: Without dead ends: 1480 [2021-06-06 00:26:22,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:26:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-06 00:26:22,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-06-06 00:26:22,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-06 00:26:22,671 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-06 00:26:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:22,671 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-06 00:26:22,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:22,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-06 00:26:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:22,673 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:22,673 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:22,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:22,874 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:22,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-06-06 00:26:22,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:22,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952448232] [2021-06-06 00:26:22,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:23,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:23,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952448232] [2021-06-06 00:26:23,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952448232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:23,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366647511] [2021-06-06 00:26:23,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:23,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:26:23,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:23,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:26:23,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:23,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:23,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:23,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:23,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:23,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:26:23,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:23,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:23,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:23,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:26:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:23,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366647511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:23,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:23,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:26:23,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109425315] [2021-06-06 00:26:23,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:26:23,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:23,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:26:23,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:26:23,434 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:25,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:25,308 INFO L93 Difference]: Finished difference Result 1658 states and 5345 transitions. [2021-06-06 00:26:25,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:26:25,308 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:25,310 INFO L225 Difference]: With dead ends: 1658 [2021-06-06 00:26:25,310 INFO L226 Difference]: Without dead ends: 1643 [2021-06-06 00:26:25,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1856.7ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:26:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-06-06 00:26:25,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1180. [2021-06-06 00:26:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-06 00:26:25,332 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-06 00:26:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:25,332 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-06 00:26:25,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-06 00:26:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:25,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:25,333 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:25,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-06 00:26:25,549 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:25,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:25,549 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-06-06 00:26:25,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:25,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102596798] [2021-06-06 00:26:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:25,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:25,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102596798] [2021-06-06 00:26:25,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102596798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:25,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214683794] [2021-06-06 00:26:25,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:25,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:26:25,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:26:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:25,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:25,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:26:25,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:25,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:25,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:25,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:26:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:25,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214683794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:25,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:25,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:26:25,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489502920] [2021-06-06 00:26:25,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:26:25,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:25,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:26:25,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:26:25,967 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:26,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:26,712 INFO L93 Difference]: Finished difference Result 1641 states and 5247 transitions. [2021-06-06 00:26:26,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:26:26,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:26,714 INFO L225 Difference]: With dead ends: 1641 [2021-06-06 00:26:26,714 INFO L226 Difference]: Without dead ends: 1626 [2021-06-06 00:26:26,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 697.7ms TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:26:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-06-06 00:26:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1189. [2021-06-06 00:26:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-06-06 00:26:26,729 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-06-06 00:26:26,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:26,729 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-06-06 00:26:26,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:26,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-06-06 00:26:26,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:26,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:26,731 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:26,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:26,931 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:26,931 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-06-06 00:26:26,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:26,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178361275] [2021-06-06 00:26:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:27,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:27,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178361275] [2021-06-06 00:26:27,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178361275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:27,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982634664] [2021-06-06 00:26:27,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:27,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:26:27,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:27,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:27,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:27,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:27,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:27,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:26:27,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:27,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:27,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:27,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:26:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:27,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982634664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:27,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:27,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-06 00:26:27,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795462200] [2021-06-06 00:26:27,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:26:27,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:27,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:26:27,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:26:27,362 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:29,174 INFO L93 Difference]: Finished difference Result 1880 states and 5988 transitions. [2021-06-06 00:26:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:26:29,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:29,176 INFO L225 Difference]: With dead ends: 1880 [2021-06-06 00:26:29,176 INFO L226 Difference]: Without dead ends: 1865 [2021-06-06 00:26:29,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1716.8ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:26:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-06-06 00:26:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1201. [2021-06-06 00:26:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-06-06 00:26:29,191 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-06-06 00:26:29,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:29,191 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-06-06 00:26:29,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-06-06 00:26:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:29,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:29,193 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:29,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-06 00:26:29,394 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:29,394 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-06-06 00:26:29,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:29,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323234623] [2021-06-06 00:26:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:29,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:29,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323234623] [2021-06-06 00:26:29,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323234623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:29,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975340137] [2021-06-06 00:26:29,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:29,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:29,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:29,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:26:29,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:29,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:29,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:29,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:29,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-06 00:26:29,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:26:29,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:29,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:29,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:38 [2021-06-06 00:26:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:29,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975340137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:29,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:29,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-06 00:26:29,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217391623] [2021-06-06 00:26:29,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:26:29,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:29,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:26:29,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:26:29,930 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:31,378 INFO L93 Difference]: Finished difference Result 2084 states and 6623 transitions. [2021-06-06 00:26:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:26:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:31,381 INFO L225 Difference]: With dead ends: 2084 [2021-06-06 00:26:31,381 INFO L226 Difference]: Without dead ends: 2069 [2021-06-06 00:26:31,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1274.0ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:26:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-06 00:26:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1211. [2021-06-06 00:26:31,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.3446280991735535) internal successors, (4047), 1210 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 4047 transitions. [2021-06-06 00:26:31,399 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 4047 transitions. Word has length 26 [2021-06-06 00:26:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:31,399 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 4047 transitions. [2021-06-06 00:26:31,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 4047 transitions. [2021-06-06 00:26:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:31,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:31,401 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:31,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-06 00:26:31,601 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:31,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:31,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-06-06 00:26:31,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:31,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388157495] [2021-06-06 00:26:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:31,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388157495] [2021-06-06 00:26:31,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388157495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836088891] [2021-06-06 00:26:31,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:26:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:31,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:26:31,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:31,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:31,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:31,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:26:31,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:31,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:31,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:31,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:26:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:32,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836088891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:32,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:32,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:26:32,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764320951] [2021-06-06 00:26:32,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:26:32,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:32,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:26:32,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:26:32,006 INFO L87 Difference]: Start difference. First operand 1211 states and 4047 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:32,590 INFO L93 Difference]: Finished difference Result 1614 states and 5256 transitions. [2021-06-06 00:26:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:26:32,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:32,592 INFO L225 Difference]: With dead ends: 1614 [2021-06-06 00:26:32,592 INFO L226 Difference]: Without dead ends: 1599 [2021-06-06 00:26:32,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 566.1ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:26:32,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-06-06 00:26:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1222. [2021-06-06 00:26:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.3415233415233416) internal successors, (4080), 1221 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4080 transitions. [2021-06-06 00:26:32,607 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4080 transitions. Word has length 26 [2021-06-06 00:26:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:32,607 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4080 transitions. [2021-06-06 00:26:32,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4080 transitions. [2021-06-06 00:26:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:32,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:32,609 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:32,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-06 00:26:32,810 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:32,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:32,810 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-06-06 00:26:32,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:32,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70545469] [2021-06-06 00:26:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:33,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:33,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70545469] [2021-06-06 00:26:33,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70545469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:33,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464115747] [2021-06-06 00:26:33,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:33,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:33,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:33,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:26:33,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:33,203 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-06 00:26:33,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-06-06 00:26:33,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:33,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:33,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:33,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:105 [2021-06-06 00:26:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:33,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464115747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:33,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:33,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:26:33,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903816200] [2021-06-06 00:26:33,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:26:33,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:33,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:26:33,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:26:33,346 INFO L87 Difference]: Start difference. First operand 1222 states and 4080 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:35,084 INFO L93 Difference]: Finished difference Result 1877 states and 5972 transitions. [2021-06-06 00:26:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:26:35,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:35,086 INFO L225 Difference]: With dead ends: 1877 [2021-06-06 00:26:35,086 INFO L226 Difference]: Without dead ends: 1862 [2021-06-06 00:26:35,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1443.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:26:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-06-06 00:26:35,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1233. [2021-06-06 00:26:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 3.3506493506493507) internal successors, (4128), 1232 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4128 transitions. [2021-06-06 00:26:35,104 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4128 transitions. Word has length 26 [2021-06-06 00:26:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:35,104 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 4128 transitions. [2021-06-06 00:26:35,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4128 transitions. [2021-06-06 00:26:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:35,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:35,106 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:35,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-06 00:26:35,306 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:35,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:35,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-06-06 00:26:35,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:35,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672403916] [2021-06-06 00:26:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:35,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672403916] [2021-06-06 00:26:35,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672403916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195977766] [2021-06-06 00:26:35,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:35,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:26:35,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:35,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:26:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:35,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:35,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:35,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:26:35,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:35,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:35,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:35,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-06 00:26:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:35,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195977766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:35,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:35,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:26:35,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217725649] [2021-06-06 00:26:35,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:26:35,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:35,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:26:35,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:26:35,713 INFO L87 Difference]: Start difference. First operand 1233 states and 4128 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:36,523 INFO L93 Difference]: Finished difference Result 1868 states and 6061 transitions. [2021-06-06 00:26:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:26:36,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:36,525 INFO L225 Difference]: With dead ends: 1868 [2021-06-06 00:26:36,525 INFO L226 Difference]: Without dead ends: 1853 [2021-06-06 00:26:36,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:26:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-06 00:26:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1242. [2021-06-06 00:26:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.35535858178888) internal successors, (4164), 1241 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4164 transitions. [2021-06-06 00:26:36,542 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4164 transitions. Word has length 26 [2021-06-06 00:26:36,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:36,542 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4164 transitions. [2021-06-06 00:26:36,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4164 transitions. [2021-06-06 00:26:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:36,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:36,544 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:36,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:36,745 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:36,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:36,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-06-06 00:26:36,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:36,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471559852] [2021-06-06 00:26:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:36,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:36,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471559852] [2021-06-06 00:26:36,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471559852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:36,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224481326] [2021-06-06 00:26:36,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:36,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:36,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:36,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:26:36,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:37,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:37,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:37,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:26:37,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:37,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:37,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:37,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:26:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:37,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224481326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:37,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:37,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:26:37,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935430329] [2021-06-06 00:26:37,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:26:37,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:37,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:26:37,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:26:37,110 INFO L87 Difference]: Start difference. First operand 1242 states and 4164 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:37,417 INFO L93 Difference]: Finished difference Result 1425 states and 4676 transitions. [2021-06-06 00:26:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:26:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:37,419 INFO L225 Difference]: With dead ends: 1425 [2021-06-06 00:26:37,419 INFO L226 Difference]: Without dead ends: 1410 [2021-06-06 00:26:37,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:26:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-06-06 00:26:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1238. [2021-06-06 00:26:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.354890864995958) internal successors, (4150), 1237 states have internal predecessors, (4150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4150 transitions. [2021-06-06 00:26:37,434 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4150 transitions. Word has length 26 [2021-06-06 00:26:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:37,434 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4150 transitions. [2021-06-06 00:26:37,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4150 transitions. [2021-06-06 00:26:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:37,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:37,436 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:37,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:37,636 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-06-06 00:26:37,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:37,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138271913] [2021-06-06 00:26:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:37,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:37,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138271913] [2021-06-06 00:26:37,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138271913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:37,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347809936] [2021-06-06 00:26:37,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:37,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:26:37,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:37,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:26:37,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:37,980 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-06 00:26:37,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-06 00:26:37,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:37,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:37,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:37,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-06-06 00:26:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:38,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347809936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:38,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:38,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:26:38,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674255611] [2021-06-06 00:26:38,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:26:38,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:38,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:26:38,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:26:38,032 INFO L87 Difference]: Start difference. First operand 1238 states and 4150 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:39,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:39,326 INFO L93 Difference]: Finished difference Result 2068 states and 6701 transitions. [2021-06-06 00:26:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:26:39,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:39,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:39,329 INFO L225 Difference]: With dead ends: 2068 [2021-06-06 00:26:39,329 INFO L226 Difference]: Without dead ends: 2053 [2021-06-06 00:26:39,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1056.9ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:26:39,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-06 00:26:39,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1241. [2021-06-06 00:26:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.3588709677419355) internal successors, (4165), 1240 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4165 transitions. [2021-06-06 00:26:39,347 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4165 transitions. Word has length 26 [2021-06-06 00:26:39,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:39,347 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4165 transitions. [2021-06-06 00:26:39,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:39,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4165 transitions. [2021-06-06 00:26:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:39,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:39,349 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:39,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-06 00:26:39,549 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:39,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:39,549 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-06-06 00:26:39,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:39,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552251357] [2021-06-06 00:26:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:39,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:39,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552251357] [2021-06-06 00:26:39,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552251357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:39,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978144899] [2021-06-06 00:26:39,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:39,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:26:39,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:39,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:26:39,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:39,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:39,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:39,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:39,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:39,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-06 00:26:39,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:26:39,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:39,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:39,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-06-06 00:26:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:39,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978144899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:39,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:39,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:26:39,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558945424] [2021-06-06 00:26:39,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:26:39,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:39,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:26:39,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:26:39,928 INFO L87 Difference]: Start difference. First operand 1241 states and 4165 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:41,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:41,095 INFO L93 Difference]: Finished difference Result 1837 states and 5986 transitions. [2021-06-06 00:26:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:26:41,096 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:41,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:41,098 INFO L225 Difference]: With dead ends: 1837 [2021-06-06 00:26:41,098 INFO L226 Difference]: Without dead ends: 1822 [2021-06-06 00:26:41,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1001.9ms TimeCoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:26:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-06-06 00:26:41,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1244. [2021-06-06 00:26:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.360418342719228) internal successors, (4177), 1243 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4177 transitions. [2021-06-06 00:26:41,116 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4177 transitions. Word has length 26 [2021-06-06 00:26:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:41,116 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4177 transitions. [2021-06-06 00:26:41,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4177 transitions. [2021-06-06 00:26:41,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:41,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:41,118 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:41,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-06 00:26:41,318 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:41,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1212092298, now seen corresponding path program 13 times [2021-06-06 00:26:41,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:41,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682276446] [2021-06-06 00:26:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:41,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:41,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682276446] [2021-06-06 00:26:41,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682276446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:41,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320111876] [2021-06-06 00:26:41,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:41,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:26:41,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:41,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:41,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:41,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:26:41,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:41,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:41,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:41,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:26:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:41,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320111876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:41,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:41,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:26:41,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202211206] [2021-06-06 00:26:41,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:26:41,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:41,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:26:41,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:26:41,725 INFO L87 Difference]: Start difference. First operand 1244 states and 4177 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:42,510 INFO L93 Difference]: Finished difference Result 1881 states and 6019 transitions. [2021-06-06 00:26:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:26:42,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:42,513 INFO L225 Difference]: With dead ends: 1881 [2021-06-06 00:26:42,513 INFO L226 Difference]: Without dead ends: 1866 [2021-06-06 00:26:42,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 691.4ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:26:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-06 00:26:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1246. [2021-06-06 00:26:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-06-06 00:26:42,537 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-06-06 00:26:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:42,537 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-06-06 00:26:42,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-06-06 00:26:42,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:42,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:42,538 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:42,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:42,740 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:42,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-06-06 00:26:42,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:42,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457637953] [2021-06-06 00:26:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:42,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:42,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457637953] [2021-06-06 00:26:42,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457637953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:42,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157403845] [2021-06-06 00:26:42,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:42,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:26:42,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:42,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:26:42,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:43,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:43,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:43,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:43,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:43,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:26:43,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:43,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:43,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:43,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:26:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:43,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157403845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:43,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:43,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-06 00:26:43,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592017915] [2021-06-06 00:26:43,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:26:43,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:43,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:26:43,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:26:43,112 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:44,888 INFO L93 Difference]: Finished difference Result 2938 states and 9138 transitions. [2021-06-06 00:26:44,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:26:44,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:44,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:44,893 INFO L225 Difference]: With dead ends: 2938 [2021-06-06 00:26:44,893 INFO L226 Difference]: Without dead ends: 2893 [2021-06-06 00:26:44,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1590.8ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:26:44,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-06-06 00:26:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1292. [2021-06-06 00:26:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-06-06 00:26:44,914 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-06-06 00:26:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:44,914 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-06-06 00:26:44,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-06-06 00:26:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:44,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:44,916 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:45,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:45,116 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:45,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1493004622, now seen corresponding path program 14 times [2021-06-06 00:26:45,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:45,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16015673] [2021-06-06 00:26:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:45,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:45,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16015673] [2021-06-06 00:26:45,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16015673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:45,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687169083] [2021-06-06 00:26:45,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:45,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:45,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:26:45,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:45,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:45,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:45,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-06 00:26:45,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:45,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:45,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:45,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:120 [2021-06-06 00:26:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:45,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687169083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:45,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:45,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:26:45,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399551549] [2021-06-06 00:26:45,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:26:45,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:26:45,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:26:45,674 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:47,626 INFO L93 Difference]: Finished difference Result 2343 states and 7345 transitions. [2021-06-06 00:26:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:26:47,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:47,629 INFO L225 Difference]: With dead ends: 2343 [2021-06-06 00:26:47,629 INFO L226 Difference]: Without dead ends: 2313 [2021-06-06 00:26:47,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1774.2ms TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:26:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-06-06 00:26:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1291. [2021-06-06 00:26:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.372093023255814) internal successors, (4350), 1290 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 4350 transitions. [2021-06-06 00:26:47,650 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 4350 transitions. Word has length 26 [2021-06-06 00:26:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:47,650 INFO L482 AbstractCegarLoop]: Abstraction has 1291 states and 4350 transitions. [2021-06-06 00:26:47,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 4350 transitions. [2021-06-06 00:26:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:47,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:47,652 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:47,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-06 00:26:47,852 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:47,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:47,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1417319858, now seen corresponding path program 15 times [2021-06-06 00:26:47,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:47,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380710152] [2021-06-06 00:26:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:47,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:47,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380710152] [2021-06-06 00:26:47,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380710152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:47,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549292795] [2021-06-06 00:26:47,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:48,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:26:48,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:26:48,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:48,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:48,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:48,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-06 00:26:48,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:26:48,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:48,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:48,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-06 00:26:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:48,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549292795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:48,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:48,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-06 00:26:48,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545926113] [2021-06-06 00:26:48,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:26:48,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:48,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:26:48,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:26:48,233 INFO L87 Difference]: Start difference. First operand 1291 states and 4350 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:49,705 INFO L93 Difference]: Finished difference Result 2291 states and 7285 transitions. [2021-06-06 00:26:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:26:49,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:49,708 INFO L225 Difference]: With dead ends: 2291 [2021-06-06 00:26:49,708 INFO L226 Difference]: Without dead ends: 2276 [2021-06-06 00:26:49,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1248.7ms TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:26:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-06 00:26:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1288. [2021-06-06 00:26:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.370629370629371) internal successors, (4338), 1287 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4338 transitions. [2021-06-06 00:26:49,736 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4338 transitions. Word has length 26 [2021-06-06 00:26:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:49,736 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4338 transitions. [2021-06-06 00:26:49,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4338 transitions. [2021-06-06 00:26:49,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:49,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:49,744 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:49,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:49,949 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:49,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:49,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-06-06 00:26:49,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:49,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337807717] [2021-06-06 00:26:49,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:50,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:50,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337807717] [2021-06-06 00:26:50,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337807717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:50,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994426827] [2021-06-06 00:26:50,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:50,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:50,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:26:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:50,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:50,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:50,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:50,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:50,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:26:50,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:50,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:50,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:50,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:26:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:50,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994426827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:50,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:50,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-06 00:26:50,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850500503] [2021-06-06 00:26:50,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:26:50,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:50,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:26:50,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:26:50,316 INFO L87 Difference]: Start difference. First operand 1288 states and 4338 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:51,827 INFO L93 Difference]: Finished difference Result 2760 states and 8712 transitions. [2021-06-06 00:26:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:26:51,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:51,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:51,831 INFO L225 Difference]: With dead ends: 2760 [2021-06-06 00:26:51,831 INFO L226 Difference]: Without dead ends: 2715 [2021-06-06 00:26:51,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1402.8ms TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:26:51,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-06-06 00:26:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1284. [2021-06-06 00:26:51,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.3795791114575215) internal successors, (4336), 1283 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:51,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4336 transitions. [2021-06-06 00:26:51,851 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4336 transitions. Word has length 26 [2021-06-06 00:26:51,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:51,851 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4336 transitions. [2021-06-06 00:26:51,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:51,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4336 transitions. [2021-06-06 00:26:51,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:51,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:51,853 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:52,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:52,055 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:52,065 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-06-06 00:26:52,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:52,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423719674] [2021-06-06 00:26:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:52,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:52,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423719674] [2021-06-06 00:26:52,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423719674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:52,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800615267] [2021-06-06 00:26:52,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:52,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:26:52,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:52,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:26:52,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:52,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:52,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:52,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-06 00:26:52,523 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:26:52,541 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-06 00:26:52,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:52,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-06 00:26:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:52,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800615267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:52,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:52,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-06 00:26:52,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666123705] [2021-06-06 00:26:52,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:26:52,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:52,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:26:52,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:26:52,599 INFO L87 Difference]: Start difference. First operand 1284 states and 4336 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:54,810 INFO L93 Difference]: Finished difference Result 3079 states and 9642 transitions. [2021-06-06 00:26:54,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:26:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:54,814 INFO L225 Difference]: With dead ends: 3079 [2021-06-06 00:26:54,814 INFO L226 Difference]: Without dead ends: 3034 [2021-06-06 00:26:54,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 1874.3ms TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:26:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-06-06 00:26:54,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 1288. [2021-06-06 00:26:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3853923853923855) internal successors, (4357), 1287 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4357 transitions. [2021-06-06 00:26:54,837 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4357 transitions. Word has length 26 [2021-06-06 00:26:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:54,837 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4357 transitions. [2021-06-06 00:26:54,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4357 transitions. [2021-06-06 00:26:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:54,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:54,839 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:55,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:55,053 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:55,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 16 times [2021-06-06 00:26:55,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:55,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424427194] [2021-06-06 00:26:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:55,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:55,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424427194] [2021-06-06 00:26:55,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424427194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:55,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931017297] [2021-06-06 00:26:55,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:26:55,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:55,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:55,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:26:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:55,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:55,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:55,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:26:55,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:55,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:55,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:55,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:26:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:55,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931017297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:55,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:55,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:26:55,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790703123] [2021-06-06 00:26:55,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:26:55,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:55,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:26:55,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:26:55,432 INFO L87 Difference]: Start difference. First operand 1288 states and 4357 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:55,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:55,854 INFO L93 Difference]: Finished difference Result 1650 states and 5457 transitions. [2021-06-06 00:26:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:26:55,854 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:55,856 INFO L225 Difference]: With dead ends: 1650 [2021-06-06 00:26:55,856 INFO L226 Difference]: Without dead ends: 1635 [2021-06-06 00:26:55,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:26:55,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-06 00:26:55,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1305. [2021-06-06 00:26:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.3803680981595092) internal successors, (4408), 1304 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 4408 transitions. [2021-06-06 00:26:55,878 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 4408 transitions. Word has length 26 [2021-06-06 00:26:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:55,878 INFO L482 AbstractCegarLoop]: Abstraction has 1305 states and 4408 transitions. [2021-06-06 00:26:55,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 4408 transitions. [2021-06-06 00:26:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:55,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:55,880 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:56,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:56,081 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:56,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:56,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1110153644, now seen corresponding path program 17 times [2021-06-06 00:26:56,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:56,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699767170] [2021-06-06 00:26:56,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:56,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:56,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699767170] [2021-06-06 00:26:56,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699767170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:56,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549492881] [2021-06-06 00:26:56,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:56,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:26:56,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:56,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:26:56,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:56,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:56,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:56,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:26:56,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:56,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:56,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:56,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:26:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:56,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549492881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:56,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:56,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:26:56,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449909913] [2021-06-06 00:26:56,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:26:56,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:56,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:26:56,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:26:56,485 INFO L87 Difference]: Start difference. First operand 1305 states and 4408 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:57,031 INFO L93 Difference]: Finished difference Result 1637 states and 5415 transitions. [2021-06-06 00:26:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:26:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:57,034 INFO L225 Difference]: With dead ends: 1637 [2021-06-06 00:26:57,034 INFO L226 Difference]: Without dead ends: 1622 [2021-06-06 00:26:57,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 622.9ms TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:26:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-06 00:26:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1297. [2021-06-06 00:26:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-06 00:26:57,064 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-06 00:26:57,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:57,064 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-06 00:26:57,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-06 00:26:57,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:57,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:57,066 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:57,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-06 00:26:57,274 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:57,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:57,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1553655630, now seen corresponding path program 18 times [2021-06-06 00:26:57,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:57,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281412566] [2021-06-06 00:26:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:57,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:57,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281412566] [2021-06-06 00:26:57,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281412566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:57,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270440460] [2021-06-06 00:26:57,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:57,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:26:57,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:57,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:26:57,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:57,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:57,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:57,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:26:57,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:57,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:57,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:57,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-06 00:26:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:57,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270440460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:57,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:57,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:26:57,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554594405] [2021-06-06 00:26:57,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:26:57,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:57,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:26:57,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:26:57,704 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:58,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:58,402 INFO L93 Difference]: Finished difference Result 1880 states and 6175 transitions. [2021-06-06 00:26:58,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:26:58,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:58,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:58,405 INFO L225 Difference]: With dead ends: 1880 [2021-06-06 00:26:58,405 INFO L226 Difference]: Without dead ends: 1865 [2021-06-06 00:26:58,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:26:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-06-06 00:26:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1306. [2021-06-06 00:26:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-06-06 00:26:58,423 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-06-06 00:26:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:58,423 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-06-06 00:26:58,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-06-06 00:26:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:58,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:58,425 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:58,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:58,625 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:58,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:58,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 19 times [2021-06-06 00:26:58,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:58,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675572598] [2021-06-06 00:26:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:58,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:58,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675572598] [2021-06-06 00:26:58,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675572598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:58,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731482167] [2021-06-06 00:26:58,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:58,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:26:58,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:58,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:58,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:26:58,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:26:58,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:58,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:58,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:58,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:26:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:58,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731482167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:58,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:58,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:26:58,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704152326] [2021-06-06 00:26:58,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:26:58,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:58,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:26:58,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:26:58,992 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:59,208 INFO L93 Difference]: Finished difference Result 1472 states and 4885 transitions. [2021-06-06 00:26:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:26:59,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:26:59,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:59,210 INFO L225 Difference]: With dead ends: 1472 [2021-06-06 00:26:59,210 INFO L226 Difference]: Without dead ends: 1457 [2021-06-06 00:26:59,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:26:59,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-06-06 00:26:59,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1300. [2021-06-06 00:26:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 3.3887605850654348) internal successors, (4402), 1299 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 4402 transitions. [2021-06-06 00:26:59,226 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 4402 transitions. Word has length 26 [2021-06-06 00:26:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:59,226 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 4402 transitions. [2021-06-06 00:26:59,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 4402 transitions. [2021-06-06 00:26:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:26:59,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:59,228 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:59,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-06 00:26:59,441 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:59,441 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 20 times [2021-06-06 00:26:59,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:59,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842462582] [2021-06-06 00:26:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:59,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:59,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842462582] [2021-06-06 00:26:59,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842462582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:59,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652376662] [2021-06-06 00:26:59,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:59,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:59,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:59,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:26:59,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:59,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:26:59,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:59,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-06 00:26:59,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:59,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:59,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:26:59,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-06 00:26:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:59,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652376662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:59,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:59,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:26:59,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868752034] [2021-06-06 00:26:59,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:26:59,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:59,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:26:59,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:26:59,880 INFO L87 Difference]: Start difference. First operand 1300 states and 4402 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:00,818 INFO L93 Difference]: Finished difference Result 2107 states and 6896 transitions. [2021-06-06 00:27:00,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:27:00,819 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:00,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:00,821 INFO L225 Difference]: With dead ends: 2107 [2021-06-06 00:27:00,821 INFO L226 Difference]: Without dead ends: 2092 [2021-06-06 00:27:00,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 868.5ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:27:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-06 00:27:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1297. [2021-06-06 00:27:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-06 00:27:00,839 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-06 00:27:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:00,839 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-06 00:27:00,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-06 00:27:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:00,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:00,841 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:01,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:01,042 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:01,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 21 times [2021-06-06 00:27:01,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:01,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805713547] [2021-06-06 00:27:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:01,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:01,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805713547] [2021-06-06 00:27:01,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805713547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:01,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002720948] [2021-06-06 00:27:01,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:01,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:27:01,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:01,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:27:01,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:01,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:01,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:01,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:27:01,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:01,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:01,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:01,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:27:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:01,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002720948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:01,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:01,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-06 00:27:01,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379147635] [2021-06-06 00:27:01,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:01,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:01,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:01,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:01,450 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:02,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:02,481 INFO L93 Difference]: Finished difference Result 1853 states and 6048 transitions. [2021-06-06 00:27:02,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:27:02,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:02,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:02,484 INFO L225 Difference]: With dead ends: 1853 [2021-06-06 00:27:02,484 INFO L226 Difference]: Without dead ends: 1838 [2021-06-06 00:27:02,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 914.7ms TimeCoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:27:02,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-06-06 00:27:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1293. [2021-06-06 00:27:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 3.3823529411764706) internal successors, (4370), 1292 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 4370 transitions. [2021-06-06 00:27:02,501 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 4370 transitions. Word has length 26 [2021-06-06 00:27:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:02,501 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 4370 transitions. [2021-06-06 00:27:02,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:02,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 4370 transitions. [2021-06-06 00:27:02,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:02,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:02,503 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:02,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-06 00:27:02,703 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:02,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:02,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 22 times [2021-06-06 00:27:02,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:02,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249344967] [2021-06-06 00:27:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:02,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:02,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249344967] [2021-06-06 00:27:02,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249344967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:02,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611011045] [2021-06-06 00:27:02,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:02,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:02,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:02,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:27:02,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:03,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:03,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:27:03,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:03,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:03,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:03,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:27:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:03,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611011045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:03,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:03,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:27:03,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255291428] [2021-06-06 00:27:03,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:27:03,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:03,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:27:03,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:27:03,087 INFO L87 Difference]: Start difference. First operand 1293 states and 4370 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:03,605 INFO L93 Difference]: Finished difference Result 1726 states and 5675 transitions. [2021-06-06 00:27:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:27:03,606 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:03,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:03,608 INFO L225 Difference]: With dead ends: 1726 [2021-06-06 00:27:03,608 INFO L226 Difference]: Without dead ends: 1705 [2021-06-06 00:27:03,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:27:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-06 00:27:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1334. [2021-06-06 00:27:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.377344336084021) internal successors, (4502), 1333 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4502 transitions. [2021-06-06 00:27:03,624 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4502 transitions. Word has length 26 [2021-06-06 00:27:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:03,624 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4502 transitions. [2021-06-06 00:27:03,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4502 transitions. [2021-06-06 00:27:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:03,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:03,626 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:03,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:03,826 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:03,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 23 times [2021-06-06 00:27:03,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:03,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778001176] [2021-06-06 00:27:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:04,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:04,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778001176] [2021-06-06 00:27:04,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778001176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:04,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885504521] [2021-06-06 00:27:04,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:27:04,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:27:04,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:04,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:27:04,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:04,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:04,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:04,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-06 00:27:04,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:04,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:04,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:04,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-06-06 00:27:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:04,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885504521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:04,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:04,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:27:04,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799720624] [2021-06-06 00:27:04,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:27:04,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:04,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:27:04,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:27:04,202 INFO L87 Difference]: Start difference. First operand 1334 states and 4502 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:04,587 INFO L93 Difference]: Finished difference Result 1470 states and 4841 transitions. [2021-06-06 00:27:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:27:04,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:04,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:04,589 INFO L225 Difference]: With dead ends: 1470 [2021-06-06 00:27:04,589 INFO L226 Difference]: Without dead ends: 1451 [2021-06-06 00:27:04,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:27:04,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-06 00:27:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1328. [2021-06-06 00:27:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.376789751318764) internal successors, (4481), 1327 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4481 transitions. [2021-06-06 00:27:04,604 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4481 transitions. Word has length 26 [2021-06-06 00:27:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:04,604 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4481 transitions. [2021-06-06 00:27:04,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4481 transitions. [2021-06-06 00:27:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:04,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:04,606 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:04,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-06 00:27:04,806 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:04,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:04,806 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 24 times [2021-06-06 00:27:04,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:04,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365725073] [2021-06-06 00:27:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:04,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:04,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365725073] [2021-06-06 00:27:04,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365725073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:04,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975286426] [2021-06-06 00:27:04,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:05,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:27:05,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:05,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:27:05,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:05,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:05,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:05,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:05,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-06-06 00:27:05,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:27:05,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:05,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:05,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:28 [2021-06-06 00:27:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:05,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975286426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:05,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:05,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:27:05,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705815218] [2021-06-06 00:27:05,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:27:05,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:05,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:27:05,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:27:05,178 INFO L87 Difference]: Start difference. First operand 1328 states and 4481 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:05,820 INFO L93 Difference]: Finished difference Result 1962 states and 6398 transitions. [2021-06-06 00:27:05,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:27:05,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:05,823 INFO L225 Difference]: With dead ends: 1962 [2021-06-06 00:27:05,823 INFO L226 Difference]: Without dead ends: 1937 [2021-06-06 00:27:05,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 581.4ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:27:05,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-06 00:27:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1331. [2021-06-06 00:27:05,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.3774436090225564) internal successors, (4492), 1330 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4492 transitions. [2021-06-06 00:27:05,841 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4492 transitions. Word has length 26 [2021-06-06 00:27:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:05,841 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4492 transitions. [2021-06-06 00:27:05,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4492 transitions. [2021-06-06 00:27:05,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:05,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:05,843 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:06,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-06 00:27:06,043 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:06,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 25 times [2021-06-06 00:27:06,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:06,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705422074] [2021-06-06 00:27:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:06,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:06,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705422074] [2021-06-06 00:27:06,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705422074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:06,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51764718] [2021-06-06 00:27:06,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:27:06,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:06,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:06,385 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-06 00:27:06,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 36 [2021-06-06 00:27:06,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:06,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:06,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:06,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:5 [2021-06-06 00:27:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:06,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51764718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:06,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:06,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:27:06,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111025672] [2021-06-06 00:27:06,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:27:06,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:06,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:27:06,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:27:06,411 INFO L87 Difference]: Start difference. First operand 1331 states and 4492 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:06,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:06,739 INFO L93 Difference]: Finished difference Result 1522 states and 5028 transitions. [2021-06-06 00:27:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:27:06,740 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:06,742 INFO L225 Difference]: With dead ends: 1522 [2021-06-06 00:27:06,742 INFO L226 Difference]: Without dead ends: 1507 [2021-06-06 00:27:06,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:27:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-06-06 00:27:06,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1337. [2021-06-06 00:27:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.379491017964072) internal successors, (4515), 1336 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4515 transitions. [2021-06-06 00:27:06,756 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4515 transitions. Word has length 26 [2021-06-06 00:27:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:06,756 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4515 transitions. [2021-06-06 00:27:06,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:06,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4515 transitions. [2021-06-06 00:27:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:06,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:06,758 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:06,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-06 00:27:06,958 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:06,958 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 26 times [2021-06-06 00:27:06,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:06,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753762667] [2021-06-06 00:27:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:07,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:07,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753762667] [2021-06-06 00:27:07,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753762667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:07,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159085025] [2021-06-06 00:27:07,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:07,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:07,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:07,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:27:07,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:07,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:07,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:07,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-06 00:27:07,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:27:07,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:07,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:07,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-06-06 00:27:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:07,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159085025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:07,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:07,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:27:07,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133210643] [2021-06-06 00:27:07,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:07,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:07,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:07,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:07,313 INFO L87 Difference]: Start difference. First operand 1337 states and 4515 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:07,801 INFO L93 Difference]: Finished difference Result 1802 states and 5923 transitions. [2021-06-06 00:27:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:27:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:07,804 INFO L225 Difference]: With dead ends: 1802 [2021-06-06 00:27:07,804 INFO L226 Difference]: Without dead ends: 1777 [2021-06-06 00:27:07,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 519.9ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:27:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-06 00:27:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1344. [2021-06-06 00:27:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3842144452717795) internal successors, (4545), 1343 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4545 transitions. [2021-06-06 00:27:07,820 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4545 transitions. Word has length 26 [2021-06-06 00:27:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:07,820 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 4545 transitions. [2021-06-06 00:27:07,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:07,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4545 transitions. [2021-06-06 00:27:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:07,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:07,829 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:08,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:08,029 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:08,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:08,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 27 times [2021-06-06 00:27:08,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:08,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355193494] [2021-06-06 00:27:08,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:08,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:08,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355193494] [2021-06-06 00:27:08,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355193494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:08,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184204390] [2021-06-06 00:27:08,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:08,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:27:08,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:08,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:27:08,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:08,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:08,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:08,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:27:08,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:08,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:08,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:08,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:27:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:08,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184204390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:08,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:08,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:27:08,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284754549] [2021-06-06 00:27:08,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:27:08,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:08,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:27:08,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:27:08,406 INFO L87 Difference]: Start difference. First operand 1344 states and 4545 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:08,927 INFO L93 Difference]: Finished difference Result 1709 states and 5671 transitions. [2021-06-06 00:27:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:27:08,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:08,929 INFO L225 Difference]: With dead ends: 1709 [2021-06-06 00:27:08,929 INFO L226 Difference]: Without dead ends: 1694 [2021-06-06 00:27:08,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:27:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-06-06 00:27:08,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1355. [2021-06-06 00:27:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.3840472673559825) internal successors, (4582), 1354 states have internal predecessors, (4582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4582 transitions. [2021-06-06 00:27:08,945 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4582 transitions. Word has length 26 [2021-06-06 00:27:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:08,945 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4582 transitions. [2021-06-06 00:27:08,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4582 transitions. [2021-06-06 00:27:08,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:08,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:08,947 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:09,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-06 00:27:09,147 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 28 times [2021-06-06 00:27:09,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:09,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252601734] [2021-06-06 00:27:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:09,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:09,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252601734] [2021-06-06 00:27:09,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252601734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:09,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284799369] [2021-06-06 00:27:09,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:09,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:09,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:09,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:27:09,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:09,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:09,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:09,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-06 00:27:09,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:27:09,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:09,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:09,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-06 00:27:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:09,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284799369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:09,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:09,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:27:09,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56462940] [2021-06-06 00:27:09,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:27:09,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:09,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:27:09,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:27:09,504 INFO L87 Difference]: Start difference. First operand 1355 states and 4582 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:10,127 INFO L93 Difference]: Finished difference Result 2043 states and 6705 transitions. [2021-06-06 00:27:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:27:10,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:10,130 INFO L225 Difference]: With dead ends: 2043 [2021-06-06 00:27:10,130 INFO L226 Difference]: Without dead ends: 2024 [2021-06-06 00:27:10,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 566.4ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:27:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-06-06 00:27:10,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1356. [2021-06-06 00:27:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3874538745387452) internal successors, (4590), 1355 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4590 transitions. [2021-06-06 00:27:10,148 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4590 transitions. Word has length 26 [2021-06-06 00:27:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:10,148 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4590 transitions. [2021-06-06 00:27:10,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4590 transitions. [2021-06-06 00:27:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:10,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:10,150 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:10,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:10,350 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:10,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 29 times [2021-06-06 00:27:10,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:10,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495474269] [2021-06-06 00:27:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:10,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:10,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495474269] [2021-06-06 00:27:10,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495474269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:10,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905751733] [2021-06-06 00:27:10,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:27:10,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:27:10,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:10,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:27:10,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:10,727 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-06 00:27:10,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-06 00:27:10,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:10,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:10,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:10,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-06-06 00:27:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:10,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905751733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:10,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:10,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:27:10,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720084022] [2021-06-06 00:27:10,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:27:10,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:10,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:27:10,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:27:10,777 INFO L87 Difference]: Start difference. First operand 1356 states and 4590 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:11,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:11,423 INFO L93 Difference]: Finished difference Result 2000 states and 6546 transitions. [2021-06-06 00:27:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:27:11,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:11,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:11,425 INFO L225 Difference]: With dead ends: 2000 [2021-06-06 00:27:11,425 INFO L226 Difference]: Without dead ends: 1950 [2021-06-06 00:27:11,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:27:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-06-06 00:27:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1356. [2021-06-06 00:27:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3874538745387452) internal successors, (4590), 1355 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4590 transitions. [2021-06-06 00:27:11,448 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4590 transitions. Word has length 26 [2021-06-06 00:27:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:11,448 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4590 transitions. [2021-06-06 00:27:11,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:11,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4590 transitions. [2021-06-06 00:27:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:11,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:11,450 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:11,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-06 00:27:11,650 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:11,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:11,651 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-06-06 00:27:11,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:11,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537948053] [2021-06-06 00:27:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:11,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:11,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537948053] [2021-06-06 00:27:11,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537948053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:11,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529199090] [2021-06-06 00:27:11,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:11,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:27:11,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:11,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-06 00:27:11,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:12,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:12,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:12,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:12,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:27:12,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:12,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:12,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:12,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:27:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:12,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529199090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:12,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:12,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:27:12,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100181104] [2021-06-06 00:27:12,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:27:12,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:12,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:27:12,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:27:12,074 INFO L87 Difference]: Start difference. First operand 1356 states and 4590 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:12,784 INFO L93 Difference]: Finished difference Result 1907 states and 6150 transitions. [2021-06-06 00:27:12,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:27:12,784 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:12,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:12,786 INFO L225 Difference]: With dead ends: 1907 [2021-06-06 00:27:12,786 INFO L226 Difference]: Without dead ends: 1855 [2021-06-06 00:27:12,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 803.6ms TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:27:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-06-06 00:27:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1390. [2021-06-06 00:27:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.375809935205184) internal successors, (4689), 1389 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4689 transitions. [2021-06-06 00:27:12,803 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4689 transitions. Word has length 26 [2021-06-06 00:27:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:12,803 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4689 transitions. [2021-06-06 00:27:12,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4689 transitions. [2021-06-06 00:27:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:12,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:12,804 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:13,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-06 00:27:13,020 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-06-06 00:27:13,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:13,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600697876] [2021-06-06 00:27:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:13,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:13,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600697876] [2021-06-06 00:27:13,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600697876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:13,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258888950] [2021-06-06 00:27:13,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:13,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:27:13,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:13,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:13,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:13,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:27:13,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:13,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:13,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:13,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:27:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:13,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258888950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:13,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:13,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-06 00:27:13,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300815086] [2021-06-06 00:27:13,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:27:13,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:13,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:27:13,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:27:13,378 INFO L87 Difference]: Start difference. First operand 1390 states and 4689 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:14,344 INFO L93 Difference]: Finished difference Result 1968 states and 6459 transitions. [2021-06-06 00:27:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:27:14,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:14,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:14,347 INFO L225 Difference]: With dead ends: 1968 [2021-06-06 00:27:14,347 INFO L226 Difference]: Without dead ends: 1953 [2021-06-06 00:27:14,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 896.4ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:27:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-06 00:27:14,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1398. [2021-06-06 00:27:14,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3707945597709377) internal successors, (4709), 1397 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4709 transitions. [2021-06-06 00:27:14,364 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4709 transitions. Word has length 26 [2021-06-06 00:27:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:14,364 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4709 transitions. [2021-06-06 00:27:14,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4709 transitions. [2021-06-06 00:27:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:14,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:14,365 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:14,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-06 00:27:14,566 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 30 times [2021-06-06 00:27:14,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:14,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885948381] [2021-06-06 00:27:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:14,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:14,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885948381] [2021-06-06 00:27:14,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885948381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:14,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22489454] [2021-06-06 00:27:14,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:14,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:27:14,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:14,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:27:14,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:14,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:14,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:14,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-06 00:27:14,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:14,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:14,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:14,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:98 [2021-06-06 00:27:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:15,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22489454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:15,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:15,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:27:15,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182428023] [2021-06-06 00:27:15,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:27:15,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:15,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:27:15,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:27:15,087 INFO L87 Difference]: Start difference. First operand 1398 states and 4709 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:17,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:17,360 INFO L93 Difference]: Finished difference Result 2366 states and 7465 transitions. [2021-06-06 00:27:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:27:17,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:17,363 INFO L225 Difference]: With dead ends: 2366 [2021-06-06 00:27:17,363 INFO L226 Difference]: Without dead ends: 2332 [2021-06-06 00:27:17,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2000.8ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:27:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-06 00:27:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1421. [2021-06-06 00:27:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 3.3816901408450706) internal successors, (4802), 1420 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4802 transitions. [2021-06-06 00:27:17,383 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4802 transitions. Word has length 26 [2021-06-06 00:27:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:17,383 INFO L482 AbstractCegarLoop]: Abstraction has 1421 states and 4802 transitions. [2021-06-06 00:27:17,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4802 transitions. [2021-06-06 00:27:17,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:17,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:17,385 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:17,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:17,585 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:17,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:17,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-06-06 00:27:17,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:17,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949174563] [2021-06-06 00:27:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:17,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:17,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949174563] [2021-06-06 00:27:17,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949174563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:17,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779408823] [2021-06-06 00:27:17,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:17,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:17,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:17,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:27:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:18,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:18,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:18,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:18,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-06 00:27:18,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:27:18,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:18,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:18,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:46 [2021-06-06 00:27:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:18,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779408823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:18,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:18,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:27:18,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487793364] [2021-06-06 00:27:18,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:27:18,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:18,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:27:18,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:27:18,113 INFO L87 Difference]: Start difference. First operand 1421 states and 4802 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:20,524 INFO L93 Difference]: Finished difference Result 2286 states and 7249 transitions. [2021-06-06 00:27:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:27:20,524 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:20,527 INFO L225 Difference]: With dead ends: 2286 [2021-06-06 00:27:20,527 INFO L226 Difference]: Without dead ends: 2249 [2021-06-06 00:27:20,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2150.9ms TimeCoverageRelationStatistics Valid=447, Invalid=2415, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:27:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-06-06 00:27:20,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1440. [2021-06-06 00:27:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.3794301598332175) internal successors, (4863), 1439 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4863 transitions. [2021-06-06 00:27:20,546 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4863 transitions. Word has length 26 [2021-06-06 00:27:20,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:20,547 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 4863 transitions. [2021-06-06 00:27:20,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4863 transitions. [2021-06-06 00:27:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:20,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:20,548 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:20,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-06 00:27:20,749 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1791604362, now seen corresponding path program 31 times [2021-06-06 00:27:20,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:20,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768222814] [2021-06-06 00:27:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:20,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:20,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768222814] [2021-06-06 00:27:20,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768222814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:20,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439332420] [2021-06-06 00:27:20,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:20,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:27:20,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:21,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:21,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:21,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:27:21,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:21,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:21,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:21,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:27:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:21,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439332420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:21,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:21,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:27:21,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497848936] [2021-06-06 00:27:21,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:27:21,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:21,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:27:21,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:27:21,120 INFO L87 Difference]: Start difference. First operand 1440 states and 4863 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:21,885 INFO L93 Difference]: Finished difference Result 2060 states and 6655 transitions. [2021-06-06 00:27:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:27:21,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:21,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:21,888 INFO L225 Difference]: With dead ends: 2060 [2021-06-06 00:27:21,888 INFO L226 Difference]: Without dead ends: 2045 [2021-06-06 00:27:21,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 714.5ms TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:27:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-06-06 00:27:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1446. [2021-06-06 00:27:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.382006920415225) internal successors, (4887), 1445 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4887 transitions. [2021-06-06 00:27:21,906 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4887 transitions. Word has length 26 [2021-06-06 00:27:21,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:21,906 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4887 transitions. [2021-06-06 00:27:21,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4887 transitions. [2021-06-06 00:27:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:21,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:21,908 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:22,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:22,109 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:22,109 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 32 times [2021-06-06 00:27:22,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:22,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399363225] [2021-06-06 00:27:22,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:22,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:22,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399363225] [2021-06-06 00:27:22,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399363225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:22,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480483636] [2021-06-06 00:27:22,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:22,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:22,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:22,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:27:22,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:22,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:22,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-06 00:27:22,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:22,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:22,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-06 00:27:22,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:312 [2021-06-06 00:27:22,639 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-06 00:27:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:22,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480483636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:22,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:22,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-06 00:27:22,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839145849] [2021-06-06 00:27:22,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:22,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:22,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:22,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:22,804 INFO L87 Difference]: Start difference. First operand 1446 states and 4887 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:23,815 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-06 00:27:23,949 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 38 [2021-06-06 00:27:24,088 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-06 00:27:24,408 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-06 00:27:24,583 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2021-06-06 00:27:25,182 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-06 00:27:25,369 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 26 [2021-06-06 00:27:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:25,441 INFO L93 Difference]: Finished difference Result 2667 states and 8418 transitions. [2021-06-06 00:27:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:27:25,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:25,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:25,445 INFO L225 Difference]: With dead ends: 2667 [2021-06-06 00:27:25,445 INFO L226 Difference]: Without dead ends: 2629 [2021-06-06 00:27:25,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2529.2ms TimeCoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:27:25,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-06-06 00:27:25,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1442. [2021-06-06 00:27:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3809854267869537) internal successors, (4872), 1441 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4872 transitions. [2021-06-06 00:27:25,466 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4872 transitions. Word has length 26 [2021-06-06 00:27:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:25,466 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4872 transitions. [2021-06-06 00:27:25,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4872 transitions. [2021-06-06 00:27:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:25,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:25,468 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:25,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-06 00:27:25,668 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:25,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:25,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 45 times [2021-06-06 00:27:25,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:25,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357150675] [2021-06-06 00:27:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:25,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:25,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357150675] [2021-06-06 00:27:25,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357150675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:25,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221700930] [2021-06-06 00:27:25,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:25,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:27:25,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:25,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:27:25,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:26,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:26,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:26,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:26,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:26,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-06 00:27:26,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:27:26,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:26,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:26,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:46 [2021-06-06 00:27:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:26,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221700930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:26,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:26,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-06 00:27:26,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720646479] [2021-06-06 00:27:26,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:27:26,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:26,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:27:26,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:27:26,154 INFO L87 Difference]: Start difference. First operand 1442 states and 4872 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:27,501 INFO L93 Difference]: Finished difference Result 2363 states and 7703 transitions. [2021-06-06 00:27:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:27:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:27,505 INFO L225 Difference]: With dead ends: 2363 [2021-06-06 00:27:27,505 INFO L226 Difference]: Without dead ends: 2348 [2021-06-06 00:27:27,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1234.4ms TimeCoverageRelationStatistics Valid=351, Invalid=1719, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:27:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-06 00:27:27,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1449. [2021-06-06 00:27:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.382596685082873) internal successors, (4898), 1448 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4898 transitions. [2021-06-06 00:27:27,525 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4898 transitions. Word has length 26 [2021-06-06 00:27:27,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:27,525 INFO L482 AbstractCegarLoop]: Abstraction has 1449 states and 4898 transitions. [2021-06-06 00:27:27,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4898 transitions. [2021-06-06 00:27:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:27,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:27,527 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:27,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:27,741 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:27,741 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 46 times [2021-06-06 00:27:27,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:27,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076924811] [2021-06-06 00:27:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:27,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:27,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076924811] [2021-06-06 00:27:27,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076924811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:27,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781221765] [2021-06-06 00:27:27,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:27,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:27,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:27,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:27:27,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:28,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:28,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:28,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-06 00:27:28,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:27:28,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:28,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:28,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-06 00:27:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:28,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781221765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:28,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:28,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-06 00:27:28,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839587174] [2021-06-06 00:27:28,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:28,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:28,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:28,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:28,138 INFO L87 Difference]: Start difference. First operand 1449 states and 4898 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:30,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:30,007 INFO L93 Difference]: Finished difference Result 3450 states and 10856 transitions. [2021-06-06 00:27:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:27:30,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:30,012 INFO L225 Difference]: With dead ends: 3450 [2021-06-06 00:27:30,012 INFO L226 Difference]: Without dead ends: 3393 [2021-06-06 00:27:30,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1621.6ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:27:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2021-06-06 00:27:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 1615. [2021-06-06 00:27:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.4052044609665426) internal successors, (5496), 1614 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5496 transitions. [2021-06-06 00:27:30,048 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5496 transitions. Word has length 26 [2021-06-06 00:27:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:30,048 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5496 transitions. [2021-06-06 00:27:30,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5496 transitions. [2021-06-06 00:27:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:30,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:30,050 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:30,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-06 00:27:30,257 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:30,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 33 times [2021-06-06 00:27:30,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:30,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123608447] [2021-06-06 00:27:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:30,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:30,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123608447] [2021-06-06 00:27:30,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123608447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:30,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787113993] [2021-06-06 00:27:30,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:30,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:27:30,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:30,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:27:30,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:30,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:30,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-06 00:27:30,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:30,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:30,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:30,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:75 [2021-06-06 00:27:30,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:30,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787113993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:30,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:30,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-06 00:27:30,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359046553] [2021-06-06 00:27:30,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:30,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:30,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:30,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:30,692 INFO L87 Difference]: Start difference. First operand 1615 states and 5496 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:32,127 INFO L93 Difference]: Finished difference Result 2210 states and 7258 transitions. [2021-06-06 00:27:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:27:32,127 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:32,130 INFO L225 Difference]: With dead ends: 2210 [2021-06-06 00:27:32,130 INFO L226 Difference]: Without dead ends: 2180 [2021-06-06 00:27:32,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1124.3ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:27:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-06-06 00:27:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1620. [2021-06-06 00:27:32,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4021000617665225) internal successors, (5508), 1619 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5508 transitions. [2021-06-06 00:27:32,150 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5508 transitions. Word has length 26 [2021-06-06 00:27:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:32,151 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5508 transitions. [2021-06-06 00:27:32,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5508 transitions. [2021-06-06 00:27:32,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:32,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:32,153 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:32,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:32,353 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:32,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 34 times [2021-06-06 00:27:32,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:32,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080609911] [2021-06-06 00:27:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:32,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:32,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080609911] [2021-06-06 00:27:32,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080609911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:32,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422587479] [2021-06-06 00:27:32,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:32,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:32,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:27:32,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:32,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:32,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:32,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-06 00:27:32,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:27:32,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:32,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:32,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-06 00:27:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:32,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422587479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:32,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:32,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:27:32,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889708719] [2021-06-06 00:27:32,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:27:32,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:27:32,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:27:32,691 INFO L87 Difference]: Start difference. First operand 1620 states and 5508 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:33,332 INFO L93 Difference]: Finished difference Result 2187 states and 7261 transitions. [2021-06-06 00:27:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:27:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:33,335 INFO L225 Difference]: With dead ends: 2187 [2021-06-06 00:27:33,335 INFO L226 Difference]: Without dead ends: 2162 [2021-06-06 00:27:33,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:27:33,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-06-06 00:27:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1623. [2021-06-06 00:27:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.401356350184957) internal successors, (5517), 1622 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5517 transitions. [2021-06-06 00:27:33,355 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5517 transitions. Word has length 26 [2021-06-06 00:27:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:33,355 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5517 transitions. [2021-06-06 00:27:33,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5517 transitions. [2021-06-06 00:27:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:33,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:33,359 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:33,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:33,561 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2031976096, now seen corresponding path program 35 times [2021-06-06 00:27:33,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:33,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479010343] [2021-06-06 00:27:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:33,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:33,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479010343] [2021-06-06 00:27:33,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479010343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:33,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884352379] [2021-06-06 00:27:33,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:33,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:27:33,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:33,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:27:33,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:33,889 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-06 00:27:33,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 56 [2021-06-06 00:27:33,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:33,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:33,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:33,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:19 [2021-06-06 00:27:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:33,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884352379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:33,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:33,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:27:33,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334084430] [2021-06-06 00:27:33,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:27:33,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:33,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:27:33,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:27:33,942 INFO L87 Difference]: Start difference. First operand 1623 states and 5517 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:35,210 INFO L93 Difference]: Finished difference Result 2464 states and 8030 transitions. [2021-06-06 00:27:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:27:35,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:35,213 INFO L225 Difference]: With dead ends: 2464 [2021-06-06 00:27:35,213 INFO L226 Difference]: Without dead ends: 2430 [2021-06-06 00:27:35,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1058.3ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:27:35,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-06-06 00:27:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1617. [2021-06-06 00:27:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 3.3991336633663365) internal successors, (5493), 1616 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5493 transitions. [2021-06-06 00:27:35,235 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5493 transitions. Word has length 26 [2021-06-06 00:27:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:35,236 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 5493 transitions. [2021-06-06 00:27:35,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:35,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5493 transitions. [2021-06-06 00:27:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:35,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:35,237 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:35,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:35,441 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 47 times [2021-06-06 00:27:35,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:35,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063272767] [2021-06-06 00:27:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:35,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:35,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063272767] [2021-06-06 00:27:35,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063272767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:35,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755086914] [2021-06-06 00:27:35,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:35,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:27:35,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:35,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:27:35,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:35,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:35,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:35,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:35,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:35,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:27:35,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:35,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:35,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:35,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:27:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:35,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755086914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:35,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:35,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-06 00:27:35,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312947938] [2021-06-06 00:27:35,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:27:35,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:35,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:27:35,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:27:35,867 INFO L87 Difference]: Start difference. First operand 1617 states and 5493 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:36,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:36,953 INFO L93 Difference]: Finished difference Result 2080 states and 6843 transitions. [2021-06-06 00:27:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:27:36,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:36,956 INFO L225 Difference]: With dead ends: 2080 [2021-06-06 00:27:36,956 INFO L226 Difference]: Without dead ends: 2058 [2021-06-06 00:27:36,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 996.3ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:36,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-06 00:27:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1607. [2021-06-06 00:27:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.398505603985056) internal successors, (5458), 1606 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5458 transitions. [2021-06-06 00:27:36,975 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5458 transitions. Word has length 26 [2021-06-06 00:27:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:36,975 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5458 transitions. [2021-06-06 00:27:36,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5458 transitions. [2021-06-06 00:27:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:36,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:36,977 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:37,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:37,177 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:37,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:37,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 48 times [2021-06-06 00:27:37,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:37,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118377146] [2021-06-06 00:27:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:37,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:37,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118377146] [2021-06-06 00:27:37,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118377146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:37,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538910052] [2021-06-06 00:27:37,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:37,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:27:37,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:37,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:27:37,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:37,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:37,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:37,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:37,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:37,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-06 00:27:37,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:37,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:37,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:37,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-06 00:27:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:37,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538910052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:37,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:37,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:27:37,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111661791] [2021-06-06 00:27:37,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:37,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:37,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:37,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:37,673 INFO L87 Difference]: Start difference. First operand 1607 states and 5458 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:39,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:39,209 INFO L93 Difference]: Finished difference Result 2207 states and 7294 transitions. [2021-06-06 00:27:39,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:27:39,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:39,212 INFO L225 Difference]: With dead ends: 2207 [2021-06-06 00:27:39,212 INFO L226 Difference]: Without dead ends: 2192 [2021-06-06 00:27:39,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1503.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:27:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-06-06 00:27:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1607. [2021-06-06 00:27:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.398505603985056) internal successors, (5458), 1606 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5458 transitions. [2021-06-06 00:27:39,232 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5458 transitions. Word has length 26 [2021-06-06 00:27:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:39,232 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5458 transitions. [2021-06-06 00:27:39,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:39,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5458 transitions. [2021-06-06 00:27:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:39,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:39,234 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:39,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-06 00:27:39,435 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:39,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:39,435 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 49 times [2021-06-06 00:27:39,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:39,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449961908] [2021-06-06 00:27:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:39,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:39,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449961908] [2021-06-06 00:27:39,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449961908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:39,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765061394] [2021-06-06 00:27:39,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:39,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:27:39,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:39,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:39,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:39,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:39,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:27:39,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:39,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:39,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:39,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:27:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:39,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765061394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:39,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:39,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-06 00:27:39,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13549657] [2021-06-06 00:27:39,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:39,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:39,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:39,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:39,836 INFO L87 Difference]: Start difference. First operand 1607 states and 5458 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:41,311 INFO L93 Difference]: Finished difference Result 2722 states and 8796 transitions. [2021-06-06 00:27:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:27:41,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:41,314 INFO L225 Difference]: With dead ends: 2722 [2021-06-06 00:27:41,314 INFO L226 Difference]: Without dead ends: 2686 [2021-06-06 00:27:41,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1294.4ms TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:27:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-06-06 00:27:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1677. [2021-06-06 00:27:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.389021479713604) internal successors, (5680), 1676 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5680 transitions. [2021-06-06 00:27:41,339 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5680 transitions. Word has length 26 [2021-06-06 00:27:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:41,339 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5680 transitions. [2021-06-06 00:27:41,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5680 transitions. [2021-06-06 00:27:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:41,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:41,341 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:41,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-06 00:27:41,541 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:41,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:41,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1611336786, now seen corresponding path program 50 times [2021-06-06 00:27:41,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:41,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755726095] [2021-06-06 00:27:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:41,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:41,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755726095] [2021-06-06 00:27:41,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755726095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:41,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628624792] [2021-06-06 00:27:41,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:41,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:41,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:41,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:27:41,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:41,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:41,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:41,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:41,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-06 00:27:41,920 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:27:41,947 INFO L628 ElimStorePlain]: treesize reduction 20, result has 47.4 percent of original size [2021-06-06 00:27:41,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:41,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:18 [2021-06-06 00:27:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:41,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628624792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:41,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:41,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-06-06 00:27:41,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986414237] [2021-06-06 00:27:41,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:27:41,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:41,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:27:41,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:27:41,988 INFO L87 Difference]: Start difference. First operand 1677 states and 5680 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:45,730 INFO L93 Difference]: Finished difference Result 3350 states and 10511 transitions. [2021-06-06 00:27:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-06 00:27:45,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:45,734 INFO L225 Difference]: With dead ends: 3350 [2021-06-06 00:27:45,734 INFO L226 Difference]: Without dead ends: 3286 [2021-06-06 00:27:45,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 3279.1ms TimeCoverageRelationStatistics Valid=1163, Invalid=5317, Unknown=0, NotChecked=0, Total=6480 [2021-06-06 00:27:45,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-06 00:27:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 1694. [2021-06-06 00:27:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 3.375073833431778) internal successors, (5714), 1693 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 5714 transitions. [2021-06-06 00:27:45,761 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 5714 transitions. Word has length 26 [2021-06-06 00:27:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:45,762 INFO L482 AbstractCegarLoop]: Abstraction has 1694 states and 5714 transitions. [2021-06-06 00:27:45,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 5714 transitions. [2021-06-06 00:27:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:45,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:45,764 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:45,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-06 00:27:45,964 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:45,964 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-06-06 00:27:45,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:45,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79357710] [2021-06-06 00:27:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:46,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:46,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79357710] [2021-06-06 00:27:46,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79357710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:46,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056771541] [2021-06-06 00:27:46,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:46,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:27:46,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:46,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:27:46,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:46,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:46,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 51 [2021-06-06 00:27:46,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:27:46,590 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-06 00:27:46,590 INFO L628 ElimStorePlain]: treesize reduction 81, result has 51.5 percent of original size [2021-06-06 00:27:46,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:46,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:273 [2021-06-06 00:27:46,733 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-06 00:27:46,888 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-06 00:27:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:46,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056771541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:46,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:46,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-06 00:27:46,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694678505] [2021-06-06 00:27:46,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:27:46,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:46,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:27:46,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:27:46,961 INFO L87 Difference]: Start difference. First operand 1694 states and 5714 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:47,829 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-06 00:27:48,184 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-06-06 00:27:48,427 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-06 00:27:48,801 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-06-06 00:27:49,415 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-06 00:27:49,724 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-06-06 00:27:49,884 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-06 00:27:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:49,971 INFO L93 Difference]: Finished difference Result 2842 states and 9155 transitions. [2021-06-06 00:27:49,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:27:49,971 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:49,975 INFO L225 Difference]: With dead ends: 2842 [2021-06-06 00:27:49,975 INFO L226 Difference]: Without dead ends: 2797 [2021-06-06 00:27:49,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3004.1ms TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:27:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-06-06 00:27:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 1705. [2021-06-06 00:27:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.380868544600939) internal successors, (5761), 1704 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5761 transitions. [2021-06-06 00:27:49,998 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5761 transitions. Word has length 26 [2021-06-06 00:27:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:49,998 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5761 transitions. [2021-06-06 00:27:49,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:49,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5761 transitions. [2021-06-06 00:27:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:50,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:50,000 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:50,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:50,201 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:50,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-06-06 00:27:50,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:50,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227766438] [2021-06-06 00:27:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:50,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:50,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227766438] [2021-06-06 00:27:50,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227766438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:50,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491432377] [2021-06-06 00:27:50,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:50,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:50,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:50,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:27:50,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:50,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:50,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:50,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:50,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:50,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-06 00:27:50,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:50,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:50,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:50,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:10 [2021-06-06 00:27:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:50,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491432377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:50,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:50,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:27:50,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590179575] [2021-06-06 00:27:50,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:50,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:50,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:50,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:50,587 INFO L87 Difference]: Start difference. First operand 1705 states and 5761 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:52,002 INFO L93 Difference]: Finished difference Result 2158 states and 7106 transitions. [2021-06-06 00:27:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:27:52,002 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:52,005 INFO L225 Difference]: With dead ends: 2158 [2021-06-06 00:27:52,005 INFO L226 Difference]: Without dead ends: 2143 [2021-06-06 00:27:52,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1305.6ms TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:27:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-06-06 00:27:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1709. [2021-06-06 00:27:52,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.3811475409836067) internal successors, (5775), 1708 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5775 transitions. [2021-06-06 00:27:52,025 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5775 transitions. Word has length 26 [2021-06-06 00:27:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:52,025 INFO L482 AbstractCegarLoop]: Abstraction has 1709 states and 5775 transitions. [2021-06-06 00:27:52,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5775 transitions. [2021-06-06 00:27:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:52,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:52,027 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:52,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-06 00:27:52,227 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:52,228 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-06-06 00:27:52,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:52,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55824957] [2021-06-06 00:27:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:52,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:52,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55824957] [2021-06-06 00:27:52,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55824957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:52,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962858724] [2021-06-06 00:27:52,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:52,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:27:52,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:27:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:52,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:52,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:52,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-06 00:27:52,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:27:52,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:52,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:52,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-06 00:27:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:52,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962858724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:52,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:52,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-06 00:27:52,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565329525] [2021-06-06 00:27:52,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:27:52,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:52,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:27:52,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:27:52,726 INFO L87 Difference]: Start difference. First operand 1709 states and 5775 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:53,955 INFO L93 Difference]: Finished difference Result 2441 states and 8075 transitions. [2021-06-06 00:27:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:27:53,956 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:53,959 INFO L225 Difference]: With dead ends: 2441 [2021-06-06 00:27:53,959 INFO L226 Difference]: Without dead ends: 2426 [2021-06-06 00:27:53,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 993.2ms TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:53,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-06 00:27:53,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1709. [2021-06-06 00:27:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.3811475409836067) internal successors, (5775), 1708 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:53,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5775 transitions. [2021-06-06 00:27:53,982 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5775 transitions. Word has length 26 [2021-06-06 00:27:53,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:53,982 INFO L482 AbstractCegarLoop]: Abstraction has 1709 states and 5775 transitions. [2021-06-06 00:27:53,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:53,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5775 transitions. [2021-06-06 00:27:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:53,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:53,984 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:54,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-06 00:27:54,185 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:54,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:54,185 INFO L82 PathProgramCache]: Analyzing trace with hash 370367166, now seen corresponding path program 54 times [2021-06-06 00:27:54,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:54,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633944261] [2021-06-06 00:27:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:54,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:54,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633944261] [2021-06-06 00:27:54,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633944261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:54,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539979626] [2021-06-06 00:27:54,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:54,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:27:54,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:54,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:27:54,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:54,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:54,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:54,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:27:54,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:27:54,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:54,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:54,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:54,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:27:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:54,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539979626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:54,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:54,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:27:54,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745260819] [2021-06-06 00:27:54,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:27:54,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:54,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:27:54,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:27:54,591 INFO L87 Difference]: Start difference. First operand 1709 states and 5775 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:55,342 INFO L93 Difference]: Finished difference Result 2137 states and 7029 transitions. [2021-06-06 00:27:55,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:27:55,343 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:55,345 INFO L225 Difference]: With dead ends: 2137 [2021-06-06 00:27:55,345 INFO L226 Difference]: Without dead ends: 2118 [2021-06-06 00:27:55,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 784.1ms TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:27:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-06-06 00:27:55,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1703. [2021-06-06 00:27:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.380728554641598) internal successors, (5754), 1702 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5754 transitions. [2021-06-06 00:27:55,365 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5754 transitions. Word has length 26 [2021-06-06 00:27:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:55,365 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5754 transitions. [2021-06-06 00:27:55,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5754 transitions. [2021-06-06 00:27:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:55,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:55,367 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:55,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:55,568 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:55,568 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 55 times [2021-06-06 00:27:55,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:55,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118169954] [2021-06-06 00:27:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:55,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:55,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118169954] [2021-06-06 00:27:55,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118169954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:55,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307492677] [2021-06-06 00:27:55,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:55,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:27:55,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:55,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:55,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:27:55,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:55,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-06 00:27:55,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:27:55,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:55,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:55,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-06-06 00:27:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:55,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307492677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:55,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:55,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-06 00:27:55,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776465584] [2021-06-06 00:27:55,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:27:55,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:55,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:27:55,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:27:55,995 INFO L87 Difference]: Start difference. First operand 1703 states and 5754 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:57,845 INFO L93 Difference]: Finished difference Result 2951 states and 9376 transitions. [2021-06-06 00:27:57,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:27:57,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:57,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:57,849 INFO L225 Difference]: With dead ends: 2951 [2021-06-06 00:27:57,849 INFO L226 Difference]: Without dead ends: 2932 [2021-06-06 00:27:57,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1661.9ms TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:27:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-06-06 00:27:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 1697. [2021-06-06 00:27:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.3767688679245285) internal successors, (5727), 1696 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5727 transitions. [2021-06-06 00:27:57,880 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5727 transitions. Word has length 26 [2021-06-06 00:27:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:57,880 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 5727 transitions. [2021-06-06 00:27:57,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:57,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5727 transitions. [2021-06-06 00:27:57,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:57,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:57,882 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:58,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:58,083 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:58,083 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 36 times [2021-06-06 00:27:58,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:58,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176375365] [2021-06-06 00:27:58,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:58,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:58,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176375365] [2021-06-06 00:27:58,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176375365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:58,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159775477] [2021-06-06 00:27:58,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:58,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:27:58,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:27:58,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:58,373 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-06 00:27:58,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-06-06 00:27:58,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:58,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:58,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:58,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:49 [2021-06-06 00:27:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:58,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159775477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:58,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:58,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:27:58,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856115138] [2021-06-06 00:27:58,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:27:58,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:58,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:27:58,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:27:58,426 INFO L87 Difference]: Start difference. First operand 1697 states and 5727 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:59,715 INFO L93 Difference]: Finished difference Result 2361 states and 7668 transitions. [2021-06-06 00:27:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:27:59,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:27:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:59,719 INFO L225 Difference]: With dead ends: 2361 [2021-06-06 00:27:59,719 INFO L226 Difference]: Without dead ends: 2331 [2021-06-06 00:27:59,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 954.4ms TimeCoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:27:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-06 00:27:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1708. [2021-06-06 00:27:59,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.3807850029291155) internal successors, (5771), 1707 states have internal predecessors, (5771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:59,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5771 transitions. [2021-06-06 00:27:59,740 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5771 transitions. Word has length 26 [2021-06-06 00:27:59,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:59,740 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5771 transitions. [2021-06-06 00:27:59,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:59,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5771 transitions. [2021-06-06 00:27:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:27:59,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:59,742 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:59,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-06 00:27:59,954 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:59,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:59,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 37 times [2021-06-06 00:27:59,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:59,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916840410] [2021-06-06 00:27:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:00,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:00,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916840410] [2021-06-06 00:28:00,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916840410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:00,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948821421] [2021-06-06 00:28:00,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:00,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:00,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:00,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:00,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:00,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-06-06 00:28:00,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:28:00,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:00,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:00,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-06 00:28:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:00,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948821421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:00,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:00,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:00,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164665246] [2021-06-06 00:28:00,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:00,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:00,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:00,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:00,262 INFO L87 Difference]: Start difference. First operand 1708 states and 5771 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:01,060 INFO L93 Difference]: Finished difference Result 2199 states and 7281 transitions. [2021-06-06 00:28:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:28:01,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:01,063 INFO L225 Difference]: With dead ends: 2199 [2021-06-06 00:28:01,063 INFO L226 Difference]: Without dead ends: 2184 [2021-06-06 00:28:01,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 660.4ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:28:01,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-06 00:28:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1697. [2021-06-06 00:28:01,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.3838443396226414) internal successors, (5739), 1696 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5739 transitions. [2021-06-06 00:28:01,084 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5739 transitions. Word has length 26 [2021-06-06 00:28:01,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:01,084 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 5739 transitions. [2021-06-06 00:28:01,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5739 transitions. [2021-06-06 00:28:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:01,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:01,086 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:01,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:01,286 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:01,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:01,286 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 38 times [2021-06-06 00:28:01,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:01,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392330768] [2021-06-06 00:28:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:01,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:01,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392330768] [2021-06-06 00:28:01,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392330768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:01,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491881481] [2021-06-06 00:28:01,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:01,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:01,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:01,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:01,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:01,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:01,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:01,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:28:01,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:01,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:01,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:01,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-06 00:28:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:01,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491881481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:01,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:01,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:28:01,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285130822] [2021-06-06 00:28:01,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:01,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:01,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:01,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:01,620 INFO L87 Difference]: Start difference. First operand 1697 states and 5739 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:02,199 INFO L93 Difference]: Finished difference Result 2365 states and 7781 transitions. [2021-06-06 00:28:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:28:02,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:02,203 INFO L225 Difference]: With dead ends: 2365 [2021-06-06 00:28:02,203 INFO L226 Difference]: Without dead ends: 2350 [2021-06-06 00:28:02,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 515.0ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:28:02,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-06-06 00:28:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1689. [2021-06-06 00:28:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 3.382701421800948) internal successors, (5710), 1688 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 5710 transitions. [2021-06-06 00:28:02,224 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 5710 transitions. Word has length 26 [2021-06-06 00:28:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:02,224 INFO L482 AbstractCegarLoop]: Abstraction has 1689 states and 5710 transitions. [2021-06-06 00:28:02,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 5710 transitions. [2021-06-06 00:28:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:02,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:02,226 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:02,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:02,426 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:02,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:02,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 39 times [2021-06-06 00:28:02,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:02,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069216527] [2021-06-06 00:28:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:02,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:02,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069216527] [2021-06-06 00:28:02,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069216527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:02,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362502884] [2021-06-06 00:28:02,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:02,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:28:02,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:02,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:28:02,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:02,698 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-06 00:28:02,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-06 00:28:02,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:02,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:02,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:02,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-06-06 00:28:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:02,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362502884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:02,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:02,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:28:02,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277677965] [2021-06-06 00:28:02,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:02,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:02,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:02,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:02,746 INFO L87 Difference]: Start difference. First operand 1689 states and 5710 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:03,433 INFO L93 Difference]: Finished difference Result 2545 states and 8378 transitions. [2021-06-06 00:28:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:28:03,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:03,437 INFO L225 Difference]: With dead ends: 2545 [2021-06-06 00:28:03,437 INFO L226 Difference]: Without dead ends: 2530 [2021-06-06 00:28:03,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 642.8ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:28:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-06 00:28:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1683. [2021-06-06 00:28:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.3787158145065397) internal successors, (5683), 1682 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5683 transitions. [2021-06-06 00:28:03,461 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5683 transitions. Word has length 26 [2021-06-06 00:28:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:03,461 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5683 transitions. [2021-06-06 00:28:03,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:03,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5683 transitions. [2021-06-06 00:28:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:03,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:03,463 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:03,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:03,664 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:03,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:03,664 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 40 times [2021-06-06 00:28:03,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:03,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776158006] [2021-06-06 00:28:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:03,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:03,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776158006] [2021-06-06 00:28:03,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776158006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:03,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142088799] [2021-06-06 00:28:03,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:03,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:03,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:03,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:03,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:03,974 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-06 00:28:03,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-06-06 00:28:03,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:03,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:03,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:03,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-06-06 00:28:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:03,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142088799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:03,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:03,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:03,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925992963] [2021-06-06 00:28:03,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:03,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:03,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:03,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:03,995 INFO L87 Difference]: Start difference. First operand 1683 states and 5683 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:04,593 INFO L93 Difference]: Finished difference Result 2243 states and 7363 transitions. [2021-06-06 00:28:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:28:04,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:04,597 INFO L225 Difference]: With dead ends: 2243 [2021-06-06 00:28:04,597 INFO L226 Difference]: Without dead ends: 2218 [2021-06-06 00:28:04,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 529.7ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:28:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-06-06 00:28:04,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1692. [2021-06-06 00:28:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.3820224719101124) internal successors, (5719), 1691 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5719 transitions. [2021-06-06 00:28:04,620 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5719 transitions. Word has length 26 [2021-06-06 00:28:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:04,621 INFO L482 AbstractCegarLoop]: Abstraction has 1692 states and 5719 transitions. [2021-06-06 00:28:04,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:04,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5719 transitions. [2021-06-06 00:28:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:04,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:04,623 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:04,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-06 00:28:04,837 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1571862210, now seen corresponding path program 41 times [2021-06-06 00:28:04,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:04,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459029383] [2021-06-06 00:28:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:04,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:04,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459029383] [2021-06-06 00:28:04,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459029383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:04,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040389727] [2021-06-06 00:28:04,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:04,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:28:04,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:04,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:04,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:05,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:05,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:05,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-06 00:28:05,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:28:05,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:05,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:05,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-06 00:28:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:05,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040389727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:05,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:05,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:28:05,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103731656] [2021-06-06 00:28:05,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:05,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:05,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:05,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:05,162 INFO L87 Difference]: Start difference. First operand 1692 states and 5719 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:05,556 INFO L93 Difference]: Finished difference Result 2410 states and 7909 transitions. [2021-06-06 00:28:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:28:05,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:05,560 INFO L225 Difference]: With dead ends: 2410 [2021-06-06 00:28:05,560 INFO L226 Difference]: Without dead ends: 2385 [2021-06-06 00:28:05,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:28:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-06-06 00:28:05,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1674. [2021-06-06 00:28:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.3807531380753137) internal successors, (5656), 1673 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5656 transitions. [2021-06-06 00:28:05,582 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5656 transitions. Word has length 26 [2021-06-06 00:28:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:05,583 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5656 transitions. [2021-06-06 00:28:05,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:05,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5656 transitions. [2021-06-06 00:28:05,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:05,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:05,585 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:05,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-06 00:28:05,797 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:05,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 42 times [2021-06-06 00:28:05,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:05,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341703256] [2021-06-06 00:28:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:05,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:05,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341703256] [2021-06-06 00:28:05,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341703256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:05,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769528373] [2021-06-06 00:28:05,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:05,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:28:05,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:05,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:28:05,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:06,082 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-06 00:28:06,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-06-06 00:28:06,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:06,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:06,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:06,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:78, output treesize:77 [2021-06-06 00:28:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:06,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769528373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:06,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:06,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:28:06,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253065175] [2021-06-06 00:28:06,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:28:06,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:06,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:28:06,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:28:06,211 INFO L87 Difference]: Start difference. First operand 1674 states and 5656 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:07,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:07,161 INFO L93 Difference]: Finished difference Result 2335 states and 7668 transitions. [2021-06-06 00:28:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:28:07,161 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:07,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:07,164 INFO L225 Difference]: With dead ends: 2335 [2021-06-06 00:28:07,164 INFO L226 Difference]: Without dead ends: 2310 [2021-06-06 00:28:07,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:28:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-06 00:28:07,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1662. [2021-06-06 00:28:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.3798916315472605) internal successors, (5614), 1661 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5614 transitions. [2021-06-06 00:28:07,192 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5614 transitions. Word has length 26 [2021-06-06 00:28:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:07,192 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5614 transitions. [2021-06-06 00:28:07,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5614 transitions. [2021-06-06 00:28:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:07,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:07,195 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:07,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-06 00:28:07,395 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash 518793590, now seen corresponding path program 43 times [2021-06-06 00:28:07,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:07,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540403243] [2021-06-06 00:28:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:07,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:07,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540403243] [2021-06-06 00:28:07,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540403243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:07,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910070015] [2021-06-06 00:28:07,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:07,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:07,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:07,692 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-06-06 00:28:07,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 52 [2021-06-06 00:28:07,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:07,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:07,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:07,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:22 [2021-06-06 00:28:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:07,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910070015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:07,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:07,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:07,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789502144] [2021-06-06 00:28:07,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:07,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:07,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:07,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:07,758 INFO L87 Difference]: Start difference. First operand 1662 states and 5614 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:08,501 INFO L93 Difference]: Finished difference Result 2261 states and 7456 transitions. [2021-06-06 00:28:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:28:08,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:08,504 INFO L225 Difference]: With dead ends: 2261 [2021-06-06 00:28:08,504 INFO L226 Difference]: Without dead ends: 2242 [2021-06-06 00:28:08,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 671.4ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:28:08,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-06 00:28:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1649. [2021-06-06 00:28:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.3780339805825244) internal successors, (5567), 1648 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5567 transitions. [2021-06-06 00:28:08,531 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5567 transitions. Word has length 26 [2021-06-06 00:28:08,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:08,531 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5567 transitions. [2021-06-06 00:28:08,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5567 transitions. [2021-06-06 00:28:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:08,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:08,533 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:08,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:08,734 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:08,734 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 44 times [2021-06-06 00:28:08,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:08,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498716279] [2021-06-06 00:28:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:08,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:08,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498716279] [2021-06-06 00:28:08,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498716279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:08,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852138702] [2021-06-06 00:28:08,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:08,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:08,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:08,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:09,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:09,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:09,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:28:09,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:09,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:09,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:09,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:28:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:09,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852138702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:09,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:09,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:09,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253194380] [2021-06-06 00:28:09,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:09,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:09,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:09,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:09,031 INFO L87 Difference]: Start difference. First operand 1649 states and 5567 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:09,516 INFO L93 Difference]: Finished difference Result 2219 states and 7297 transitions. [2021-06-06 00:28:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:28:09,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:09,519 INFO L225 Difference]: With dead ends: 2219 [2021-06-06 00:28:09,519 INFO L226 Difference]: Without dead ends: 2204 [2021-06-06 00:28:09,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 488.1ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:28:09,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-06 00:28:09,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1700. [2021-06-06 00:28:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.3737492642731017) internal successors, (5732), 1699 states have internal predecessors, (5732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5732 transitions. [2021-06-06 00:28:09,539 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5732 transitions. Word has length 26 [2021-06-06 00:28:09,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:09,539 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 5732 transitions. [2021-06-06 00:28:09,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:09,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5732 transitions. [2021-06-06 00:28:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:09,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:09,541 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:09,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-06 00:28:09,742 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:09,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 45 times [2021-06-06 00:28:09,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:09,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663255624] [2021-06-06 00:28:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:09,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:09,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663255624] [2021-06-06 00:28:09,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663255624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:09,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946215039] [2021-06-06 00:28:09,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:09,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:28:09,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:09,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:09,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:10,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:10,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:10,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-06 00:28:10,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:10,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:10,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:28:10,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-06 00:28:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:10,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946215039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:10,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:10,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:28:10,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198812558] [2021-06-06 00:28:10,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:10,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:10,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:10,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:10,145 INFO L87 Difference]: Start difference. First operand 1700 states and 5732 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:10,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:10,551 INFO L93 Difference]: Finished difference Result 2458 states and 8075 transitions. [2021-06-06 00:28:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:28:10,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:10,554 INFO L225 Difference]: With dead ends: 2458 [2021-06-06 00:28:10,554 INFO L226 Difference]: Without dead ends: 2443 [2021-06-06 00:28:10,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 484.2ms TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:28:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-06 00:28:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1695. [2021-06-06 00:28:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.374852420306966) internal successors, (5717), 1694 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:10,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5717 transitions. [2021-06-06 00:28:10,576 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5717 transitions. Word has length 26 [2021-06-06 00:28:10,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:10,576 INFO L482 AbstractCegarLoop]: Abstraction has 1695 states and 5717 transitions. [2021-06-06 00:28:10,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:10,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5717 transitions. [2021-06-06 00:28:10,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:10,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:10,578 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:10,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:10,793 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:10,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:10,793 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 46 times [2021-06-06 00:28:10,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:10,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311594109] [2021-06-06 00:28:10,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:10,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:10,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311594109] [2021-06-06 00:28:10,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311594109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:10,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521722898] [2021-06-06 00:28:10,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:10,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:10,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:10,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:10,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:11,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:11,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:11,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:28:11,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:11,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:11,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:11,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-06 00:28:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:11,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521722898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:11,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:11,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:11,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147875598] [2021-06-06 00:28:11,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:11,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:11,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:11,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:11,122 INFO L87 Difference]: Start difference. First operand 1695 states and 5717 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:11,516 INFO L93 Difference]: Finished difference Result 2251 states and 7431 transitions. [2021-06-06 00:28:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:28:11,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:11,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:11,519 INFO L225 Difference]: With dead ends: 2251 [2021-06-06 00:28:11,519 INFO L226 Difference]: Without dead ends: 2236 [2021-06-06 00:28:11,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 436.1ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:28:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-06-06 00:28:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1698. [2021-06-06 00:28:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 3.3783146729522686) internal successors, (5733), 1697 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 5733 transitions. [2021-06-06 00:28:11,539 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 5733 transitions. Word has length 26 [2021-06-06 00:28:11,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:11,539 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 5733 transitions. [2021-06-06 00:28:11,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:11,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 5733 transitions. [2021-06-06 00:28:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:11,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:11,541 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:11,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-06 00:28:11,742 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:11,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:11,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 47 times [2021-06-06 00:28:11,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:11,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265836799] [2021-06-06 00:28:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:11,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:11,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265836799] [2021-06-06 00:28:11,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265836799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:11,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032145243] [2021-06-06 00:28:11,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:11,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:28:11,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:11,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:11,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:12,004 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-06 00:28:12,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-06-06 00:28:12,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:12,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:12,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:12,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-06-06 00:28:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:12,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032145243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:12,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:12,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:12,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714631635] [2021-06-06 00:28:12,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:12,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:12,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:12,035 INFO L87 Difference]: Start difference. First operand 1698 states and 5733 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:12,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:12,486 INFO L93 Difference]: Finished difference Result 2287 states and 7544 transitions. [2021-06-06 00:28:12,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:28:12,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:12,489 INFO L225 Difference]: With dead ends: 2287 [2021-06-06 00:28:12,489 INFO L226 Difference]: Without dead ends: 2272 [2021-06-06 00:28:12,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:28:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-06-06 00:28:12,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1716. [2021-06-06 00:28:12,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.3743440233236153) internal successors, (5787), 1715 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5787 transitions. [2021-06-06 00:28:12,509 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5787 transitions. Word has length 26 [2021-06-06 00:28:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:12,509 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5787 transitions. [2021-06-06 00:28:12,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:12,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5787 transitions. [2021-06-06 00:28:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:12,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:12,511 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:12,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-06 00:28:12,711 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:12,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:12,712 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 48 times [2021-06-06 00:28:12,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:12,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700574954] [2021-06-06 00:28:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:12,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:12,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700574954] [2021-06-06 00:28:12,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700574954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:12,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546864073] [2021-06-06 00:28:12,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:12,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:28:12,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:12,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:12,955 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-06 00:28:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-06 00:28:12,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:12,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:12,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:12,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-06-06 00:28:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:12,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546864073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:12,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:12,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:12,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799926923] [2021-06-06 00:28:12,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:12,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:12,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:12,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:12,996 INFO L87 Difference]: Start difference. First operand 1716 states and 5787 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:13,740 INFO L93 Difference]: Finished difference Result 2276 states and 7538 transitions. [2021-06-06 00:28:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:28:13,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:13,743 INFO L225 Difference]: With dead ends: 2276 [2021-06-06 00:28:13,744 INFO L226 Difference]: Without dead ends: 2261 [2021-06-06 00:28:13,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 593.2ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:28:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-06-06 00:28:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1734. [2021-06-06 00:28:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3721869590305826) internal successors, (5844), 1733 states have internal predecessors, (5844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:13,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5844 transitions. [2021-06-06 00:28:13,764 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5844 transitions. Word has length 26 [2021-06-06 00:28:13,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:13,764 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5844 transitions. [2021-06-06 00:28:13,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5844 transitions. [2021-06-06 00:28:13,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:13,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:13,766 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:13,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-06 00:28:13,969 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:13,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:13,969 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 49 times [2021-06-06 00:28:13,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:13,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597721014] [2021-06-06 00:28:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:14,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:14,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597721014] [2021-06-06 00:28:14,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597721014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:14,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127243957] [2021-06-06 00:28:14,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:14,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:14,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:14,238 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-06 00:28:14,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 54 [2021-06-06 00:28:14,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:14,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:14,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:28:14,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:67 [2021-06-06 00:28:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:14,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127243957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:14,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:14,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:28:14,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683594000] [2021-06-06 00:28:14,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:14,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:14,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:14,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:14,324 INFO L87 Difference]: Start difference. First operand 1734 states and 5844 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:14,740 INFO L93 Difference]: Finished difference Result 2329 states and 7683 transitions. [2021-06-06 00:28:14,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:28:14,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:14,744 INFO L225 Difference]: With dead ends: 2329 [2021-06-06 00:28:14,744 INFO L226 Difference]: Without dead ends: 2304 [2021-06-06 00:28:14,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:28:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-06-06 00:28:14,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 1734. [2021-06-06 00:28:14,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3744950952106176) internal successors, (5848), 1733 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:14,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5848 transitions. [2021-06-06 00:28:14,766 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5848 transitions. Word has length 26 [2021-06-06 00:28:14,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:14,766 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5848 transitions. [2021-06-06 00:28:14,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5848 transitions. [2021-06-06 00:28:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:14,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:14,768 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:14,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-06 00:28:14,983 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 50 times [2021-06-06 00:28:14,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:14,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046847322] [2021-06-06 00:28:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:15,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:15,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046847322] [2021-06-06 00:28:15,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046847322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:15,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869708202] [2021-06-06 00:28:15,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:15,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:15,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:15,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:15,269 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-06 00:28:15,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-06 00:28:15,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:15,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:15,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:15,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-06-06 00:28:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:15,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869708202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:15,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:15,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:15,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806382243] [2021-06-06 00:28:15,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:15,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:15,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:15,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:15,314 INFO L87 Difference]: Start difference. First operand 1734 states and 5848 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:15,740 INFO L93 Difference]: Finished difference Result 2281 states and 7556 transitions. [2021-06-06 00:28:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:28:15,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:15,743 INFO L225 Difference]: With dead ends: 2281 [2021-06-06 00:28:15,743 INFO L226 Difference]: Without dead ends: 2266 [2021-06-06 00:28:15,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 442.3ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:28:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-06-06 00:28:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1734. [2021-06-06 00:28:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3744950952106176) internal successors, (5848), 1733 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5848 transitions. [2021-06-06 00:28:15,763 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5848 transitions. Word has length 26 [2021-06-06 00:28:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:15,763 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5848 transitions. [2021-06-06 00:28:15,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5848 transitions. [2021-06-06 00:28:15,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:15,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:15,766 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:15,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:15,966 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1909155608, now seen corresponding path program 56 times [2021-06-06 00:28:15,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:15,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444885303] [2021-06-06 00:28:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:16,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:16,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444885303] [2021-06-06 00:28:16,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444885303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:16,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183543516] [2021-06-06 00:28:16,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:16,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:16,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:16,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-06 00:28:16,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:16,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:16,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:16,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:16,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:16,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-06-06 00:28:16,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:16,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:16,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:16,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:15 [2021-06-06 00:28:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:16,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183543516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:16,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:16,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:28:16,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816058072] [2021-06-06 00:28:16,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:16,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:16,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:16,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:16,364 INFO L87 Difference]: Start difference. First operand 1734 states and 5848 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:16,813 INFO L93 Difference]: Finished difference Result 2265 states and 7364 transitions. [2021-06-06 00:28:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:28:16,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:16,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:16,816 INFO L225 Difference]: With dead ends: 2265 [2021-06-06 00:28:16,816 INFO L226 Difference]: Without dead ends: 2220 [2021-06-06 00:28:16,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 532.9ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:28:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-06 00:28:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1752. [2021-06-06 00:28:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.366647629925757) internal successors, (5895), 1751 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5895 transitions. [2021-06-06 00:28:16,836 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5895 transitions. Word has length 26 [2021-06-06 00:28:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:16,836 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5895 transitions. [2021-06-06 00:28:16,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5895 transitions. [2021-06-06 00:28:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:16,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:16,838 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:17,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:17,039 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:17,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1847280054, now seen corresponding path program 57 times [2021-06-06 00:28:17,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:17,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337068896] [2021-06-06 00:28:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:17,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:17,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337068896] [2021-06-06 00:28:17,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337068896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:17,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046536243] [2021-06-06 00:28:17,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:17,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:28:17,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:17,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:17,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:17,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:17,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:17,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:17,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:17,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-06 00:28:17,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:28:17,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:17,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:17,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:33 [2021-06-06 00:28:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:17,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046536243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:17,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:17,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:17,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64775416] [2021-06-06 00:28:17,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:28:17,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:17,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:28:17,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:28:17,501 INFO L87 Difference]: Start difference. First operand 1752 states and 5895 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:19,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:19,001 INFO L93 Difference]: Finished difference Result 2446 states and 7986 transitions. [2021-06-06 00:28:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:28:19,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:19,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:19,005 INFO L225 Difference]: With dead ends: 2446 [2021-06-06 00:28:19,005 INFO L226 Difference]: Without dead ends: 2431 [2021-06-06 00:28:19,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1324.3ms TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:28:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-06-06 00:28:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1746. [2021-06-06 00:28:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 3.3650429799426935) internal successors, (5872), 1745 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5872 transitions. [2021-06-06 00:28:19,028 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5872 transitions. Word has length 26 [2021-06-06 00:28:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:19,028 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 5872 transitions. [2021-06-06 00:28:19,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5872 transitions. [2021-06-06 00:28:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:19,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:19,030 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:19,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-06 00:28:19,246 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:19,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:19,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 58 times [2021-06-06 00:28:19,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:19,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516692881] [2021-06-06 00:28:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:19,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:19,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516692881] [2021-06-06 00:28:19,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516692881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:19,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325009486] [2021-06-06 00:28:19,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:19,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:19,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:19,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:19,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:19,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:19,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:19,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:28:19,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:19,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:19,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:19,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:28:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:19,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325009486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:19,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:19,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-06 00:28:19,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722485164] [2021-06-06 00:28:19,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:28:19,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:19,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:28:19,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:28:19,621 INFO L87 Difference]: Start difference. First operand 1746 states and 5872 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:19,958 INFO L93 Difference]: Finished difference Result 2059 states and 6675 transitions. [2021-06-06 00:28:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:28:19,959 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:19,961 INFO L225 Difference]: With dead ends: 2059 [2021-06-06 00:28:19,961 INFO L226 Difference]: Without dead ends: 2037 [2021-06-06 00:28:19,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 390.3ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:28:19,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-06-06 00:28:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1748. [2021-06-06 00:28:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 3.36519748139668) internal successors, (5879), 1747 states have internal predecessors, (5879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 5879 transitions. [2021-06-06 00:28:19,982 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 5879 transitions. Word has length 26 [2021-06-06 00:28:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:19,982 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 5879 transitions. [2021-06-06 00:28:19,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:19,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 5879 transitions. [2021-06-06 00:28:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:19,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:19,985 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:20,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:20,186 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:20,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:20,186 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 59 times [2021-06-06 00:28:20,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:20,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449314069] [2021-06-06 00:28:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:20,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:20,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449314069] [2021-06-06 00:28:20,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449314069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:20,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201320469] [2021-06-06 00:28:20,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:20,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:28:20,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:20,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:20,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:20,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:20,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:20,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:20,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:20,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-06 00:28:20,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:28:20,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:20,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:20,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:33 [2021-06-06 00:28:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:20,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201320469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:20,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:20,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:20,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402688535] [2021-06-06 00:28:20,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:28:20,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:20,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:28:20,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:28:20,578 INFO L87 Difference]: Start difference. First operand 1748 states and 5879 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:21,441 INFO L93 Difference]: Finished difference Result 2318 states and 7610 transitions. [2021-06-06 00:28:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:28:21,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:21,444 INFO L225 Difference]: With dead ends: 2318 [2021-06-06 00:28:21,444 INFO L226 Difference]: Without dead ends: 2276 [2021-06-06 00:28:21,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 749.9ms TimeCoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:28:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-06 00:28:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1772. [2021-06-06 00:28:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.3585544889892716) internal successors, (5948), 1771 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 5948 transitions. [2021-06-06 00:28:21,465 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 5948 transitions. Word has length 26 [2021-06-06 00:28:21,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:21,465 INFO L482 AbstractCegarLoop]: Abstraction has 1772 states and 5948 transitions. [2021-06-06 00:28:21,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:21,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 5948 transitions. [2021-06-06 00:28:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:21,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:21,467 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:21,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:21,668 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:21,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:21,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1162419966, now seen corresponding path program 60 times [2021-06-06 00:28:21,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:21,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582884403] [2021-06-06 00:28:21,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:21,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:21,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582884403] [2021-06-06 00:28:21,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582884403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:21,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5613096] [2021-06-06 00:28:21,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:21,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:28:21,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:21,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:21,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:21,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:21,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:21,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:28:21,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:21,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:21,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:21,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:28:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:21,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5613096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:21,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:21,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-06 00:28:21,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397389080] [2021-06-06 00:28:21,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:28:21,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:21,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:28:21,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:28:21,995 INFO L87 Difference]: Start difference. First operand 1772 states and 5948 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:22,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:22,501 INFO L93 Difference]: Finished difference Result 2209 states and 7265 transitions. [2021-06-06 00:28:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:28:22,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:22,504 INFO L225 Difference]: With dead ends: 2209 [2021-06-06 00:28:22,504 INFO L226 Difference]: Without dead ends: 2178 [2021-06-06 00:28:22,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:28:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-06-06 00:28:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1768. [2021-06-06 00:28:22,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.3604980192416525) internal successors, (5938), 1767 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5938 transitions. [2021-06-06 00:28:22,524 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5938 transitions. Word has length 26 [2021-06-06 00:28:22,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:22,524 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5938 transitions. [2021-06-06 00:28:22,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:22,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5938 transitions. [2021-06-06 00:28:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:22,526 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:22,526 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:22,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:22,727 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:22,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:22,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 61 times [2021-06-06 00:28:22,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:22,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476802259] [2021-06-06 00:28:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:22,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:22,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476802259] [2021-06-06 00:28:22,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476802259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:22,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291614224] [2021-06-06 00:28:22,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:22,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:22,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:23,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:23,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:23,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:23,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:28:23,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:23,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:23,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:23,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:28:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:23,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291614224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:23,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:23,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-06 00:28:23,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770520354] [2021-06-06 00:28:23,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:28:23,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:23,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:28:23,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:28:23,031 INFO L87 Difference]: Start difference. First operand 1768 states and 5938 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:23,369 INFO L93 Difference]: Finished difference Result 2198 states and 7242 transitions. [2021-06-06 00:28:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:28:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:23,371 INFO L225 Difference]: With dead ends: 2198 [2021-06-06 00:28:23,372 INFO L226 Difference]: Without dead ends: 2183 [2021-06-06 00:28:23,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 411.0ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:28:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-06-06 00:28:23,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 1768. [2021-06-06 00:28:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.3604980192416525) internal successors, (5938), 1767 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5938 transitions. [2021-06-06 00:28:23,392 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5938 transitions. Word has length 26 [2021-06-06 00:28:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:23,392 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5938 transitions. [2021-06-06 00:28:23,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5938 transitions. [2021-06-06 00:28:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:23,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:23,394 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:23,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-06 00:28:23,595 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:23,595 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 51 times [2021-06-06 00:28:23,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:23,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85772414] [2021-06-06 00:28:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:23,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:23,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85772414] [2021-06-06 00:28:23,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85772414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:23,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984989795] [2021-06-06 00:28:23,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:23,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:28:23,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:23,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:23,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:23,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:23,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:23,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:28:24,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:24,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:24,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:24,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-06 00:28:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:24,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984989795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:24,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:24,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:28:24,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663022020] [2021-06-06 00:28:24,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:28:24,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:24,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:28:24,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:28:24,021 INFO L87 Difference]: Start difference. First operand 1768 states and 5938 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:24,840 INFO L93 Difference]: Finished difference Result 2386 states and 7756 transitions. [2021-06-06 00:28:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:28:24,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:24,843 INFO L225 Difference]: With dead ends: 2386 [2021-06-06 00:28:24,843 INFO L226 Difference]: Without dead ends: 2371 [2021-06-06 00:28:24,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 682.7ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:28:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-06-06 00:28:24,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1779. [2021-06-06 00:28:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 3.361079865016873) internal successors, (5976), 1778 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 5976 transitions. [2021-06-06 00:28:24,863 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 5976 transitions. Word has length 26 [2021-06-06 00:28:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:24,864 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 5976 transitions. [2021-06-06 00:28:24,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 5976 transitions. [2021-06-06 00:28:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:24,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:24,866 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:25,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:25,081 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:25,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:25,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 62 times [2021-06-06 00:28:25,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:25,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163070195] [2021-06-06 00:28:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:25,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:25,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163070195] [2021-06-06 00:28:25,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163070195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:25,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372827074] [2021-06-06 00:28:25,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:25,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:25,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:25,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:25,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:25,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:25,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:25,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:25,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:28:25,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:25,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:25,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:25,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:28:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:25,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372827074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:25,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:25,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:28:25,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126246080] [2021-06-06 00:28:25,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:28:25,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:25,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:28:25,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:28:25,375 INFO L87 Difference]: Start difference. First operand 1779 states and 5976 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:26,068 INFO L93 Difference]: Finished difference Result 2670 states and 8464 transitions. [2021-06-06 00:28:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:28:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:26,072 INFO L225 Difference]: With dead ends: 2670 [2021-06-06 00:28:26,072 INFO L226 Difference]: Without dead ends: 2648 [2021-06-06 00:28:26,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 586.6ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:28:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-06 00:28:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1831. [2021-06-06 00:28:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.3666666666666667) internal successors, (6161), 1830 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6161 transitions. [2021-06-06 00:28:26,096 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6161 transitions. Word has length 26 [2021-06-06 00:28:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:26,096 INFO L482 AbstractCegarLoop]: Abstraction has 1831 states and 6161 transitions. [2021-06-06 00:28:26,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6161 transitions. [2021-06-06 00:28:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:26,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:26,098 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:26,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:26,298 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:26,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:26,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 52 times [2021-06-06 00:28:26,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:26,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74558819] [2021-06-06 00:28:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:26,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:26,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74558819] [2021-06-06 00:28:26,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74558819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:26,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441078520] [2021-06-06 00:28:26,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:26,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:26,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:26,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:26,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:26,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:26,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-06 00:28:26,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:26,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:26,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:26,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-06 00:28:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:26,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441078520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:26,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:26,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:28:26,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346622316] [2021-06-06 00:28:26,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:28:26,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:26,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:28:26,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:28:26,675 INFO L87 Difference]: Start difference. First operand 1831 states and 6161 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:27,657 INFO L93 Difference]: Finished difference Result 2547 states and 8275 transitions. [2021-06-06 00:28:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:28:27,658 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:27,661 INFO L225 Difference]: With dead ends: 2547 [2021-06-06 00:28:27,661 INFO L226 Difference]: Without dead ends: 2532 [2021-06-06 00:28:27,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 710.8ms TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:28:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-06 00:28:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1836. [2021-06-06 00:28:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 3.3678474114441417) internal successors, (6180), 1835 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 6180 transitions. [2021-06-06 00:28:27,683 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 6180 transitions. Word has length 26 [2021-06-06 00:28:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:27,683 INFO L482 AbstractCegarLoop]: Abstraction has 1836 states and 6180 transitions. [2021-06-06 00:28:27,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 6180 transitions. [2021-06-06 00:28:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:27,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:27,685 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:27,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:27,886 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:27,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:27,886 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 53 times [2021-06-06 00:28:27,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:27,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232612208] [2021-06-06 00:28:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:28,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:28,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232612208] [2021-06-06 00:28:28,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232612208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:28,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956326772] [2021-06-06 00:28:28,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:28,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:28:28,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:28,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:28:28,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:28,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:28,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:28,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-06 00:28:28,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:28:28,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:28,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:28,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-06 00:28:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:28,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956326772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:28,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:28,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:28:28,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054602721] [2021-06-06 00:28:28,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:28,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:28,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:28,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:28,200 INFO L87 Difference]: Start difference. First operand 1836 states and 6180 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:29,170 INFO L93 Difference]: Finished difference Result 2824 states and 9165 transitions. [2021-06-06 00:28:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:28:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:29,173 INFO L225 Difference]: With dead ends: 2824 [2021-06-06 00:28:29,173 INFO L226 Difference]: Without dead ends: 2809 [2021-06-06 00:28:29,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 749.2ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:28:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-06-06 00:28:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 1827. [2021-06-06 00:28:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.3663745892661554) internal successors, (6147), 1826 states have internal predecessors, (6147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6147 transitions. [2021-06-06 00:28:29,199 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6147 transitions. Word has length 26 [2021-06-06 00:28:29,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:29,199 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6147 transitions. [2021-06-06 00:28:29,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6147 transitions. [2021-06-06 00:28:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:29,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:29,201 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:29,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:29,401 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:29,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 63 times [2021-06-06 00:28:29,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:29,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743275984] [2021-06-06 00:28:29,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:29,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:29,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743275984] [2021-06-06 00:28:29,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743275984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:29,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61300248] [2021-06-06 00:28:29,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:29,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:28:29,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:29,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:29,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:29,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:29,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:29,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:29,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:29,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:28:29,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:29,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:29,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:29,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:28:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:29,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61300248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:29,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:29,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:28:29,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183860315] [2021-06-06 00:28:29,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:28:29,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:29,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:28:29,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:28:29,659 INFO L87 Difference]: Start difference. First operand 1827 states and 6147 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:30,395 INFO L93 Difference]: Finished difference Result 3158 states and 10100 transitions. [2021-06-06 00:28:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:28:30,395 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:30,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:30,399 INFO L225 Difference]: With dead ends: 3158 [2021-06-06 00:28:30,399 INFO L226 Difference]: Without dead ends: 3128 [2021-06-06 00:28:30,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 560.7ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:28:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states. [2021-06-06 00:28:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3128 to 1885. [2021-06-06 00:28:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.3694267515923566) internal successors, (6348), 1884 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6348 transitions. [2021-06-06 00:28:30,427 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6348 transitions. Word has length 26 [2021-06-06 00:28:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:30,427 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 6348 transitions. [2021-06-06 00:28:30,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6348 transitions. [2021-06-06 00:28:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:30,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:30,429 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:30,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:30,630 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 64 times [2021-06-06 00:28:30,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:30,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752094260] [2021-06-06 00:28:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:30,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:30,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752094260] [2021-06-06 00:28:30,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752094260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:30,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989524884] [2021-06-06 00:28:30,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:30,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:30,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:30,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:30,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:30,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:30,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:30,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:30,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-06 00:28:30,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:28:30,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:30,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:30,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-06 00:28:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:30,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989524884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:30,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:30,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:28:30,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16424438] [2021-06-06 00:28:30,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:28:30,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:30,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:28:30,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:28:30,926 INFO L87 Difference]: Start difference. First operand 1885 states and 6348 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:31,937 INFO L93 Difference]: Finished difference Result 3602 states and 11423 transitions. [2021-06-06 00:28:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:28:31,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:31,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:31,942 INFO L225 Difference]: With dead ends: 3602 [2021-06-06 00:28:31,942 INFO L226 Difference]: Without dead ends: 3558 [2021-06-06 00:28:31,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 857.9ms TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:28:31,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2021-06-06 00:28:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 1897. [2021-06-06 00:28:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 3.37289029535865) internal successors, (6395), 1896 states have internal predecessors, (6395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 6395 transitions. [2021-06-06 00:28:31,971 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 6395 transitions. Word has length 26 [2021-06-06 00:28:31,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:31,972 INFO L482 AbstractCegarLoop]: Abstraction has 1897 states and 6395 transitions. [2021-06-06 00:28:31,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 6395 transitions. [2021-06-06 00:28:31,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:31,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:31,974 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:32,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-06 00:28:32,174 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:32,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:32,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1345416738, now seen corresponding path program 54 times [2021-06-06 00:28:32,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:32,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073616687] [2021-06-06 00:28:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:32,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:32,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073616687] [2021-06-06 00:28:32,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073616687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:32,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476250497] [2021-06-06 00:28:32,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:32,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:28:32,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:32,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:32,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:32,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:32,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:32,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:32,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-06-06 00:28:32,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:28:32,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:32,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:32,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-06 00:28:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:32,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476250497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:32,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:32,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:32,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650475456] [2021-06-06 00:28:32,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:32,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:32,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:32,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:32,497 INFO L87 Difference]: Start difference. First operand 1897 states and 6395 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:33,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:33,649 INFO L93 Difference]: Finished difference Result 2547 states and 8408 transitions. [2021-06-06 00:28:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:28:33,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:33,652 INFO L225 Difference]: With dead ends: 2547 [2021-06-06 00:28:33,652 INFO L226 Difference]: Without dead ends: 2532 [2021-06-06 00:28:33,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 835.8ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:28:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-06 00:28:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1907. [2021-06-06 00:28:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 3.3698845750262327) internal successors, (6423), 1906 states have internal predecessors, (6423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 6423 transitions. [2021-06-06 00:28:33,675 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 6423 transitions. Word has length 26 [2021-06-06 00:28:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:33,675 INFO L482 AbstractCegarLoop]: Abstraction has 1907 states and 6423 transitions. [2021-06-06 00:28:33,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 6423 transitions. [2021-06-06 00:28:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:33,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:33,677 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:33,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable284 [2021-06-06 00:28:33,878 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:33,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 55 times [2021-06-06 00:28:33,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:33,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567755514] [2021-06-06 00:28:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:33,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:33,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567755514] [2021-06-06 00:28:33,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567755514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:33,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296424552] [2021-06-06 00:28:33,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:34,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:34,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:34,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:34,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:34,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-06 00:28:34,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:34,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:34,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:28:34,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-06 00:28:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:34,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296424552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:34,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:34,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:28:34,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810019186] [2021-06-06 00:28:34,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:28:34,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:34,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:28:34,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:28:34,217 INFO L87 Difference]: Start difference. First operand 1907 states and 6423 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:34,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:34,901 INFO L93 Difference]: Finished difference Result 2690 states and 8822 transitions. [2021-06-06 00:28:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:28:34,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:34,904 INFO L225 Difference]: With dead ends: 2690 [2021-06-06 00:28:34,904 INFO L226 Difference]: Without dead ends: 2665 [2021-06-06 00:28:34,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:28:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-06 00:28:34,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1893. [2021-06-06 00:28:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.374735729386892) internal successors, (6385), 1892 states have internal predecessors, (6385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6385 transitions. [2021-06-06 00:28:34,927 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6385 transitions. Word has length 26 [2021-06-06 00:28:34,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:34,927 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 6385 transitions. [2021-06-06 00:28:34,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6385 transitions. [2021-06-06 00:28:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:34,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:34,929 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:35,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:35,131 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:35,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:35,131 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 65 times [2021-06-06 00:28:35,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:35,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745125771] [2021-06-06 00:28:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:35,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:35,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745125771] [2021-06-06 00:28:35,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745125771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:35,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254978395] [2021-06-06 00:28:35,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:35,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:28:35,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:35,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:35,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:35,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:35,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:35,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:35,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:28:35,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:35,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:35,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:35,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:28:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:35,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254978395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:35,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:35,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:28:35,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700352252] [2021-06-06 00:28:35,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:28:35,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:35,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:28:35,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:28:35,475 INFO L87 Difference]: Start difference. First operand 1893 states and 6385 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:36,295 INFO L93 Difference]: Finished difference Result 2560 states and 8375 transitions. [2021-06-06 00:28:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:28:36,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:36,299 INFO L225 Difference]: With dead ends: 2560 [2021-06-06 00:28:36,299 INFO L226 Difference]: Without dead ends: 2538 [2021-06-06 00:28:36,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 762.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:28:36,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-06-06 00:28:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 1893. [2021-06-06 00:28:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.375264270613108) internal successors, (6386), 1892 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6386 transitions. [2021-06-06 00:28:36,322 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6386 transitions. Word has length 26 [2021-06-06 00:28:36,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:36,322 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 6386 transitions. [2021-06-06 00:28:36,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6386 transitions. [2021-06-06 00:28:36,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:36,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:36,324 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:36,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:36,525 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:36,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:36,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1778019666, now seen corresponding path program 66 times [2021-06-06 00:28:36,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:36,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246577088] [2021-06-06 00:28:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:36,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:36,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246577088] [2021-06-06 00:28:36,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246577088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:36,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414972807] [2021-06-06 00:28:36,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:36,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:28:36,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:36,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-06 00:28:36,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:36,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:36,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:36,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-06 00:28:36,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:28:36,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:36,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:36,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:26 [2021-06-06 00:28:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:36,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414972807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:36,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:36,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-06 00:28:36,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983828439] [2021-06-06 00:28:36,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:28:36,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:36,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:28:36,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:28:36,918 INFO L87 Difference]: Start difference. First operand 1893 states and 6386 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:38,592 INFO L93 Difference]: Finished difference Result 3121 states and 9982 transitions. [2021-06-06 00:28:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:28:38,592 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:38,596 INFO L225 Difference]: With dead ends: 3121 [2021-06-06 00:28:38,596 INFO L226 Difference]: Without dead ends: 3055 [2021-06-06 00:28:38,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1195.0ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:28:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-06-06 00:28:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 1882. [2021-06-06 00:28:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.3694843168527377) internal successors, (6338), 1881 states have internal predecessors, (6338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6338 transitions. [2021-06-06 00:28:38,625 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6338 transitions. Word has length 26 [2021-06-06 00:28:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:38,625 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 6338 transitions. [2021-06-06 00:28:38,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6338 transitions. [2021-06-06 00:28:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:38,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:38,627 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:38,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-06 00:28:38,843 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:38,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:38,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1066719206, now seen corresponding path program 56 times [2021-06-06 00:28:38,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:38,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986030480] [2021-06-06 00:28:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:38,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:38,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986030480] [2021-06-06 00:28:38,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986030480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:38,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159942325] [2021-06-06 00:28:38,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:39,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:39,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:39,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:39,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:39,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:39,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:39,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-06 00:28:39,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:28:39,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:39,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:39,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-06-06 00:28:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:39,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159942325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:39,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:39,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:39,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184162741] [2021-06-06 00:28:39,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:39,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:39,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:39,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:39,175 INFO L87 Difference]: Start difference. First operand 1882 states and 6338 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:40,065 INFO L93 Difference]: Finished difference Result 2561 states and 8454 transitions. [2021-06-06 00:28:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:28:40,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:40,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:40,069 INFO L225 Difference]: With dead ends: 2561 [2021-06-06 00:28:40,069 INFO L226 Difference]: Without dead ends: 2546 [2021-06-06 00:28:40,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 707.1ms TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:28:40,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-06-06 00:28:40,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1884. [2021-06-06 00:28:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.365374402549124) internal successors, (6337), 1883 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:40,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6337 transitions. [2021-06-06 00:28:40,094 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6337 transitions. Word has length 26 [2021-06-06 00:28:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:40,094 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6337 transitions. [2021-06-06 00:28:40,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:40,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6337 transitions. [2021-06-06 00:28:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:40,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:40,096 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:40,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:40,312 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:40,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 57 times [2021-06-06 00:28:40,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:40,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879681538] [2021-06-06 00:28:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:40,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:40,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879681538] [2021-06-06 00:28:40,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879681538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:40,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22387147] [2021-06-06 00:28:40,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:40,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:28:40,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:40,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:28:40,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:40,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:40,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:40,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-06 00:28:40,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:40,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:40,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:28:40,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:67 [2021-06-06 00:28:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:40,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22387147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:40,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:40,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:28:40,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812848176] [2021-06-06 00:28:40,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:40,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:40,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:40,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:40,739 INFO L87 Difference]: Start difference. First operand 1884 states and 6337 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:41,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:41,268 INFO L93 Difference]: Finished difference Result 2552 states and 8397 transitions. [2021-06-06 00:28:41,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:28:41,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:41,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:41,271 INFO L225 Difference]: With dead ends: 2552 [2021-06-06 00:28:41,271 INFO L226 Difference]: Without dead ends: 2527 [2021-06-06 00:28:41,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:28:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-06-06 00:28:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 1871. [2021-06-06 00:28:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.36524064171123) internal successors, (6293), 1870 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6293 transitions. [2021-06-06 00:28:41,295 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6293 transitions. Word has length 26 [2021-06-06 00:28:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:41,295 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6293 transitions. [2021-06-06 00:28:41,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6293 transitions. [2021-06-06 00:28:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:41,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:41,297 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:41,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-06 00:28:41,498 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:41,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:41,498 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-06-06 00:28:41,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:41,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806255417] [2021-06-06 00:28:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:41,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:41,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806255417] [2021-06-06 00:28:41,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806255417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:41,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405397776] [2021-06-06 00:28:41,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:41,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:41,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:41,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:28:41,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:41,773 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-06 00:28:41,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-06 00:28:41,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:41,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:41,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:41,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-06-06 00:28:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:41,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405397776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:41,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:41,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:28:41,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356499958] [2021-06-06 00:28:41,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:28:41,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:41,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:28:41,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:28:41,826 INFO L87 Difference]: Start difference. First operand 1871 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:42,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:42,312 INFO L93 Difference]: Finished difference Result 2462 states and 8140 transitions. [2021-06-06 00:28:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:28:42,312 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:42,315 INFO L225 Difference]: With dead ends: 2462 [2021-06-06 00:28:42,315 INFO L226 Difference]: Without dead ends: 2447 [2021-06-06 00:28:42,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:28:42,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-06 00:28:42,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1865. [2021-06-06 00:28:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 3.3664163090128754) internal successors, (6275), 1864 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 6275 transitions. [2021-06-06 00:28:42,337 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 6275 transitions. Word has length 26 [2021-06-06 00:28:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:42,337 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 6275 transitions. [2021-06-06 00:28:42,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 6275 transitions. [2021-06-06 00:28:42,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:42,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:42,339 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:42,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-06 00:28:42,539 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1210206466, now seen corresponding path program 67 times [2021-06-06 00:28:42,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:42,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111684834] [2021-06-06 00:28:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:42,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:42,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111684834] [2021-06-06 00:28:42,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111684834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:42,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057860192] [2021-06-06 00:28:42,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:42,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:42,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:42,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:42,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:28:42,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-06 00:28:42,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:42,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:42,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:42,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-06 00:28:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:42,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057860192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:42,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:42,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-06 00:28:42,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742494693] [2021-06-06 00:28:42,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:28:42,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:42,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:28:42,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:28:42,875 INFO L87 Difference]: Start difference. First operand 1865 states and 6275 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:43,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:43,547 INFO L93 Difference]: Finished difference Result 2375 states and 7798 transitions. [2021-06-06 00:28:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:28:43,548 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:43,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:43,550 INFO L225 Difference]: With dead ends: 2375 [2021-06-06 00:28:43,550 INFO L226 Difference]: Without dead ends: 2356 [2021-06-06 00:28:43,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 626.2ms TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:28:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-06-06 00:28:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1855. [2021-06-06 00:28:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 3.366774541531823) internal successors, (6242), 1854 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6242 transitions. [2021-06-06 00:28:43,572 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6242 transitions. Word has length 26 [2021-06-06 00:28:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:43,572 INFO L482 AbstractCegarLoop]: Abstraction has 1855 states and 6242 transitions. [2021-06-06 00:28:43,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6242 transitions. [2021-06-06 00:28:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:43,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:43,574 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:43,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-06 00:28:43,775 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:43,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:43,775 INFO L82 PathProgramCache]: Analyzing trace with hash -89207746, now seen corresponding path program 68 times [2021-06-06 00:28:43,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:43,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059202291] [2021-06-06 00:28:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:43,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:43,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059202291] [2021-06-06 00:28:43,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059202291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:43,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726934957] [2021-06-06 00:28:43,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:43,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:43,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:43,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:43,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:44,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:44,127 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:28:44,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 78 [2021-06-06 00:28:44,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:44,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:44,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:44,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:22 [2021-06-06 00:28:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:44,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726934957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:44,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:44,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:28:44,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492156244] [2021-06-06 00:28:44,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:28:44,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:44,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:28:44,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:28:44,177 INFO L87 Difference]: Start difference. First operand 1855 states and 6242 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:45,007 INFO L93 Difference]: Finished difference Result 2478 states and 8169 transitions. [2021-06-06 00:28:45,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:28:45,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:45,011 INFO L225 Difference]: With dead ends: 2478 [2021-06-06 00:28:45,011 INFO L226 Difference]: Without dead ends: 2463 [2021-06-06 00:28:45,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 634.1ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:28:45,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-06-06 00:28:45,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1857. [2021-06-06 00:28:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.3685344827586206) internal successors, (6252), 1856 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6252 transitions. [2021-06-06 00:28:45,043 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6252 transitions. Word has length 26 [2021-06-06 00:28:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:45,043 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6252 transitions. [2021-06-06 00:28:45,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6252 transitions. [2021-06-06 00:28:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:28:45,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:45,045 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:45,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:45,260 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:45,260 INFO L82 PathProgramCache]: Analyzing trace with hash 503651198, now seen corresponding path program 69 times [2021-06-06 00:28:45,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:45,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789807192] [2021-06-06 00:28:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:45,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:45,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789807192] [2021-06-06 00:28:45,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789807192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:45,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925691712] [2021-06-06 00:28:45,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:45,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:28:45,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:28:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:45,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:45,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:28:45,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:45,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-06 00:28:45,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:28:45,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:45,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:45,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-06 00:28:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:45,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925691712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:45,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:45,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:28:45,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550867668] [2021-06-06 00:28:45,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:28:45,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:45,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:28:45,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:28:45,570 INFO L87 Difference]: Start difference. First operand 1857 states and 6252 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:46,215 INFO L93 Difference]: Finished difference Result 2626 states and 8587 transitions. [2021-06-06 00:28:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:28:46,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:28:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:46,218 INFO L225 Difference]: With dead ends: 2626 [2021-06-06 00:28:46,218 INFO L226 Difference]: Without dead ends: 2596 [2021-06-06 00:28:46,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:28:46,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-06 00:28:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1857. [2021-06-06 00:28:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.3685344827586206) internal successors, (6252), 1856 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6252 transitions. [2021-06-06 00:28:46,249 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6252 transitions. Word has length 26 [2021-06-06 00:28:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:46,249 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6252 transitions. [2021-06-06 00:28:46,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6252 transitions. [2021-06-06 00:28:46,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:46,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:46,251 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:46,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-06 00:28:46,453 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:46,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-06-06 00:28:46,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:46,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017854845] [2021-06-06 00:28:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:46,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:46,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017854845] [2021-06-06 00:28:46,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017854845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:46,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233115105] [2021-06-06 00:28:46,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:46,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:28:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:46,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:28:46,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:46,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233115105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:46,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:46,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:28:46,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153875811] [2021-06-06 00:28:46,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:28:46,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:46,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:28:46,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:28:46,608 INFO L87 Difference]: Start difference. First operand 1857 states and 6252 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:47,443 INFO L93 Difference]: Finished difference Result 4803 states and 14780 transitions. [2021-06-06 00:28:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:28:47,443 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:47,449 INFO L225 Difference]: With dead ends: 4803 [2021-06-06 00:28:47,449 INFO L226 Difference]: Without dead ends: 4803 [2021-06-06 00:28:47,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 493.9ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:28:47,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-06-06 00:28:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 2054. [2021-06-06 00:28:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.4305893813930832) internal successors, (7043), 2053 states have internal predecessors, (7043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 7043 transitions. [2021-06-06 00:28:47,485 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 7043 transitions. Word has length 28 [2021-06-06 00:28:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:47,485 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 7043 transitions. [2021-06-06 00:28:47,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:47,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 7043 transitions. [2021-06-06 00:28:47,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:47,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:47,487 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:47,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-06 00:28:47,688 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:47,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:47,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-06-06 00:28:47,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:47,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531181639] [2021-06-06 00:28:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:47,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:47,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531181639] [2021-06-06 00:28:47,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531181639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:47,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121274019] [2021-06-06 00:28:47,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:47,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:28:47,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:28:47,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:47,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121274019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:47,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:47,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:28:47,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571482744] [2021-06-06 00:28:47,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:28:47,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:28:47,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:28:47,846 INFO L87 Difference]: Start difference. First operand 2054 states and 7043 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:48,999 INFO L93 Difference]: Finished difference Result 6390 states and 19386 transitions. [2021-06-06 00:28:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:28:48,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:48,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:49,007 INFO L225 Difference]: With dead ends: 6390 [2021-06-06 00:28:49,008 INFO L226 Difference]: Without dead ends: 6390 [2021-06-06 00:28:49,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 685.6ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:28:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6390 states. [2021-06-06 00:28:49,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6390 to 2065. [2021-06-06 00:28:49,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 3.438468992248062) internal successors, (7097), 2064 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:49,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 7097 transitions. [2021-06-06 00:28:49,056 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 7097 transitions. Word has length 28 [2021-06-06 00:28:49,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:49,056 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 7097 transitions. [2021-06-06 00:28:49,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:49,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 7097 transitions. [2021-06-06 00:28:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:49,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:49,058 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:49,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-06 00:28:49,259 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:49,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:49,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-06-06 00:28:49,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:49,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675098043] [2021-06-06 00:28:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:49,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:49,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675098043] [2021-06-06 00:28:49,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675098043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:49,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781653552] [2021-06-06 00:28:49,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:49,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:28:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:49,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781653552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:49,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:49,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:28:49,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764466323] [2021-06-06 00:28:49,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:28:49,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:28:49,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:28:49,413 INFO L87 Difference]: Start difference. First operand 2065 states and 7097 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:50,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:50,467 INFO L93 Difference]: Finished difference Result 5783 states and 17918 transitions. [2021-06-06 00:28:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:28:50,467 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:50,475 INFO L225 Difference]: With dead ends: 5783 [2021-06-06 00:28:50,475 INFO L226 Difference]: Without dead ends: 5783 [2021-06-06 00:28:50,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 638.1ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-06 00:28:50,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5783 states. [2021-06-06 00:28:50,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5783 to 2013. [2021-06-06 00:28:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 3.412027833001988) internal successors, (6865), 2012 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 6865 transitions. [2021-06-06 00:28:50,517 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 6865 transitions. Word has length 28 [2021-06-06 00:28:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:50,517 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 6865 transitions. [2021-06-06 00:28:50,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:50,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 6865 transitions. [2021-06-06 00:28:50,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:50,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:50,520 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:50,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:50,735 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:50,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-06-06 00:28:50,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:50,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142485892] [2021-06-06 00:28:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:50,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:50,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142485892] [2021-06-06 00:28:50,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142485892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:50,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723015643] [2021-06-06 00:28:50,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:28:50,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:50,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:50,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:28:50,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:50,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723015643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:50,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:50,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:28:50,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230613058] [2021-06-06 00:28:50,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:28:50,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:50,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:28:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:28:50,895 INFO L87 Difference]: Start difference. First operand 2013 states and 6865 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:51,836 INFO L93 Difference]: Finished difference Result 4901 states and 14979 transitions. [2021-06-06 00:28:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:28:51,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:51,842 INFO L225 Difference]: With dead ends: 4901 [2021-06-06 00:28:51,842 INFO L226 Difference]: Without dead ends: 4901 [2021-06-06 00:28:51,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 572.7ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:28:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-06 00:28:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 2023. [2021-06-06 00:28:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.408011869436202) internal successors, (6891), 2022 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6891 transitions. [2021-06-06 00:28:51,877 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6891 transitions. Word has length 28 [2021-06-06 00:28:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:51,878 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 6891 transitions. [2021-06-06 00:28:51,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6891 transitions. [2021-06-06 00:28:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:51,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:51,880 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:52,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:52,080 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:52,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:52,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 70 times [2021-06-06 00:28:52,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:52,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571438039] [2021-06-06 00:28:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:52,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:52,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571438039] [2021-06-06 00:28:52,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571438039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:52,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734164712] [2021-06-06 00:28:52,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:52,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:52,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:52,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:28:52,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:52,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734164712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:52,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:52,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:28:52,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838962145] [2021-06-06 00:28:52,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:28:52,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:52,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:28:52,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:28:52,215 INFO L87 Difference]: Start difference. First operand 2023 states and 6891 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:52,709 INFO L93 Difference]: Finished difference Result 4322 states and 13382 transitions. [2021-06-06 00:28:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:28:52,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:52,715 INFO L225 Difference]: With dead ends: 4322 [2021-06-06 00:28:52,715 INFO L226 Difference]: Without dead ends: 4322 [2021-06-06 00:28:52,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:28:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4322 states. [2021-06-06 00:28:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4322 to 2079. [2021-06-06 00:28:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 3.3946102021174207) internal successors, (7054), 2078 states have internal predecessors, (7054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 7054 transitions. [2021-06-06 00:28:52,748 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 7054 transitions. Word has length 28 [2021-06-06 00:28:52,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:52,748 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 7054 transitions. [2021-06-06 00:28:52,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 7054 transitions. [2021-06-06 00:28:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:52,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:52,761 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:52,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-06 00:28:52,962 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:52,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-06-06 00:28:52,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:52,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587864980] [2021-06-06 00:28:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:28:52,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:52,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587864980] [2021-06-06 00:28:52,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587864980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:52,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283003694] [2021-06-06 00:28:52,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:53,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:28:53,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:53,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:28:53,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:28:53,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283003694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:53,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:53,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:28:53,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979119122] [2021-06-06 00:28:53,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:28:53,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:53,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:28:53,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:28:53,060 INFO L87 Difference]: Start difference. First operand 2079 states and 7054 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:53,211 INFO L93 Difference]: Finished difference Result 3611 states and 11674 transitions. [2021-06-06 00:28:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:28:53,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:53,216 INFO L225 Difference]: With dead ends: 3611 [2021-06-06 00:28:53,216 INFO L226 Difference]: Without dead ends: 3593 [2021-06-06 00:28:53,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:28:53,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-06-06 00:28:53,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 2470. [2021-06-06 00:28:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.4726609963547994) internal successors, (8574), 2469 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8574 transitions. [2021-06-06 00:28:53,248 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8574 transitions. Word has length 28 [2021-06-06 00:28:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:53,248 INFO L482 AbstractCegarLoop]: Abstraction has 2470 states and 8574 transitions. [2021-06-06 00:28:53,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8574 transitions. [2021-06-06 00:28:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:53,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:53,251 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:53,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-06 00:28:53,451 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:53,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-06-06 00:28:53,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:53,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825429980] [2021-06-06 00:28:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:53,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:53,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825429980] [2021-06-06 00:28:53,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825429980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:53,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781334512] [2021-06-06 00:28:53,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:53,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:53,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:53,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:28:53,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:53,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781334512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:53,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:53,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:28:53,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551637363] [2021-06-06 00:28:53,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:28:53,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:53,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:28:53,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:28:53,573 INFO L87 Difference]: Start difference. First operand 2470 states and 8574 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:54,087 INFO L93 Difference]: Finished difference Result 4256 states and 13496 transitions. [2021-06-06 00:28:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:28:54,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:54,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:54,093 INFO L225 Difference]: With dead ends: 4256 [2021-06-06 00:28:54,093 INFO L226 Difference]: Without dead ends: 4209 [2021-06-06 00:28:54,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:28:54,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2021-06-06 00:28:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 2635. [2021-06-06 00:28:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 3.4935459377372817) internal successors, (9202), 2634 states have internal predecessors, (9202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 9202 transitions. [2021-06-06 00:28:54,135 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 9202 transitions. Word has length 28 [2021-06-06 00:28:54,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:54,135 INFO L482 AbstractCegarLoop]: Abstraction has 2635 states and 9202 transitions. [2021-06-06 00:28:54,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:54,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 9202 transitions. [2021-06-06 00:28:54,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:54,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:54,138 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:54,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:54,338 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:54,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1904037996, now seen corresponding path program 71 times [2021-06-06 00:28:54,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:54,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355542816] [2021-06-06 00:28:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:54,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:54,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355542816] [2021-06-06 00:28:54,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355542816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:54,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990533124] [2021-06-06 00:28:54,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:54,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:28:54,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:54,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:28:54,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:54,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990533124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:54,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:54,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-06 00:28:54,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926444556] [2021-06-06 00:28:54,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:28:54,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:54,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:28:54,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:28:54,483 INFO L87 Difference]: Start difference. First operand 2635 states and 9202 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:54,846 INFO L93 Difference]: Finished difference Result 5094 states and 16833 transitions. [2021-06-06 00:28:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:28:54,846 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:54,852 INFO L225 Difference]: With dead ends: 5094 [2021-06-06 00:28:54,853 INFO L226 Difference]: Without dead ends: 5007 [2021-06-06 00:28:54,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 283.5ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5007 states. [2021-06-06 00:28:54,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5007 to 3294. [2021-06-06 00:28:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 3293 states have (on average 3.5204980261160035) internal successors, (11593), 3293 states have internal predecessors, (11593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 11593 transitions. [2021-06-06 00:28:54,923 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 11593 transitions. Word has length 28 [2021-06-06 00:28:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:54,923 INFO L482 AbstractCegarLoop]: Abstraction has 3294 states and 11593 transitions. [2021-06-06 00:28:54,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:54,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 11593 transitions. [2021-06-06 00:28:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:54,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:54,927 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:55,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-06 00:28:55,127 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:55,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:55,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-06-06 00:28:55,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:55,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142233692] [2021-06-06 00:28:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:55,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:55,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142233692] [2021-06-06 00:28:55,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142233692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:55,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941881187] [2021-06-06 00:28:55,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:55,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:28:55,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:55,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:28:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:55,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941881187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:55,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:55,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:28:55,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294524536] [2021-06-06 00:28:55,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:28:55,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:55,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:28:55,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:28:55,267 INFO L87 Difference]: Start difference. First operand 3294 states and 11593 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:55,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:55,872 INFO L93 Difference]: Finished difference Result 5537 states and 17511 transitions. [2021-06-06 00:28:55,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:28:55,872 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:55,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:55,880 INFO L225 Difference]: With dead ends: 5537 [2021-06-06 00:28:55,880 INFO L226 Difference]: Without dead ends: 5511 [2021-06-06 00:28:55,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:28:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-06-06 00:28:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 3312. [2021-06-06 00:28:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 3311 states have (on average 3.5258230141951072) internal successors, (11674), 3311 states have internal predecessors, (11674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 11674 transitions. [2021-06-06 00:28:55,952 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 11674 transitions. Word has length 28 [2021-06-06 00:28:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:55,952 INFO L482 AbstractCegarLoop]: Abstraction has 3312 states and 11674 transitions. [2021-06-06 00:28:55,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 11674 transitions. [2021-06-06 00:28:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:55,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:55,956 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:56,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:56,157 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:56,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:56,157 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-06-06 00:28:56,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:56,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103005007] [2021-06-06 00:28:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:56,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:56,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103005007] [2021-06-06 00:28:56,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103005007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:56,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693274201] [2021-06-06 00:28:56,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:56,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:28:56,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:56,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:28:56,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:56,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693274201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:56,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:56,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:28:56,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568011180] [2021-06-06 00:28:56,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:28:56,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:56,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:28:56,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:28:56,305 INFO L87 Difference]: Start difference. First operand 3312 states and 11674 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:56,900 INFO L93 Difference]: Finished difference Result 5592 states and 17703 transitions. [2021-06-06 00:28:56,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:28:56,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:56,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:56,907 INFO L225 Difference]: With dead ends: 5592 [2021-06-06 00:28:56,907 INFO L226 Difference]: Without dead ends: 5561 [2021-06-06 00:28:56,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:28:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2021-06-06 00:28:56,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 3305. [2021-06-06 00:28:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 3304 states have (on average 3.5320823244552058) internal successors, (11670), 3304 states have internal predecessors, (11670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 11670 transitions. [2021-06-06 00:28:56,963 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 11670 transitions. Word has length 28 [2021-06-06 00:28:56,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:56,963 INFO L482 AbstractCegarLoop]: Abstraction has 3305 states and 11670 transitions. [2021-06-06 00:28:56,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:56,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 11670 transitions. [2021-06-06 00:28:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:56,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:56,967 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:57,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-06 00:28:57,167 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:57,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-06-06 00:28:57,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:57,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596759544] [2021-06-06 00:28:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:57,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:57,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596759544] [2021-06-06 00:28:57,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596759544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:57,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432833454] [2021-06-06 00:28:57,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:57,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:28:57,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:57,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432833454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:57,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:57,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:28:57,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859770315] [2021-06-06 00:28:57,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:28:57,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:57,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:28:57,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:28:57,290 INFO L87 Difference]: Start difference. First operand 3305 states and 11670 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:57,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:57,771 INFO L93 Difference]: Finished difference Result 6756 states and 21782 transitions. [2021-06-06 00:28:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:28:57,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:57,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:57,780 INFO L225 Difference]: With dead ends: 6756 [2021-06-06 00:28:57,780 INFO L226 Difference]: Without dead ends: 6709 [2021-06-06 00:28:57,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:28:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6709 states. [2021-06-06 00:28:57,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 3468. [2021-06-06 00:28:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 3467 states have (on average 3.5785982117104123) internal successors, (12407), 3467 states have internal predecessors, (12407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 12407 transitions. [2021-06-06 00:28:57,862 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 12407 transitions. Word has length 28 [2021-06-06 00:28:57,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:57,862 INFO L482 AbstractCegarLoop]: Abstraction has 3468 states and 12407 transitions. [2021-06-06 00:28:57,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:57,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 12407 transitions. [2021-06-06 00:28:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:57,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:57,866 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:58,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-06 00:28:58,066 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:58,067 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-06-06 00:28:58,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:58,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274282385] [2021-06-06 00:28:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:28:58,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:58,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274282385] [2021-06-06 00:28:58,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274282385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:58,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488136429] [2021-06-06 00:28:58,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:58,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:58,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:58,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:28:58,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:28:58,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488136429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:58,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:58,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:28:58,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600273821] [2021-06-06 00:28:58,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:28:58,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:58,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:28:58,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:28:58,163 INFO L87 Difference]: Start difference. First operand 3468 states and 12407 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:58,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:58,303 INFO L93 Difference]: Finished difference Result 5162 states and 17045 transitions. [2021-06-06 00:28:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:28:58,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:58,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:58,310 INFO L225 Difference]: With dead ends: 5162 [2021-06-06 00:28:58,310 INFO L226 Difference]: Without dead ends: 5162 [2021-06-06 00:28:58,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:28:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-06-06 00:28:58,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 3300. [2021-06-06 00:28:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3300 states, 3299 states have (on average 3.5383449530160656) internal successors, (11673), 3299 states have internal predecessors, (11673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 11673 transitions. [2021-06-06 00:28:58,361 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 11673 transitions. Word has length 28 [2021-06-06 00:28:58,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:58,361 INFO L482 AbstractCegarLoop]: Abstraction has 3300 states and 11673 transitions. [2021-06-06 00:28:58,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:58,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 11673 transitions. [2021-06-06 00:28:58,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:58,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:58,365 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:58,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-06 00:28:58,565 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:58,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:58,565 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-06-06 00:28:58,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:58,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679590543] [2021-06-06 00:28:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:58,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:58,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679590543] [2021-06-06 00:28:58,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679590543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:58,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820015245] [2021-06-06 00:28:58,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:58,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:28:58,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:58,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:28:58,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:58,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820015245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:58,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:58,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:28:58,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825783604] [2021-06-06 00:28:58,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:28:58,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:58,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:28:58,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:28:58,685 INFO L87 Difference]: Start difference. First operand 3300 states and 11673 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:59,311 INFO L93 Difference]: Finished difference Result 7204 states and 22976 transitions. [2021-06-06 00:28:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:28:59,311 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:28:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:59,321 INFO L225 Difference]: With dead ends: 7204 [2021-06-06 00:28:59,321 INFO L226 Difference]: Without dead ends: 7204 [2021-06-06 00:28:59,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 357.3ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:28:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7204 states. [2021-06-06 00:28:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7204 to 3330. [2021-06-06 00:28:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3329 states have (on average 3.5379993992189847) internal successors, (11778), 3329 states have internal predecessors, (11778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 11778 transitions. [2021-06-06 00:28:59,393 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 11778 transitions. Word has length 28 [2021-06-06 00:28:59,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:59,393 INFO L482 AbstractCegarLoop]: Abstraction has 3330 states and 11778 transitions. [2021-06-06 00:28:59,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:59,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 11778 transitions. [2021-06-06 00:28:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:28:59,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:59,397 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:59,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-06 00:28:59,597 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:59,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:59,597 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-06-06 00:28:59,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:59,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654439426] [2021-06-06 00:28:59,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:59,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:59,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654439426] [2021-06-06 00:28:59,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654439426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:59,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555607408] [2021-06-06 00:28:59,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:59,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:59,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:59,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:28:59,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:59,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555607408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:59,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:59,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:28:59,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177442155] [2021-06-06 00:28:59,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:28:59,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:59,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:28:59,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:28:59,742 INFO L87 Difference]: Start difference. First operand 3330 states and 11778 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:00,393 INFO L93 Difference]: Finished difference Result 7509 states and 23981 transitions. [2021-06-06 00:29:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:29:00,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:00,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:00,404 INFO L225 Difference]: With dead ends: 7509 [2021-06-06 00:29:00,404 INFO L226 Difference]: Without dead ends: 7509 [2021-06-06 00:29:00,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:29:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2021-06-06 00:29:00,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 3460. [2021-06-06 00:29:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 3459 states have (on average 3.5226944203527033) internal successors, (12185), 3459 states have internal predecessors, (12185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 12185 transitions. [2021-06-06 00:29:00,482 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 12185 transitions. Word has length 28 [2021-06-06 00:29:00,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:00,482 INFO L482 AbstractCegarLoop]: Abstraction has 3460 states and 12185 transitions. [2021-06-06 00:29:00,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 12185 transitions. [2021-06-06 00:29:00,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:00,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:00,487 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:00,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-06 00:29:00,687 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:00,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-06-06 00:29:00,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:00,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035274826] [2021-06-06 00:29:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:00,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:00,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035274826] [2021-06-06 00:29:00,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035274826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:00,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659287988] [2021-06-06 00:29:00,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:00,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:29:00,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:00,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:29:00,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:00,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659287988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:00,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:00,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:29:00,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026460542] [2021-06-06 00:29:00,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:29:00,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:00,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:29:00,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:29:00,807 INFO L87 Difference]: Start difference. First operand 3460 states and 12185 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:01,360 INFO L93 Difference]: Finished difference Result 8003 states and 25580 transitions. [2021-06-06 00:29:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:29:01,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:01,370 INFO L225 Difference]: With dead ends: 8003 [2021-06-06 00:29:01,370 INFO L226 Difference]: Without dead ends: 7990 [2021-06-06 00:29:01,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:29:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-06 00:29:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 4105. [2021-06-06 00:29:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4104 states have (on average 3.5689571150097468) internal successors, (14647), 4104 states have internal predecessors, (14647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:01,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 14647 transitions. [2021-06-06 00:29:01,459 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 14647 transitions. Word has length 28 [2021-06-06 00:29:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:01,459 INFO L482 AbstractCegarLoop]: Abstraction has 4105 states and 14647 transitions. [2021-06-06 00:29:01,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 14647 transitions. [2021-06-06 00:29:01,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:01,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:01,464 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:01,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-06 00:29:01,664 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-06-06 00:29:01,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:01,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369061033] [2021-06-06 00:29:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:01,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:01,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369061033] [2021-06-06 00:29:01,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369061033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:01,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765662719] [2021-06-06 00:29:01,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:01,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:29:01,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:01,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:29:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:01,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765662719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:01,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:01,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:29:01,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556489985] [2021-06-06 00:29:01,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:29:01,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:29:01,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:29:01,779 INFO L87 Difference]: Start difference. First operand 4105 states and 14647 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:02,307 INFO L93 Difference]: Finished difference Result 8255 states and 26274 transitions. [2021-06-06 00:29:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:29:02,307 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:02,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:02,318 INFO L225 Difference]: With dead ends: 8255 [2021-06-06 00:29:02,318 INFO L226 Difference]: Without dead ends: 8255 [2021-06-06 00:29:02,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:29:02,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-06-06 00:29:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 3852. [2021-06-06 00:29:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 3.5344066476239937) internal successors, (13611), 3851 states have internal predecessors, (13611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 13611 transitions. [2021-06-06 00:29:02,405 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 13611 transitions. Word has length 28 [2021-06-06 00:29:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:02,405 INFO L482 AbstractCegarLoop]: Abstraction has 3852 states and 13611 transitions. [2021-06-06 00:29:02,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:02,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 13611 transitions. [2021-06-06 00:29:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:02,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:02,410 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:02,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:02,622 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:02,622 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-06-06 00:29:02,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:02,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826211610] [2021-06-06 00:29:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:02,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:02,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826211610] [2021-06-06 00:29:02,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826211610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:02,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906405113] [2021-06-06 00:29:02,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:02,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:02,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:02,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906405113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:02,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:02,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:29:02,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150752663] [2021-06-06 00:29:02,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:29:02,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:02,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:29:02,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:29:02,733 INFO L87 Difference]: Start difference. First operand 3852 states and 13611 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:03,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:03,352 INFO L93 Difference]: Finished difference Result 7348 states and 24071 transitions. [2021-06-06 00:29:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:29:03,352 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:03,380 INFO L225 Difference]: With dead ends: 7348 [2021-06-06 00:29:03,380 INFO L226 Difference]: Without dead ends: 7344 [2021-06-06 00:29:03,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 344.2ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:29:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7344 states. [2021-06-06 00:29:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7344 to 3485. [2021-06-06 00:29:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3485 states, 3484 states have (on average 3.577784156142365) internal successors, (12465), 3484 states have internal predecessors, (12465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3485 states to 3485 states and 12465 transitions. [2021-06-06 00:29:03,468 INFO L78 Accepts]: Start accepts. Automaton has 3485 states and 12465 transitions. Word has length 28 [2021-06-06 00:29:03,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:03,468 INFO L482 AbstractCegarLoop]: Abstraction has 3485 states and 12465 transitions. [2021-06-06 00:29:03,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3485 states and 12465 transitions. [2021-06-06 00:29:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:03,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:03,473 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:03,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-06 00:29:03,673 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-06-06 00:29:03,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:03,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014044203] [2021-06-06 00:29:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:03,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:03,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014044203] [2021-06-06 00:29:03,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014044203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:03,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278732659] [2021-06-06 00:29:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:03,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:03,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:03,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:03,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:03,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278732659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:03,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:03,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:29:03,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820210376] [2021-06-06 00:29:03,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:29:03,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:03,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:29:03,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:29:03,819 INFO L87 Difference]: Start difference. First operand 3485 states and 12465 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:04,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:04,698 INFO L93 Difference]: Finished difference Result 11702 states and 38583 transitions. [2021-06-06 00:29:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:29:04,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:04,719 INFO L225 Difference]: With dead ends: 11702 [2021-06-06 00:29:04,719 INFO L226 Difference]: Without dead ends: 11702 [2021-06-06 00:29:04,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:29:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11702 states. [2021-06-06 00:29:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11702 to 3776. [2021-06-06 00:29:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3776 states, 3775 states have (on average 3.6603973509933776) internal successors, (13818), 3775 states have internal predecessors, (13818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3776 states to 3776 states and 13818 transitions. [2021-06-06 00:29:04,844 INFO L78 Accepts]: Start accepts. Automaton has 3776 states and 13818 transitions. Word has length 28 [2021-06-06 00:29:04,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:04,844 INFO L482 AbstractCegarLoop]: Abstraction has 3776 states and 13818 transitions. [2021-06-06 00:29:04,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:04,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3776 states and 13818 transitions. [2021-06-06 00:29:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:04,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:04,849 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:05,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-06 00:29:05,050 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:05,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:05,050 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-06-06 00:29:05,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:05,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216126073] [2021-06-06 00:29:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:05,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:05,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216126073] [2021-06-06 00:29:05,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216126073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:05,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957688462] [2021-06-06 00:29:05,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:05,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:29:05,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:05,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:05,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:05,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957688462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:05,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:05,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:29:05,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090326840] [2021-06-06 00:29:05,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:29:05,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:05,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:29:05,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:29:05,188 INFO L87 Difference]: Start difference. First operand 3776 states and 13818 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:06,047 INFO L93 Difference]: Finished difference Result 11394 states and 37759 transitions. [2021-06-06 00:29:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:29:06,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:06,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:06,065 INFO L225 Difference]: With dead ends: 11394 [2021-06-06 00:29:06,065 INFO L226 Difference]: Without dead ends: 11394 [2021-06-06 00:29:06,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 522.2ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:29:06,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11394 states. [2021-06-06 00:29:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11394 to 3727. [2021-06-06 00:29:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 3726 states have (on average 3.640096618357488) internal successors, (13563), 3726 states have internal predecessors, (13563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 13563 transitions. [2021-06-06 00:29:06,186 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 13563 transitions. Word has length 28 [2021-06-06 00:29:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:06,186 INFO L482 AbstractCegarLoop]: Abstraction has 3727 states and 13563 transitions. [2021-06-06 00:29:06,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 13563 transitions. [2021-06-06 00:29:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:06,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:06,190 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:06,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:06,391 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:06,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:06,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-06-06 00:29:06,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:06,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234318344] [2021-06-06 00:29:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:06,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:06,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234318344] [2021-06-06 00:29:06,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234318344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:06,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794506401] [2021-06-06 00:29:06,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:06,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:06,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:06,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:06,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:06,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794506401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:06,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:06,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:29:06,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266410126] [2021-06-06 00:29:06,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:29:06,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:06,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:29:06,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:29:06,519 INFO L87 Difference]: Start difference. First operand 3727 states and 13563 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:07,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:07,404 INFO L93 Difference]: Finished difference Result 10677 states and 34212 transitions. [2021-06-06 00:29:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:29:07,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:07,422 INFO L225 Difference]: With dead ends: 10677 [2021-06-06 00:29:07,422 INFO L226 Difference]: Without dead ends: 10677 [2021-06-06 00:29:07,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:29:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2021-06-06 00:29:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 3767. [2021-06-06 00:29:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 3.6444503451938397) internal successors, (13725), 3766 states have internal predecessors, (13725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 13725 transitions. [2021-06-06 00:29:07,578 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 13725 transitions. Word has length 28 [2021-06-06 00:29:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:07,579 INFO L482 AbstractCegarLoop]: Abstraction has 3767 states and 13725 transitions. [2021-06-06 00:29:07,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 13725 transitions. [2021-06-06 00:29:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:07,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:07,584 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:07,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:07,801 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:07,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:07,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-06-06 00:29:07,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:07,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671680945] [2021-06-06 00:29:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:07,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:07,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671680945] [2021-06-06 00:29:07,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671680945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:07,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443819195] [2021-06-06 00:29:07,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:07,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:29:07,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:07,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:07,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:07,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443819195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:07,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:07,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:29:07,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631744537] [2021-06-06 00:29:07,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:29:07,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:07,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:29:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:29:07,928 INFO L87 Difference]: Start difference. First operand 3767 states and 13725 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:08,692 INFO L93 Difference]: Finished difference Result 10058 states and 32692 transitions. [2021-06-06 00:29:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:29:08,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:08,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:08,709 INFO L225 Difference]: With dead ends: 10058 [2021-06-06 00:29:08,709 INFO L226 Difference]: Without dead ends: 10050 [2021-06-06 00:29:08,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 420.9ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:29:08,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10050 states. [2021-06-06 00:29:08,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10050 to 3733. [2021-06-06 00:29:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.6393354769560555) internal successors, (13582), 3732 states have internal predecessors, (13582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 13582 transitions. [2021-06-06 00:29:08,842 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 13582 transitions. Word has length 28 [2021-06-06 00:29:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:08,842 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 13582 transitions. [2021-06-06 00:29:08,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 13582 transitions. [2021-06-06 00:29:08,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:08,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:08,846 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:09,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:09,047 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:09,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:09,047 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-06-06 00:29:09,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:09,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262680729] [2021-06-06 00:29:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:09,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:09,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262680729] [2021-06-06 00:29:09,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262680729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:09,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143584130] [2021-06-06 00:29:09,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:09,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:29:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:09,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:09,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:09,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143584130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:09,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:09,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:29:09,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798764168] [2021-06-06 00:29:09,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:29:09,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:09,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:29:09,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:29:09,199 INFO L87 Difference]: Start difference. First operand 3733 states and 13582 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:10,076 INFO L93 Difference]: Finished difference Result 9657 states and 31573 transitions. [2021-06-06 00:29:10,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-06 00:29:10,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:10,091 INFO L225 Difference]: With dead ends: 9657 [2021-06-06 00:29:10,091 INFO L226 Difference]: Without dead ends: 9657 [2021-06-06 00:29:10,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 494.7ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:29:10,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9657 states. [2021-06-06 00:29:10,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9657 to 3749. [2021-06-06 00:29:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3748 states have (on average 3.6408751334044824) internal successors, (13646), 3748 states have internal predecessors, (13646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 13646 transitions. [2021-06-06 00:29:10,190 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 13646 transitions. Word has length 28 [2021-06-06 00:29:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:10,190 INFO L482 AbstractCegarLoop]: Abstraction has 3749 states and 13646 transitions. [2021-06-06 00:29:10,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 13646 transitions. [2021-06-06 00:29:10,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:10,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:10,194 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:10,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-06 00:29:10,395 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:10,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-06-06 00:29:10,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:10,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751657241] [2021-06-06 00:29:10,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:10,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:10,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751657241] [2021-06-06 00:29:10,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751657241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:10,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663715646] [2021-06-06 00:29:10,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:10,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:10,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663715646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:10,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:10,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:29:10,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321638927] [2021-06-06 00:29:10,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:29:10,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:10,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:29:10,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:29:10,537 INFO L87 Difference]: Start difference. First operand 3749 states and 13646 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:11,361 INFO L93 Difference]: Finished difference Result 9322 states and 30778 transitions. [2021-06-06 00:29:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:29:11,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:11,376 INFO L225 Difference]: With dead ends: 9322 [2021-06-06 00:29:11,376 INFO L226 Difference]: Without dead ends: 9314 [2021-06-06 00:29:11,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 447.7ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:29:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9314 states. [2021-06-06 00:29:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9314 to 3417. [2021-06-06 00:29:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 3.55327868852459) internal successors, (12138), 3416 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 12138 transitions. [2021-06-06 00:29:11,468 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 12138 transitions. Word has length 28 [2021-06-06 00:29:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:11,468 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 12138 transitions. [2021-06-06 00:29:11,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 12138 transitions. [2021-06-06 00:29:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:11,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:11,472 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:11,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-06 00:29:11,673 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:11,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-06-06 00:29:11,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:11,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785441119] [2021-06-06 00:29:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:11,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:11,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785441119] [2021-06-06 00:29:11,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785441119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:11,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512219723] [2021-06-06 00:29:11,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:11,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:11,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:11,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:11,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:11,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512219723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:11,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:11,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:29:11,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543527251] [2021-06-06 00:29:11,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:29:11,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:11,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:29:11,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:29:11,818 INFO L87 Difference]: Start difference. First operand 3417 states and 12138 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:12,585 INFO L93 Difference]: Finished difference Result 7074 states and 23087 transitions. [2021-06-06 00:29:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:29:12,586 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:12,595 INFO L225 Difference]: With dead ends: 7074 [2021-06-06 00:29:12,596 INFO L226 Difference]: Without dead ends: 7074 [2021-06-06 00:29:12,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 476.6ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:29:12,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7074 states. [2021-06-06 00:29:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7074 to 3429. [2021-06-06 00:29:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.5519253208868147) internal successors, (12176), 3428 states have internal predecessors, (12176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12176 transitions. [2021-06-06 00:29:12,665 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12176 transitions. Word has length 28 [2021-06-06 00:29:12,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:12,665 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 12176 transitions. [2021-06-06 00:29:12,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12176 transitions. [2021-06-06 00:29:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:12,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:12,669 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:12,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-06 00:29:12,870 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:12,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-06-06 00:29:12,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:12,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199870360] [2021-06-06 00:29:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:12,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:12,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199870360] [2021-06-06 00:29:12,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199870360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:12,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000551450] [2021-06-06 00:29:12,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:12,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:29:12,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:12,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:12,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:13,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000551450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:13,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:13,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:29:13,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667956955] [2021-06-06 00:29:13,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:13,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:13,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:13,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:13,018 INFO L87 Difference]: Start difference. First operand 3429 states and 12176 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:13,982 INFO L93 Difference]: Finished difference Result 8002 states and 25476 transitions. [2021-06-06 00:29:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:29:13,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:13,994 INFO L225 Difference]: With dead ends: 8002 [2021-06-06 00:29:13,994 INFO L226 Difference]: Without dead ends: 8002 [2021-06-06 00:29:13,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-06 00:29:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2021-06-06 00:29:14,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 3495. [2021-06-06 00:29:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3494 states have (on average 3.546937607326846) internal successors, (12393), 3494 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 12393 transitions. [2021-06-06 00:29:14,090 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 12393 transitions. Word has length 28 [2021-06-06 00:29:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:14,090 INFO L482 AbstractCegarLoop]: Abstraction has 3495 states and 12393 transitions. [2021-06-06 00:29:14,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 12393 transitions. [2021-06-06 00:29:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:14,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:14,094 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:14,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-06 00:29:14,310 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:14,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:14,310 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-06-06 00:29:14,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:14,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215348150] [2021-06-06 00:29:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:14,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:14,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215348150] [2021-06-06 00:29:14,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215348150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:14,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341522651] [2021-06-06 00:29:14,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:14,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:14,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:14,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:14,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:14,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341522651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:14,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:14,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:29:14,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576758719] [2021-06-06 00:29:14,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:14,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:14,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:14,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:14,450 INFO L87 Difference]: Start difference. First operand 3495 states and 12393 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:15,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:15,326 INFO L93 Difference]: Finished difference Result 7385 states and 23848 transitions. [2021-06-06 00:29:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:29:15,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:15,337 INFO L225 Difference]: With dead ends: 7385 [2021-06-06 00:29:15,337 INFO L226 Difference]: Without dead ends: 7381 [2021-06-06 00:29:15,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 534.7ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:29:15,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2021-06-06 00:29:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 3430. [2021-06-06 00:29:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.5444736074657333) internal successors, (12154), 3429 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 12154 transitions. [2021-06-06 00:29:15,412 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 12154 transitions. Word has length 28 [2021-06-06 00:29:15,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:15,412 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 12154 transitions. [2021-06-06 00:29:15,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 12154 transitions. [2021-06-06 00:29:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:15,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:15,416 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:15,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:15,616 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:15,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 72 times [2021-06-06 00:29:15,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:15,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052048644] [2021-06-06 00:29:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:15,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:15,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052048644] [2021-06-06 00:29:15,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052048644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:15,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537611065] [2021-06-06 00:29:15,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:15,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:29:15,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:15,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:15,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:15,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537611065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:15,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:15,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:29:15,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071453731] [2021-06-06 00:29:15,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:29:15,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:15,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:29:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:29:15,750 INFO L87 Difference]: Start difference. First operand 3430 states and 12154 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:16,269 INFO L93 Difference]: Finished difference Result 6528 states and 21436 transitions. [2021-06-06 00:29:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:29:16,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:16,278 INFO L225 Difference]: With dead ends: 6528 [2021-06-06 00:29:16,278 INFO L226 Difference]: Without dead ends: 6528 [2021-06-06 00:29:16,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:29:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-06-06 00:29:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 3434. [2021-06-06 00:29:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.5461695310224295) internal successors, (12174), 3433 states have internal predecessors, (12174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 12174 transitions. [2021-06-06 00:29:16,339 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 12174 transitions. Word has length 28 [2021-06-06 00:29:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:16,339 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 12174 transitions. [2021-06-06 00:29:16,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 12174 transitions. [2021-06-06 00:29:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:16,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:16,343 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:16,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-06 00:29:16,543 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:16,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:16,544 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 73 times [2021-06-06 00:29:16,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:16,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007267516] [2021-06-06 00:29:16,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:16,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:16,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007267516] [2021-06-06 00:29:16,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007267516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:16,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149051987] [2021-06-06 00:29:16,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:16,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:16,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:16,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149051987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:16,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:16,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:29:16,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849339930] [2021-06-06 00:29:16,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:29:16,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:16,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:29:16,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:29:16,675 INFO L87 Difference]: Start difference. First operand 3434 states and 12174 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:17,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:17,343 INFO L93 Difference]: Finished difference Result 6993 states and 22735 transitions. [2021-06-06 00:29:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:29:17,343 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:17,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:17,352 INFO L225 Difference]: With dead ends: 6993 [2021-06-06 00:29:17,353 INFO L226 Difference]: Without dead ends: 6993 [2021-06-06 00:29:17,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:29:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6993 states. [2021-06-06 00:29:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6993 to 3448. [2021-06-06 00:29:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3447 states have (on average 3.543661154627212) internal successors, (12215), 3447 states have internal predecessors, (12215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 12215 transitions. [2021-06-06 00:29:17,423 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 12215 transitions. Word has length 28 [2021-06-06 00:29:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:17,423 INFO L482 AbstractCegarLoop]: Abstraction has 3448 states and 12215 transitions. [2021-06-06 00:29:17,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 12215 transitions. [2021-06-06 00:29:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:17,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:17,428 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:17,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:17,628 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 74 times [2021-06-06 00:29:17,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:17,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630499134] [2021-06-06 00:29:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:17,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:17,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630499134] [2021-06-06 00:29:17,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630499134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:17,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648551004] [2021-06-06 00:29:17,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:17,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:17,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:17,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:17,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:17,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648551004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:17,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:17,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:29:17,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252560229] [2021-06-06 00:29:17,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:29:17,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:17,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:29:17,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:29:17,770 INFO L87 Difference]: Start difference. First operand 3448 states and 12215 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:18,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:18,506 INFO L93 Difference]: Finished difference Result 7512 states and 24206 transitions. [2021-06-06 00:29:18,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:29:18,506 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:18,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:18,517 INFO L225 Difference]: With dead ends: 7512 [2021-06-06 00:29:18,517 INFO L226 Difference]: Without dead ends: 7512 [2021-06-06 00:29:18,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 460.4ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:29:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7512 states. [2021-06-06 00:29:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7512 to 3530. [2021-06-06 00:29:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3530 states, 3529 states have (on average 3.537546047038821) internal successors, (12484), 3529 states have internal predecessors, (12484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3530 states to 3530 states and 12484 transitions. [2021-06-06 00:29:18,596 INFO L78 Accepts]: Start accepts. Automaton has 3530 states and 12484 transitions. Word has length 28 [2021-06-06 00:29:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:18,596 INFO L482 AbstractCegarLoop]: Abstraction has 3530 states and 12484 transitions. [2021-06-06 00:29:18,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3530 states and 12484 transitions. [2021-06-06 00:29:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:18,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:18,600 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:18,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-06 00:29:18,801 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:18,801 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 75 times [2021-06-06 00:29:18,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:18,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828387819] [2021-06-06 00:29:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:18,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:18,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828387819] [2021-06-06 00:29:18,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828387819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:18,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946926335] [2021-06-06 00:29:18,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:18,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:29:18,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:18,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:18,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:18,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946926335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:18,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:18,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-06 00:29:18,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942830531] [2021-06-06 00:29:18,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:18,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:18,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:18,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:18,935 INFO L87 Difference]: Start difference. First operand 3530 states and 12484 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:19,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:19,403 INFO L93 Difference]: Finished difference Result 7330 states and 25000 transitions. [2021-06-06 00:29:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:29:19,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:19,414 INFO L225 Difference]: With dead ends: 7330 [2021-06-06 00:29:19,414 INFO L226 Difference]: Without dead ends: 7330 [2021-06-06 00:29:19,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:29:19,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-06-06 00:29:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 4693. [2021-06-06 00:29:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4692 states have (on average 3.6579283887468033) internal successors, (17163), 4692 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 17163 transitions. [2021-06-06 00:29:19,511 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 17163 transitions. Word has length 28 [2021-06-06 00:29:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:19,512 INFO L482 AbstractCegarLoop]: Abstraction has 4693 states and 17163 transitions. [2021-06-06 00:29:19,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 17163 transitions. [2021-06-06 00:29:19,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:19,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:19,518 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:19,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:19,718 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:19,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:19,718 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 76 times [2021-06-06 00:29:19,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:19,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376700887] [2021-06-06 00:29:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:19,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:19,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376700887] [2021-06-06 00:29:19,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376700887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:19,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964895051] [2021-06-06 00:29:19,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:19,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:19,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:19,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964895051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:19,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:19,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:29:19,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733459527] [2021-06-06 00:29:19,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:29:19,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:19,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:29:19,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:29:19,840 INFO L87 Difference]: Start difference. First operand 4693 states and 17163 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:20,531 INFO L93 Difference]: Finished difference Result 8462 states and 28895 transitions. [2021-06-06 00:29:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:29:20,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:20,545 INFO L225 Difference]: With dead ends: 8462 [2021-06-06 00:29:20,545 INFO L226 Difference]: Without dead ends: 8458 [2021-06-06 00:29:20,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 409.5ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:29:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8458 states. [2021-06-06 00:29:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8458 to 4583. [2021-06-06 00:29:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 3.6682671322566565) internal successors, (16808), 4582 states have internal predecessors, (16808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 16808 transitions. [2021-06-06 00:29:20,643 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 16808 transitions. Word has length 28 [2021-06-06 00:29:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:20,643 INFO L482 AbstractCegarLoop]: Abstraction has 4583 states and 16808 transitions. [2021-06-06 00:29:20,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 16808 transitions. [2021-06-06 00:29:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:20,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:20,649 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:20,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable351 [2021-06-06 00:29:20,849 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:20,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-06-06 00:29:20,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:20,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213689947] [2021-06-06 00:29:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:20,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:20,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213689947] [2021-06-06 00:29:20,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213689947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:20,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309265241] [2021-06-06 00:29:20,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:20,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:29:20,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:20,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:29:20,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:20,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309265241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:20,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:20,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:29:20,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046022791] [2021-06-06 00:29:20,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:29:20,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:20,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:29:20,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:29:20,981 INFO L87 Difference]: Start difference. First operand 4583 states and 16808 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:21,766 INFO L93 Difference]: Finished difference Result 9599 states and 32446 transitions. [2021-06-06 00:29:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:29:21,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:21,781 INFO L225 Difference]: With dead ends: 9599 [2021-06-06 00:29:21,781 INFO L226 Difference]: Without dead ends: 9587 [2021-06-06 00:29:21,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:29:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9587 states. [2021-06-06 00:29:21,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9587 to 5054. [2021-06-06 00:29:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5054 states, 5053 states have (on average 3.752226400158322) internal successors, (18960), 5053 states have internal predecessors, (18960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5054 states to 5054 states and 18960 transitions. [2021-06-06 00:29:21,888 INFO L78 Accepts]: Start accepts. Automaton has 5054 states and 18960 transitions. Word has length 28 [2021-06-06 00:29:21,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:21,888 INFO L482 AbstractCegarLoop]: Abstraction has 5054 states and 18960 transitions. [2021-06-06 00:29:21,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:21,888 INFO L276 IsEmpty]: Start isEmpty. Operand 5054 states and 18960 transitions. [2021-06-06 00:29:21,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:21,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:21,895 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:22,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:22,095 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:22,095 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-06-06 00:29:22,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:22,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244644300] [2021-06-06 00:29:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:22,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:22,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244644300] [2021-06-06 00:29:22,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244644300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:22,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252950332] [2021-06-06 00:29:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:22,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:29:22,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:22,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:29:22,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:22,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252950332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:22,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:22,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:29:22,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303396309] [2021-06-06 00:29:22,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:29:22,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:22,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:29:22,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:29:22,220 INFO L87 Difference]: Start difference. First operand 5054 states and 18960 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:22,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:22,952 INFO L93 Difference]: Finished difference Result 9931 states and 33478 transitions. [2021-06-06 00:29:22,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:29:22,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:22,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:22,968 INFO L225 Difference]: With dead ends: 9931 [2021-06-06 00:29:22,968 INFO L226 Difference]: Without dead ends: 9931 [2021-06-06 00:29:22,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 425.4ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:29:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9931 states. [2021-06-06 00:29:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9931 to 5074. [2021-06-06 00:29:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5074 states, 5073 states have (on average 3.737236349300217) internal successors, (18959), 5073 states have internal predecessors, (18959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5074 states to 5074 states and 18959 transitions. [2021-06-06 00:29:23,094 INFO L78 Accepts]: Start accepts. Automaton has 5074 states and 18959 transitions. Word has length 28 [2021-06-06 00:29:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:23,094 INFO L482 AbstractCegarLoop]: Abstraction has 5074 states and 18959 transitions. [2021-06-06 00:29:23,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:23,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5074 states and 18959 transitions. [2021-06-06 00:29:23,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:23,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:23,100 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:23,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-06 00:29:23,301 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:23,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-06-06 00:29:23,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:23,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158280551] [2021-06-06 00:29:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:23,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:23,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158280551] [2021-06-06 00:29:23,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158280551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:23,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128113238] [2021-06-06 00:29:23,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:23,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:29:23,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:23,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128113238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:23,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:23,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:29:23,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974183426] [2021-06-06 00:29:23,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:29:23,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:23,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:29:23,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:29:23,405 INFO L87 Difference]: Start difference. First operand 5074 states and 18959 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:23,755 INFO L93 Difference]: Finished difference Result 9404 states and 33475 transitions. [2021-06-06 00:29:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:29:23,755 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:23,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:23,770 INFO L225 Difference]: With dead ends: 9404 [2021-06-06 00:29:23,770 INFO L226 Difference]: Without dead ends: 9321 [2021-06-06 00:29:23,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:29:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9321 states. [2021-06-06 00:29:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9321 to 6509. [2021-06-06 00:29:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6508 states have (on average 3.785341118623233) internal successors, (24635), 6508 states have internal predecessors, (24635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 24635 transitions. [2021-06-06 00:29:23,883 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 24635 transitions. Word has length 28 [2021-06-06 00:29:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:23,883 INFO L482 AbstractCegarLoop]: Abstraction has 6509 states and 24635 transitions. [2021-06-06 00:29:23,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 24635 transitions. [2021-06-06 00:29:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:23,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:23,892 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:24,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:24,097 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:24,097 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-06-06 00:29:24,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:24,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494234912] [2021-06-06 00:29:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:24,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:24,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494234912] [2021-06-06 00:29:24,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494234912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:24,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059807040] [2021-06-06 00:29:24,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:24,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:24,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:24,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:29:24,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:24,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059807040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:24,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:24,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-06 00:29:24,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788007313] [2021-06-06 00:29:24,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:29:24,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:29:24,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:29:24,190 INFO L87 Difference]: Start difference. First operand 6509 states and 24635 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:24,347 INFO L93 Difference]: Finished difference Result 8941 states and 31711 transitions. [2021-06-06 00:29:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:29:24,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:24,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:24,363 INFO L225 Difference]: With dead ends: 8941 [2021-06-06 00:29:24,363 INFO L226 Difference]: Without dead ends: 8941 [2021-06-06 00:29:24,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:29:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8941 states. [2021-06-06 00:29:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8941 to 6655. [2021-06-06 00:29:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6655 states, 6654 states have (on average 3.7639014126841) internal successors, (25045), 6654 states have internal predecessors, (25045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6655 states to 6655 states and 25045 transitions. [2021-06-06 00:29:24,478 INFO L78 Accepts]: Start accepts. Automaton has 6655 states and 25045 transitions. Word has length 28 [2021-06-06 00:29:24,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:24,478 INFO L482 AbstractCegarLoop]: Abstraction has 6655 states and 25045 transitions. [2021-06-06 00:29:24,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:24,478 INFO L276 IsEmpty]: Start isEmpty. Operand 6655 states and 25045 transitions. [2021-06-06 00:29:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:24,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:24,488 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:24,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-06 00:29:24,689 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-06-06 00:29:24,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:24,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469897549] [2021-06-06 00:29:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:24,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:24,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469897549] [2021-06-06 00:29:24,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469897549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:24,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145208143] [2021-06-06 00:29:24,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:24,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:29:24,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:24,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:24,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:24,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145208143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:24,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:24,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:29:24,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172366645] [2021-06-06 00:29:24,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:29:24,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:24,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:29:24,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:29:24,809 INFO L87 Difference]: Start difference. First operand 6655 states and 25045 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:25,452 INFO L93 Difference]: Finished difference Result 13667 states and 47756 transitions. [2021-06-06 00:29:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:29:25,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:25,476 INFO L225 Difference]: With dead ends: 13667 [2021-06-06 00:29:25,476 INFO L226 Difference]: Without dead ends: 13667 [2021-06-06 00:29:25,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:29:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13667 states. [2021-06-06 00:29:25,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13667 to 7331. [2021-06-06 00:29:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7331 states, 7330 states have (on average 3.781718963165075) internal successors, (27720), 7330 states have internal predecessors, (27720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7331 states to 7331 states and 27720 transitions. [2021-06-06 00:29:25,642 INFO L78 Accepts]: Start accepts. Automaton has 7331 states and 27720 transitions. Word has length 28 [2021-06-06 00:29:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:25,642 INFO L482 AbstractCegarLoop]: Abstraction has 7331 states and 27720 transitions. [2021-06-06 00:29:25,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 7331 states and 27720 transitions. [2021-06-06 00:29:25,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:25,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:25,652 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:25,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-06 00:29:25,852 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:25,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:25,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-06-06 00:29:25,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:25,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024894365] [2021-06-06 00:29:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:25,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:25,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024894365] [2021-06-06 00:29:25,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024894365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:25,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529902841] [2021-06-06 00:29:25,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:25,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:25,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:25,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:25,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:25,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529902841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:25,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:25,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-06 00:29:25,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550379863] [2021-06-06 00:29:25,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:29:25,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:25,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:29:25,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:29:25,961 INFO L87 Difference]: Start difference. First operand 7331 states and 27720 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:26,532 INFO L93 Difference]: Finished difference Result 13813 states and 48320 transitions. [2021-06-06 00:29:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:29:26,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:26,557 INFO L225 Difference]: With dead ends: 13813 [2021-06-06 00:29:26,557 INFO L226 Difference]: Without dead ends: 13813 [2021-06-06 00:29:26,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:29:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13813 states. [2021-06-06 00:29:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13813 to 7615. [2021-06-06 00:29:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7615 states, 7614 states have (on average 3.7583399001838718) internal successors, (28616), 7614 states have internal predecessors, (28616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7615 states to 7615 states and 28616 transitions. [2021-06-06 00:29:26,759 INFO L78 Accepts]: Start accepts. Automaton has 7615 states and 28616 transitions. Word has length 28 [2021-06-06 00:29:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:26,759 INFO L482 AbstractCegarLoop]: Abstraction has 7615 states and 28616 transitions. [2021-06-06 00:29:26,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 7615 states and 28616 transitions. [2021-06-06 00:29:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:26,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:26,770 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:26,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-06 00:29:26,970 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:26,971 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-06-06 00:29:26,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:26,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265405567] [2021-06-06 00:29:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:26,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:26,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265405567] [2021-06-06 00:29:26,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265405567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:26,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470975335] [2021-06-06 00:29:26,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:27,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:29:27,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:27,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:29:27,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:27,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470975335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:27,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:27,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:29:27,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680689410] [2021-06-06 00:29:27,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:29:27,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:27,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:29:27,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:29:27,069 INFO L87 Difference]: Start difference. First operand 7615 states and 28616 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:27,382 INFO L93 Difference]: Finished difference Result 10157 states and 36733 transitions. [2021-06-06 00:29:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:29:27,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:27,399 INFO L225 Difference]: With dead ends: 10157 [2021-06-06 00:29:27,399 INFO L226 Difference]: Without dead ends: 10127 [2021-06-06 00:29:27,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:29:27,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10127 states. [2021-06-06 00:29:27,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10127 to 8471. [2021-06-06 00:29:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8471 states, 8470 states have (on average 3.7805194805194806) internal successors, (32021), 8470 states have internal predecessors, (32021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 32021 transitions. [2021-06-06 00:29:27,549 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 32021 transitions. Word has length 28 [2021-06-06 00:29:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:27,549 INFO L482 AbstractCegarLoop]: Abstraction has 8471 states and 32021 transitions. [2021-06-06 00:29:27,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 32021 transitions. [2021-06-06 00:29:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:27,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:27,560 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:27,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:27,761 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:27,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-06-06 00:29:27,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:27,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034722276] [2021-06-06 00:29:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:27,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:27,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034722276] [2021-06-06 00:29:27,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034722276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:27,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904199720] [2021-06-06 00:29:27,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:27,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:29:27,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:27,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:29:27,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:27,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904199720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:27,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:27,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:29:27,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633780023] [2021-06-06 00:29:27,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:29:27,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:27,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:29:27,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:29:27,863 INFO L87 Difference]: Start difference. First operand 8471 states and 32021 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:28,168 INFO L93 Difference]: Finished difference Result 10767 states and 38758 transitions. [2021-06-06 00:29:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:29:28,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:28,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:28,186 INFO L225 Difference]: With dead ends: 10767 [2021-06-06 00:29:28,186 INFO L226 Difference]: Without dead ends: 10767 [2021-06-06 00:29:28,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:29:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2021-06-06 00:29:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 8511. [2021-06-06 00:29:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8511 states, 8510 states have (on average 3.7767332549941246) internal successors, (32140), 8510 states have internal predecessors, (32140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8511 states to 8511 states and 32140 transitions. [2021-06-06 00:29:28,363 INFO L78 Accepts]: Start accepts. Automaton has 8511 states and 32140 transitions. Word has length 28 [2021-06-06 00:29:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:28,363 INFO L482 AbstractCegarLoop]: Abstraction has 8511 states and 32140 transitions. [2021-06-06 00:29:28,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 8511 states and 32140 transitions. [2021-06-06 00:29:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:28,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:28,375 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:28,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-06 00:29:28,575 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:28,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:28,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-06-06 00:29:28,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:28,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470447309] [2021-06-06 00:29:28,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:28,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:28,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470447309] [2021-06-06 00:29:28,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470447309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:28,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653785555] [2021-06-06 00:29:28,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:28,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:28,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:28,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653785555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:28,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:28,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-06 00:29:28,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772222358] [2021-06-06 00:29:28,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:29:28,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:28,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:29:28,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:29:28,680 INFO L87 Difference]: Start difference. First operand 8511 states and 32140 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:29,229 INFO L93 Difference]: Finished difference Result 14516 states and 51666 transitions. [2021-06-06 00:29:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:29:29,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:29,258 INFO L225 Difference]: With dead ends: 14516 [2021-06-06 00:29:29,258 INFO L226 Difference]: Without dead ends: 14512 [2021-06-06 00:29:29,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:29:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2021-06-06 00:29:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 8415. [2021-06-06 00:29:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8415 states, 8414 states have (on average 3.7803660565723796) internal successors, (31808), 8414 states have internal predecessors, (31808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8415 states to 8415 states and 31808 transitions. [2021-06-06 00:29:29,446 INFO L78 Accepts]: Start accepts. Automaton has 8415 states and 31808 transitions. Word has length 28 [2021-06-06 00:29:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:29,446 INFO L482 AbstractCegarLoop]: Abstraction has 8415 states and 31808 transitions. [2021-06-06 00:29:29,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 8415 states and 31808 transitions. [2021-06-06 00:29:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:29,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:29,458 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:29,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:29,658 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:29,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:29,659 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-06-06 00:29:29,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:29,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779802195] [2021-06-06 00:29:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:29,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:29,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779802195] [2021-06-06 00:29:29,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779802195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:29,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44681955] [2021-06-06 00:29:29,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:29,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:29,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:29,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:29:29,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:29,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44681955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:29,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:29,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:29:29,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868155399] [2021-06-06 00:29:29,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:29:29,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:29,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:29:29,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:29:29,782 INFO L87 Difference]: Start difference. First operand 8415 states and 31808 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:30,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:30,183 INFO L93 Difference]: Finished difference Result 10984 states and 39553 transitions. [2021-06-06 00:29:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:29:30,183 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:30,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:30,202 INFO L225 Difference]: With dead ends: 10984 [2021-06-06 00:29:30,202 INFO L226 Difference]: Without dead ends: 10984 [2021-06-06 00:29:30,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:29:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2021-06-06 00:29:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 8331. [2021-06-06 00:29:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.7750300120048017) internal successors, (31446), 8330 states have internal predecessors, (31446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:30,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31446 transitions. [2021-06-06 00:29:30,348 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31446 transitions. Word has length 28 [2021-06-06 00:29:30,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:30,348 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31446 transitions. [2021-06-06 00:29:30,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31446 transitions. [2021-06-06 00:29:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:30,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:30,360 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:30,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:30,560 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:30,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-06-06 00:29:30,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:30,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735069000] [2021-06-06 00:29:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:30,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:30,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735069000] [2021-06-06 00:29:30,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735069000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:30,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067271143] [2021-06-06 00:29:30,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:30,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:29:30,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:30,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:30,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:30,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067271143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:30,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:30,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:29:30,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472609883] [2021-06-06 00:29:30,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:29:30,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:30,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:29:30,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:29:30,670 INFO L87 Difference]: Start difference. First operand 8331 states and 31446 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:31,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:31,258 INFO L93 Difference]: Finished difference Result 14367 states and 51050 transitions. [2021-06-06 00:29:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:29:31,259 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:31,285 INFO L225 Difference]: With dead ends: 14367 [2021-06-06 00:29:31,285 INFO L226 Difference]: Without dead ends: 14355 [2021-06-06 00:29:31,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:29:31,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-06-06 00:29:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 8331. [2021-06-06 00:29:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.7740696278511403) internal successors, (31438), 8330 states have internal predecessors, (31438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31438 transitions. [2021-06-06 00:29:31,527 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31438 transitions. Word has length 28 [2021-06-06 00:29:31,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:31,527 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31438 transitions. [2021-06-06 00:29:31,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31438 transitions. [2021-06-06 00:29:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:31,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:31,539 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:31,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:31,740 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:31,740 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-06-06 00:29:31,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:31,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42224654] [2021-06-06 00:29:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:31,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:31,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42224654] [2021-06-06 00:29:31,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42224654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:31,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071467420] [2021-06-06 00:29:31,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:31,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:31,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:31,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:31,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:31,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071467420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:31,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:31,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:29:31,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473358779] [2021-06-06 00:29:31,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:29:31,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:31,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:29:31,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:29:31,875 INFO L87 Difference]: Start difference. First operand 8331 states and 31438 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:32,939 INFO L93 Difference]: Finished difference Result 22154 states and 77423 transitions. [2021-06-06 00:29:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-06 00:29:32,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:32,980 INFO L225 Difference]: With dead ends: 22154 [2021-06-06 00:29:32,981 INFO L226 Difference]: Without dead ends: 22154 [2021-06-06 00:29:32,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:29:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22154 states. [2021-06-06 00:29:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22154 to 11512. [2021-06-06 00:29:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11512 states, 11511 states have (on average 3.8206063765094256) internal successors, (43979), 11511 states have internal predecessors, (43979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11512 states to 11512 states and 43979 transitions. [2021-06-06 00:29:33,323 INFO L78 Accepts]: Start accepts. Automaton has 11512 states and 43979 transitions. Word has length 28 [2021-06-06 00:29:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:33,323 INFO L482 AbstractCegarLoop]: Abstraction has 11512 states and 43979 transitions. [2021-06-06 00:29:33,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 11512 states and 43979 transitions. [2021-06-06 00:29:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:33,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:33,340 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:33,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-06-06 00:29:33,604 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:33,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:33,604 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-06-06 00:29:33,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:33,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907174398] [2021-06-06 00:29:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:33,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:33,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907174398] [2021-06-06 00:29:33,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907174398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:33,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266094834] [2021-06-06 00:29:33,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:33,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:29:33,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:33,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:33,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266094834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:33,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:33,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:29:33,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503780466] [2021-06-06 00:29:33,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:29:33,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:33,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:29:33,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:29:33,759 INFO L87 Difference]: Start difference. First operand 11512 states and 43979 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:34,727 INFO L93 Difference]: Finished difference Result 21281 states and 75167 transitions. [2021-06-06 00:29:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:29:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:34,771 INFO L225 Difference]: With dead ends: 21281 [2021-06-06 00:29:34,771 INFO L226 Difference]: Without dead ends: 21269 [2021-06-06 00:29:34,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 578.8ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:29:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21269 states. [2021-06-06 00:29:35,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21269 to 11342. [2021-06-06 00:29:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11342 states, 11341 states have (on average 3.8255885724362932) internal successors, (43386), 11341 states have internal predecessors, (43386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11342 states to 11342 states and 43386 transitions. [2021-06-06 00:29:35,091 INFO L78 Accepts]: Start accepts. Automaton has 11342 states and 43386 transitions. Word has length 28 [2021-06-06 00:29:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:35,091 INFO L482 AbstractCegarLoop]: Abstraction has 11342 states and 43386 transitions. [2021-06-06 00:29:35,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 11342 states and 43386 transitions. [2021-06-06 00:29:35,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:35,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:35,107 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:35,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:35,308 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:35,308 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-06-06 00:29:35,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:35,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383799713] [2021-06-06 00:29:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:35,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:35,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383799713] [2021-06-06 00:29:35,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383799713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:35,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479578288] [2021-06-06 00:29:35,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:35,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:29:35,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:35,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:35,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:35,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479578288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:35,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:35,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:29:35,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256390575] [2021-06-06 00:29:35,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:29:35,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:35,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:29:35,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:29:35,432 INFO L87 Difference]: Start difference. First operand 11342 states and 43386 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:36,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:36,375 INFO L93 Difference]: Finished difference Result 21160 states and 74599 transitions. [2021-06-06 00:29:36,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:29:36,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:36,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:36,415 INFO L225 Difference]: With dead ends: 21160 [2021-06-06 00:29:36,415 INFO L226 Difference]: Without dead ends: 21124 [2021-06-06 00:29:36,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 505.3ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:29:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21124 states. [2021-06-06 00:29:36,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21124 to 11386. [2021-06-06 00:29:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11386 states, 11385 states have (on average 3.824681598594642) internal successors, (43544), 11385 states have internal predecessors, (43544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11386 states to 11386 states and 43544 transitions. [2021-06-06 00:29:36,727 INFO L78 Accepts]: Start accepts. Automaton has 11386 states and 43544 transitions. Word has length 28 [2021-06-06 00:29:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:36,727 INFO L482 AbstractCegarLoop]: Abstraction has 11386 states and 43544 transitions. [2021-06-06 00:29:36,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 11386 states and 43544 transitions. [2021-06-06 00:29:36,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:36,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:36,744 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:36,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-06 00:29:36,944 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:36,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:36,946 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-06-06 00:29:36,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:36,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033498583] [2021-06-06 00:29:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:36,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:36,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033498583] [2021-06-06 00:29:36,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033498583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:36,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114615379] [2021-06-06 00:29:36,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:37,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:37,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:37,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114615379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:37,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:37,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:29:37,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750509256] [2021-06-06 00:29:37,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:37,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:37,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:37,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:37,100 INFO L87 Difference]: Start difference. First operand 11386 states and 43544 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:38,454 INFO L93 Difference]: Finished difference Result 20907 states and 73951 transitions. [2021-06-06 00:29:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-06 00:29:38,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:38,495 INFO L225 Difference]: With dead ends: 20907 [2021-06-06 00:29:38,495 INFO L226 Difference]: Without dead ends: 20907 [2021-06-06 00:29:38,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 806.2ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:29:38,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20907 states. [2021-06-06 00:29:38,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20907 to 11582. [2021-06-06 00:29:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11582 states, 11581 states have (on average 3.8160780588895604) internal successors, (44194), 11581 states have internal predecessors, (44194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11582 states to 11582 states and 44194 transitions. [2021-06-06 00:29:38,799 INFO L78 Accepts]: Start accepts. Automaton has 11582 states and 44194 transitions. Word has length 28 [2021-06-06 00:29:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:38,799 INFO L482 AbstractCegarLoop]: Abstraction has 11582 states and 44194 transitions. [2021-06-06 00:29:38,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 11582 states and 44194 transitions. [2021-06-06 00:29:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:38,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:38,816 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:39,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-06 00:29:39,016 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:39,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-06-06 00:29:39,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:39,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117072773] [2021-06-06 00:29:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:39,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:39,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117072773] [2021-06-06 00:29:39,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117072773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:39,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327420988] [2021-06-06 00:29:39,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:39,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:39,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:39,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:39,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:39,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327420988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:39,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:39,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:29:39,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875279389] [2021-06-06 00:29:39,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:39,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:39,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:39,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:39,177 INFO L87 Difference]: Start difference. First operand 11582 states and 44194 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:40,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:40,295 INFO L93 Difference]: Finished difference Result 20368 states and 72482 transitions. [2021-06-06 00:29:40,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:29:40,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:40,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:40,331 INFO L225 Difference]: With dead ends: 20368 [2021-06-06 00:29:40,332 INFO L226 Difference]: Without dead ends: 20356 [2021-06-06 00:29:40,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 700.7ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:29:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-06-06 00:29:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 11460. [2021-06-06 00:29:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11460 states, 11459 states have (on average 3.8197923029932803) internal successors, (43771), 11459 states have internal predecessors, (43771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11460 states to 11460 states and 43771 transitions. [2021-06-06 00:29:40,650 INFO L78 Accepts]: Start accepts. Automaton has 11460 states and 43771 transitions. Word has length 28 [2021-06-06 00:29:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:40,650 INFO L482 AbstractCegarLoop]: Abstraction has 11460 states and 43771 transitions. [2021-06-06 00:29:40,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 11460 states and 43771 transitions. [2021-06-06 00:29:40,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:40,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:40,666 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:40,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-06 00:29:40,867 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:40,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-06-06 00:29:40,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:40,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398824172] [2021-06-06 00:29:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:40,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:40,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398824172] [2021-06-06 00:29:40,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398824172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:40,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828392854] [2021-06-06 00:29:40,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:40,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:29:40,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:40,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:40,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:40,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828392854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:40,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:40,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-06 00:29:40,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540293840] [2021-06-06 00:29:40,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:29:40,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:40,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:29:40,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:29:40,995 INFO L87 Difference]: Start difference. First operand 11460 states and 43771 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:41,907 INFO L93 Difference]: Finished difference Result 19606 states and 70387 transitions. [2021-06-06 00:29:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:29:41,908 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:41,944 INFO L225 Difference]: With dead ends: 19606 [2021-06-06 00:29:41,944 INFO L226 Difference]: Without dead ends: 19570 [2021-06-06 00:29:41,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 530.2ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:29:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19570 states. [2021-06-06 00:29:42,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19570 to 11484. [2021-06-06 00:29:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 3.818775581294087) internal successors, (43851), 11483 states have internal predecessors, (43851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 43851 transitions. [2021-06-06 00:29:42,211 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 43851 transitions. Word has length 28 [2021-06-06 00:29:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:42,211 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 43851 transitions. [2021-06-06 00:29:42,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 43851 transitions. [2021-06-06 00:29:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:42,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:42,227 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:42,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-06 00:29:42,428 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:42,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-06-06 00:29:42,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:42,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042096418] [2021-06-06 00:29:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:42,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:42,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042096418] [2021-06-06 00:29:42,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042096418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:42,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063961718] [2021-06-06 00:29:42,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:42,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:42,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:42,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:42,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:42,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063961718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:42,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:42,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:29:42,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992086348] [2021-06-06 00:29:42,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:42,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:42,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:42,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:42,570 INFO L87 Difference]: Start difference. First operand 11484 states and 43851 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:43,734 INFO L93 Difference]: Finished difference Result 28641 states and 102323 transitions. [2021-06-06 00:29:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-06 00:29:43,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:43,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:43,793 INFO L225 Difference]: With dead ends: 28641 [2021-06-06 00:29:43,794 INFO L226 Difference]: Without dead ends: 28641 [2021-06-06 00:29:43,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 707.2ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-06 00:29:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28641 states. [2021-06-06 00:29:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28641 to 11831. [2021-06-06 00:29:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11831 states, 11830 states have (on average 3.8459002535925615) internal successors, (45497), 11830 states have internal predecessors, (45497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11831 states to 11831 states and 45497 transitions. [2021-06-06 00:29:44,164 INFO L78 Accepts]: Start accepts. Automaton has 11831 states and 45497 transitions. Word has length 28 [2021-06-06 00:29:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:44,164 INFO L482 AbstractCegarLoop]: Abstraction has 11831 states and 45497 transitions. [2021-06-06 00:29:44,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 11831 states and 45497 transitions. [2021-06-06 00:29:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:44,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:44,181 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:44,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-06 00:29:44,381 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-06-06 00:29:44,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:44,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566679442] [2021-06-06 00:29:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:44,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:44,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566679442] [2021-06-06 00:29:44,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566679442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:44,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976358554] [2021-06-06 00:29:44,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:44,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:29:44,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:44,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:44,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976358554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:44,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:44,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:29:44,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318070472] [2021-06-06 00:29:44,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:44,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:44,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:44,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:44,527 INFO L87 Difference]: Start difference. First operand 11831 states and 45497 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:45,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:45,690 INFO L93 Difference]: Finished difference Result 28095 states and 101100 transitions. [2021-06-06 00:29:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-06 00:29:45,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:45,749 INFO L225 Difference]: With dead ends: 28095 [2021-06-06 00:29:45,749 INFO L226 Difference]: Without dead ends: 28095 [2021-06-06 00:29:45,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 706.8ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:29:45,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28095 states. [2021-06-06 00:29:46,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28095 to 11720. [2021-06-06 00:29:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11720 states, 11719 states have (on average 3.833176892226299) internal successors, (44921), 11719 states have internal predecessors, (44921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11720 states to 11720 states and 44921 transitions. [2021-06-06 00:29:46,117 INFO L78 Accepts]: Start accepts. Automaton has 11720 states and 44921 transitions. Word has length 28 [2021-06-06 00:29:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:46,117 INFO L482 AbstractCegarLoop]: Abstraction has 11720 states and 44921 transitions. [2021-06-06 00:29:46,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 11720 states and 44921 transitions. [2021-06-06 00:29:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:46,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:46,134 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:46,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-06 00:29:46,335 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:46,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-06-06 00:29:46,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:46,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322062327] [2021-06-06 00:29:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:46,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:46,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322062327] [2021-06-06 00:29:46,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322062327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:46,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055340857] [2021-06-06 00:29:46,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:46,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:29:46,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:46,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:46,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055340857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:46,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:46,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:29:46,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898651318] [2021-06-06 00:29:46,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:29:46,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:46,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:29:46,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:29:46,484 INFO L87 Difference]: Start difference. First operand 11720 states and 44921 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:47,215 INFO L93 Difference]: Finished difference Result 22250 states and 80381 transitions. [2021-06-06 00:29:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:29:47,215 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:47,258 INFO L225 Difference]: With dead ends: 22250 [2021-06-06 00:29:47,258 INFO L226 Difference]: Without dead ends: 22250 [2021-06-06 00:29:47,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:29:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22250 states. [2021-06-06 00:29:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22250 to 11729. [2021-06-06 00:29:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11729 states, 11728 states have (on average 3.8321964529331516) internal successors, (44944), 11728 states have internal predecessors, (44944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11729 states to 11729 states and 44944 transitions. [2021-06-06 00:29:47,622 INFO L78 Accepts]: Start accepts. Automaton has 11729 states and 44944 transitions. Word has length 28 [2021-06-06 00:29:47,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:47,623 INFO L482 AbstractCegarLoop]: Abstraction has 11729 states and 44944 transitions. [2021-06-06 00:29:47,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 11729 states and 44944 transitions. [2021-06-06 00:29:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:47,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:47,640 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:47,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:47,841 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:47,841 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-06-06 00:29:47,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:47,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161793469] [2021-06-06 00:29:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:47,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:47,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161793469] [2021-06-06 00:29:47,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161793469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:47,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096376986] [2021-06-06 00:29:47,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:47,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:47,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:47,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096376986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:47,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:47,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:29:47,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74021769] [2021-06-06 00:29:47,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:29:47,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:47,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:29:47,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:29:47,990 INFO L87 Difference]: Start difference. First operand 11729 states and 44944 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:48,724 INFO L93 Difference]: Finished difference Result 20609 states and 75141 transitions. [2021-06-06 00:29:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:29:48,724 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:48,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:48,764 INFO L225 Difference]: With dead ends: 20609 [2021-06-06 00:29:48,765 INFO L226 Difference]: Without dead ends: 20609 [2021-06-06 00:29:48,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:29:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20609 states. [2021-06-06 00:29:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20609 to 11741. [2021-06-06 00:29:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11741 states, 11740 states have (on average 3.831516183986371) internal successors, (44982), 11740 states have internal predecessors, (44982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11741 states to 11741 states and 44982 transitions. [2021-06-06 00:29:49,060 INFO L78 Accepts]: Start accepts. Automaton has 11741 states and 44982 transitions. Word has length 28 [2021-06-06 00:29:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:49,060 INFO L482 AbstractCegarLoop]: Abstraction has 11741 states and 44982 transitions. [2021-06-06 00:29:49,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand 11741 states and 44982 transitions. [2021-06-06 00:29:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:49,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:49,077 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:49,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:49,277 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:49,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-06-06 00:29:49,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:49,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389692407] [2021-06-06 00:29:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:49,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:49,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389692407] [2021-06-06 00:29:49,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389692407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:49,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718494946] [2021-06-06 00:29:49,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:49,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:49,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:49,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:49,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718494946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:49,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:49,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:29:49,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869947035] [2021-06-06 00:29:49,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:49,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:49,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:49,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:49,454 INFO L87 Difference]: Start difference. First operand 11741 states and 44982 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:50,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:50,483 INFO L93 Difference]: Finished difference Result 21392 states and 77378 transitions. [2021-06-06 00:29:50,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-06 00:29:50,483 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:50,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:50,523 INFO L225 Difference]: With dead ends: 21392 [2021-06-06 00:29:50,523 INFO L226 Difference]: Without dead ends: 21392 [2021-06-06 00:29:50,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 620.8ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-06 00:29:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21392 states. [2021-06-06 00:29:50,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21392 to 11849. [2021-06-06 00:29:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11849 states, 11848 states have (on average 3.824780553679946) internal successors, (45316), 11848 states have internal predecessors, (45316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11849 states to 11849 states and 45316 transitions. [2021-06-06 00:29:50,825 INFO L78 Accepts]: Start accepts. Automaton has 11849 states and 45316 transitions. Word has length 28 [2021-06-06 00:29:50,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:50,825 INFO L482 AbstractCegarLoop]: Abstraction has 11849 states and 45316 transitions. [2021-06-06 00:29:50,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:50,825 INFO L276 IsEmpty]: Start isEmpty. Operand 11849 states and 45316 transitions. [2021-06-06 00:29:50,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:50,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:50,841 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:51,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:51,042 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:51,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:51,042 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-06-06 00:29:51,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:51,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041550512] [2021-06-06 00:29:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:51,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:51,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041550512] [2021-06-06 00:29:51,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041550512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:51,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926143441] [2021-06-06 00:29:51,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:51,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:29:51,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:51,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:51,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926143441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:51,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:51,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:29:51,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742546172] [2021-06-06 00:29:51,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:51,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:51,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:51,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:51,179 INFO L87 Difference]: Start difference. First operand 11849 states and 45316 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:52,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:52,011 INFO L93 Difference]: Finished difference Result 20773 states and 75674 transitions. [2021-06-06 00:29:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:29:52,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:52,051 INFO L225 Difference]: With dead ends: 20773 [2021-06-06 00:29:52,051 INFO L226 Difference]: Without dead ends: 20769 [2021-06-06 00:29:52,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 510.6ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:29:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20769 states. [2021-06-06 00:29:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20769 to 11775. [2021-06-06 00:29:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11775 states, 11774 states have (on average 3.8285204688296246) internal successors, (45077), 11774 states have internal predecessors, (45077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11775 states to 11775 states and 45077 transitions. [2021-06-06 00:29:52,346 INFO L78 Accepts]: Start accepts. Automaton has 11775 states and 45077 transitions. Word has length 28 [2021-06-06 00:29:52,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:52,346 INFO L482 AbstractCegarLoop]: Abstraction has 11775 states and 45077 transitions. [2021-06-06 00:29:52,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:52,346 INFO L276 IsEmpty]: Start isEmpty. Operand 11775 states and 45077 transitions. [2021-06-06 00:29:52,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:52,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:52,363 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:52,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:52,564 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:52,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-06-06 00:29:52,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:52,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310595774] [2021-06-06 00:29:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:52,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:52,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310595774] [2021-06-06 00:29:52,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310595774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:52,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193135494] [2021-06-06 00:29:52,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:52,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:52,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:52,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:52,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:52,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193135494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:52,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:52,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:29:52,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131212120] [2021-06-06 00:29:52,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:52,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:52,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:52,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:52,724 INFO L87 Difference]: Start difference. First operand 11775 states and 45077 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:53,746 INFO L93 Difference]: Finished difference Result 20078 states and 72439 transitions. [2021-06-06 00:29:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:29:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:53,783 INFO L225 Difference]: With dead ends: 20078 [2021-06-06 00:29:53,783 INFO L226 Difference]: Without dead ends: 20078 [2021-06-06 00:29:53,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 598.8ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:29:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20078 states. [2021-06-06 00:29:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20078 to 12002. [2021-06-06 00:29:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12002 states, 12001 states have (on average 3.8309307557703525) internal successors, (45975), 12001 states have internal predecessors, (45975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12002 states to 12002 states and 45975 transitions. [2021-06-06 00:29:54,077 INFO L78 Accepts]: Start accepts. Automaton has 12002 states and 45975 transitions. Word has length 28 [2021-06-06 00:29:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:54,077 INFO L482 AbstractCegarLoop]: Abstraction has 12002 states and 45975 transitions. [2021-06-06 00:29:54,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 12002 states and 45975 transitions. [2021-06-06 00:29:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:54,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:54,095 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:54,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-06 00:29:54,295 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:54,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:54,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-06-06 00:29:54,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:54,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15530556] [2021-06-06 00:29:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:54,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:54,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15530556] [2021-06-06 00:29:54,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15530556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:54,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590100507] [2021-06-06 00:29:54,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:54,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:29:54,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:54,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:54,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:54,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590100507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:54,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:54,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:29:54,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851229545] [2021-06-06 00:29:54,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:54,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:54,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:54,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:54,432 INFO L87 Difference]: Start difference. First operand 12002 states and 45975 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:55,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:55,275 INFO L93 Difference]: Finished difference Result 19609 states and 71148 transitions. [2021-06-06 00:29:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:29:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:55,315 INFO L225 Difference]: With dead ends: 19609 [2021-06-06 00:29:55,315 INFO L226 Difference]: Without dead ends: 19597 [2021-06-06 00:29:55,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:29:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19597 states. [2021-06-06 00:29:55,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19597 to 12104. [2021-06-06 00:29:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 3.825332562174667) internal successors, (46298), 12103 states have internal predecessors, (46298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 46298 transitions. [2021-06-06 00:29:55,602 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 46298 transitions. Word has length 28 [2021-06-06 00:29:55,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:55,602 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 46298 transitions. [2021-06-06 00:29:55,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:55,602 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 46298 transitions. [2021-06-06 00:29:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:55,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:55,685 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:55,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-06 00:29:55,886 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:55,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:55,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 77 times [2021-06-06 00:29:55,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:55,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818671119] [2021-06-06 00:29:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:55,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:55,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818671119] [2021-06-06 00:29:55,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818671119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:55,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472765586] [2021-06-06 00:29:55,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:55,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:29:55,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:55,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:55,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:56,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472765586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:56,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:56,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:29:56,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800311909] [2021-06-06 00:29:56,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:29:56,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:56,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:29:56,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:29:56,004 INFO L87 Difference]: Start difference. First operand 12104 states and 46298 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:56,416 INFO L93 Difference]: Finished difference Result 17019 states and 63218 transitions. [2021-06-06 00:29:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:29:56,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:56,451 INFO L225 Difference]: With dead ends: 17019 [2021-06-06 00:29:56,451 INFO L226 Difference]: Without dead ends: 17019 [2021-06-06 00:29:56,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:29:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17019 states. [2021-06-06 00:29:56,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17019 to 12176. [2021-06-06 00:29:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 12175 states have (on average 3.820780287474333) internal successors, (46518), 12175 states have internal predecessors, (46518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 46518 transitions. [2021-06-06 00:29:56,695 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 46518 transitions. Word has length 28 [2021-06-06 00:29:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:56,695 INFO L482 AbstractCegarLoop]: Abstraction has 12176 states and 46518 transitions. [2021-06-06 00:29:56,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 46518 transitions. [2021-06-06 00:29:56,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:56,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:56,713 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:56,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-06 00:29:56,914 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:56,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:56,914 INFO L82 PathProgramCache]: Analyzing trace with hash 149924120, now seen corresponding path program 78 times [2021-06-06 00:29:56,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:56,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706783322] [2021-06-06 00:29:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:29:56,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706783322] [2021-06-06 00:29:56,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706783322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241655039] [2021-06-06 00:29:56,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:56,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:29:56,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:56,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:56,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:57,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241655039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:57,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:57,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-06 00:29:57,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498672036] [2021-06-06 00:29:57,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:57,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:57,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:57,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:57,051 INFO L87 Difference]: Start difference. First operand 12176 states and 46518 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:57,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:57,428 INFO L93 Difference]: Finished difference Result 15313 states and 56647 transitions. [2021-06-06 00:29:57,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:29:57,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:57,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:57,459 INFO L225 Difference]: With dead ends: 15313 [2021-06-06 00:29:57,459 INFO L226 Difference]: Without dead ends: 15262 [2021-06-06 00:29:57,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:29:57,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15262 states. [2021-06-06 00:29:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15262 to 11819. [2021-06-06 00:29:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11819 states, 11818 states have (on average 3.8123201895413774) internal successors, (45054), 11818 states have internal predecessors, (45054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11819 states to 11819 states and 45054 transitions. [2021-06-06 00:29:57,674 INFO L78 Accepts]: Start accepts. Automaton has 11819 states and 45054 transitions. Word has length 28 [2021-06-06 00:29:57,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:57,674 INFO L482 AbstractCegarLoop]: Abstraction has 11819 states and 45054 transitions. [2021-06-06 00:29:57,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 11819 states and 45054 transitions. [2021-06-06 00:29:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:57,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:57,690 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:57,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-06 00:29:57,891 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:57,891 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 79 times [2021-06-06 00:29:57,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:57,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796109329] [2021-06-06 00:29:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:57,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:57,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796109329] [2021-06-06 00:29:57,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796109329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:57,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759644026] [2021-06-06 00:29:57,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:57,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:57,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:58,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759644026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:58,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:58,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:29:58,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122823737] [2021-06-06 00:29:58,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:29:58,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:58,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:29:58,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:29:58,000 INFO L87 Difference]: Start difference. First operand 11819 states and 45054 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:58,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:58,512 INFO L93 Difference]: Finished difference Result 17677 states and 64654 transitions. [2021-06-06 00:29:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:29:58,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:58,543 INFO L225 Difference]: With dead ends: 17677 [2021-06-06 00:29:58,543 INFO L226 Difference]: Without dead ends: 17677 [2021-06-06 00:29:58,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:29:58,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17677 states. [2021-06-06 00:29:58,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17677 to 12133. [2021-06-06 00:29:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12133 states, 12132 states have (on average 3.7958292120013186) internal successors, (46051), 12132 states have internal predecessors, (46051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12133 states to 12133 states and 46051 transitions. [2021-06-06 00:29:58,785 INFO L78 Accepts]: Start accepts. Automaton has 12133 states and 46051 transitions. Word has length 28 [2021-06-06 00:29:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:58,785 INFO L482 AbstractCegarLoop]: Abstraction has 12133 states and 46051 transitions. [2021-06-06 00:29:58,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 12133 states and 46051 transitions. [2021-06-06 00:29:58,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:58,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:58,802 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:59,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:59,003 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:59,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:59,003 INFO L82 PathProgramCache]: Analyzing trace with hash -119803620, now seen corresponding path program 80 times [2021-06-06 00:29:59,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:59,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695264715] [2021-06-06 00:29:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:59,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:59,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695264715] [2021-06-06 00:29:59,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695264715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:59,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762474065] [2021-06-06 00:29:59,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:59,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:59,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:59,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:29:59,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:59,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762474065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:59,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:59,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-06 00:29:59,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468070124] [2021-06-06 00:29:59,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:29:59,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:59,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:29:59,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:29:59,140 INFO L87 Difference]: Start difference. First operand 12133 states and 46051 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:59,595 INFO L93 Difference]: Finished difference Result 16906 states and 62799 transitions. [2021-06-06 00:29:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:29:59,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:29:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:59,627 INFO L225 Difference]: With dead ends: 16906 [2021-06-06 00:29:59,627 INFO L226 Difference]: Without dead ends: 16896 [2021-06-06 00:29:59,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:59,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16896 states. [2021-06-06 00:29:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16896 to 14164. [2021-06-06 00:29:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14164 states, 14163 states have (on average 3.8308268022311656) internal successors, (54256), 14163 states have internal predecessors, (54256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14164 states to 14164 states and 54256 transitions. [2021-06-06 00:29:59,895 INFO L78 Accepts]: Start accepts. Automaton has 14164 states and 54256 transitions. Word has length 28 [2021-06-06 00:29:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:59,895 INFO L482 AbstractCegarLoop]: Abstraction has 14164 states and 54256 transitions. [2021-06-06 00:29:59,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 14164 states and 54256 transitions. [2021-06-06 00:29:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:29:59,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:59,916 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:00,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-06 00:30:00,117 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 81 times [2021-06-06 00:30:00,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:00,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55702539] [2021-06-06 00:30:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:00,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:00,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55702539] [2021-06-06 00:30:00,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55702539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:00,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122273326] [2021-06-06 00:30:00,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:00,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:30:00,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:00,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:00,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:00,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122273326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:00,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:00,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:30:00,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536224631] [2021-06-06 00:30:00,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:30:00,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:00,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:30:00,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:30:00,221 INFO L87 Difference]: Start difference. First operand 14164 states and 54256 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:00,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:00,609 INFO L93 Difference]: Finished difference Result 19420 states and 72451 transitions. [2021-06-06 00:30:00,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:30:00,609 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:00,647 INFO L225 Difference]: With dead ends: 19420 [2021-06-06 00:30:00,647 INFO L226 Difference]: Without dead ends: 19412 [2021-06-06 00:30:00,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:30:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19412 states. [2021-06-06 00:30:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19412 to 14084. [2021-06-06 00:30:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14084 states, 14083 states have (on average 3.8335581907264076) internal successors, (53988), 14083 states have internal predecessors, (53988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14084 states to 14084 states and 53988 transitions. [2021-06-06 00:30:01,021 INFO L78 Accepts]: Start accepts. Automaton has 14084 states and 53988 transitions. Word has length 28 [2021-06-06 00:30:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:01,021 INFO L482 AbstractCegarLoop]: Abstraction has 14084 states and 53988 transitions. [2021-06-06 00:30:01,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 14084 states and 53988 transitions. [2021-06-06 00:30:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:01,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:01,042 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:01,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:01,243 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:01,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:01,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 82 times [2021-06-06 00:30:01,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:01,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747942056] [2021-06-06 00:30:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:01,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:01,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747942056] [2021-06-06 00:30:01,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747942056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:01,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340353177] [2021-06-06 00:30:01,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:01,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:30:01,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:01,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:01,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:01,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340353177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:01,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:01,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:30:01,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121652578] [2021-06-06 00:30:01,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:30:01,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:01,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:30:01,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:30:01,361 INFO L87 Difference]: Start difference. First operand 14084 states and 53988 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:01,819 INFO L93 Difference]: Finished difference Result 19300 states and 72099 transitions. [2021-06-06 00:30:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:30:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:01,866 INFO L225 Difference]: With dead ends: 19300 [2021-06-06 00:30:01,866 INFO L226 Difference]: Without dead ends: 19288 [2021-06-06 00:30:01,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:30:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19288 states. [2021-06-06 00:30:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19288 to 14050. [2021-06-06 00:30:02,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 14049 states have (on average 3.835504306356324) internal successors, (53885), 14049 states have internal predecessors, (53885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 53885 transitions. [2021-06-06 00:30:02,191 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 53885 transitions. Word has length 28 [2021-06-06 00:30:02,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:02,191 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 53885 transitions. [2021-06-06 00:30:02,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 53885 transitions. [2021-06-06 00:30:02,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:02,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:02,213 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:02,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:02,430 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:02,430 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 83 times [2021-06-06 00:30:02,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:02,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346677118] [2021-06-06 00:30:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:02,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:02,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346677118] [2021-06-06 00:30:02,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346677118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:02,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111306843] [2021-06-06 00:30:02,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:02,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:30:02,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:02,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:02,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:02,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111306843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:02,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:02,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:30:02,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285187406] [2021-06-06 00:30:02,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:30:02,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:02,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:30:02,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:30:02,579 INFO L87 Difference]: Start difference. First operand 14050 states and 53885 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:03,469 INFO L93 Difference]: Finished difference Result 26192 states and 94663 transitions. [2021-06-06 00:30:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:30:03,470 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:03,529 INFO L225 Difference]: With dead ends: 26192 [2021-06-06 00:30:03,529 INFO L226 Difference]: Without dead ends: 26192 [2021-06-06 00:30:03,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:30:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26192 states. [2021-06-06 00:30:03,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26192 to 14026. [2021-06-06 00:30:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14026 states, 14025 states have (on average 3.834652406417112) internal successors, (53781), 14025 states have internal predecessors, (53781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14026 states to 14026 states and 53781 transitions. [2021-06-06 00:30:03,872 INFO L78 Accepts]: Start accepts. Automaton has 14026 states and 53781 transitions. Word has length 28 [2021-06-06 00:30:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:03,873 INFO L482 AbstractCegarLoop]: Abstraction has 14026 states and 53781 transitions. [2021-06-06 00:30:03,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 14026 states and 53781 transitions. [2021-06-06 00:30:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:03,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:03,968 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:04,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:04,173 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-06-06 00:30:04,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:04,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884005472] [2021-06-06 00:30:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:04,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:04,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884005472] [2021-06-06 00:30:04,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884005472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:04,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059139433] [2021-06-06 00:30:04,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:04,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:30:04,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:04,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:04,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:04,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059139433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:04,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:04,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:30:04,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741140492] [2021-06-06 00:30:04,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:30:04,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:04,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:30:04,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:30:04,312 INFO L87 Difference]: Start difference. First operand 14026 states and 53781 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:04,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:04,983 INFO L93 Difference]: Finished difference Result 21930 states and 80131 transitions. [2021-06-06 00:30:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:30:04,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:05,025 INFO L225 Difference]: With dead ends: 21930 [2021-06-06 00:30:05,025 INFO L226 Difference]: Without dead ends: 21917 [2021-06-06 00:30:05,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:30:05,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21917 states. [2021-06-06 00:30:05,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21917 to 15540. [2021-06-06 00:30:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15540 states, 15539 states have (on average 3.8934294356136174) internal successors, (60500), 15539 states have internal predecessors, (60500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15540 states to 15540 states and 60500 transitions. [2021-06-06 00:30:05,368 INFO L78 Accepts]: Start accepts. Automaton has 15540 states and 60500 transitions. Word has length 28 [2021-06-06 00:30:05,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:05,368 INFO L482 AbstractCegarLoop]: Abstraction has 15540 states and 60500 transitions. [2021-06-06 00:30:05,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 15540 states and 60500 transitions. [2021-06-06 00:30:05,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:05,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:05,390 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:05,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:05,591 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:05,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:05,591 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-06-06 00:30:05,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:05,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184318295] [2021-06-06 00:30:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:05,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:05,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184318295] [2021-06-06 00:30:05,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184318295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:05,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799125484] [2021-06-06 00:30:05,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:05,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:05,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799125484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:05,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:05,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:30:05,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449974553] [2021-06-06 00:30:05,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:30:05,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:05,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:30:05,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:30:05,736 INFO L87 Difference]: Start difference. First operand 15540 states and 60500 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:06,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:06,506 INFO L93 Difference]: Finished difference Result 22091 states and 80578 transitions. [2021-06-06 00:30:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:30:06,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:06,548 INFO L225 Difference]: With dead ends: 22091 [2021-06-06 00:30:06,548 INFO L226 Difference]: Without dead ends: 22076 [2021-06-06 00:30:06,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 424.9ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:30:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22076 states. [2021-06-06 00:30:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22076 to 15507. [2021-06-06 00:30:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15507 states, 15506 states have (on average 3.892428737262995) internal successors, (60356), 15506 states have internal predecessors, (60356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15507 states to 15507 states and 60356 transitions. [2021-06-06 00:30:06,924 INFO L78 Accepts]: Start accepts. Automaton has 15507 states and 60356 transitions. Word has length 28 [2021-06-06 00:30:06,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:06,924 INFO L482 AbstractCegarLoop]: Abstraction has 15507 states and 60356 transitions. [2021-06-06 00:30:06,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:06,925 INFO L276 IsEmpty]: Start isEmpty. Operand 15507 states and 60356 transitions. [2021-06-06 00:30:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:06,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:06,948 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:07,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:07,149 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:07,149 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-06-06 00:30:07,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:07,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001505411] [2021-06-06 00:30:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:07,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:07,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001505411] [2021-06-06 00:30:07,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001505411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:07,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922848556] [2021-06-06 00:30:07,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:07,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:30:07,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:07,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:07,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:07,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922848556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:07,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:07,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:30:07,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892730582] [2021-06-06 00:30:07,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:30:07,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:07,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:30:07,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:30:07,371 INFO L87 Difference]: Start difference. First operand 15507 states and 60356 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:07,955 INFO L93 Difference]: Finished difference Result 25101 states and 91625 transitions. [2021-06-06 00:30:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:30:07,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:08,007 INFO L225 Difference]: With dead ends: 25101 [2021-06-06 00:30:08,008 INFO L226 Difference]: Without dead ends: 25088 [2021-06-06 00:30:08,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:30:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25088 states. [2021-06-06 00:30:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25088 to 15601. [2021-06-06 00:30:08,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15601 states, 15600 states have (on average 3.8981410256410256) internal successors, (60811), 15600 states have internal predecessors, (60811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15601 states to 15601 states and 60811 transitions. [2021-06-06 00:30:08,439 INFO L78 Accepts]: Start accepts. Automaton has 15601 states and 60811 transitions. Word has length 28 [2021-06-06 00:30:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:08,439 INFO L482 AbstractCegarLoop]: Abstraction has 15601 states and 60811 transitions. [2021-06-06 00:30:08,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 15601 states and 60811 transitions. [2021-06-06 00:30:08,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:08,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:08,462 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:08,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-06 00:30:08,663 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:08,663 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-06-06 00:30:08,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:08,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228569268] [2021-06-06 00:30:08,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:08,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:08,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228569268] [2021-06-06 00:30:08,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228569268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:08,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256527768] [2021-06-06 00:30:08,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:08,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:30:08,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:08,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:08,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:08,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256527768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:08,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:08,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:30:08,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919063398] [2021-06-06 00:30:08,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:30:08,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:08,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:30:08,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:30:08,787 INFO L87 Difference]: Start difference. First operand 15601 states and 60811 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:09,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:09,459 INFO L93 Difference]: Finished difference Result 26885 states and 97285 transitions. [2021-06-06 00:30:09,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:30:09,460 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:09,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:09,520 INFO L225 Difference]: With dead ends: 26885 [2021-06-06 00:30:09,520 INFO L226 Difference]: Without dead ends: 26885 [2021-06-06 00:30:09,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:30:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26885 states. [2021-06-06 00:30:09,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26885 to 15654. [2021-06-06 00:30:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15654 states, 15653 states have (on average 3.894397240145659) internal successors, (60959), 15653 states have internal predecessors, (60959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15654 states to 15654 states and 60959 transitions. [2021-06-06 00:30:09,948 INFO L78 Accepts]: Start accepts. Automaton has 15654 states and 60959 transitions. Word has length 28 [2021-06-06 00:30:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:09,948 INFO L482 AbstractCegarLoop]: Abstraction has 15654 states and 60959 transitions. [2021-06-06 00:30:09,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 15654 states and 60959 transitions. [2021-06-06 00:30:09,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:09,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:09,972 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:10,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-06 00:30:10,177 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:10,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:10,177 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 84 times [2021-06-06 00:30:10,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:10,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931617584] [2021-06-06 00:30:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:10,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:10,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931617584] [2021-06-06 00:30:10,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931617584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:10,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656311628] [2021-06-06 00:30:10,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:10,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:30:10,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:10,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:10,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656311628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:10,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:10,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:30:10,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39690975] [2021-06-06 00:30:10,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:30:10,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:10,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:30:10,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:30:10,412 INFO L87 Difference]: Start difference. First operand 15654 states and 60959 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:11,287 INFO L93 Difference]: Finished difference Result 26297 states and 97911 transitions. [2021-06-06 00:30:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:30:11,288 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:11,349 INFO L225 Difference]: With dead ends: 26297 [2021-06-06 00:30:11,349 INFO L226 Difference]: Without dead ends: 26293 [2021-06-06 00:30:11,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:30:11,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26293 states. [2021-06-06 00:30:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26293 to 15950. [2021-06-06 00:30:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15950 states, 15949 states have (on average 3.8838171672205153) internal successors, (61943), 15949 states have internal predecessors, (61943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 61943 transitions. [2021-06-06 00:30:11,765 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 61943 transitions. Word has length 28 [2021-06-06 00:30:11,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:11,765 INFO L482 AbstractCegarLoop]: Abstraction has 15950 states and 61943 transitions. [2021-06-06 00:30:11,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:11,765 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 61943 transitions. [2021-06-06 00:30:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:11,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:11,790 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:11,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-06 00:30:11,991 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:11,991 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-06-06 00:30:11,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:11,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362394040] [2021-06-06 00:30:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:12,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:12,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362394040] [2021-06-06 00:30:12,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362394040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:12,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378980654] [2021-06-06 00:30:12,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:12,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:30:12,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:12,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:12,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:12,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378980654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:12,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:12,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:30:12,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795007317] [2021-06-06 00:30:12,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:30:12,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:12,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:30:12,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:30:12,104 INFO L87 Difference]: Start difference. First operand 15950 states and 61943 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:12,723 INFO L93 Difference]: Finished difference Result 23295 states and 86571 transitions. [2021-06-06 00:30:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:30:12,724 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:12,769 INFO L225 Difference]: With dead ends: 23295 [2021-06-06 00:30:12,769 INFO L226 Difference]: Without dead ends: 23272 [2021-06-06 00:30:12,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:30:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23272 states. [2021-06-06 00:30:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23272 to 16091. [2021-06-06 00:30:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16091 states, 16090 states have (on average 3.89608452454941) internal successors, (62688), 16090 states have internal predecessors, (62688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16091 states to 16091 states and 62688 transitions. [2021-06-06 00:30:13,252 INFO L78 Accepts]: Start accepts. Automaton has 16091 states and 62688 transitions. Word has length 28 [2021-06-06 00:30:13,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:13,252 INFO L482 AbstractCegarLoop]: Abstraction has 16091 states and 62688 transitions. [2021-06-06 00:30:13,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 16091 states and 62688 transitions. [2021-06-06 00:30:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:13,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:13,275 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:13,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-06 00:30:13,476 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:13,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:13,476 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-06-06 00:30:13,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:13,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580643470] [2021-06-06 00:30:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:13,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:13,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580643470] [2021-06-06 00:30:13,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580643470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:13,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246160487] [2021-06-06 00:30:13,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:13,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:30:13,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:13,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:13,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246160487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:13,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:13,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:30:13,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114574666] [2021-06-06 00:30:13,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:30:13,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:30:13,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:30:13,704 INFO L87 Difference]: Start difference. First operand 16091 states and 62688 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:14,491 INFO L93 Difference]: Finished difference Result 22857 states and 83754 transitions. [2021-06-06 00:30:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:30:14,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:14,540 INFO L225 Difference]: With dead ends: 22857 [2021-06-06 00:30:14,540 INFO L226 Difference]: Without dead ends: 22857 [2021-06-06 00:30:14,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:30:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22857 states. [2021-06-06 00:30:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22857 to 16206. [2021-06-06 00:30:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16206 states, 16205 states have (on average 3.8883677877198397) internal successors, (63011), 16205 states have internal predecessors, (63011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16206 states to 16206 states and 63011 transitions. [2021-06-06 00:30:14,935 INFO L78 Accepts]: Start accepts. Automaton has 16206 states and 63011 transitions. Word has length 28 [2021-06-06 00:30:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:14,935 INFO L482 AbstractCegarLoop]: Abstraction has 16206 states and 63011 transitions. [2021-06-06 00:30:14,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 16206 states and 63011 transitions. [2021-06-06 00:30:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:14,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:14,957 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:15,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:15,158 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:15,158 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-06-06 00:30:15,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:15,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555883756] [2021-06-06 00:30:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:15,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:15,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555883756] [2021-06-06 00:30:15,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555883756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:15,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842533650] [2021-06-06 00:30:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:15,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:30:15,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:15,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:15,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:15,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842533650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:15,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:15,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:30:15,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957292748] [2021-06-06 00:30:15,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:30:15,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:15,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:30:15,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:30:15,330 INFO L87 Difference]: Start difference. First operand 16206 states and 63011 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:15,962 INFO L93 Difference]: Finished difference Result 25358 states and 93325 transitions. [2021-06-06 00:30:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:30:15,962 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:15,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:16,015 INFO L225 Difference]: With dead ends: 25358 [2021-06-06 00:30:16,016 INFO L226 Difference]: Without dead ends: 25358 [2021-06-06 00:30:16,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:30:16,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25358 states. [2021-06-06 00:30:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25358 to 17371. [2021-06-06 00:30:16,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.8704663212435233) internal successors, (67230), 17370 states have internal predecessors, (67230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 67230 transitions. [2021-06-06 00:30:16,387 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 67230 transitions. Word has length 28 [2021-06-06 00:30:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:16,387 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 67230 transitions. [2021-06-06 00:30:16,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:16,388 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 67230 transitions. [2021-06-06 00:30:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:16,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:16,411 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:16,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:16,613 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:16,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:16,613 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-06-06 00:30:16,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:16,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674867426] [2021-06-06 00:30:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:16,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:16,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674867426] [2021-06-06 00:30:16,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674867426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:16,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681077821] [2021-06-06 00:30:16,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:16,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:16,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:16,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681077821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:16,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:16,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:30:16,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135903348] [2021-06-06 00:30:16,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:30:16,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:16,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:30:16,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:30:16,733 INFO L87 Difference]: Start difference. First operand 17371 states and 67230 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:17,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:17,581 INFO L93 Difference]: Finished difference Result 28661 states and 104016 transitions. [2021-06-06 00:30:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:30:17,581 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:17,650 INFO L225 Difference]: With dead ends: 28661 [2021-06-06 00:30:17,650 INFO L226 Difference]: Without dead ends: 28661 [2021-06-06 00:30:17,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:30:17,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28661 states. [2021-06-06 00:30:17,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28661 to 17617. [2021-06-06 00:30:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17617 states, 17616 states have (on average 3.8848773841961854) internal successors, (68436), 17616 states have internal predecessors, (68436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17617 states to 17617 states and 68436 transitions. [2021-06-06 00:30:18,048 INFO L78 Accepts]: Start accepts. Automaton has 17617 states and 68436 transitions. Word has length 28 [2021-06-06 00:30:18,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:18,049 INFO L482 AbstractCegarLoop]: Abstraction has 17617 states and 68436 transitions. [2021-06-06 00:30:18,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 17617 states and 68436 transitions. [2021-06-06 00:30:18,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:18,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:18,073 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:18,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-06 00:30:18,274 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:18,274 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 85 times [2021-06-06 00:30:18,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:18,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113995651] [2021-06-06 00:30:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:18,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:18,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113995651] [2021-06-06 00:30:18,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113995651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:18,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433325419] [2021-06-06 00:30:18,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:18,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:18,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433325419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:18,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:18,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:30:18,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381653082] [2021-06-06 00:30:18,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:30:18,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:18,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:30:18,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:30:18,428 INFO L87 Difference]: Start difference. First operand 17617 states and 68436 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:19,816 INFO L93 Difference]: Finished difference Result 45772 states and 165843 transitions. [2021-06-06 00:30:19,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:30:19,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:19,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:19,916 INFO L225 Difference]: With dead ends: 45772 [2021-06-06 00:30:19,916 INFO L226 Difference]: Without dead ends: 45772 [2021-06-06 00:30:19,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 824.4ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:30:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45772 states. [2021-06-06 00:30:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45772 to 18979. [2021-06-06 00:30:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18979 states, 18978 states have (on average 3.92285804615871) internal successors, (74448), 18978 states have internal predecessors, (74448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18979 states to 18979 states and 74448 transitions. [2021-06-06 00:30:20,569 INFO L78 Accepts]: Start accepts. Automaton has 18979 states and 74448 transitions. Word has length 28 [2021-06-06 00:30:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:20,569 INFO L482 AbstractCegarLoop]: Abstraction has 18979 states and 74448 transitions. [2021-06-06 00:30:20,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 18979 states and 74448 transitions. [2021-06-06 00:30:20,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:20,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:20,596 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:20,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:20,797 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 86 times [2021-06-06 00:30:20,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:20,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543799158] [2021-06-06 00:30:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:20,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:20,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543799158] [2021-06-06 00:30:20,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543799158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:20,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527077048] [2021-06-06 00:30:20,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:20,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:30:20,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:20,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:20,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:21,035 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-06 00:30:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:21,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527077048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:21,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:21,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:30:21,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243389800] [2021-06-06 00:30:21,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:30:21,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:21,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:30:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:30:21,051 INFO L87 Difference]: Start difference. First operand 18979 states and 74448 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:22,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:22,429 INFO L93 Difference]: Finished difference Result 44697 states and 163047 transitions. [2021-06-06 00:30:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:30:22,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:22,524 INFO L225 Difference]: With dead ends: 44697 [2021-06-06 00:30:22,525 INFO L226 Difference]: Without dead ends: 44697 [2021-06-06 00:30:22,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 819.5ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:30:22,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44697 states. [2021-06-06 00:30:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44697 to 18947. [2021-06-06 00:30:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18947 states, 18946 states have (on average 3.919771983532144) internal successors, (74264), 18946 states have internal predecessors, (74264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18947 states to 18947 states and 74264 transitions. [2021-06-06 00:30:23,226 INFO L78 Accepts]: Start accepts. Automaton has 18947 states and 74264 transitions. Word has length 28 [2021-06-06 00:30:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:23,226 INFO L482 AbstractCegarLoop]: Abstraction has 18947 states and 74264 transitions. [2021-06-06 00:30:23,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 18947 states and 74264 transitions. [2021-06-06 00:30:23,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:23,254 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:23,254 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:23,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:23,454 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:23,455 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-06-06 00:30:23,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:23,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942436227] [2021-06-06 00:30:23,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:23,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:23,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942436227] [2021-06-06 00:30:23,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942436227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:23,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610700289] [2021-06-06 00:30:23,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:23,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:30:23,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:23,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:23,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:23,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610700289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:23,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:23,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:30:23,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838876282] [2021-06-06 00:30:23,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:30:23,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:23,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:30:23,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:30:23,555 INFO L87 Difference]: Start difference. First operand 18947 states and 74264 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:23,863 INFO L93 Difference]: Finished difference Result 30407 states and 117873 transitions. [2021-06-06 00:30:23,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:30:23,863 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:23,931 INFO L225 Difference]: With dead ends: 30407 [2021-06-06 00:30:23,931 INFO L226 Difference]: Without dead ends: 30360 [2021-06-06 00:30:23,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:30:23,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30360 states. [2021-06-06 00:30:24,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30360 to 24152. [2021-06-06 00:30:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24152 states, 24151 states have (on average 3.923150180116765) internal successors, (94748), 24151 states have internal predecessors, (94748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24152 states to 24152 states and 94748 transitions. [2021-06-06 00:30:24,498 INFO L78 Accepts]: Start accepts. Automaton has 24152 states and 94748 transitions. Word has length 28 [2021-06-06 00:30:24,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:24,498 INFO L482 AbstractCegarLoop]: Abstraction has 24152 states and 94748 transitions. [2021-06-06 00:30:24,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 24152 states and 94748 transitions. [2021-06-06 00:30:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:24,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:24,530 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:24,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:24,730 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:24,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:24,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-06-06 00:30:24,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:24,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952268308] [2021-06-06 00:30:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:24,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:24,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952268308] [2021-06-06 00:30:24,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952268308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:24,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13956732] [2021-06-06 00:30:24,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:24,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:30:24,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:24,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:24,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:24,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13956732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:24,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:24,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:30:24,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419085107] [2021-06-06 00:30:24,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:30:24,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:24,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:30:24,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:30:24,842 INFO L87 Difference]: Start difference. First operand 24152 states and 94748 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:25,093 INFO L93 Difference]: Finished difference Result 26900 states and 103096 transitions. [2021-06-06 00:30:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:30:25,093 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:25,155 INFO L225 Difference]: With dead ends: 26900 [2021-06-06 00:30:25,156 INFO L226 Difference]: Without dead ends: 26900 [2021-06-06 00:30:25,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:30:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26900 states. [2021-06-06 00:30:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26900 to 23655. [2021-06-06 00:30:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23655 states, 23654 states have (on average 3.913756658493278) internal successors, (92576), 23654 states have internal predecessors, (92576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23655 states to 23655 states and 92576 transitions. [2021-06-06 00:30:25,606 INFO L78 Accepts]: Start accepts. Automaton has 23655 states and 92576 transitions. Word has length 28 [2021-06-06 00:30:25,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:25,606 INFO L482 AbstractCegarLoop]: Abstraction has 23655 states and 92576 transitions. [2021-06-06 00:30:25,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 23655 states and 92576 transitions. [2021-06-06 00:30:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:25,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:25,638 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:25,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:25,838 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:25,839 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-06-06 00:30:25,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:25,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781845487] [2021-06-06 00:30:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:25,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:25,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781845487] [2021-06-06 00:30:25,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781845487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:25,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260753704] [2021-06-06 00:30:25,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:25,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:30:25,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:25,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:25,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:25,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260753704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:25,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:25,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-06 00:30:25,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193467354] [2021-06-06 00:30:25,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:30:25,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:25,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:30:25,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:30:25,974 INFO L87 Difference]: Start difference. First operand 23655 states and 92576 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:26,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:26,757 INFO L93 Difference]: Finished difference Result 36284 states and 135440 transitions. [2021-06-06 00:30:26,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:30:26,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:26,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:26,834 INFO L225 Difference]: With dead ends: 36284 [2021-06-06 00:30:26,835 INFO L226 Difference]: Without dead ends: 36284 [2021-06-06 00:30:26,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:30:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36284 states. [2021-06-06 00:30:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36284 to 23725. [2021-06-06 00:30:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23725 states, 23724 states have (on average 3.911819254763109) internal successors, (92804), 23724 states have internal predecessors, (92804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23725 states to 23725 states and 92804 transitions. [2021-06-06 00:30:27,555 INFO L78 Accepts]: Start accepts. Automaton has 23725 states and 92804 transitions. Word has length 28 [2021-06-06 00:30:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:27,555 INFO L482 AbstractCegarLoop]: Abstraction has 23725 states and 92804 transitions. [2021-06-06 00:30:27,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 23725 states and 92804 transitions. [2021-06-06 00:30:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:27,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:27,590 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:27,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:27,791 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:27,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:27,791 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-06-06 00:30:27,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:27,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670821054] [2021-06-06 00:30:27,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:27,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:27,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670821054] [2021-06-06 00:30:27,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670821054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:27,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514691450] [2021-06-06 00:30:27,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:27,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:30:27,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:27,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:27,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514691450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:27,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:27,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:30:27,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120239459] [2021-06-06 00:30:27,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:30:27,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:27,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:30:27,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:30:27,938 INFO L87 Difference]: Start difference. First operand 23725 states and 92804 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:29,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:29,299 INFO L93 Difference]: Finished difference Result 46767 states and 172486 transitions. [2021-06-06 00:30:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:30:29,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:29,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:29,406 INFO L225 Difference]: With dead ends: 46767 [2021-06-06 00:30:29,406 INFO L226 Difference]: Without dead ends: 46767 [2021-06-06 00:30:29,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 811.1ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-06 00:30:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46767 states. [2021-06-06 00:30:30,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46767 to 23724. [2021-06-06 00:30:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23724 states, 23723 states have (on average 3.913670277789487) internal successors, (92844), 23723 states have internal predecessors, (92844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23724 states to 23724 states and 92844 transitions. [2021-06-06 00:30:30,097 INFO L78 Accepts]: Start accepts. Automaton has 23724 states and 92844 transitions. Word has length 28 [2021-06-06 00:30:30,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:30,097 INFO L482 AbstractCegarLoop]: Abstraction has 23724 states and 92844 transitions. [2021-06-06 00:30:30,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:30,097 INFO L276 IsEmpty]: Start isEmpty. Operand 23724 states and 92844 transitions. [2021-06-06 00:30:30,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:30,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:30,129 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:30,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-06 00:30:30,329 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:30,329 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-06-06 00:30:30,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:30,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022146625] [2021-06-06 00:30:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:30,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:30,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022146625] [2021-06-06 00:30:30,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022146625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:30,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15754345] [2021-06-06 00:30:30,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:30,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:30:30,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:30,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:30,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:30,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15754345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:30,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:30,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:30:30,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425202845] [2021-06-06 00:30:30,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:30:30,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:30,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:30:30,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:30:30,469 INFO L87 Difference]: Start difference. First operand 23724 states and 92844 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:31,931 INFO L93 Difference]: Finished difference Result 46491 states and 172131 transitions. [2021-06-06 00:30:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:30:31,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:32,044 INFO L225 Difference]: With dead ends: 46491 [2021-06-06 00:30:32,044 INFO L226 Difference]: Without dead ends: 46491 [2021-06-06 00:30:32,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 866.7ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-06 00:30:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46491 states. [2021-06-06 00:30:32,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46491 to 23508. [2021-06-06 00:30:32,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23508 states, 23507 states have (on average 3.9070064236184967) internal successors, (91842), 23507 states have internal predecessors, (91842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23508 states to 23508 states and 91842 transitions. [2021-06-06 00:30:32,783 INFO L78 Accepts]: Start accepts. Automaton has 23508 states and 91842 transitions. Word has length 28 [2021-06-06 00:30:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:32,783 INFO L482 AbstractCegarLoop]: Abstraction has 23508 states and 91842 transitions. [2021-06-06 00:30:32,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 23508 states and 91842 transitions. [2021-06-06 00:30:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:32,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:32,816 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:33,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-06 00:30:33,016 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:33,017 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-06-06 00:30:33,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:33,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605078698] [2021-06-06 00:30:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:33,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:33,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605078698] [2021-06-06 00:30:33,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605078698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:33,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528720758] [2021-06-06 00:30:33,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:33,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:30:33,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:30:33,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528720758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:33,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:33,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-06 00:30:33,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179931185] [2021-06-06 00:30:33,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:30:33,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:33,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:30:33,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:30:33,115 INFO L87 Difference]: Start difference. First operand 23508 states and 91842 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:33,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:33,378 INFO L93 Difference]: Finished difference Result 35906 states and 134992 transitions. [2021-06-06 00:30:33,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:30:33,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:33,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:33,461 INFO L225 Difference]: With dead ends: 35906 [2021-06-06 00:30:33,461 INFO L226 Difference]: Without dead ends: 35889 [2021-06-06 00:30:33,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:30:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35889 states. [2021-06-06 00:30:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35889 to 23779. [2021-06-06 00:30:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23779 states, 23778 states have (on average 3.911514845655648) internal successors, (93008), 23778 states have internal predecessors, (93008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23779 states to 23779 states and 93008 transitions. [2021-06-06 00:30:33,982 INFO L78 Accepts]: Start accepts. Automaton has 23779 states and 93008 transitions. Word has length 28 [2021-06-06 00:30:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:33,982 INFO L482 AbstractCegarLoop]: Abstraction has 23779 states and 93008 transitions. [2021-06-06 00:30:33,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:33,982 INFO L276 IsEmpty]: Start isEmpty. Operand 23779 states and 93008 transitions. [2021-06-06 00:30:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:34,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:34,021 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:34,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-06 00:30:34,237 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:34,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:34,237 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-06-06 00:30:34,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:34,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133972295] [2021-06-06 00:30:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:34,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:34,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133972295] [2021-06-06 00:30:34,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133972295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:34,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895319298] [2021-06-06 00:30:34,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:34,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:30:34,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:34,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:30:34,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:30:34,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895319298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:34,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:34,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-06 00:30:34,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064891871] [2021-06-06 00:30:34,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:30:34,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:34,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:30:34,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:30:34,340 INFO L87 Difference]: Start difference. First operand 23779 states and 93008 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:34,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:34,620 INFO L93 Difference]: Finished difference Result 38100 states and 141941 transitions. [2021-06-06 00:30:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:30:34,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:34,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:34,706 INFO L225 Difference]: With dead ends: 38100 [2021-06-06 00:30:34,706 INFO L226 Difference]: Without dead ends: 38100 [2021-06-06 00:30:34,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:30:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38100 states. [2021-06-06 00:30:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38100 to 23448. [2021-06-06 00:30:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23448 states, 23447 states have (on average 3.8990915682176825) internal successors, (91422), 23447 states have internal predecessors, (91422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23448 states to 23448 states and 91422 transitions. [2021-06-06 00:30:35,326 INFO L78 Accepts]: Start accepts. Automaton has 23448 states and 91422 transitions. Word has length 28 [2021-06-06 00:30:35,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:35,326 INFO L482 AbstractCegarLoop]: Abstraction has 23448 states and 91422 transitions. [2021-06-06 00:30:35,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:35,326 INFO L276 IsEmpty]: Start isEmpty. Operand 23448 states and 91422 transitions. [2021-06-06 00:30:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:35,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:35,357 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:35,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-06 00:30:35,558 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:35,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-06-06 00:30:35,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:35,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942740520] [2021-06-06 00:30:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:35,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:35,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942740520] [2021-06-06 00:30:35,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942740520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:35,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37966413] [2021-06-06 00:30:35,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:35,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:30:35,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:35,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:35,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:35,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37966413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:35,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:35,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:30:35,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442927165] [2021-06-06 00:30:35,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:30:35,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:35,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:30:35,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:30:35,703 INFO L87 Difference]: Start difference. First operand 23448 states and 91422 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:36,426 INFO L93 Difference]: Finished difference Result 33419 states and 125361 transitions. [2021-06-06 00:30:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:30:36,426 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:36,503 INFO L225 Difference]: With dead ends: 33419 [2021-06-06 00:30:36,503 INFO L226 Difference]: Without dead ends: 33419 [2021-06-06 00:30:36,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:30:36,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33419 states. [2021-06-06 00:30:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33419 to 23496. [2021-06-06 00:30:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23496 states, 23495 states have (on average 3.8977654820174505) internal successors, (91578), 23495 states have internal predecessors, (91578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23496 states to 23496 states and 91578 transitions. [2021-06-06 00:30:37,082 INFO L78 Accepts]: Start accepts. Automaton has 23496 states and 91578 transitions. Word has length 28 [2021-06-06 00:30:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:37,082 INFO L482 AbstractCegarLoop]: Abstraction has 23496 states and 91578 transitions. [2021-06-06 00:30:37,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 23496 states and 91578 transitions. [2021-06-06 00:30:37,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:37,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:37,115 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:37,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-06 00:30:37,333 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-06-06 00:30:37,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:37,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203857655] [2021-06-06 00:30:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:37,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:37,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203857655] [2021-06-06 00:30:37,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203857655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:37,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331426858] [2021-06-06 00:30:37,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:37,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:30:37,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:37,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:37,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:37,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331426858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:37,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:37,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:30:37,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746043809] [2021-06-06 00:30:37,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:30:37,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:37,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:30:37,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:30:37,474 INFO L87 Difference]: Start difference. First operand 23496 states and 91578 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:38,559 INFO L93 Difference]: Finished difference Result 35119 states and 130293 transitions. [2021-06-06 00:30:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:30:38,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:38,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:38,644 INFO L225 Difference]: With dead ends: 35119 [2021-06-06 00:30:38,645 INFO L226 Difference]: Without dead ends: 35119 [2021-06-06 00:30:38,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 616.4ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:30:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35119 states. [2021-06-06 00:30:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35119 to 24060. [2021-06-06 00:30:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24060 states, 24059 states have (on average 3.878964212976433) internal successors, (93324), 24059 states have internal predecessors, (93324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24060 states to 24060 states and 93324 transitions. [2021-06-06 00:30:39,332 INFO L78 Accepts]: Start accepts. Automaton has 24060 states and 93324 transitions. Word has length 28 [2021-06-06 00:30:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:39,332 INFO L482 AbstractCegarLoop]: Abstraction has 24060 states and 93324 transitions. [2021-06-06 00:30:39,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 24060 states and 93324 transitions. [2021-06-06 00:30:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:39,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:39,366 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:39,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:39,567 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:39,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:39,567 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-06-06 00:30:39,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:39,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240842105] [2021-06-06 00:30:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:39,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:39,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240842105] [2021-06-06 00:30:39,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240842105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:39,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18184870] [2021-06-06 00:30:39,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:39,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:30:39,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:39,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:39,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18184870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:39,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:39,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:30:39,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051684027] [2021-06-06 00:30:39,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:30:39,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:39,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:30:39,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:30:39,706 INFO L87 Difference]: Start difference. First operand 24060 states and 93324 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:40,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:40,512 INFO L93 Difference]: Finished difference Result 34157 states and 127778 transitions. [2021-06-06 00:30:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:30:40,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:40,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:40,589 INFO L225 Difference]: With dead ends: 34157 [2021-06-06 00:30:40,589 INFO L226 Difference]: Without dead ends: 34153 [2021-06-06 00:30:40,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 423.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:30:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34153 states. [2021-06-06 00:30:41,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34153 to 23952. [2021-06-06 00:30:41,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23952 states, 23951 states have (on average 3.8814245751743144) internal successors, (92964), 23951 states have internal predecessors, (92964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23952 states to 23952 states and 92964 transitions. [2021-06-06 00:30:41,161 INFO L78 Accepts]: Start accepts. Automaton has 23952 states and 92964 transitions. Word has length 28 [2021-06-06 00:30:41,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:41,162 INFO L482 AbstractCegarLoop]: Abstraction has 23952 states and 92964 transitions. [2021-06-06 00:30:41,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:41,162 INFO L276 IsEmpty]: Start isEmpty. Operand 23952 states and 92964 transitions. [2021-06-06 00:30:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:41,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:41,194 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:41,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-06 00:30:41,395 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:41,395 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-06-06 00:30:41,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:41,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392852287] [2021-06-06 00:30:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:41,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:41,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392852287] [2021-06-06 00:30:41,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392852287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:41,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658904482] [2021-06-06 00:30:41,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:41,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:30:41,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:41,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:30:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:30:41,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658904482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:41,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:41,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-06 00:30:41,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397689789] [2021-06-06 00:30:41,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:30:41,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:41,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:30:41,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:30:41,503 INFO L87 Difference]: Start difference. First operand 23952 states and 92964 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:41,749 INFO L93 Difference]: Finished difference Result 30321 states and 113570 transitions. [2021-06-06 00:30:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:30:41,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:41,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:41,817 INFO L225 Difference]: With dead ends: 30321 [2021-06-06 00:30:41,818 INFO L226 Difference]: Without dead ends: 30321 [2021-06-06 00:30:41,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:30:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30321 states. [2021-06-06 00:30:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30321 to 24262. [2021-06-06 00:30:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24262 states, 24261 states have (on average 3.8735831169366475) internal successors, (93977), 24261 states have internal predecessors, (93977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24262 states to 24262 states and 93977 transitions. [2021-06-06 00:30:42,282 INFO L78 Accepts]: Start accepts. Automaton has 24262 states and 93977 transitions. Word has length 28 [2021-06-06 00:30:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:42,282 INFO L482 AbstractCegarLoop]: Abstraction has 24262 states and 93977 transitions. [2021-06-06 00:30:42,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 24262 states and 93977 transitions. [2021-06-06 00:30:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:42,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:42,314 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:42,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:42,514 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:42,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:42,515 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-06-06 00:30:42,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:42,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672116411] [2021-06-06 00:30:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:42,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:42,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672116411] [2021-06-06 00:30:42,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672116411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:42,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451279284] [2021-06-06 00:30:42,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:42,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:42,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:30:42,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451279284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:42,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:42,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:30:42,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970328371] [2021-06-06 00:30:42,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:30:42,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:42,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:30:42,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:30:42,628 INFO L87 Difference]: Start difference. First operand 24262 states and 93977 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:43,472 INFO L93 Difference]: Finished difference Result 35215 states and 130243 transitions. [2021-06-06 00:30:43,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:30:43,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:43,555 INFO L225 Difference]: With dead ends: 35215 [2021-06-06 00:30:43,555 INFO L226 Difference]: Without dead ends: 35215 [2021-06-06 00:30:43,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:30:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35215 states. [2021-06-06 00:30:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35215 to 26047. [2021-06-06 00:30:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26047 states, 26046 states have (on average 3.8823235813560624) internal successors, (101119), 26046 states have internal predecessors, (101119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 101119 transitions. [2021-06-06 00:30:44,189 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 101119 transitions. Word has length 28 [2021-06-06 00:30:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:44,190 INFO L482 AbstractCegarLoop]: Abstraction has 26047 states and 101119 transitions. [2021-06-06 00:30:44,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:44,190 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 101119 transitions. [2021-06-06 00:30:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:44,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:44,227 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:44,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:44,428 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:44,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:44,428 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-06-06 00:30:44,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:44,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057912153] [2021-06-06 00:30:44,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:44,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:44,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057912153] [2021-06-06 00:30:44,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057912153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:44,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525326062] [2021-06-06 00:30:44,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:44,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:30:44,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:44,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:44,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:30:44,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525326062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:44,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:44,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:30:44,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604842505] [2021-06-06 00:30:44,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:30:44,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:44,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:30:44,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:30:44,541 INFO L87 Difference]: Start difference. First operand 26047 states and 101119 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:45,179 INFO L93 Difference]: Finished difference Result 33427 states and 125631 transitions. [2021-06-06 00:30:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:30:45,180 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:45,253 INFO L225 Difference]: With dead ends: 33427 [2021-06-06 00:30:45,253 INFO L226 Difference]: Without dead ends: 33415 [2021-06-06 00:30:45,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:30:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33415 states. [2021-06-06 00:30:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33415 to 26213. [2021-06-06 00:30:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26213 states, 26212 states have (on average 3.8773081031588585) internal successors, (101632), 26212 states have internal predecessors, (101632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26213 states to 26213 states and 101632 transitions. [2021-06-06 00:30:45,862 INFO L78 Accepts]: Start accepts. Automaton has 26213 states and 101632 transitions. Word has length 28 [2021-06-06 00:30:45,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:45,862 INFO L482 AbstractCegarLoop]: Abstraction has 26213 states and 101632 transitions. [2021-06-06 00:30:45,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:45,862 INFO L276 IsEmpty]: Start isEmpty. Operand 26213 states and 101632 transitions. [2021-06-06 00:30:45,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:45,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:45,898 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:46,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:46,098 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-06-06 00:30:46,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:46,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297805695] [2021-06-06 00:30:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:46,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:46,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297805695] [2021-06-06 00:30:46,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297805695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:46,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212864251] [2021-06-06 00:30:46,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:46,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:30:46,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:46,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:30:46,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:46,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212864251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:46,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:46,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-06 00:30:46,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120207794] [2021-06-06 00:30:46,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:30:46,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:46,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:30:46,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:30:46,202 INFO L87 Difference]: Start difference. First operand 26213 states and 101632 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:46,446 INFO L93 Difference]: Finished difference Result 30773 states and 117208 transitions. [2021-06-06 00:30:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:30:46,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:46,516 INFO L225 Difference]: With dead ends: 30773 [2021-06-06 00:30:46,516 INFO L226 Difference]: Without dead ends: 30773 [2021-06-06 00:30:46,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:30:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30773 states. [2021-06-06 00:30:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30773 to 27420. [2021-06-06 00:30:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27420 states, 27419 states have (on average 3.8735183631788175) internal successors, (106208), 27419 states have internal predecessors, (106208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27420 states to 27420 states and 106208 transitions. [2021-06-06 00:30:47,128 INFO L78 Accepts]: Start accepts. Automaton has 27420 states and 106208 transitions. Word has length 28 [2021-06-06 00:30:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:47,128 INFO L482 AbstractCegarLoop]: Abstraction has 27420 states and 106208 transitions. [2021-06-06 00:30:47,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 27420 states and 106208 transitions. [2021-06-06 00:30:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:47,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:47,171 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:47,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-06 00:30:47,372 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:47,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-06-06 00:30:47,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:47,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353184471] [2021-06-06 00:30:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:47,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:47,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353184471] [2021-06-06 00:30:47,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353184471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:47,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448248805] [2021-06-06 00:30:47,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:47,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:30:47,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:47,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:47,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:47,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448248805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:47,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:47,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:30:47,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093063586] [2021-06-06 00:30:47,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:30:47,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:30:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:30:47,502 INFO L87 Difference]: Start difference. First operand 27420 states and 106208 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:48,200 INFO L93 Difference]: Finished difference Result 35583 states and 132544 transitions. [2021-06-06 00:30:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:30:48,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:48,277 INFO L225 Difference]: With dead ends: 35583 [2021-06-06 00:30:48,277 INFO L226 Difference]: Without dead ends: 35583 [2021-06-06 00:30:48,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:30:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35583 states. [2021-06-06 00:30:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35583 to 28674. [2021-06-06 00:30:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28674 states, 28673 states have (on average 3.842116276636557) internal successors, (110165), 28673 states have internal predecessors, (110165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:48,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28674 states to 28674 states and 110165 transitions. [2021-06-06 00:30:48,917 INFO L78 Accepts]: Start accepts. Automaton has 28674 states and 110165 transitions. Word has length 28 [2021-06-06 00:30:48,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:48,917 INFO L482 AbstractCegarLoop]: Abstraction has 28674 states and 110165 transitions. [2021-06-06 00:30:48,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 28674 states and 110165 transitions. [2021-06-06 00:30:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:48,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:48,960 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:49,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:49,161 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-06-06 00:30:49,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:49,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916957578] [2021-06-06 00:30:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:49,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:49,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916957578] [2021-06-06 00:30:49,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916957578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:49,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362134337] [2021-06-06 00:30:49,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:49,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:30:49,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:49,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:49,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:49,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362134337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:49,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:49,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:30:49,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882150658] [2021-06-06 00:30:49,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:30:49,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:49,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:30:49,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:30:49,272 INFO L87 Difference]: Start difference. First operand 28674 states and 110165 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:49,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:49,884 INFO L93 Difference]: Finished difference Result 34707 states and 130204 transitions. [2021-06-06 00:30:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:30:49,885 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:49,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:49,959 INFO L225 Difference]: With dead ends: 34707 [2021-06-06 00:30:49,959 INFO L226 Difference]: Without dead ends: 34699 [2021-06-06 00:30:49,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:30:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34699 states. [2021-06-06 00:30:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34699 to 28480. [2021-06-06 00:30:50,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28480 states, 28479 states have (on average 3.847958144597774) internal successors, (109586), 28479 states have internal predecessors, (109586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28480 states to 28480 states and 109586 transitions. [2021-06-06 00:30:50,666 INFO L78 Accepts]: Start accepts. Automaton has 28480 states and 109586 transitions. Word has length 28 [2021-06-06 00:30:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:50,667 INFO L482 AbstractCegarLoop]: Abstraction has 28480 states and 109586 transitions. [2021-06-06 00:30:50,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:50,667 INFO L276 IsEmpty]: Start isEmpty. Operand 28480 states and 109586 transitions. [2021-06-06 00:30:50,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:50,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:50,711 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:50,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-06 00:30:50,911 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:50,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:50,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-06-06 00:30:50,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:50,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008343897] [2021-06-06 00:30:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:50,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:50,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008343897] [2021-06-06 00:30:50,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008343897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:50,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279594438] [2021-06-06 00:30:50,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:50,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:30:50,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:50,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:50,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:51,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279594438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:51,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:51,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:30:51,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379538022] [2021-06-06 00:30:51,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:30:51,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:51,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:30:51,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:30:51,019 INFO L87 Difference]: Start difference. First operand 28480 states and 109586 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:51,674 INFO L93 Difference]: Finished difference Result 36567 states and 135873 transitions. [2021-06-06 00:30:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:30:51,674 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:51,752 INFO L225 Difference]: With dead ends: 36567 [2021-06-06 00:30:51,752 INFO L226 Difference]: Without dead ends: 36567 [2021-06-06 00:30:51,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 339.6ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:30:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36567 states. [2021-06-06 00:30:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36567 to 29508. [2021-06-06 00:30:52,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29508 states, 29507 states have (on average 3.8260073880774055) internal successors, (112894), 29507 states have internal predecessors, (112894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29508 states to 29508 states and 112894 transitions. [2021-06-06 00:30:52,409 INFO L78 Accepts]: Start accepts. Automaton has 29508 states and 112894 transitions. Word has length 28 [2021-06-06 00:30:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:52,410 INFO L482 AbstractCegarLoop]: Abstraction has 29508 states and 112894 transitions. [2021-06-06 00:30:52,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:52,410 INFO L276 IsEmpty]: Start isEmpty. Operand 29508 states and 112894 transitions. [2021-06-06 00:30:52,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:52,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:52,453 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:52,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-06 00:30:52,654 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:52,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:52,654 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-06-06 00:30:52,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:52,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350027106] [2021-06-06 00:30:52,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:52,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:52,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350027106] [2021-06-06 00:30:52,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350027106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:52,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252617411] [2021-06-06 00:30:52,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:52,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:52,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252617411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:52,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:52,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-06 00:30:52,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192658580] [2021-06-06 00:30:52,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:30:52,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:30:52,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:30:52,748 INFO L87 Difference]: Start difference. First operand 29508 states and 112894 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:53,086 INFO L93 Difference]: Finished difference Result 35843 states and 136177 transitions. [2021-06-06 00:30:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:30:53,086 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:53,164 INFO L225 Difference]: With dead ends: 35843 [2021-06-06 00:30:53,164 INFO L226 Difference]: Without dead ends: 35830 [2021-06-06 00:30:53,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:30:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35830 states. [2021-06-06 00:30:53,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35830 to 34303. [2021-06-06 00:30:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34303 states, 34302 states have (on average 3.8411171360270537) internal successors, (131758), 34302 states have internal predecessors, (131758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34303 states to 34303 states and 131758 transitions. [2021-06-06 00:30:53,989 INFO L78 Accepts]: Start accepts. Automaton has 34303 states and 131758 transitions. Word has length 28 [2021-06-06 00:30:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:53,989 INFO L482 AbstractCegarLoop]: Abstraction has 34303 states and 131758 transitions. [2021-06-06 00:30:53,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 34303 states and 131758 transitions. [2021-06-06 00:30:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:54,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:54,045 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:54,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-06 00:30:54,246 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:54,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:54,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-06-06 00:30:54,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:54,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422341378] [2021-06-06 00:30:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:54,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:54,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422341378] [2021-06-06 00:30:54,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422341378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:54,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450250836] [2021-06-06 00:30:54,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:54,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:30:54,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:54,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:54,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:54,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450250836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:54,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:54,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-06 00:30:54,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544997116] [2021-06-06 00:30:54,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:30:54,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:54,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:30:54,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:30:54,351 INFO L87 Difference]: Start difference. First operand 34303 states and 131758 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:54,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:54,752 INFO L93 Difference]: Finished difference Result 37460 states and 141660 transitions. [2021-06-06 00:30:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:30:54,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:54,844 INFO L225 Difference]: With dead ends: 37460 [2021-06-06 00:30:54,844 INFO L226 Difference]: Without dead ends: 37460 [2021-06-06 00:30:54,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:30:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37460 states. [2021-06-06 00:30:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37460 to 33980. [2021-06-06 00:30:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33980 states, 33979 states have (on average 3.8373995703228463) internal successors, (130391), 33979 states have internal predecessors, (130391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33980 states to 33980 states and 130391 transitions. [2021-06-06 00:30:55,550 INFO L78 Accepts]: Start accepts. Automaton has 33980 states and 130391 transitions. Word has length 28 [2021-06-06 00:30:55,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:55,550 INFO L482 AbstractCegarLoop]: Abstraction has 33980 states and 130391 transitions. [2021-06-06 00:30:55,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:55,550 INFO L276 IsEmpty]: Start isEmpty. Operand 33980 states and 130391 transitions. [2021-06-06 00:30:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:55,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:55,598 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:55,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:55,799 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-06-06 00:30:55,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:55,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42111905] [2021-06-06 00:30:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:55,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:55,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42111905] [2021-06-06 00:30:55,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42111905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:55,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181348692] [2021-06-06 00:30:55,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:55,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:30:55,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:55,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:55,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:55,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181348692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:55,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:55,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:30:55,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66048161] [2021-06-06 00:30:55,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:30:55,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:55,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:30:55,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:30:55,911 INFO L87 Difference]: Start difference. First operand 33980 states and 130391 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:56,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:56,470 INFO L93 Difference]: Finished difference Result 40756 states and 152783 transitions. [2021-06-06 00:30:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:30:56,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:56,562 INFO L225 Difference]: With dead ends: 40756 [2021-06-06 00:30:56,562 INFO L226 Difference]: Without dead ends: 40748 [2021-06-06 00:30:56,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:30:56,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40748 states. [2021-06-06 00:30:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40748 to 33946. [2021-06-06 00:30:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33946 states, 33945 states have (on average 3.8377964354102225) internal successors, (130274), 33945 states have internal predecessors, (130274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33946 states to 33946 states and 130274 transitions. [2021-06-06 00:30:57,288 INFO L78 Accepts]: Start accepts. Automaton has 33946 states and 130274 transitions. Word has length 28 [2021-06-06 00:30:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:57,288 INFO L482 AbstractCegarLoop]: Abstraction has 33946 states and 130274 transitions. [2021-06-06 00:30:57,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 33946 states and 130274 transitions. [2021-06-06 00:30:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:57,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:57,338 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:57,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-06 00:30:57,549 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:57,549 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-06-06 00:30:57,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:57,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247696073] [2021-06-06 00:30:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:57,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:57,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247696073] [2021-06-06 00:30:57,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247696073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:57,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110672994] [2021-06-06 00:30:57,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:57,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:30:57,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:57,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:30:57,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:57,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110672994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:57,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:57,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-06 00:30:57,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265701076] [2021-06-06 00:30:57,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:30:57,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:57,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:30:57,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:30:57,648 INFO L87 Difference]: Start difference. First operand 33946 states and 130274 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:58,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:58,116 INFO L93 Difference]: Finished difference Result 36862 states and 139999 transitions. [2021-06-06 00:30:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:30:58,117 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:58,197 INFO L225 Difference]: With dead ends: 36862 [2021-06-06 00:30:58,197 INFO L226 Difference]: Without dead ends: 36862 [2021-06-06 00:30:58,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:30:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36862 states. [2021-06-06 00:30:58,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36862 to 34478. [2021-06-06 00:30:58,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34478 states, 34477 states have (on average 3.8361226324796243) internal successors, (132258), 34477 states have internal predecessors, (132258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34478 states to 34478 states and 132258 transitions. [2021-06-06 00:30:58,875 INFO L78 Accepts]: Start accepts. Automaton has 34478 states and 132258 transitions. Word has length 28 [2021-06-06 00:30:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:58,875 INFO L482 AbstractCegarLoop]: Abstraction has 34478 states and 132258 transitions. [2021-06-06 00:30:58,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 34478 states and 132258 transitions. [2021-06-06 00:30:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:30:58,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:58,925 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:59,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:59,125 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-06-06 00:30:59,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:59,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13059612] [2021-06-06 00:30:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:59,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:59,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13059612] [2021-06-06 00:30:59,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13059612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:59,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331291151] [2021-06-06 00:30:59,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:59,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:30:59,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:59,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:30:59,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:30:59,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331291151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:59,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:59,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:30:59,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450413368] [2021-06-06 00:30:59,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:30:59,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:59,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:30:59,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:30:59,229 INFO L87 Difference]: Start difference. First operand 34478 states and 132258 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:59,773 INFO L93 Difference]: Finished difference Result 41641 states and 156125 transitions. [2021-06-06 00:30:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:30:59,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:30:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:59,864 INFO L225 Difference]: With dead ends: 41641 [2021-06-06 00:30:59,865 INFO L226 Difference]: Without dead ends: 41617 [2021-06-06 00:30:59,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:30:59,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41617 states. [2021-06-06 00:31:00,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41617 to 34650. [2021-06-06 00:31:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34650 states, 34649 states have (on average 3.832491558197928) internal successors, (132792), 34649 states have internal predecessors, (132792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34650 states to 34650 states and 132792 transitions. [2021-06-06 00:31:00,599 INFO L78 Accepts]: Start accepts. Automaton has 34650 states and 132792 transitions. Word has length 28 [2021-06-06 00:31:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:00,599 INFO L482 AbstractCegarLoop]: Abstraction has 34650 states and 132792 transitions. [2021-06-06 00:31:00,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 34650 states and 132792 transitions. [2021-06-06 00:31:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:00,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:00,649 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:00,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-06 00:31:00,850 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:00,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:00,850 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-06-06 00:31:00,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:00,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785771711] [2021-06-06 00:31:00,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:00,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:00,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785771711] [2021-06-06 00:31:00,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785771711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:00,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393883418] [2021-06-06 00:31:00,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:00,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:31:00,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:00,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:31:00,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:00,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393883418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:00,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:00,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-06 00:31:00,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640717499] [2021-06-06 00:31:00,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:31:00,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:00,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:31:00,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:31:00,954 INFO L87 Difference]: Start difference. First operand 34650 states and 132792 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:01,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:01,426 INFO L93 Difference]: Finished difference Result 37282 states and 141492 transitions. [2021-06-06 00:31:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:31:01,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:01,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:01,510 INFO L225 Difference]: With dead ends: 37282 [2021-06-06 00:31:01,510 INFO L226 Difference]: Without dead ends: 37282 [2021-06-06 00:31:01,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:31:01,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37282 states. [2021-06-06 00:31:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37282 to 34576. [2021-06-06 00:31:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34576 states, 34575 states have (on average 3.833289949385394) internal successors, (132536), 34575 states have internal predecessors, (132536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34576 states to 34576 states and 132536 transitions. [2021-06-06 00:31:02,274 INFO L78 Accepts]: Start accepts. Automaton has 34576 states and 132536 transitions. Word has length 28 [2021-06-06 00:31:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:02,274 INFO L482 AbstractCegarLoop]: Abstraction has 34576 states and 132536 transitions. [2021-06-06 00:31:02,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 34576 states and 132536 transitions. [2021-06-06 00:31:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:02,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:02,323 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:02,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:02,524 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:02,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:02,524 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-06-06 00:31:02,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:02,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766116362] [2021-06-06 00:31:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:02,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:02,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766116362] [2021-06-06 00:31:02,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766116362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:02,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752012205] [2021-06-06 00:31:02,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:02,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:02,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:02,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752012205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:02,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:02,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:31:02,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077194075] [2021-06-06 00:31:02,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:31:02,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:02,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:31:02,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:31:02,632 INFO L87 Difference]: Start difference. First operand 34576 states and 132536 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:03,245 INFO L93 Difference]: Finished difference Result 41564 states and 155866 transitions. [2021-06-06 00:31:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:31:03,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:03,337 INFO L225 Difference]: With dead ends: 41564 [2021-06-06 00:31:03,337 INFO L226 Difference]: Without dead ends: 41524 [2021-06-06 00:31:03,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:31:03,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41524 states. [2021-06-06 00:31:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41524 to 34750. [2021-06-06 00:31:03,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34750 states, 34749 states have (on average 3.829549051771274) internal successors, (133073), 34749 states have internal predecessors, (133073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34750 states to 34750 states and 133073 transitions. [2021-06-06 00:31:04,089 INFO L78 Accepts]: Start accepts. Automaton has 34750 states and 133073 transitions. Word has length 28 [2021-06-06 00:31:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:04,090 INFO L482 AbstractCegarLoop]: Abstraction has 34750 states and 133073 transitions. [2021-06-06 00:31:04,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:04,090 INFO L276 IsEmpty]: Start isEmpty. Operand 34750 states and 133073 transitions. [2021-06-06 00:31:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:04,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:04,140 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:04,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-06 00:31:04,340 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:04,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-06-06 00:31:04,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:04,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812757580] [2021-06-06 00:31:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:04,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:04,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812757580] [2021-06-06 00:31:04,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812757580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:04,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38211095] [2021-06-06 00:31:04,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:04,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:31:04,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:04,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:04,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:04,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38211095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:04,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:04,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:31:04,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774855519] [2021-06-06 00:31:04,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:31:04,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:04,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:31:04,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:31:04,483 INFO L87 Difference]: Start difference. First operand 34750 states and 133073 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:05,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:05,693 INFO L93 Difference]: Finished difference Result 77130 states and 285331 transitions. [2021-06-06 00:31:05,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:31:05,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:05,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:05,883 INFO L225 Difference]: With dead ends: 77130 [2021-06-06 00:31:05,883 INFO L226 Difference]: Without dead ends: 77130 [2021-06-06 00:31:05,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 605.5ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:31:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77130 states. [2021-06-06 00:31:07,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77130 to 43844. [2021-06-06 00:31:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43844 states, 43843 states have (on average 3.9042264443582786) internal successors, (171173), 43843 states have internal predecessors, (171173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43844 states to 43844 states and 171173 transitions. [2021-06-06 00:31:07,337 INFO L78 Accepts]: Start accepts. Automaton has 43844 states and 171173 transitions. Word has length 28 [2021-06-06 00:31:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:07,337 INFO L482 AbstractCegarLoop]: Abstraction has 43844 states and 171173 transitions. [2021-06-06 00:31:07,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 43844 states and 171173 transitions. [2021-06-06 00:31:07,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:07,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:07,598 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:07,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:07,799 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:07,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-06-06 00:31:07,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:07,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762705897] [2021-06-06 00:31:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:07,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:07,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762705897] [2021-06-06 00:31:07,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762705897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:07,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912888148] [2021-06-06 00:31:07,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:07,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:31:07,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:07,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:07,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:08,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912888148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:08,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:08,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:31:08,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630967066] [2021-06-06 00:31:08,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:31:08,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:08,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:31:08,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:31:08,048 INFO L87 Difference]: Start difference. First operand 43844 states and 171173 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:09,399 INFO L93 Difference]: Finished difference Result 76528 states and 283739 transitions. [2021-06-06 00:31:09,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:31:09,400 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:09,602 INFO L225 Difference]: With dead ends: 76528 [2021-06-06 00:31:09,602 INFO L226 Difference]: Without dead ends: 76528 [2021-06-06 00:31:09,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 727.7ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:31:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76528 states. [2021-06-06 00:31:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76528 to 43841. [2021-06-06 00:31:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43841 states, 43840 states have (on average 3.9041742700729927) internal successors, (171159), 43840 states have internal predecessors, (171159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43841 states to 43841 states and 171159 transitions. [2021-06-06 00:31:11,092 INFO L78 Accepts]: Start accepts. Automaton has 43841 states and 171159 transitions. Word has length 28 [2021-06-06 00:31:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:11,092 INFO L482 AbstractCegarLoop]: Abstraction has 43841 states and 171159 transitions. [2021-06-06 00:31:11,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 43841 states and 171159 transitions. [2021-06-06 00:31:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:11,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:11,284 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:11,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:11,500 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:11,500 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-06-06 00:31:11,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:11,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305757948] [2021-06-06 00:31:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:11,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:11,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305757948] [2021-06-06 00:31:11,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305757948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:11,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135387153] [2021-06-06 00:31:11,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:11,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:31:11,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:11,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:11,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:11,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135387153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:11,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:11,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:31:11,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204336715] [2021-06-06 00:31:11,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:31:11,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:11,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:31:11,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:31:11,631 INFO L87 Difference]: Start difference. First operand 43841 states and 171159 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:12,851 INFO L93 Difference]: Finished difference Result 71140 states and 265637 transitions. [2021-06-06 00:31:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:31:12,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:13,040 INFO L225 Difference]: With dead ends: 71140 [2021-06-06 00:31:13,040 INFO L226 Difference]: Without dead ends: 71140 [2021-06-06 00:31:13,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 508.0ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:31:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71140 states. [2021-06-06 00:31:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71140 to 43865. [2021-06-06 00:31:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43865 states, 43864 states have (on average 3.9044090826190043) internal successors, (171263), 43864 states have internal predecessors, (171263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43865 states to 43865 states and 171263 transitions. [2021-06-06 00:31:14,445 INFO L78 Accepts]: Start accepts. Automaton has 43865 states and 171263 transitions. Word has length 28 [2021-06-06 00:31:14,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:14,445 INFO L482 AbstractCegarLoop]: Abstraction has 43865 states and 171263 transitions. [2021-06-06 00:31:14,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:14,445 INFO L276 IsEmpty]: Start isEmpty. Operand 43865 states and 171263 transitions. [2021-06-06 00:31:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:14,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:14,508 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:14,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-06 00:31:14,709 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:14,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-06-06 00:31:14,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:14,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074254029] [2021-06-06 00:31:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:14,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:14,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074254029] [2021-06-06 00:31:14,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074254029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:14,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453828561] [2021-06-06 00:31:14,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:14,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:31:14,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:15,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453828561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:15,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:15,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:31:15,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967573423] [2021-06-06 00:31:15,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:31:15,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:15,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:31:15,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:31:15,044 INFO L87 Difference]: Start difference. First operand 43865 states and 171263 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:16,181 INFO L93 Difference]: Finished difference Result 70268 states and 263382 transitions. [2021-06-06 00:31:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:31:16,182 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:16,371 INFO L225 Difference]: With dead ends: 70268 [2021-06-06 00:31:16,372 INFO L226 Difference]: Without dead ends: 70260 [2021-06-06 00:31:16,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 647.6ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:31:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70260 states. [2021-06-06 00:31:17,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70260 to 43865. [2021-06-06 00:31:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43865 states, 43864 states have (on average 3.904272296188218) internal successors, (171257), 43864 states have internal predecessors, (171257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43865 states to 43865 states and 171257 transitions. [2021-06-06 00:31:17,824 INFO L78 Accepts]: Start accepts. Automaton has 43865 states and 171257 transitions. Word has length 28 [2021-06-06 00:31:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:17,824 INFO L482 AbstractCegarLoop]: Abstraction has 43865 states and 171257 transitions. [2021-06-06 00:31:17,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 43865 states and 171257 transitions. [2021-06-06 00:31:17,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:17,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:17,887 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:18,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-06 00:31:18,087 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:18,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-06-06 00:31:18,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:18,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011097430] [2021-06-06 00:31:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:18,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:18,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011097430] [2021-06-06 00:31:18,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011097430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:18,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106292617] [2021-06-06 00:31:18,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:18,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:31:18,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:18,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:18,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:18,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106292617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:18,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:18,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:31:18,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895710719] [2021-06-06 00:31:18,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:31:18,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:18,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:31:18,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:31:18,383 INFO L87 Difference]: Start difference. First operand 43865 states and 171257 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:19,679 INFO L93 Difference]: Finished difference Result 69775 states and 262075 transitions. [2021-06-06 00:31:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:31:19,680 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:19,875 INFO L225 Difference]: With dead ends: 69775 [2021-06-06 00:31:19,875 INFO L226 Difference]: Without dead ends: 69775 [2021-06-06 00:31:19,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 530.0ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:31:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69775 states. [2021-06-06 00:31:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69775 to 43873. [2021-06-06 00:31:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43873 states, 43872 states have (on average 3.9043353391684903) internal successors, (171291), 43872 states have internal predecessors, (171291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43873 states to 43873 states and 171291 transitions. [2021-06-06 00:31:21,400 INFO L78 Accepts]: Start accepts. Automaton has 43873 states and 171291 transitions. Word has length 28 [2021-06-06 00:31:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:21,400 INFO L482 AbstractCegarLoop]: Abstraction has 43873 states and 171291 transitions. [2021-06-06 00:31:21,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 43873 states and 171291 transitions. [2021-06-06 00:31:21,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:21,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:21,466 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:21,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-06 00:31:21,667 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:21,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:21,667 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-06-06 00:31:21,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:21,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930843197] [2021-06-06 00:31:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:21,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:21,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930843197] [2021-06-06 00:31:21,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930843197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:21,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478190251] [2021-06-06 00:31:21,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:21,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:21,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:21,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478190251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:21,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:21,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:31:21,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157734227] [2021-06-06 00:31:21,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:31:21,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:21,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:31:21,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:31:21,804 INFO L87 Difference]: Start difference. First operand 43873 states and 171291 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:22,986 INFO L93 Difference]: Finished difference Result 69542 states and 261491 transitions. [2021-06-06 00:31:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:31:22,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:23,186 INFO L225 Difference]: With dead ends: 69542 [2021-06-06 00:31:23,186 INFO L226 Difference]: Without dead ends: 69534 [2021-06-06 00:31:23,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:31:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69534 states. [2021-06-06 00:31:24,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69534 to 43873. [2021-06-06 00:31:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43873 states, 43872 states have (on average 3.9042897520058353) internal successors, (171289), 43872 states have internal predecessors, (171289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43873 states to 43873 states and 171289 transitions. [2021-06-06 00:31:24,966 INFO L78 Accepts]: Start accepts. Automaton has 43873 states and 171289 transitions. Word has length 28 [2021-06-06 00:31:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:24,966 INFO L482 AbstractCegarLoop]: Abstraction has 43873 states and 171289 transitions. [2021-06-06 00:31:24,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 43873 states and 171289 transitions. [2021-06-06 00:31:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:25,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:25,037 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:25,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-06 00:31:25,241 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:25,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-06-06 00:31:25,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:25,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147036843] [2021-06-06 00:31:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:25,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:25,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147036843] [2021-06-06 00:31:25,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147036843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:25,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773538997] [2021-06-06 00:31:25,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:25,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:31:25,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:25,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:25,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:25,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773538997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:25,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:25,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:31:25,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477729822] [2021-06-06 00:31:25,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:31:25,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:25,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:31:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:31:25,369 INFO L87 Difference]: Start difference. First operand 43873 states and 171289 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:26,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:26,658 INFO L93 Difference]: Finished difference Result 69043 states and 258242 transitions. [2021-06-06 00:31:26,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:31:26,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:26,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:26,848 INFO L225 Difference]: With dead ends: 69043 [2021-06-06 00:31:26,848 INFO L226 Difference]: Without dead ends: 69043 [2021-06-06 00:31:26,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 550.8ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:31:26,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69043 states. [2021-06-06 00:31:28,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69043 to 47103. [2021-06-06 00:31:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47103 states, 47102 states have (on average 3.907965691478069) internal successors, (184073), 47102 states have internal predecessors, (184073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47103 states to 47103 states and 184073 transitions. [2021-06-06 00:31:28,447 INFO L78 Accepts]: Start accepts. Automaton has 47103 states and 184073 transitions. Word has length 28 [2021-06-06 00:31:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:28,447 INFO L482 AbstractCegarLoop]: Abstraction has 47103 states and 184073 transitions. [2021-06-06 00:31:28,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 47103 states and 184073 transitions. [2021-06-06 00:31:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:28,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:28,530 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:28,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-06 00:31:28,730 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:28,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-06-06 00:31:28,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:28,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260199052] [2021-06-06 00:31:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:28,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:28,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260199052] [2021-06-06 00:31:28,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260199052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:28,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907367476] [2021-06-06 00:31:28,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:28,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:31:28,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:28,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:28,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:28,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907367476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:28,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:28,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:31:28,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960328929] [2021-06-06 00:31:28,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:31:28,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:28,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:31:28,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:31:28,861 INFO L87 Difference]: Start difference. First operand 47103 states and 184073 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:29,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:29,937 INFO L93 Difference]: Finished difference Result 68545 states and 256931 transitions. [2021-06-06 00:31:29,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:31:29,937 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:29,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:30,140 INFO L225 Difference]: With dead ends: 68545 [2021-06-06 00:31:30,141 INFO L226 Difference]: Without dead ends: 68537 [2021-06-06 00:31:30,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:31:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68537 states. [2021-06-06 00:31:31,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68537 to 46797. [2021-06-06 00:31:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46797 states, 46796 states have (on average 3.913283186597145) internal successors, (183126), 46796 states have internal predecessors, (183126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46797 states to 46797 states and 183126 transitions. [2021-06-06 00:31:31,660 INFO L78 Accepts]: Start accepts. Automaton has 46797 states and 183126 transitions. Word has length 28 [2021-06-06 00:31:31,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:31,660 INFO L482 AbstractCegarLoop]: Abstraction has 46797 states and 183126 transitions. [2021-06-06 00:31:31,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 46797 states and 183126 transitions. [2021-06-06 00:31:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:31,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:31,731 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:31,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:31,931 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-06-06 00:31:31,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:31,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546205824] [2021-06-06 00:31:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:31,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:31,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546205824] [2021-06-06 00:31:31,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546205824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:31,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886233083] [2021-06-06 00:31:31,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:31,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:31:31,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:31,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:31,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:32,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886233083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:32,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:32,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:31:32,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314795367] [2021-06-06 00:31:32,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:31:32,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:32,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:31:32,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:31:32,064 INFO L87 Difference]: Start difference. First operand 46797 states and 183126 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:33,044 INFO L93 Difference]: Finished difference Result 66948 states and 252499 transitions. [2021-06-06 00:31:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:31:33,044 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:33,216 INFO L225 Difference]: With dead ends: 66948 [2021-06-06 00:31:33,216 INFO L226 Difference]: Without dead ends: 66924 [2021-06-06 00:31:33,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 317.3ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:31:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66924 states. [2021-06-06 00:31:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66924 to 46693. [2021-06-06 00:31:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46693 states, 46692 states have (on average 3.9132613723978413) internal successors, (182718), 46692 states have internal predecessors, (182718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46693 states to 46693 states and 182718 transitions. [2021-06-06 00:31:35,007 INFO L78 Accepts]: Start accepts. Automaton has 46693 states and 182718 transitions. Word has length 28 [2021-06-06 00:31:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:35,007 INFO L482 AbstractCegarLoop]: Abstraction has 46693 states and 182718 transitions. [2021-06-06 00:31:35,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:35,008 INFO L276 IsEmpty]: Start isEmpty. Operand 46693 states and 182718 transitions. [2021-06-06 00:31:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:35,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:35,074 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:35,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:35,275 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:35,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:35,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-06-06 00:31:35,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:35,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417481733] [2021-06-06 00:31:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:31:35,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:35,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417481733] [2021-06-06 00:31:35,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417481733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:35,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834363884] [2021-06-06 00:31:35,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:35,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:31:35,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:35,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:35,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:35,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834363884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:35,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:35,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:31:35,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310744665] [2021-06-06 00:31:35,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:31:35,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:35,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:31:35,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:31:35,423 INFO L87 Difference]: Start difference. First operand 46693 states and 182718 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:36,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:36,744 INFO L93 Difference]: Finished difference Result 68144 states and 255825 transitions. [2021-06-06 00:31:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-06 00:31:36,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:36,925 INFO L225 Difference]: With dead ends: 68144 [2021-06-06 00:31:36,925 INFO L226 Difference]: Without dead ends: 68144 [2021-06-06 00:31:36,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 545.2ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:31:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68144 states. [2021-06-06 00:31:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68144 to 46789. [2021-06-06 00:31:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46789 states, 46788 states have (on average 3.9119432333076856) internal successors, (183032), 46788 states have internal predecessors, (183032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46789 states to 46789 states and 183032 transitions. [2021-06-06 00:31:38,231 INFO L78 Accepts]: Start accepts. Automaton has 46789 states and 183032 transitions. Word has length 28 [2021-06-06 00:31:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:38,231 INFO L482 AbstractCegarLoop]: Abstraction has 46789 states and 183032 transitions. [2021-06-06 00:31:38,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:38,231 INFO L276 IsEmpty]: Start isEmpty. Operand 46789 states and 183032 transitions. [2021-06-06 00:31:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:38,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:38,304 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:38,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:38,513 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:38,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-06-06 00:31:38,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:38,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292128745] [2021-06-06 00:31:38,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:31:38,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:38,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292128745] [2021-06-06 00:31:38,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292128745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:38,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121790142] [2021-06-06 00:31:38,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:38,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:31:38,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:38,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:38,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:38,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121790142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:38,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:38,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:31:38,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952259312] [2021-06-06 00:31:38,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:31:38,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:38,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:31:38,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:31:38,650 INFO L87 Difference]: Start difference. First operand 46789 states and 183032 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:39,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:39,990 INFO L93 Difference]: Finished difference Result 67704 states and 254569 transitions. [2021-06-06 00:31:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:31:39,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:39,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:40,188 INFO L225 Difference]: With dead ends: 67704 [2021-06-06 00:31:40,188 INFO L226 Difference]: Without dead ends: 67696 [2021-06-06 00:31:40,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 725.4ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:31:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67696 states. [2021-06-06 00:31:41,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67696 to 46721. [2021-06-06 00:31:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46721 states, 46720 states have (on average 3.913099315068493) internal successors, (182820), 46720 states have internal predecessors, (182820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46721 states to 46721 states and 182820 transitions. [2021-06-06 00:31:41,900 INFO L78 Accepts]: Start accepts. Automaton has 46721 states and 182820 transitions. Word has length 28 [2021-06-06 00:31:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:41,900 INFO L482 AbstractCegarLoop]: Abstraction has 46721 states and 182820 transitions. [2021-06-06 00:31:41,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 46721 states and 182820 transitions. [2021-06-06 00:31:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:41,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:41,975 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:42,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:42,175 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:42,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:42,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-06-06 00:31:42,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:42,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446779198] [2021-06-06 00:31:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:31:42,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:42,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446779198] [2021-06-06 00:31:42,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446779198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:42,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107501790] [2021-06-06 00:31:42,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:42,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:42,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:42,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107501790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:42,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:42,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:31:42,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689346901] [2021-06-06 00:31:42,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:31:42,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:42,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:31:42,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:31:42,355 INFO L87 Difference]: Start difference. First operand 46721 states and 182820 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:43,150 INFO L93 Difference]: Finished difference Result 66435 states and 251058 transitions. [2021-06-06 00:31:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:31:43,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:43,333 INFO L225 Difference]: With dead ends: 66435 [2021-06-06 00:31:43,333 INFO L226 Difference]: Without dead ends: 66411 [2021-06-06 00:31:43,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 347.8ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:31:43,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66411 states. [2021-06-06 00:31:44,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66411 to 46697. [2021-06-06 00:31:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46697 states, 46696 states have (on average 3.9132259722460168) internal successors, (182732), 46696 states have internal predecessors, (182732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46697 states to 46697 states and 182732 transitions. [2021-06-06 00:31:44,948 INFO L78 Accepts]: Start accepts. Automaton has 46697 states and 182732 transitions. Word has length 28 [2021-06-06 00:31:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:44,948 INFO L482 AbstractCegarLoop]: Abstraction has 46697 states and 182732 transitions. [2021-06-06 00:31:44,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 46697 states and 182732 transitions. [2021-06-06 00:31:45,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:45,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:45,031 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:45,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:45,231 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:45,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:45,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-06-06 00:31:45,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:45,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316377906] [2021-06-06 00:31:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:45,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:45,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316377906] [2021-06-06 00:31:45,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316377906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:45,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867326761] [2021-06-06 00:31:45,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:45,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:31:45,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:45,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:45,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:45,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867326761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:45,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:45,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:31:45,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113608876] [2021-06-06 00:31:45,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:31:45,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:45,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:31:45,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:31:45,368 INFO L87 Difference]: Start difference. First operand 46697 states and 182732 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:46,988 INFO L93 Difference]: Finished difference Result 69974 states and 261149 transitions. [2021-06-06 00:31:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-06 00:31:46,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:47,180 INFO L225 Difference]: With dead ends: 69974 [2021-06-06 00:31:47,180 INFO L226 Difference]: Without dead ends: 69974 [2021-06-06 00:31:47,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 807.8ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-06 00:31:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69974 states. [2021-06-06 00:31:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69974 to 51465. [2021-06-06 00:31:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51465 states, 51464 states have (on average 3.864293486709156) internal successors, (198872), 51464 states have internal predecessors, (198872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51465 states to 51465 states and 198872 transitions. [2021-06-06 00:31:49,062 INFO L78 Accepts]: Start accepts. Automaton has 51465 states and 198872 transitions. Word has length 28 [2021-06-06 00:31:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:49,062 INFO L482 AbstractCegarLoop]: Abstraction has 51465 states and 198872 transitions. [2021-06-06 00:31:49,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 51465 states and 198872 transitions. [2021-06-06 00:31:49,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:49,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:49,147 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:49,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-06 00:31:49,347 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:49,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-06-06 00:31:49,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:49,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537874910] [2021-06-06 00:31:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:49,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:49,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537874910] [2021-06-06 00:31:49,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537874910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:49,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828258624] [2021-06-06 00:31:49,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:49,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:31:49,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:49,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:49,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:49,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828258624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:49,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:49,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:31:49,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390963905] [2021-06-06 00:31:49,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:31:49,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:49,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:31:49,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:31:49,464 INFO L87 Difference]: Start difference. First operand 51465 states and 198872 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:50,654 INFO L93 Difference]: Finished difference Result 69176 states and 258972 transitions. [2021-06-06 00:31:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:31:50,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:50,832 INFO L225 Difference]: With dead ends: 69176 [2021-06-06 00:31:50,832 INFO L226 Difference]: Without dead ends: 69168 [2021-06-06 00:31:50,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 595.5ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-06 00:31:50,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69168 states. [2021-06-06 00:31:52,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69168 to 50301. [2021-06-06 00:31:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50301 states, 50300 states have (on average 3.8816302186878726) internal successors, (195246), 50300 states have internal predecessors, (195246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50301 states to 50301 states and 195246 transitions. [2021-06-06 00:31:52,596 INFO L78 Accepts]: Start accepts. Automaton has 50301 states and 195246 transitions. Word has length 28 [2021-06-06 00:31:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:52,596 INFO L482 AbstractCegarLoop]: Abstraction has 50301 states and 195246 transitions. [2021-06-06 00:31:52,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 50301 states and 195246 transitions. [2021-06-06 00:31:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:52,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:52,668 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:52,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-06 00:31:52,869 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:52,869 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-06-06 00:31:52,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:52,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239149961] [2021-06-06 00:31:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:52,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:52,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239149961] [2021-06-06 00:31:52,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239149961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:52,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685225406] [2021-06-06 00:31:52,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:52,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:31:52,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:52,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:52,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:52,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685225406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:52,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:52,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:31:52,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247142436] [2021-06-06 00:31:52,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:31:52,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:52,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:31:52,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:31:52,993 INFO L87 Difference]: Start difference. First operand 50301 states and 195246 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:54,256 INFO L93 Difference]: Finished difference Result 67372 states and 253976 transitions. [2021-06-06 00:31:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:31:54,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:54,440 INFO L225 Difference]: With dead ends: 67372 [2021-06-06 00:31:54,440 INFO L226 Difference]: Without dead ends: 67348 [2021-06-06 00:31:54,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 510.5ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:31:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67348 states. [2021-06-06 00:31:55,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67348 to 50281. [2021-06-06 00:31:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50281 states, 50280 states have (on average 3.879912490055688) internal successors, (195082), 50280 states have internal predecessors, (195082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50281 states to 50281 states and 195082 transitions. [2021-06-06 00:31:55,985 INFO L78 Accepts]: Start accepts. Automaton has 50281 states and 195082 transitions. Word has length 28 [2021-06-06 00:31:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:55,985 INFO L482 AbstractCegarLoop]: Abstraction has 50281 states and 195082 transitions. [2021-06-06 00:31:55,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:55,985 INFO L276 IsEmpty]: Start isEmpty. Operand 50281 states and 195082 transitions. [2021-06-06 00:31:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:56,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:56,062 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:56,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-06 00:31:56,263 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:56,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-06-06 00:31:56,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:56,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502021070] [2021-06-06 00:31:56,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:56,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:56,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502021070] [2021-06-06 00:31:56,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502021070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:56,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528037857] [2021-06-06 00:31:56,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:56,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:31:56,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:56,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:56,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:56,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528037857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:56,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:56,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:31:56,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448580324] [2021-06-06 00:31:56,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:31:56,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:56,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:31:56,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:31:56,386 INFO L87 Difference]: Start difference. First operand 50281 states and 195082 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:57,682 INFO L93 Difference]: Finished difference Result 68744 states and 257789 transitions. [2021-06-06 00:31:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:31:57,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:31:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:57,864 INFO L225 Difference]: With dead ends: 68744 [2021-06-06 00:31:57,864 INFO L226 Difference]: Without dead ends: 68704 [2021-06-06 00:31:57,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 498.5ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:31:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68704 states. [2021-06-06 00:31:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68704 to 50435. [2021-06-06 00:31:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50435 states, 50434 states have (on average 3.879267954157909) internal successors, (195647), 50434 states have internal predecessors, (195647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50435 states to 50435 states and 195647 transitions. [2021-06-06 00:31:59,591 INFO L78 Accepts]: Start accepts. Automaton has 50435 states and 195647 transitions. Word has length 28 [2021-06-06 00:31:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:59,591 INFO L482 AbstractCegarLoop]: Abstraction has 50435 states and 195647 transitions. [2021-06-06 00:31:59,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 50435 states and 195647 transitions. [2021-06-06 00:31:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:31:59,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:59,665 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:59,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:59,866 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:59,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:59,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-06-06 00:31:59,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:59,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095999119] [2021-06-06 00:31:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:59,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:59,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095999119] [2021-06-06 00:31:59,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095999119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:59,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156418856] [2021-06-06 00:31:59,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:59,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:31:59,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:59,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:31:59,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:00,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156418856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:00,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:00,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:32:00,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658764447] [2021-06-06 00:32:00,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:32:00,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:00,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:32:00,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:32:00,019 INFO L87 Difference]: Start difference. First operand 50435 states and 195647 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:01,647 INFO L93 Difference]: Finished difference Result 67858 states and 255155 transitions. [2021-06-06 00:32:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-06 00:32:01,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:01,823 INFO L225 Difference]: With dead ends: 67858 [2021-06-06 00:32:01,824 INFO L226 Difference]: Without dead ends: 67858 [2021-06-06 00:32:01,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 762.5ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-06 00:32:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67858 states. [2021-06-06 00:32:03,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67858 to 51340. [2021-06-06 00:32:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51340 states, 51339 states have (on average 3.870702584779602) internal successors, (198718), 51339 states have internal predecessors, (198718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51340 states to 51340 states and 198718 transitions. [2021-06-06 00:32:03,347 INFO L78 Accepts]: Start accepts. Automaton has 51340 states and 198718 transitions. Word has length 28 [2021-06-06 00:32:03,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:03,347 INFO L482 AbstractCegarLoop]: Abstraction has 51340 states and 198718 transitions. [2021-06-06 00:32:03,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:03,347 INFO L276 IsEmpty]: Start isEmpty. Operand 51340 states and 198718 transitions. [2021-06-06 00:32:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:03,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:03,429 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:03,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-06 00:32:03,630 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:03,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-06-06 00:32:03,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:03,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782786376] [2021-06-06 00:32:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:03,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:03,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782786376] [2021-06-06 00:32:03,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782786376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:03,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531166472] [2021-06-06 00:32:03,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:03,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:03,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531166472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:03,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:03,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:32:03,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550880735] [2021-06-06 00:32:03,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:32:03,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:03,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:32:03,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:32:03,776 INFO L87 Difference]: Start difference. First operand 51340 states and 198718 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:04,702 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-06 00:32:05,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:05,174 INFO L93 Difference]: Finished difference Result 67233 states and 253392 transitions. [2021-06-06 00:32:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:32:05,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:05,350 INFO L225 Difference]: With dead ends: 67233 [2021-06-06 00:32:05,350 INFO L226 Difference]: Without dead ends: 67225 [2021-06-06 00:32:05,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 852.9ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:32:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67225 states. [2021-06-06 00:32:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67225 to 51264. [2021-06-06 00:32:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51264 states, 51263 states have (on average 3.8718373875894896) internal successors, (198482), 51263 states have internal predecessors, (198482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51264 states to 51264 states and 198482 transitions. [2021-06-06 00:32:06,896 INFO L78 Accepts]: Start accepts. Automaton has 51264 states and 198482 transitions. Word has length 28 [2021-06-06 00:32:06,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:06,896 INFO L482 AbstractCegarLoop]: Abstraction has 51264 states and 198482 transitions. [2021-06-06 00:32:06,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 51264 states and 198482 transitions. [2021-06-06 00:32:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:06,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:06,976 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:07,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-06 00:32:07,177 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:07,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-06-06 00:32:07,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:07,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102428259] [2021-06-06 00:32:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:07,427 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-06 00:32:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:07,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:07,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102428259] [2021-06-06 00:32:07,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102428259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:07,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001490459] [2021-06-06 00:32:07,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:07,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:32:07,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:07,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:07,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:07,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001490459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:07,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:07,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:32:07,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021230978] [2021-06-06 00:32:07,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:32:07,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:07,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:32:07,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:32:07,577 INFO L87 Difference]: Start difference. First operand 51264 states and 198482 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:08,632 INFO L93 Difference]: Finished difference Result 66710 states and 252146 transitions. [2021-06-06 00:32:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:32:08,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:08,809 INFO L225 Difference]: With dead ends: 66710 [2021-06-06 00:32:08,809 INFO L226 Difference]: Without dead ends: 66686 [2021-06-06 00:32:08,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 760.0ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:32:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66686 states. [2021-06-06 00:32:10,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66686 to 51250. [2021-06-06 00:32:10,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51250 states, 51249 states have (on average 3.8718218892075944) internal successors, (198427), 51249 states have internal predecessors, (198427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51250 states to 51250 states and 198427 transitions. [2021-06-06 00:32:10,558 INFO L78 Accepts]: Start accepts. Automaton has 51250 states and 198427 transitions. Word has length 28 [2021-06-06 00:32:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:10,558 INFO L482 AbstractCegarLoop]: Abstraction has 51250 states and 198427 transitions. [2021-06-06 00:32:10,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 51250 states and 198427 transitions. [2021-06-06 00:32:10,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:10,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:10,636 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:10,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-06 00:32:10,836 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:10,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-06-06 00:32:10,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:10,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693787899] [2021-06-06 00:32:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:10,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:10,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693787899] [2021-06-06 00:32:10,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693787899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:10,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597220571] [2021-06-06 00:32:10,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:10,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:32:10,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:10,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:10,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:10,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597220571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:10,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:10,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:32:10,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623562296] [2021-06-06 00:32:10,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:32:10,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:10,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:32:10,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:32:10,962 INFO L87 Difference]: Start difference. First operand 51250 states and 198427 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:11,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:11,959 INFO L93 Difference]: Finished difference Result 66492 states and 251453 transitions. [2021-06-06 00:32:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:32:11,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:12,403 INFO L225 Difference]: With dead ends: 66492 [2021-06-06 00:32:12,404 INFO L226 Difference]: Without dead ends: 66452 [2021-06-06 00:32:12,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 473.7ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:32:12,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66452 states. [2021-06-06 00:32:13,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66452 to 51599. [2021-06-06 00:32:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51599 states, 51598 states have (on average 3.8733284235823096) internal successors, (199856), 51598 states have internal predecessors, (199856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51599 states to 51599 states and 199856 transitions. [2021-06-06 00:32:13,836 INFO L78 Accepts]: Start accepts. Automaton has 51599 states and 199856 transitions. Word has length 28 [2021-06-06 00:32:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:13,836 INFO L482 AbstractCegarLoop]: Abstraction has 51599 states and 199856 transitions. [2021-06-06 00:32:13,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 51599 states and 199856 transitions. [2021-06-06 00:32:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:13,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:13,910 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:14,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:14,110 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:14,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:14,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-06-06 00:32:14,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:14,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116540958] [2021-06-06 00:32:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:14,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:14,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116540958] [2021-06-06 00:32:14,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116540958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:14,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904266286] [2021-06-06 00:32:14,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:14,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:32:14,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:14,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:14,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:14,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904266286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:14,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:14,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:32:14,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853434327] [2021-06-06 00:32:14,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:32:14,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:14,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:32:14,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:32:14,252 INFO L87 Difference]: Start difference. First operand 51599 states and 199856 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:15,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:15,653 INFO L93 Difference]: Finished difference Result 80755 states and 301894 transitions. [2021-06-06 00:32:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:32:15,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:15,873 INFO L225 Difference]: With dead ends: 80755 [2021-06-06 00:32:15,873 INFO L226 Difference]: Without dead ends: 80755 [2021-06-06 00:32:15,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 535.9ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:32:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80755 states. [2021-06-06 00:32:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80755 to 52765. [2021-06-06 00:32:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52765 states, 52764 states have (on average 3.885433249943143) internal successors, (205011), 52764 states have internal predecessors, (205011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52765 states to 52765 states and 205011 transitions. [2021-06-06 00:32:17,587 INFO L78 Accepts]: Start accepts. Automaton has 52765 states and 205011 transitions. Word has length 28 [2021-06-06 00:32:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:17,587 INFO L482 AbstractCegarLoop]: Abstraction has 52765 states and 205011 transitions. [2021-06-06 00:32:17,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 52765 states and 205011 transitions. [2021-06-06 00:32:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:17,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:17,672 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:17,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:17,873 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:17,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:17,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-06-06 00:32:17,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:17,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439417243] [2021-06-06 00:32:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:17,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:17,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439417243] [2021-06-06 00:32:17,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439417243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:17,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596746212] [2021-06-06 00:32:17,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:17,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:32:17,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:17,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:17,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:18,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596746212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:18,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:18,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:32:18,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496520553] [2021-06-06 00:32:18,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:32:18,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:18,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:32:18,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:32:18,035 INFO L87 Difference]: Start difference. First operand 52765 states and 205011 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:19,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:19,403 INFO L93 Difference]: Finished difference Result 73770 states and 279838 transitions. [2021-06-06 00:32:19,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:32:19,403 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:19,610 INFO L225 Difference]: With dead ends: 73770 [2021-06-06 00:32:19,611 INFO L226 Difference]: Without dead ends: 73770 [2021-06-06 00:32:19,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 496.6ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:32:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73770 states. [2021-06-06 00:32:21,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73770 to 52795. [2021-06-06 00:32:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52795 states, 52794 states have (on average 3.8852521119824224) internal successors, (205118), 52794 states have internal predecessors, (205118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52795 states to 52795 states and 205118 transitions. [2021-06-06 00:32:21,442 INFO L78 Accepts]: Start accepts. Automaton has 52795 states and 205118 transitions. Word has length 28 [2021-06-06 00:32:21,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:21,443 INFO L482 AbstractCegarLoop]: Abstraction has 52795 states and 205118 transitions. [2021-06-06 00:32:21,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 52795 states and 205118 transitions. [2021-06-06 00:32:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:21,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:21,525 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:21,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:21,725 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-06-06 00:32:21,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:21,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247248989] [2021-06-06 00:32:21,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:21,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:21,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247248989] [2021-06-06 00:32:21,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247248989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:21,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860992155] [2021-06-06 00:32:21,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:21,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:32:21,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:21,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:21,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:21,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860992155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:21,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:21,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:32:21,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248033326] [2021-06-06 00:32:21,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:32:21,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:21,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:32:21,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:32:21,878 INFO L87 Difference]: Start difference. First operand 52795 states and 205118 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:23,572 INFO L93 Difference]: Finished difference Result 74806 states and 282789 transitions. [2021-06-06 00:32:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:32:23,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:23,757 INFO L225 Difference]: With dead ends: 74806 [2021-06-06 00:32:23,757 INFO L226 Difference]: Without dead ends: 74806 [2021-06-06 00:32:23,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 836.1ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:32:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74806 states. [2021-06-06 00:32:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74806 to 53059. [2021-06-06 00:32:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53059 states, 53058 states have (on average 3.882091296317238) internal successors, (205976), 53058 states have internal predecessors, (205976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53059 states to 53059 states and 205976 transitions. [2021-06-06 00:32:25,312 INFO L78 Accepts]: Start accepts. Automaton has 53059 states and 205976 transitions. Word has length 28 [2021-06-06 00:32:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:25,312 INFO L482 AbstractCegarLoop]: Abstraction has 53059 states and 205976 transitions. [2021-06-06 00:32:25,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 53059 states and 205976 transitions. [2021-06-06 00:32:25,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:25,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:25,389 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:25,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-06 00:32:25,593 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:25,593 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-06-06 00:32:25,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:25,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356270386] [2021-06-06 00:32:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:25,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:25,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356270386] [2021-06-06 00:32:25,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356270386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:25,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993443941] [2021-06-06 00:32:25,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:25,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:25,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:25,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993443941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:25,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:25,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:32:25,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529473278] [2021-06-06 00:32:25,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:32:25,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:25,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:32:25,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:32:25,735 INFO L87 Difference]: Start difference. First operand 53059 states and 205976 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:27,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:27,199 INFO L93 Difference]: Finished difference Result 73815 states and 279970 transitions. [2021-06-06 00:32:27,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:32:27,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:27,399 INFO L225 Difference]: With dead ends: 73815 [2021-06-06 00:32:27,400 INFO L226 Difference]: Without dead ends: 73811 [2021-06-06 00:32:27,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 644.6ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-06 00:32:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73811 states. [2021-06-06 00:32:28,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73811 to 52695. [2021-06-06 00:32:28,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52695 states, 52694 states have (on average 3.8854518541010363) internal successors, (204740), 52694 states have internal predecessors, (204740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52695 states to 52695 states and 204740 transitions. [2021-06-06 00:32:29,220 INFO L78 Accepts]: Start accepts. Automaton has 52695 states and 204740 transitions. Word has length 28 [2021-06-06 00:32:29,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:29,220 INFO L482 AbstractCegarLoop]: Abstraction has 52695 states and 204740 transitions. [2021-06-06 00:32:29,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:29,220 INFO L276 IsEmpty]: Start isEmpty. Operand 52695 states and 204740 transitions. [2021-06-06 00:32:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:29,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:29,298 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:29,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-06 00:32:29,499 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:29,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-06-06 00:32:29,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:29,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954320084] [2021-06-06 00:32:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:29,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:29,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954320084] [2021-06-06 00:32:29,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954320084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:29,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783516697] [2021-06-06 00:32:29,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:29,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:32:29,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:29,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783516697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:29,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:29,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:32:29,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935939783] [2021-06-06 00:32:29,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:32:29,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:32:29,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:32:29,639 INFO L87 Difference]: Start difference. First operand 52695 states and 204740 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:30,495 INFO L93 Difference]: Finished difference Result 67805 states and 258963 transitions. [2021-06-06 00:32:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:32:30,495 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:30,674 INFO L225 Difference]: With dead ends: 67805 [2021-06-06 00:32:30,674 INFO L226 Difference]: Without dead ends: 67805 [2021-06-06 00:32:30,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 420.1ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:32:30,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67805 states. [2021-06-06 00:32:32,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67805 to 52711. [2021-06-06 00:32:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52711 states, 52710 states have (on average 3.887080250426864) internal successors, (204888), 52710 states have internal predecessors, (204888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52711 states to 52711 states and 204888 transitions. [2021-06-06 00:32:32,421 INFO L78 Accepts]: Start accepts. Automaton has 52711 states and 204888 transitions. Word has length 28 [2021-06-06 00:32:32,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:32,421 INFO L482 AbstractCegarLoop]: Abstraction has 52711 states and 204888 transitions. [2021-06-06 00:32:32,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:32,421 INFO L276 IsEmpty]: Start isEmpty. Operand 52711 states and 204888 transitions. [2021-06-06 00:32:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:32,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:32,502 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:32,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-06 00:32:32,703 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:32,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:32,703 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-06-06 00:32:32,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:32,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532313735] [2021-06-06 00:32:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:32,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:32,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532313735] [2021-06-06 00:32:32,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532313735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:32,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978802916] [2021-06-06 00:32:32,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:32,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:32:32,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:32,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:32,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978802916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:32,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:32,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:32:32,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289312790] [2021-06-06 00:32:32,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:32:32,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:32,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:32:32,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:32:32,835 INFO L87 Difference]: Start difference. First operand 52711 states and 204888 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:33,588 INFO L93 Difference]: Finished difference Result 66995 states and 256734 transitions. [2021-06-06 00:32:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:32:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:33,772 INFO L225 Difference]: With dead ends: 66995 [2021-06-06 00:32:33,772 INFO L226 Difference]: Without dead ends: 66983 [2021-06-06 00:32:33,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:32:33,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66983 states. [2021-06-06 00:32:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66983 to 52645. [2021-06-06 00:32:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52645 states, 52644 states have (on average 3.8880974090114733) internal successors, (204685), 52644 states have internal predecessors, (204685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52645 states to 52645 states and 204685 transitions. [2021-06-06 00:32:35,635 INFO L78 Accepts]: Start accepts. Automaton has 52645 states and 204685 transitions. Word has length 28 [2021-06-06 00:32:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:35,635 INFO L482 AbstractCegarLoop]: Abstraction has 52645 states and 204685 transitions. [2021-06-06 00:32:35,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 52645 states and 204685 transitions. [2021-06-06 00:32:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:35,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:35,738 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:35,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-06 00:32:35,953 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-06-06 00:32:35,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:35,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650232706] [2021-06-06 00:32:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:35,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:35,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650232706] [2021-06-06 00:32:35,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650232706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:35,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094897871] [2021-06-06 00:32:35,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:36,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:32:36,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:36,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:36,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:36,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094897871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:36,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:36,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:32:36,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273851051] [2021-06-06 00:32:36,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:32:36,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:36,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:32:36,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:32:36,098 INFO L87 Difference]: Start difference. First operand 52645 states and 204685 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:36,760 INFO L93 Difference]: Finished difference Result 57259 states and 219875 transitions. [2021-06-06 00:32:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:32:36,761 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:36,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:36,928 INFO L225 Difference]: With dead ends: 57259 [2021-06-06 00:32:36,928 INFO L226 Difference]: Without dead ends: 57259 [2021-06-06 00:32:36,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 290.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57259 states. [2021-06-06 00:32:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57259 to 52853. [2021-06-06 00:32:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52853 states, 52852 states have (on average 3.8858888972981154) internal successors, (205377), 52852 states have internal predecessors, (205377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52853 states to 52853 states and 205377 transitions. [2021-06-06 00:32:38,602 INFO L78 Accepts]: Start accepts. Automaton has 52853 states and 205377 transitions. Word has length 28 [2021-06-06 00:32:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:38,602 INFO L482 AbstractCegarLoop]: Abstraction has 52853 states and 205377 transitions. [2021-06-06 00:32:38,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 52853 states and 205377 transitions. [2021-06-06 00:32:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:38,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:38,689 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:38,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-06 00:32:38,889 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-06-06 00:32:38,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:38,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668446292] [2021-06-06 00:32:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:38,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:38,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668446292] [2021-06-06 00:32:38,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668446292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:38,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643768039] [2021-06-06 00:32:38,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:38,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:32:38,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:38,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:39,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643768039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:39,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:39,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:32:39,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363499022] [2021-06-06 00:32:39,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:32:39,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:39,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:32:39,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:32:39,021 INFO L87 Difference]: Start difference. First operand 52853 states and 205377 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:39,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:39,566 INFO L93 Difference]: Finished difference Result 57070 states and 219367 transitions. [2021-06-06 00:32:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:32:39,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:39,727 INFO L225 Difference]: With dead ends: 57070 [2021-06-06 00:32:39,727 INFO L226 Difference]: Without dead ends: 57066 [2021-06-06 00:32:39,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:32:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57066 states. [2021-06-06 00:32:40,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57066 to 52793. [2021-06-06 00:32:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52793 states, 52792 states have (on average 3.886668434611305) internal successors, (205185), 52792 states have internal predecessors, (205185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:41,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52793 states to 52793 states and 205185 transitions. [2021-06-06 00:32:41,520 INFO L78 Accepts]: Start accepts. Automaton has 52793 states and 205185 transitions. Word has length 28 [2021-06-06 00:32:41,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:41,520 INFO L482 AbstractCegarLoop]: Abstraction has 52793 states and 205185 transitions. [2021-06-06 00:32:41,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 52793 states and 205185 transitions. [2021-06-06 00:32:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:41,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:41,611 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:41,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:41,812 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:41,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:41,813 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 87 times [2021-06-06 00:32:41,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:41,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508508129] [2021-06-06 00:32:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:41,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:41,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508508129] [2021-06-06 00:32:41,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508508129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:41,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261303056] [2021-06-06 00:32:41,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:41,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:32:41,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:41,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:41,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261303056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:41,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:41,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-06 00:32:41,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724081797] [2021-06-06 00:32:41,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:32:41,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:41,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:32:41,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:32:41,919 INFO L87 Difference]: Start difference. First operand 52793 states and 205185 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:42,482 INFO L93 Difference]: Finished difference Result 57147 states and 219589 transitions. [2021-06-06 00:32:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:32:42,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:42,637 INFO L225 Difference]: With dead ends: 57147 [2021-06-06 00:32:42,637 INFO L226 Difference]: Without dead ends: 57147 [2021-06-06 00:32:42,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:32:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57147 states. [2021-06-06 00:32:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57147 to 52913. [2021-06-06 00:32:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52913 states, 52912 states have (on average 3.8848087390384034) internal successors, (205553), 52912 states have internal predecessors, (205553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52913 states to 52913 states and 205553 transitions. [2021-06-06 00:32:43,988 INFO L78 Accepts]: Start accepts. Automaton has 52913 states and 205553 transitions. Word has length 28 [2021-06-06 00:32:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:43,988 INFO L482 AbstractCegarLoop]: Abstraction has 52913 states and 205553 transitions. [2021-06-06 00:32:43,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 52913 states and 205553 transitions. [2021-06-06 00:32:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:44,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:44,066 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:44,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-06 00:32:44,267 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 88 times [2021-06-06 00:32:44,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:44,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975252872] [2021-06-06 00:32:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:32:44,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:44,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975252872] [2021-06-06 00:32:44,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975252872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:44,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574855782] [2021-06-06 00:32:44,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:44,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:32:44,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:44,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:44,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:32:44,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574855782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:44,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:44,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-06 00:32:44,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843819300] [2021-06-06 00:32:44,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:32:44,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:44,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:32:44,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:32:44,375 INFO L87 Difference]: Start difference. First operand 52913 states and 205553 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:44,737 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-06 00:32:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:45,038 INFO L93 Difference]: Finished difference Result 57331 states and 220238 transitions. [2021-06-06 00:32:45,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:32:45,045 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:45,212 INFO L225 Difference]: With dead ends: 57331 [2021-06-06 00:32:45,212 INFO L226 Difference]: Without dead ends: 57319 [2021-06-06 00:32:45,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 323.0ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:32:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57319 states. [2021-06-06 00:32:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57319 to 53047. [2021-06-06 00:32:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53047 states, 53046 states have (on average 3.883195716924933) internal successors, (205988), 53046 states have internal predecessors, (205988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53047 states to 53047 states and 205988 transitions. [2021-06-06 00:32:46,603 INFO L78 Accepts]: Start accepts. Automaton has 53047 states and 205988 transitions. Word has length 28 [2021-06-06 00:32:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:46,603 INFO L482 AbstractCegarLoop]: Abstraction has 53047 states and 205988 transitions. [2021-06-06 00:32:46,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 53047 states and 205988 transitions. [2021-06-06 00:32:46,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:46,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:46,686 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:46,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:46,886 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:46,887 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 89 times [2021-06-06 00:32:46,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:46,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783900989] [2021-06-06 00:32:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:46,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:46,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783900989] [2021-06-06 00:32:46,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783900989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:46,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606103512] [2021-06-06 00:32:46,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:46,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:32:46,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:46,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:32:46,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:46,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606103512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:46,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:46,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-06 00:32:46,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191899488] [2021-06-06 00:32:46,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:32:46,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:32:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:32:46,993 INFO L87 Difference]: Start difference. First operand 53047 states and 205988 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:47,741 INFO L93 Difference]: Finished difference Result 57295 states and 220154 transitions. [2021-06-06 00:32:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:32:47,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:47,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:47,897 INFO L225 Difference]: With dead ends: 57295 [2021-06-06 00:32:47,897 INFO L226 Difference]: Without dead ends: 57275 [2021-06-06 00:32:47,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:32:47,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57275 states. [2021-06-06 00:32:49,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57275 to 53047. [2021-06-06 00:32:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53047 states, 53046 states have (on average 3.883120310673755) internal successors, (205984), 53046 states have internal predecessors, (205984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53047 states to 53047 states and 205984 transitions. [2021-06-06 00:32:49,275 INFO L78 Accepts]: Start accepts. Automaton has 53047 states and 205984 transitions. Word has length 28 [2021-06-06 00:32:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:49,275 INFO L482 AbstractCegarLoop]: Abstraction has 53047 states and 205984 transitions. [2021-06-06 00:32:49,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 53047 states and 205984 transitions. [2021-06-06 00:32:49,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:49,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:49,360 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:49,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-06 00:32:49,569 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-06-06 00:32:49,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:49,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478369623] [2021-06-06 00:32:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:49,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:49,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478369623] [2021-06-06 00:32:49,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478369623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:49,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045037894] [2021-06-06 00:32:49,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:49,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:32:49,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:49,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:32:49,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:49,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045037894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:49,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:49,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:32:49,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323387317] [2021-06-06 00:32:49,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:32:49,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:49,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:32:49,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:32:49,684 INFO L87 Difference]: Start difference. First operand 53047 states and 205984 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:50,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:50,159 INFO L93 Difference]: Finished difference Result 58008 states and 223549 transitions. [2021-06-06 00:32:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:32:50,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:50,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:50,313 INFO L225 Difference]: With dead ends: 58008 [2021-06-06 00:32:50,313 INFO L226 Difference]: Without dead ends: 57995 [2021-06-06 00:32:50,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:32:50,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57995 states. [2021-06-06 00:32:51,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57995 to 55780. [2021-06-06 00:32:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55780 states, 55779 states have (on average 3.8898510192007745) internal successors, (216972), 55779 states have internal predecessors, (216972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55780 states to 55780 states and 216972 transitions. [2021-06-06 00:32:52,032 INFO L78 Accepts]: Start accepts. Automaton has 55780 states and 216972 transitions. Word has length 28 [2021-06-06 00:32:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:52,033 INFO L482 AbstractCegarLoop]: Abstraction has 55780 states and 216972 transitions. [2021-06-06 00:32:52,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 55780 states and 216972 transitions. [2021-06-06 00:32:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:52,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:52,130 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:52,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:52,331 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:52,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:52,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-06-06 00:32:52,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:52,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782090839] [2021-06-06 00:32:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:52,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:52,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782090839] [2021-06-06 00:32:52,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782090839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:52,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752416091] [2021-06-06 00:32:52,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:52,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:32:52,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:52,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752416091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:52,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:52,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:32:52,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397255013] [2021-06-06 00:32:52,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:32:52,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:52,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:32:52,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:32:52,443 INFO L87 Difference]: Start difference. First operand 55780 states and 216972 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:52,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:52,968 INFO L93 Difference]: Finished difference Result 61738 states and 236391 transitions. [2021-06-06 00:32:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:32:52,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:53,139 INFO L225 Difference]: With dead ends: 61738 [2021-06-06 00:32:53,139 INFO L226 Difference]: Without dead ends: 61738 [2021-06-06 00:32:53,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:32:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61738 states. [2021-06-06 00:32:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61738 to 49367. [2021-06-06 00:32:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49367 states, 49366 states have (on average 3.878924766033302) internal successors, (191487), 49366 states have internal predecessors, (191487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49367 states to 49367 states and 191487 transitions. [2021-06-06 00:32:54,473 INFO L78 Accepts]: Start accepts. Automaton has 49367 states and 191487 transitions. Word has length 28 [2021-06-06 00:32:54,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:54,473 INFO L482 AbstractCegarLoop]: Abstraction has 49367 states and 191487 transitions. [2021-06-06 00:32:54,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:54,473 INFO L276 IsEmpty]: Start isEmpty. Operand 49367 states and 191487 transitions. [2021-06-06 00:32:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:54,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:54,545 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:54,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:54,746 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:54,746 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-06-06 00:32:54,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:54,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587151688] [2021-06-06 00:32:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:54,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:54,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587151688] [2021-06-06 00:32:54,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587151688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:54,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848619101] [2021-06-06 00:32:54,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:54,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:32:54,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:54,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:32:54,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:55,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848619101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:55,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:55,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:32:55,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457372529] [2021-06-06 00:32:55,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:32:55,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:55,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:32:55,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:32:55,084 INFO L87 Difference]: Start difference. First operand 49367 states and 191487 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:55,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:55,623 INFO L93 Difference]: Finished difference Result 54325 states and 208211 transitions. [2021-06-06 00:32:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:32:55,623 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:55,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:55,766 INFO L225 Difference]: With dead ends: 54325 [2021-06-06 00:32:55,766 INFO L226 Difference]: Without dead ends: 54325 [2021-06-06 00:32:55,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 412.9ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:32:55,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54325 states. [2021-06-06 00:32:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54325 to 50200. [2021-06-06 00:32:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50200 states, 50199 states have (on average 3.8774676786390168) internal successors, (194645), 50199 states have internal predecessors, (194645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50200 states to 50200 states and 194645 transitions. [2021-06-06 00:32:56,991 INFO L78 Accepts]: Start accepts. Automaton has 50200 states and 194645 transitions. Word has length 28 [2021-06-06 00:32:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:56,991 INFO L482 AbstractCegarLoop]: Abstraction has 50200 states and 194645 transitions. [2021-06-06 00:32:56,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 50200 states and 194645 transitions. [2021-06-06 00:32:57,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:57,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:57,065 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:57,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:57,281 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:57,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:57,281 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-06-06 00:32:57,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:57,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584982960] [2021-06-06 00:32:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:57,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:57,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584982960] [2021-06-06 00:32:57,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584982960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:57,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858165881] [2021-06-06 00:32:57,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:57,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:32:57,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:57,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:32:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:57,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858165881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:57,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:57,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:32:57,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988583377] [2021-06-06 00:32:57,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:32:57,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:57,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:32:57,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:32:57,406 INFO L87 Difference]: Start difference. First operand 50200 states and 194645 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:57,863 INFO L93 Difference]: Finished difference Result 52033 states and 200786 transitions. [2021-06-06 00:32:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:32:57,863 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:32:57,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:58,243 INFO L225 Difference]: With dead ends: 52033 [2021-06-06 00:32:58,243 INFO L226 Difference]: Without dead ends: 52033 [2021-06-06 00:32:58,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:32:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52033 states. [2021-06-06 00:32:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52033 to 50208. [2021-06-06 00:32:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50208 states, 50207 states have (on average 3.8773278626486345) internal successors, (194669), 50207 states have internal predecessors, (194669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:59,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50208 states to 50208 states and 194669 transitions. [2021-06-06 00:32:59,574 INFO L78 Accepts]: Start accepts. Automaton has 50208 states and 194669 transitions. Word has length 28 [2021-06-06 00:32:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:59,574 INFO L482 AbstractCegarLoop]: Abstraction has 50208 states and 194669 transitions. [2021-06-06 00:32:59,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 50208 states and 194669 transitions. [2021-06-06 00:32:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:32:59,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:59,649 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:59,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-06 00:32:59,849 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-06-06 00:32:59,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:59,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578395610] [2021-06-06 00:32:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:59,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:59,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578395610] [2021-06-06 00:32:59,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578395610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:59,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369360315] [2021-06-06 00:32:59,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:59,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:32:59,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:59,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:32:59,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:59,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369360315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:59,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:59,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:32:59,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849544675] [2021-06-06 00:32:59,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:32:59,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:59,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:32:59,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:32:59,967 INFO L87 Difference]: Start difference. First operand 50208 states and 194669 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:00,416 INFO L93 Difference]: Finished difference Result 51753 states and 199864 transitions. [2021-06-06 00:33:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:33:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:33:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:00,558 INFO L225 Difference]: With dead ends: 51753 [2021-06-06 00:33:00,558 INFO L226 Difference]: Without dead ends: 51753 [2021-06-06 00:33:00,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:33:00,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51753 states. [2021-06-06 00:33:01,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51753 to 50102. [2021-06-06 00:33:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50102 states, 50101 states have (on average 3.877068321989581) internal successors, (194245), 50101 states have internal predecessors, (194245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50102 states to 50102 states and 194245 transitions. [2021-06-06 00:33:01,777 INFO L78 Accepts]: Start accepts. Automaton has 50102 states and 194245 transitions. Word has length 28 [2021-06-06 00:33:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:01,777 INFO L482 AbstractCegarLoop]: Abstraction has 50102 states and 194245 transitions. [2021-06-06 00:33:01,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 50102 states and 194245 transitions. [2021-06-06 00:33:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:33:01,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:01,851 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:02,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:02,052 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:02,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:02,052 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-06-06 00:33:02,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:02,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030342747] [2021-06-06 00:33:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:02,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:02,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030342747] [2021-06-06 00:33:02,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030342747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:02,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727088330] [2021-06-06 00:33:02,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:02,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:33:02,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:02,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-06 00:33:02,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:02,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:33:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:02,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:02,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-06 00:33:02,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:02,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:02,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:02,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:5 [2021-06-06 00:33:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:02,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727088330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:02,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:02,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:33:02,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562940563] [2021-06-06 00:33:02,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:33:02,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:02,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:33:02,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:33:02,824 INFO L87 Difference]: Start difference. First operand 50102 states and 194245 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:05,927 INFO L93 Difference]: Finished difference Result 58226 states and 218118 transitions. [2021-06-06 00:33:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:33:05,927 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:33:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:06,071 INFO L225 Difference]: With dead ends: 58226 [2021-06-06 00:33:06,071 INFO L226 Difference]: Without dead ends: 58196 [2021-06-06 00:33:06,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2588.9ms TimeCoverageRelationStatistics Valid=432, Invalid=2430, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:33:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58196 states. [2021-06-06 00:33:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58196 to 50237. [2021-06-06 00:33:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50237 states, 50236 states have (on average 3.876303845847599) internal successors, (194730), 50236 states have internal predecessors, (194730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50237 states to 50237 states and 194730 transitions. [2021-06-06 00:33:07,314 INFO L78 Accepts]: Start accepts. Automaton has 50237 states and 194730 transitions. Word has length 30 [2021-06-06 00:33:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:07,314 INFO L482 AbstractCegarLoop]: Abstraction has 50237 states and 194730 transitions. [2021-06-06 00:33:07,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 50237 states and 194730 transitions. [2021-06-06 00:33:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:33:07,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:07,395 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:07,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-06 00:33:07,609 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:07,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:07,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-06-06 00:33:07,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:07,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217297545] [2021-06-06 00:33:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:07,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:07,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217297545] [2021-06-06 00:33:07,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217297545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:07,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515564856] [2021-06-06 00:33:07,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:33:07,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:33:07,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:07,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:33:07,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:08,215 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-06 00:33:08,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-06 00:33:08,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:08,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:08,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:08,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-06 00:33:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:08,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515564856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:08,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:08,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:33:08,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276537264] [2021-06-06 00:33:08,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:33:08,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:08,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:33:08,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:33:08,240 INFO L87 Difference]: Start difference. First operand 50237 states and 194730 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:08,573 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-06-06 00:33:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:10,668 INFO L93 Difference]: Finished difference Result 58234 states and 218176 transitions. [2021-06-06 00:33:10,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:33:10,668 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:33:10,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:10,812 INFO L225 Difference]: With dead ends: 58234 [2021-06-06 00:33:10,812 INFO L226 Difference]: Without dead ends: 58204 [2021-06-06 00:33:10,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1787.4ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:33:10,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58204 states. [2021-06-06 00:33:11,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58204 to 50243. [2021-06-06 00:33:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50243 states, 50242 states have (on average 3.8763385215556707) internal successors, (194755), 50242 states have internal predecessors, (194755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:12,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50243 states to 50243 states and 194755 transitions. [2021-06-06 00:33:12,034 INFO L78 Accepts]: Start accepts. Automaton has 50243 states and 194755 transitions. Word has length 30 [2021-06-06 00:33:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:12,034 INFO L482 AbstractCegarLoop]: Abstraction has 50243 states and 194755 transitions. [2021-06-06 00:33:12,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 50243 states and 194755 transitions. [2021-06-06 00:33:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:33:12,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:12,107 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:12,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-06 00:33:12,307 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:12,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 175 times [2021-06-06 00:33:12,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:12,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94445768] [2021-06-06 00:33:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:12,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:12,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94445768] [2021-06-06 00:33:12,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94445768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:12,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833986678] [2021-06-06 00:33:12,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:12,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:33:12,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:12,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:12,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:12,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:12,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:33:12,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:12,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:33:12,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-06 00:33:12,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:12,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:12,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:12,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-06 00:33:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:12,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833986678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:12,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:12,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-06 00:33:12,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633534295] [2021-06-06 00:33:12,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:33:12,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:12,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:33:12,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:33:12,796 INFO L87 Difference]: Start difference. First operand 50243 states and 194755 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:14,232 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-06 00:33:16,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:16,437 INFO L93 Difference]: Finished difference Result 71226 states and 266663 transitions. [2021-06-06 00:33:16,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:33:16,438 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:33:16,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:16,621 INFO L225 Difference]: With dead ends: 71226 [2021-06-06 00:33:16,621 INFO L226 Difference]: Without dead ends: 71211 [2021-06-06 00:33:16,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2954.1ms TimeCoverageRelationStatistics Valid=489, Invalid=3171, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:33:16,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71211 states. [2021-06-06 00:33:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71211 to 50282. [2021-06-06 00:33:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50282 states, 50281 states have (on average 3.8760764503490384) internal successors, (194893), 50281 states have internal predecessors, (194893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50282 states to 50282 states and 194893 transitions. [2021-06-06 00:33:17,929 INFO L78 Accepts]: Start accepts. Automaton has 50282 states and 194893 transitions. Word has length 30 [2021-06-06 00:33:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:17,929 INFO L482 AbstractCegarLoop]: Abstraction has 50282 states and 194893 transitions. [2021-06-06 00:33:17,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 50282 states and 194893 transitions. [2021-06-06 00:33:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:33:18,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:18,007 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:18,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:18,207 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:18,208 INFO L82 PathProgramCache]: Analyzing trace with hash -547667522, now seen corresponding path program 176 times [2021-06-06 00:33:18,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:18,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529540574] [2021-06-06 00:33:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:18,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:18,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529540574] [2021-06-06 00:33:18,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529540574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:18,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019972080] [2021-06-06 00:33:18,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:18,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:33:18,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:18,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:33:18,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:18,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:18,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-06 00:33:18,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:18,765 INFO L628 ElimStorePlain]: treesize reduction 51, result has 46.9 percent of original size [2021-06-06 00:33:18,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-06 00:33:18,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:108 [2021-06-06 00:33:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:18,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019972080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:18,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:18,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-06 00:33:18,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184908741] [2021-06-06 00:33:18,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:33:18,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:18,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:33:18,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:33:18,852 INFO L87 Difference]: Start difference. First operand 50282 states and 194893 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:20,094 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-06-06 00:33:21,149 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-06 00:33:21,689 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-06 00:33:21,815 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-06 00:33:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:22,958 INFO L93 Difference]: Finished difference Result 60601 states and 225495 transitions. [2021-06-06 00:33:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:33:22,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:33:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:23,105 INFO L225 Difference]: With dead ends: 60601 [2021-06-06 00:33:23,105 INFO L226 Difference]: Without dead ends: 60571 [2021-06-06 00:33:23,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 3426.0ms TimeCoverageRelationStatistics Valid=665, Invalid=3757, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:33:23,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60571 states. [2021-06-06 00:33:24,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60571 to 50303. [2021-06-06 00:33:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50303 states, 50302 states have (on average 3.8758697467297525) internal successors, (194964), 50302 states have internal predecessors, (194964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50303 states to 50303 states and 194964 transitions. [2021-06-06 00:33:24,312 INFO L78 Accepts]: Start accepts. Automaton has 50303 states and 194964 transitions. Word has length 30 [2021-06-06 00:33:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:24,312 INFO L482 AbstractCegarLoop]: Abstraction has 50303 states and 194964 transitions. [2021-06-06 00:33:24,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 50303 states and 194964 transitions. [2021-06-06 00:33:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:33:24,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:24,390 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:24,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-06 00:33:24,590 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:24,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:24,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1002714042, now seen corresponding path program 177 times [2021-06-06 00:33:24,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:24,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21741449] [2021-06-06 00:33:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:24,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:24,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21741449] [2021-06-06 00:33:24,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21741449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:24,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184132160] [2021-06-06 00:33:24,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:24,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:33:24,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:24,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-06 00:33:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:25,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:25,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:25,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 59 [2021-06-06 00:33:25,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:33:25,140 INFO L628 ElimStorePlain]: treesize reduction 73, result has 25.5 percent of original size [2021-06-06 00:33:25,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:25,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:37 [2021-06-06 00:33:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:25,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184132160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:25,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:25,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:33:25,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897169555] [2021-06-06 00:33:25,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:33:25,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:25,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:33:25,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:33:25,195 INFO L87 Difference]: Start difference. First operand 50303 states and 194964 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:26,683 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-06 00:33:27,524 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-06 00:33:28,005 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-06 00:33:28,223 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-06 00:33:28,550 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-06 00:33:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:29,949 INFO L93 Difference]: Finished difference Result 79320 states and 295712 transitions. [2021-06-06 00:33:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:33:29,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:33:29,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:30,151 INFO L225 Difference]: With dead ends: 79320 [2021-06-06 00:33:30,151 INFO L226 Difference]: Without dead ends: 79290 [2021-06-06 00:33:30,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 3982.3ms TimeCoverageRelationStatistics Valid=667, Invalid=5033, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:33:30,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79290 states. [2021-06-06 00:33:31,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79290 to 50315. [2021-06-06 00:33:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50315 states, 50314 states have (on average 3.8759391024366976) internal successors, (195014), 50314 states have internal predecessors, (195014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50315 states to 50315 states and 195014 transitions. [2021-06-06 00:33:31,524 INFO L78 Accepts]: Start accepts. Automaton has 50315 states and 195014 transitions. Word has length 30 [2021-06-06 00:33:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:31,524 INFO L482 AbstractCegarLoop]: Abstraction has 50315 states and 195014 transitions. [2021-06-06 00:33:31,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 50315 states and 195014 transitions. [2021-06-06 00:33:31,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:33:31,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:31,599 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:31,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:31,812 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:31,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2016530042, now seen corresponding path program 178 times [2021-06-06 00:33:31,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:31,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542469256] [2021-06-06 00:33:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:31,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:31,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542469256] [2021-06-06 00:33:31,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542469256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:31,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321209196] [2021-06-06 00:33:31,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:32,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:33:32,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:33:32,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:32,261 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-06 00:33:32,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-06 00:33:32,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:32,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:32,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:32,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-06 00:33:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:32,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321209196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:32,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:32,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:33:32,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648413893] [2021-06-06 00:33:32,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:33:32,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:32,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:33:32,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:33:32,285 INFO L87 Difference]: Start difference. First operand 50315 states and 195014 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:32,970 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-06 00:33:34,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:34,995 INFO L93 Difference]: Finished difference Result 61699 states and 228811 transitions. [2021-06-06 00:33:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:33:34,996 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:33:34,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:35,150 INFO L225 Difference]: With dead ends: 61699 [2021-06-06 00:33:35,151 INFO L226 Difference]: Without dead ends: 61624 [2021-06-06 00:33:35,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2238.8ms TimeCoverageRelationStatistics Valid=551, Invalid=2419, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:33:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61624 states. [2021-06-06 00:33:36,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61624 to 50371. [2021-06-06 00:33:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50371 states, 50370 states have (on average 3.8753027595791147) internal successors, (195199), 50370 states have internal predecessors, (195199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50371 states to 50371 states and 195199 transitions. [2021-06-06 00:33:36,602 INFO L78 Accepts]: Start accepts. Automaton has 50371 states and 195199 transitions. Word has length 30 [2021-06-06 00:33:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:36,602 INFO L482 AbstractCegarLoop]: Abstraction has 50371 states and 195199 transitions. [2021-06-06 00:33:36,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 50371 states and 195199 transitions. [2021-06-06 00:33:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:33:36,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:36,682 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:36,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-06 00:33:36,882 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:36,883 INFO L82 PathProgramCache]: Analyzing trace with hash -728055690, now seen corresponding path program 179 times [2021-06-06 00:33:36,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:36,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522852928] [2021-06-06 00:33:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:37,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:37,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522852928] [2021-06-06 00:33:37,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522852928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:37,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669955590] [2021-06-06 00:33:37,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:37,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:33:37,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:37,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-06 00:33:37,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:37,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:37,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:37,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:37,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:33:37,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:37,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:37,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:33:37,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-06 00:33:37,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:37,485 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-06-06 00:33:37,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:37,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:5 [2021-06-06 00:33:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:37,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669955590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:37,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:37,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-06 00:33:37,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443684131] [2021-06-06 00:33:37,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:33:37,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:37,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:33:37,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:33:37,502 INFO L87 Difference]: Start difference. First operand 50371 states and 195199 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:38,583 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-06 00:33:38,721 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-06 00:33:39,597 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-06-06 00:33:39,965 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-06-06 00:33:40,282 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-06 00:33:40,548 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-06 00:33:40,925 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-06 00:33:42,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:42,094 INFO L93 Difference]: Finished difference Result 71419 states and 267281 transitions. [2021-06-06 00:33:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-06 00:33:42,094 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:33:42,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:42,271 INFO L225 Difference]: With dead ends: 71419 [2021-06-06 00:33:42,271 INFO L226 Difference]: Without dead ends: 71404 [2021-06-06 00:33:42,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 3723.7ms TimeCoverageRelationStatistics Valid=568, Invalid=3854, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:33:42,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71404 states. [2021-06-06 00:33:43,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71404 to 50405. [2021-06-06 00:33:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50405 states, 50404 states have (on average 3.8749702404571065) internal successors, (195314), 50404 states have internal predecessors, (195314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50405 states to 50405 states and 195314 transitions. [2021-06-06 00:33:43,759 INFO L78 Accepts]: Start accepts. Automaton has 50405 states and 195314 transitions. Word has length 30 [2021-06-06 00:33:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:43,759 INFO L482 AbstractCegarLoop]: Abstraction has 50405 states and 195314 transitions. [2021-06-06 00:33:43,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 50405 states and 195314 transitions. [2021-06-06 00:33:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:33:43,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:43,839 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:44,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-06 00:33:44,039 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:44,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:44,039 INFO L82 PathProgramCache]: Analyzing trace with hash -610282946, now seen corresponding path program 180 times [2021-06-06 00:33:44,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:44,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544536080] [2021-06-06 00:33:44,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:44,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:44,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544536080] [2021-06-06 00:33:44,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544536080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:44,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702821378] [2021-06-06 00:33:44,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:44,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:33:44,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:44,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:33:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:44,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:44,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:33:44,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:44,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:44,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:33:44,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-06 00:33:44,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:44,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:44,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:44,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-06 00:33:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:44,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702821378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:44,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:44,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:33:44,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026958278] [2021-06-06 00:33:44,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:33:44,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:44,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:33:44,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:33:44,481 INFO L87 Difference]: Start difference. First operand 50405 states and 195314 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:46,307 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-06 00:33:47,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:47,504 INFO L93 Difference]: Finished difference Result 83242 states and 309514 transitions. [2021-06-06 00:33:47,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:33:47,505 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:33:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:47,705 INFO L225 Difference]: With dead ends: 83242 [2021-06-06 00:33:47,705 INFO L226 Difference]: Without dead ends: 83227 [2021-06-06 00:33:47,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 2219.4ms TimeCoverageRelationStatistics Valid=401, Invalid=3259, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:33:47,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83227 states. [2021-06-06 00:33:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83227 to 50447. [2021-06-06 00:33:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50447 states, 50446 states have (on average 3.874499464774214) internal successors, (195453), 50446 states have internal predecessors, (195453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50447 states to 50447 states and 195453 transitions. [2021-06-06 00:33:49,440 INFO L78 Accepts]: Start accepts. Automaton has 50447 states and 195453 transitions. Word has length 30 [2021-06-06 00:33:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:49,440 INFO L482 AbstractCegarLoop]: Abstraction has 50447 states and 195453 transitions. [2021-06-06 00:33:49,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 50447 states and 195453 transitions. [2021-06-06 00:33:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:33:49,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:49,518 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:49,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:49,719 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:49,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1538513590, now seen corresponding path program 181 times [2021-06-06 00:33:49,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:49,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446515425] [2021-06-06 00:33:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:49,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:49,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446515425] [2021-06-06 00:33:49,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446515425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:49,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291428518] [2021-06-06 00:33:49,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:49,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:33:49,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:50,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:50,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:33:50,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:50,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:33:50,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-06 00:33:50,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:50,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:50,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:50,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-06 00:33:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:50,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291428518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:50,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:50,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:33:50,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069902894] [2021-06-06 00:33:50,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:33:50,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:50,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:33:50,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:33:50,195 INFO L87 Difference]: Start difference. First operand 50447 states and 195453 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:52,581 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-06 00:33:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:53,717 INFO L93 Difference]: Finished difference Result 94065 states and 345973 transitions. [2021-06-06 00:33:53,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-06 00:33:53,717 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:33:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:53,946 INFO L225 Difference]: With dead ends: 94065 [2021-06-06 00:33:53,947 INFO L226 Difference]: Without dead ends: 94014 [2021-06-06 00:33:53,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2580.0ms TimeCoverageRelationStatistics Valid=507, Invalid=3653, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:33:54,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94014 states. [2021-06-06 00:33:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94014 to 50456. [2021-06-06 00:33:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50456 states, 50455 states have (on average 3.8745813100782875) internal successors, (195492), 50455 states have internal predecessors, (195492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50456 states to 50456 states and 195492 transitions. [2021-06-06 00:33:55,774 INFO L78 Accepts]: Start accepts. Automaton has 50456 states and 195492 transitions. Word has length 30 [2021-06-06 00:33:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:55,774 INFO L482 AbstractCegarLoop]: Abstraction has 50456 states and 195492 transitions. [2021-06-06 00:33:55,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand 50456 states and 195492 transitions. [2021-06-06 00:33:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:33:55,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:55,855 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:56,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:56,055 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:56,056 INFO L82 PathProgramCache]: Analyzing trace with hash -372848078, now seen corresponding path program 90 times [2021-06-06 00:33:56,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:56,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980907107] [2021-06-06 00:33:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:56,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:56,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980907107] [2021-06-06 00:33:56,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980907107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:56,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522408381] [2021-06-06 00:33:56,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:56,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:33:56,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:56,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-06 00:33:56,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:56,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:33:56,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:56,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:56,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:56,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:56,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:56,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:33:56,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:33:56,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:33:56,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-06-06 00:33:56,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:56,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:56,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:56,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:12 [2021-06-06 00:33:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:56,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522408381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:56,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:56,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-06 00:33:56,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858100022] [2021-06-06 00:33:56,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:33:56,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:56,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:33:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:33:56,752 INFO L87 Difference]: Start difference. First operand 50456 states and 195492 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:57,817 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-06 00:33:58,205 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-06 00:33:58,943 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-06 00:33:59,141 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-06 00:33:59,529 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-06 00:34:01,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:01,326 INFO L93 Difference]: Finished difference Result 63848 states and 240271 transitions. [2021-06-06 00:34:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:34:01,326 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:34:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:01,488 INFO L225 Difference]: With dead ends: 63848 [2021-06-06 00:34:01,488 INFO L226 Difference]: Without dead ends: 63833 [2021-06-06 00:34:01,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 3782.1ms TimeCoverageRelationStatistics Valid=540, Invalid=3366, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:34:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63833 states. [2021-06-06 00:34:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63833 to 50491. [2021-06-06 00:34:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50491 states, 50490 states have (on average 3.873598732422262) internal successors, (195578), 50490 states have internal predecessors, (195578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50491 states to 50491 states and 195578 transitions. [2021-06-06 00:34:02,939 INFO L78 Accepts]: Start accepts. Automaton has 50491 states and 195578 transitions. Word has length 30 [2021-06-06 00:34:02,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:02,940 INFO L482 AbstractCegarLoop]: Abstraction has 50491 states and 195578 transitions. [2021-06-06 00:34:02,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:02,940 INFO L276 IsEmpty]: Start isEmpty. Operand 50491 states and 195578 transitions. [2021-06-06 00:34:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:34:03,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:03,020 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:03,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:03,220 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:03,221 INFO L82 PathProgramCache]: Analyzing trace with hash -792944066, now seen corresponding path program 182 times [2021-06-06 00:34:03,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:03,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004679050] [2021-06-06 00:34:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:03,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:03,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004679050] [2021-06-06 00:34:03,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004679050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:03,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841203948] [2021-06-06 00:34:03,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:03,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:34:03,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:03,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:34:03,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:03,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:03,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:03,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:03,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:03,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:34:03,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:34:03,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-06 00:34:03,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:03,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:03,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:03,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-06 00:34:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:03,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841203948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:03,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:03,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:34:03,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042829032] [2021-06-06 00:34:03,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:34:03,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:03,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:34:03,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:34:03,690 INFO L87 Difference]: Start difference. First operand 50491 states and 195578 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:05,965 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-06 00:34:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:06,768 INFO L93 Difference]: Finished difference Result 84008 states and 311824 transitions. [2021-06-06 00:34:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:34:06,769 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:34:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:06,979 INFO L225 Difference]: With dead ends: 84008 [2021-06-06 00:34:06,980 INFO L226 Difference]: Without dead ends: 83993 [2021-06-06 00:34:06,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2054.1ms TimeCoverageRelationStatistics Valid=357, Invalid=2949, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:34:07,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83993 states. [2021-06-06 00:34:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83993 to 50558. [2021-06-06 00:34:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50558 states, 50557 states have (on average 3.873133295092668) internal successors, (195814), 50557 states have internal predecessors, (195814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50558 states to 50558 states and 195814 transitions. [2021-06-06 00:34:08,475 INFO L78 Accepts]: Start accepts. Automaton has 50558 states and 195814 transitions. Word has length 30 [2021-06-06 00:34:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:08,476 INFO L482 AbstractCegarLoop]: Abstraction has 50558 states and 195814 transitions. [2021-06-06 00:34:08,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 50558 states and 195814 transitions. [2021-06-06 00:34:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:34:08,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:08,558 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:08,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:08,759 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:08,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:08,759 INFO L82 PathProgramCache]: Analyzing trace with hash 956036336, now seen corresponding path program 183 times [2021-06-06 00:34:08,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:08,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668545548] [2021-06-06 00:34:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:08,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:08,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668545548] [2021-06-06 00:34:08,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668545548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:08,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077864972] [2021-06-06 00:34:08,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:08,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:34:08,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:08,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:34:08,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:09,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:09,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:34:09,575 INFO L354 Elim1Store]: treesize reduction 37, result has 49.3 percent of original size [2021-06-06 00:34:09,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 57 treesize of output 76 [2021-06-06 00:34:09,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:09,647 INFO L628 ElimStorePlain]: treesize reduction 25, result has 80.8 percent of original size [2021-06-06 00:34:09,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:09,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:75, output treesize:33 [2021-06-06 00:34:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:09,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077864972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:09,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:09,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-06 00:34:09,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2955940] [2021-06-06 00:34:09,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:34:09,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:09,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:34:09,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:34:09,705 INFO L87 Difference]: Start difference. First operand 50558 states and 195814 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:12,467 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-06-06 00:34:13,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:13,136 INFO L93 Difference]: Finished difference Result 83166 states and 309365 transitions. [2021-06-06 00:34:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:34:13,136 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:34:13,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:13,347 INFO L225 Difference]: With dead ends: 83166 [2021-06-06 00:34:13,347 INFO L226 Difference]: Without dead ends: 83136 [2021-06-06 00:34:13,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2289.8ms TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:34:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83136 states. [2021-06-06 00:34:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83136 to 50558. [2021-06-06 00:34:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50558 states, 50557 states have (on average 3.873133295092668) internal successors, (195814), 50557 states have internal predecessors, (195814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50558 states to 50558 states and 195814 transitions. [2021-06-06 00:34:14,791 INFO L78 Accepts]: Start accepts. Automaton has 50558 states and 195814 transitions. Word has length 30 [2021-06-06 00:34:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:14,791 INFO L482 AbstractCegarLoop]: Abstraction has 50558 states and 195814 transitions. [2021-06-06 00:34:14,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 50558 states and 195814 transitions. [2021-06-06 00:34:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:34:14,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:14,868 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:15,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:15,068 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:15,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1261273866, now seen corresponding path program 184 times [2021-06-06 00:34:15,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:15,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70178448] [2021-06-06 00:34:15,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:15,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:15,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70178448] [2021-06-06 00:34:15,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70178448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:15,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115031840] [2021-06-06 00:34:15,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:15,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:34:15,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:15,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:34:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:15,672 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-06 00:34:15,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:34:15,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:15,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:15,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-06 00:34:15,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:15,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:15,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:15,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-06 00:34:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:15,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115031840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:15,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:15,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:34:15,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593995025] [2021-06-06 00:34:15,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:34:15,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:15,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:34:15,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:34:15,720 INFO L87 Difference]: Start difference. First operand 50558 states and 195814 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:18,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:18,010 INFO L93 Difference]: Finished difference Result 69018 states and 261530 transitions. [2021-06-06 00:34:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:34:18,011 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:34:18,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:18,380 INFO L225 Difference]: With dead ends: 69018 [2021-06-06 00:34:18,380 INFO L226 Difference]: Without dead ends: 68952 [2021-06-06 00:34:18,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1685.5ms TimeCoverageRelationStatistics Valid=521, Invalid=2131, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:34:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68952 states. [2021-06-06 00:34:19,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68952 to 50665. [2021-06-06 00:34:19,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50665 states, 50664 states have (on average 3.873263066477183) internal successors, (196235), 50664 states have internal predecessors, (196235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50665 states to 50665 states and 196235 transitions. [2021-06-06 00:34:19,666 INFO L78 Accepts]: Start accepts. Automaton has 50665 states and 196235 transitions. Word has length 30 [2021-06-06 00:34:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:19,667 INFO L482 AbstractCegarLoop]: Abstraction has 50665 states and 196235 transitions. [2021-06-06 00:34:19,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:19,667 INFO L276 IsEmpty]: Start isEmpty. Operand 50665 states and 196235 transitions. [2021-06-06 00:34:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:34:19,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:19,745 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:19,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-06 00:34:19,945 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:19,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1005295414, now seen corresponding path program 185 times [2021-06-06 00:34:19,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:19,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014724365] [2021-06-06 00:34:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:20,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:20,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014724365] [2021-06-06 00:34:20,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014724365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:20,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796671207] [2021-06-06 00:34:20,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:20,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:34:20,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:20,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:34:20,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:20,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:34:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:20,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:20,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-06 00:34:20,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:20,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:20,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:20,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-06 00:34:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:20,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796671207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:20,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:20,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:34:20,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584983535] [2021-06-06 00:34:20,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:34:20,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:20,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:34:20,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:34:20,431 INFO L87 Difference]: Start difference. First operand 50665 states and 196235 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:22,632 INFO L93 Difference]: Finished difference Result 68874 states and 261214 transitions. [2021-06-06 00:34:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:34:22,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:34:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:22,814 INFO L225 Difference]: With dead ends: 68874 [2021-06-06 00:34:22,814 INFO L226 Difference]: Without dead ends: 68826 [2021-06-06 00:34:22,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1423.9ms TimeCoverageRelationStatistics Valid=498, Invalid=2052, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:34:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68826 states. [2021-06-06 00:34:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68826 to 50649. [2021-06-06 00:34:24,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50649 states, 50648 states have (on average 3.8736574000947717) internal successors, (196193), 50648 states have internal predecessors, (196193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50649 states to 50649 states and 196193 transitions. [2021-06-06 00:34:24,165 INFO L78 Accepts]: Start accepts. Automaton has 50649 states and 196193 transitions. Word has length 30 [2021-06-06 00:34:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:24,165 INFO L482 AbstractCegarLoop]: Abstraction has 50649 states and 196193 transitions. [2021-06-06 00:34:24,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 50649 states and 196193 transitions. [2021-06-06 00:34:24,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:34:24,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:24,249 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:24,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-06 00:34:24,449 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash -893195398, now seen corresponding path program 186 times [2021-06-06 00:34:24,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:24,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646120202] [2021-06-06 00:34:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:24,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:24,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646120202] [2021-06-06 00:34:24,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646120202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:24,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048135600] [2021-06-06 00:34:24,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:24,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:34:24,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:24,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:34:24,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:24,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:24,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:24,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:34:24,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-06 00:34:24,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:24,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:24,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:24,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-06 00:34:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:24,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048135600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:24,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:24,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:34:24,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794090379] [2021-06-06 00:34:24,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:34:24,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:24,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:34:24,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:34:24,957 INFO L87 Difference]: Start difference. First operand 50649 states and 196193 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:27,721 INFO L93 Difference]: Finished difference Result 72235 states and 271440 transitions. [2021-06-06 00:34:27,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:34:27,722 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:34:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:28,092 INFO L225 Difference]: With dead ends: 72235 [2021-06-06 00:34:28,092 INFO L226 Difference]: Without dead ends: 72163 [2021-06-06 00:34:28,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 2044.2ms TimeCoverageRelationStatistics Valid=695, Invalid=2727, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:34:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72163 states. [2021-06-06 00:34:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72163 to 50684. [2021-06-06 00:34:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50684 states, 50683 states have (on average 3.8730738117317443) internal successors, (196299), 50683 states have internal predecessors, (196299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50684 states to 50684 states and 196299 transitions. [2021-06-06 00:34:29,348 INFO L78 Accepts]: Start accepts. Automaton has 50684 states and 196299 transitions. Word has length 30 [2021-06-06 00:34:29,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:29,348 INFO L482 AbstractCegarLoop]: Abstraction has 50684 states and 196299 transitions. [2021-06-06 00:34:29,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 50684 states and 196299 transitions. [2021-06-06 00:34:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:34:29,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:29,426 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:29,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:29,627 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash -319132678, now seen corresponding path program 187 times [2021-06-06 00:34:29,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:29,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443459218] [2021-06-06 00:34:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:29,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:29,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443459218] [2021-06-06 00:34:29,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443459218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:29,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069744294] [2021-06-06 00:34:29,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:34:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:30,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-06 00:34:30,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:30,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:34:30,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:30,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:30,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:30,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:34:30,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-06 00:34:30,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:30,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:30,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:30,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:15 [2021-06-06 00:34:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:30,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069744294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:30,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:30,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-06 00:34:30,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100588485] [2021-06-06 00:34:30,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:34:30,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:30,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:34:30,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:34:30,349 INFO L87 Difference]: Start difference. First operand 50684 states and 196299 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:31,908 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-06 00:34:35,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:35,292 INFO L93 Difference]: Finished difference Result 91851 states and 339846 transitions. [2021-06-06 00:34:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:34:35,292 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:34:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:35,519 INFO L225 Difference]: With dead ends: 91851 [2021-06-06 00:34:35,520 INFO L226 Difference]: Without dead ends: 91815 [2021-06-06 00:34:35,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 3735.2ms TimeCoverageRelationStatistics Valid=631, Invalid=5221, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:34:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91815 states. [2021-06-06 00:34:36,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91815 to 50856. [2021-06-06 00:34:37,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50856 states, 50855 states have (on average 3.8713007570543705) internal successors, (196875), 50855 states have internal predecessors, (196875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50856 states to 50856 states and 196875 transitions. [2021-06-06 00:34:37,153 INFO L78 Accepts]: Start accepts. Automaton has 50856 states and 196875 transitions. Word has length 30 [2021-06-06 00:34:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:37,153 INFO L482 AbstractCegarLoop]: Abstraction has 50856 states and 196875 transitions. [2021-06-06 00:34:37,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 50856 states and 196875 transitions. [2021-06-06 00:34:37,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:34:37,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:37,231 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:37,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-06 00:34:37,432 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:37,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:37,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1890767390, now seen corresponding path program 188 times [2021-06-06 00:34:37,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:37,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504552557] [2021-06-06 00:34:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:37,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:37,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504552557] [2021-06-06 00:34:37,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504552557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:37,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440412864] [2021-06-06 00:34:37,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:37,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:34:37,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:37,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-06 00:34:37,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:37,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:37,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:37,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:37,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-06 00:34:37,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:34:37,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:37,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:34:37,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:23 [2021-06-06 00:34:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:38,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440412864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:38,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:38,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-06 00:34:38,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432535573] [2021-06-06 00:34:38,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:34:38,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:34:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:34:38,299 INFO L87 Difference]: Start difference. First operand 50856 states and 196875 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:43,068 INFO L93 Difference]: Finished difference Result 71154 states and 268043 transitions. [2021-06-06 00:34:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:34:43,069 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:34:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:43,251 INFO L225 Difference]: With dead ends: 71154 [2021-06-06 00:34:43,251 INFO L226 Difference]: Without dead ends: 71103 [2021-06-06 00:34:43,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 3846.1ms TimeCoverageRelationStatistics Valid=839, Invalid=4563, Unknown=0, NotChecked=0, Total=5402 [2021-06-06 00:34:43,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71103 states. [2021-06-06 00:34:44,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71103 to 50856. [2021-06-06 00:34:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50856 states, 50855 states have (on average 3.8713007570543705) internal successors, (196875), 50855 states have internal predecessors, (196875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50856 states to 50856 states and 196875 transitions. [2021-06-06 00:34:44,537 INFO L78 Accepts]: Start accepts. Automaton has 50856 states and 196875 transitions. Word has length 30 [2021-06-06 00:34:44,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:44,537 INFO L482 AbstractCegarLoop]: Abstraction has 50856 states and 196875 transitions. [2021-06-06 00:34:44,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:44,537 INFO L276 IsEmpty]: Start isEmpty. Operand 50856 states and 196875 transitions. [2021-06-06 00:34:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:34:44,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:44,615 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:44,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:44,816 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:44,816 INFO L82 PathProgramCache]: Analyzing trace with hash -137630626, now seen corresponding path program 189 times [2021-06-06 00:34:44,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:44,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599430158] [2021-06-06 00:34:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:44,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:44,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599430158] [2021-06-06 00:34:44,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599430158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:44,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497220424] [2021-06-06 00:34:44,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:45,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:34:45,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:45,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:34:45,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:45,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:45,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-06 00:34:45,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:45,480 INFO L628 ElimStorePlain]: treesize reduction 53, result has 45.9 percent of original size [2021-06-06 00:34:45,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:34:45,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:103 [2021-06-06 00:34:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:45,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497220424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:45,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:45,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-06 00:34:45,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190249381] [2021-06-06 00:34:45,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:34:45,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:45,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:34:45,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:34:45,572 INFO L87 Difference]: Start difference. First operand 50856 states and 196875 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:48,241 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-06 00:34:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:49,383 INFO L93 Difference]: Finished difference Result 71044 states and 267781 transitions. [2021-06-06 00:34:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:34:49,383 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:34:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:49,568 INFO L225 Difference]: With dead ends: 71044 [2021-06-06 00:34:49,568 INFO L226 Difference]: Without dead ends: 70990 [2021-06-06 00:34:49,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 2876.8ms TimeCoverageRelationStatistics Valid=670, Invalid=3886, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:34:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70990 states. [2021-06-06 00:34:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70990 to 50820. [2021-06-06 00:34:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50820 states, 50819 states have (on average 3.8718195950333536) internal successors, (196762), 50819 states have internal predecessors, (196762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50820 states to 50820 states and 196762 transitions. [2021-06-06 00:34:50,893 INFO L78 Accepts]: Start accepts. Automaton has 50820 states and 196762 transitions. Word has length 30 [2021-06-06 00:34:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:50,893 INFO L482 AbstractCegarLoop]: Abstraction has 50820 states and 196762 transitions. [2021-06-06 00:34:50,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 50820 states and 196762 transitions. [2021-06-06 00:34:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:34:50,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:50,965 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:51,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:51,165 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:51,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:51,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2075040334, now seen corresponding path program 190 times [2021-06-06 00:34:51,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:51,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736574809] [2021-06-06 00:34:51,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:51,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:51,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736574809] [2021-06-06 00:34:51,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736574809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:51,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557161329] [2021-06-06 00:34:51,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:51,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:34:51,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:51,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:34:51,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:51,767 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-06 00:34:51,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-06 00:34:51,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:51,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:51,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:51,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-06 00:34:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:51,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557161329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:51,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:51,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:34:51,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917163957] [2021-06-06 00:34:51,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:34:51,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:51,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:34:51,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:34:51,790 INFO L87 Difference]: Start difference. First operand 50820 states and 196762 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:54,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:54,809 INFO L93 Difference]: Finished difference Result 76562 states and 289629 transitions. [2021-06-06 00:34:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:34:54,809 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:34:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:55,006 INFO L225 Difference]: With dead ends: 76562 [2021-06-06 00:34:55,006 INFO L226 Difference]: Without dead ends: 76526 [2021-06-06 00:34:55,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 2016.0ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:34:55,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76526 states. [2021-06-06 00:34:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76526 to 50849. [2021-06-06 00:34:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50849 states, 50848 states have (on average 3.8721286972938955) internal successors, (196890), 50848 states have internal predecessors, (196890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50849 states to 50849 states and 196890 transitions. [2021-06-06 00:34:56,351 INFO L78 Accepts]: Start accepts. Automaton has 50849 states and 196890 transitions. Word has length 30 [2021-06-06 00:34:56,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:56,351 INFO L482 AbstractCegarLoop]: Abstraction has 50849 states and 196890 transitions. [2021-06-06 00:34:56,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:56,351 INFO L276 IsEmpty]: Start isEmpty. Operand 50849 states and 196890 transitions. [2021-06-06 00:34:56,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:34:56,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:56,430 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:56,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:56,631 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:56,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2052117870, now seen corresponding path program 191 times [2021-06-06 00:34:56,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:56,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443723134] [2021-06-06 00:34:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:56,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:56,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443723134] [2021-06-06 00:34:56,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443723134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:56,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942523588] [2021-06-06 00:34:56,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:56,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:34:56,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:34:56,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:34:56,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:34:56,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-06 00:34:56,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:57,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:57,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:57,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-06 00:34:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:57,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942523588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:57,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:57,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-06 00:34:57,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5608616] [2021-06-06 00:34:57,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:34:57,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:57,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:34:57,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:34:57,026 INFO L87 Difference]: Start difference. First operand 50849 states and 196890 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:58,376 INFO L93 Difference]: Finished difference Result 60558 states and 229990 transitions. [2021-06-06 00:34:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:34:58,377 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:34:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:58,541 INFO L225 Difference]: With dead ends: 60558 [2021-06-06 00:34:58,541 INFO L226 Difference]: Without dead ends: 60543 [2021-06-06 00:34:58,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 781.9ms TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:34:58,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60543 states. [2021-06-06 00:34:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60543 to 50841. [2021-06-06 00:34:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50841 states, 50840 states have (on average 3.8721872541306057) internal successors, (196862), 50840 states have internal predecessors, (196862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50841 states to 50841 states and 196862 transitions. [2021-06-06 00:34:59,817 INFO L78 Accepts]: Start accepts. Automaton has 50841 states and 196862 transitions. Word has length 30 [2021-06-06 00:34:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:59,818 INFO L482 AbstractCegarLoop]: Abstraction has 50841 states and 196862 transitions. [2021-06-06 00:34:59,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 50841 states and 196862 transitions. [2021-06-06 00:34:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:34:59,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:59,895 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:00,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:00,095 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:00,095 INFO L82 PathProgramCache]: Analyzing trace with hash -15398158, now seen corresponding path program 192 times [2021-06-06 00:35:00,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:00,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343007729] [2021-06-06 00:35:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:00,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:00,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343007729] [2021-06-06 00:35:00,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343007729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:00,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458883969] [2021-06-06 00:35:00,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:00,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:35:00,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:00,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-06 00:35:00,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:00,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:00,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 27 treesize of output 71 [2021-06-06 00:35:00,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:35:00,712 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-06-06 00:35:00,713 INFO L628 ElimStorePlain]: treesize reduction 217, result has 29.5 percent of original size [2021-06-06 00:35:00,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:00,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:200 [2021-06-06 00:35:00,861 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-06-06 00:35:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:00,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458883969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:00,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:01,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-06-06 00:35:01,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448922042] [2021-06-06 00:35:01,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:35:01,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:01,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:35:01,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:35:01,000 INFO L87 Difference]: Start difference. First operand 50841 states and 196862 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:01,476 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-06-06 00:35:04,420 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-06 00:35:04,837 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-06 00:35:06,924 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-06-06 00:35:07,495 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-06 00:35:07,812 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-06 00:35:08,132 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-06 00:35:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:08,626 INFO L93 Difference]: Finished difference Result 81005 states and 305937 transitions. [2021-06-06 00:35:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-06 00:35:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:35:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:08,842 INFO L225 Difference]: With dead ends: 81005 [2021-06-06 00:35:08,842 INFO L226 Difference]: Without dead ends: 80960 [2021-06-06 00:35:08,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3094 ImplicationChecksByTransitivity, 6142.0ms TimeCoverageRelationStatistics Valid=1313, Invalid=7807, Unknown=0, NotChecked=0, Total=9120 [2021-06-06 00:35:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80960 states. [2021-06-06 00:35:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80960 to 50848. [2021-06-06 00:35:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50848 states, 50847 states have (on average 3.8721851829999805) internal successors, (196889), 50847 states have internal predecessors, (196889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50848 states to 50848 states and 196889 transitions. [2021-06-06 00:35:10,362 INFO L78 Accepts]: Start accepts. Automaton has 50848 states and 196889 transitions. Word has length 30 [2021-06-06 00:35:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:10,362 INFO L482 AbstractCegarLoop]: Abstraction has 50848 states and 196889 transitions. [2021-06-06 00:35:10,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 50848 states and 196889 transitions. [2021-06-06 00:35:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:35:10,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:10,447 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:10,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-06 00:35:10,647 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash -512119518, now seen corresponding path program 193 times [2021-06-06 00:35:10,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:10,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503701740] [2021-06-06 00:35:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:10,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:10,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503701740] [2021-06-06 00:35:10,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503701740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:10,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044575290] [2021-06-06 00:35:10,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:10,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:35:10,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:11,151 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-06 00:35:11,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-06 00:35:11,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:11,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:11,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:11,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-06 00:35:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:11,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044575290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:11,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:11,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:35:11,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713801491] [2021-06-06 00:35:11,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:35:11,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:11,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:35:11,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:35:11,176 INFO L87 Difference]: Start difference. First operand 50848 states and 196889 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:11,933 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-06 00:35:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:14,154 INFO L93 Difference]: Finished difference Result 77700 states and 291511 transitions. [2021-06-06 00:35:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:35:14,155 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:35:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:14,363 INFO L225 Difference]: With dead ends: 77700 [2021-06-06 00:35:14,363 INFO L226 Difference]: Without dead ends: 77655 [2021-06-06 00:35:14,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 2187.4ms TimeCoverageRelationStatistics Valid=677, Invalid=2745, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:35:14,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77655 states. [2021-06-06 00:35:15,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77655 to 50905. [2021-06-06 00:35:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50905 states, 50904 states have (on average 3.873035517837498) internal successors, (197153), 50904 states have internal predecessors, (197153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50905 states to 50905 states and 197153 transitions. [2021-06-06 00:35:15,888 INFO L78 Accepts]: Start accepts. Automaton has 50905 states and 197153 transitions. Word has length 30 [2021-06-06 00:35:15,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:15,889 INFO L482 AbstractCegarLoop]: Abstraction has 50905 states and 197153 transitions. [2021-06-06 00:35:15,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 50905 states and 197153 transitions. [2021-06-06 00:35:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:35:15,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:15,968 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:16,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:16,169 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:16,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2129652298, now seen corresponding path program 194 times [2021-06-06 00:35:16,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:16,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003751145] [2021-06-06 00:35:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:16,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:16,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003751145] [2021-06-06 00:35:16,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003751145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:16,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822852413] [2021-06-06 00:35:16,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:16,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:35:16,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:16,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:35:16,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:16,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:35:16,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:35:16,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:16,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-06 00:35:16,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:35:16,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:16,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:35:16,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:23 [2021-06-06 00:35:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:16,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822852413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:16,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:16,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:35:16,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307051834] [2021-06-06 00:35:16,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:35:16,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:16,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:35:16,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:35:16,628 INFO L87 Difference]: Start difference. First operand 50905 states and 197153 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:20,710 INFO L93 Difference]: Finished difference Result 83144 states and 313968 transitions. [2021-06-06 00:35:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-06 00:35:20,710 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:35:20,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:21,116 INFO L225 Difference]: With dead ends: 83144 [2021-06-06 00:35:21,116 INFO L226 Difference]: Without dead ends: 83114 [2021-06-06 00:35:21,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 2725.9ms TimeCoverageRelationStatistics Valid=1067, Invalid=4633, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:35:21,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83114 states. [2021-06-06 00:35:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83114 to 50927. [2021-06-06 00:35:22,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50927 states, 50926 states have (on average 3.873443820445352) internal successors, (197259), 50926 states have internal predecessors, (197259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50927 states to 50927 states and 197259 transitions. [2021-06-06 00:35:22,502 INFO L78 Accepts]: Start accepts. Automaton has 50927 states and 197259 transitions. Word has length 30 [2021-06-06 00:35:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:22,502 INFO L482 AbstractCegarLoop]: Abstraction has 50927 states and 197259 transitions. [2021-06-06 00:35:22,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 50927 states and 197259 transitions. [2021-06-06 00:35:22,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:35:22,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:22,581 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:22,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-06 00:35:22,797 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:22,797 INFO L82 PathProgramCache]: Analyzing trace with hash 382550838, now seen corresponding path program 195 times [2021-06-06 00:35:22,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:22,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519690424] [2021-06-06 00:35:22,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:23,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:23,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519690424] [2021-06-06 00:35:23,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519690424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:23,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912859528] [2021-06-06 00:35:23,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:23,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:35:23,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:23,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:35:23,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:23,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:23,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-06 00:35:23,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:23,349 INFO L628 ElimStorePlain]: treesize reduction 51, result has 46.9 percent of original size [2021-06-06 00:35:23,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-06 00:35:23,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:83 [2021-06-06 00:35:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:23,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912859528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:23,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:23,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-06 00:35:23,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187345683] [2021-06-06 00:35:23,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:35:23,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:23,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:35:23,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:35:23,431 INFO L87 Difference]: Start difference. First operand 50927 states and 197259 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:24,660 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-06 00:35:26,144 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-06 00:35:27,142 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-06 00:35:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:28,127 INFO L93 Difference]: Finished difference Result 74529 states and 282265 transitions. [2021-06-06 00:35:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:35:28,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:35:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:28,321 INFO L225 Difference]: With dead ends: 74529 [2021-06-06 00:35:28,321 INFO L226 Difference]: Without dead ends: 74499 [2021-06-06 00:35:28,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 3343.7ms TimeCoverageRelationStatistics Valid=826, Invalid=4144, Unknown=0, NotChecked=0, Total=4970 [2021-06-06 00:35:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74499 states. [2021-06-06 00:35:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74499 to 50939. [2021-06-06 00:35:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50939 states, 50938 states have (on average 3.8735717931603126) internal successors, (197312), 50938 states have internal predecessors, (197312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:29,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50939 states to 50939 states and 197312 transitions. [2021-06-06 00:35:29,736 INFO L78 Accepts]: Start accepts. Automaton has 50939 states and 197312 transitions. Word has length 30 [2021-06-06 00:35:29,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:29,736 INFO L482 AbstractCegarLoop]: Abstraction has 50939 states and 197312 transitions. [2021-06-06 00:35:29,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:29,736 INFO L276 IsEmpty]: Start isEmpty. Operand 50939 states and 197312 transitions. [2021-06-06 00:35:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:35:29,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:29,817 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:30,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-06-06 00:35:30,017 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash 956613558, now seen corresponding path program 196 times [2021-06-06 00:35:30,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:30,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6027961] [2021-06-06 00:35:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:30,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:30,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6027961] [2021-06-06 00:35:30,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6027961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:30,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714896553] [2021-06-06 00:35:30,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:30,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:35:30,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:30,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-06 00:35:30,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:35:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:35:30,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:35:30,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:35:30,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:35:30,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:35:30,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-06-06 00:35:30,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:30,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:30,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:30,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:22 [2021-06-06 00:35:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:30,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714896553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:30,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:30,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-06 00:35:30,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123254147] [2021-06-06 00:35:30,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:35:30,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:30,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:35:30,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:35:30,573 INFO L87 Difference]: Start difference. First operand 50939 states and 197312 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:31,524 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-06 00:35:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:37,055 INFO L93 Difference]: Finished difference Result 97250 states and 359275 transitions. [2021-06-06 00:35:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-06 00:35:37,056 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:35:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:37,313 INFO L225 Difference]: With dead ends: 97250 [2021-06-06 00:35:37,313 INFO L226 Difference]: Without dead ends: 97199 [2021-06-06 00:35:37,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 4674.9ms TimeCoverageRelationStatistics Valid=1104, Invalid=7452, Unknown=0, NotChecked=0, Total=8556 [2021-06-06 00:35:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97199 states. [2021-06-06 00:35:38,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97199 to 51032. [2021-06-06 00:35:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51032 states, 51031 states have (on average 3.874292096960671) internal successors, (197709), 51031 states have internal predecessors, (197709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51032 states to 51032 states and 197709 transitions. [2021-06-06 00:35:39,002 INFO L78 Accepts]: Start accepts. Automaton has 51032 states and 197709 transitions. Word has length 30 [2021-06-06 00:35:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:39,002 INFO L482 AbstractCegarLoop]: Abstraction has 51032 states and 197709 transitions. [2021-06-06 00:35:39,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 51032 states and 197709 transitions. [2021-06-06 00:35:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:35:39,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:39,087 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:39,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:39,287 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:39,287 INFO L82 PathProgramCache]: Analyzing trace with hash 354888434, now seen corresponding path program 197 times [2021-06-06 00:35:39,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:39,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647863229] [2021-06-06 00:35:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:39,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:39,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647863229] [2021-06-06 00:35:39,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647863229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:39,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55954352] [2021-06-06 00:35:39,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:39,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:35:39,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:39,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:35:39,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:35:39,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:35:39,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:39,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-06 00:35:39,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:35:39,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:39,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:35:39,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:23 [2021-06-06 00:35:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:39,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55954352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:39,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:39,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:35:39,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221747320] [2021-06-06 00:35:39,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:35:39,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:39,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:35:39,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:35:39,734 INFO L87 Difference]: Start difference. First operand 51032 states and 197709 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:41,459 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-06-06 00:35:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:43,125 INFO L93 Difference]: Finished difference Result 84956 states and 320071 transitions. [2021-06-06 00:35:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-06 00:35:43,126 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:35:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:43,358 INFO L225 Difference]: With dead ends: 84956 [2021-06-06 00:35:43,358 INFO L226 Difference]: Without dead ends: 84926 [2021-06-06 00:35:43,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 2535.7ms TimeCoverageRelationStatistics Valid=1060, Invalid=4052, Unknown=0, NotChecked=0, Total=5112 [2021-06-06 00:35:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84926 states. [2021-06-06 00:35:44,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84926 to 51051. [2021-06-06 00:35:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51051 states, 51050 states have (on average 3.874828599412341) internal successors, (197810), 51050 states have internal predecessors, (197810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51051 states to 51051 states and 197810 transitions. [2021-06-06 00:35:45,048 INFO L78 Accepts]: Start accepts. Automaton has 51051 states and 197810 transitions. Word has length 30 [2021-06-06 00:35:45,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:45,048 INFO L482 AbstractCegarLoop]: Abstraction has 51051 states and 197810 transitions. [2021-06-06 00:35:45,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:45,048 INFO L276 IsEmpty]: Start isEmpty. Operand 51051 states and 197810 transitions. [2021-06-06 00:35:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:35:45,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:45,133 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:45,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:45,333 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash 375624962, now seen corresponding path program 198 times [2021-06-06 00:35:45,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:45,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966019003] [2021-06-06 00:35:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:45,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:45,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966019003] [2021-06-06 00:35:45,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966019003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:45,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875624764] [2021-06-06 00:35:45,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:45,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:35:45,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:45,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:35:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:45,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:35:45,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:45,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 31 [2021-06-06 00:35:45,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:45,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:45,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:45,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-06 00:35:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:45,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875624764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:45,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:45,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-06 00:35:45,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99484684] [2021-06-06 00:35:45,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:35:45,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:45,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:35:45,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:35:45,859 INFO L87 Difference]: Start difference. First operand 51051 states and 197810 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:48,678 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-06 00:35:48,991 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-06 00:35:49,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:49,718 INFO L93 Difference]: Finished difference Result 78799 states and 296374 transitions. [2021-06-06 00:35:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:35:49,718 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:35:49,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:49,929 INFO L225 Difference]: With dead ends: 78799 [2021-06-06 00:35:49,929 INFO L226 Difference]: Without dead ends: 78784 [2021-06-06 00:35:49,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 2905.7ms TimeCoverageRelationStatistics Valid=747, Invalid=3543, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:35:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78784 states. [2021-06-06 00:35:51,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78784 to 51046. [2021-06-06 00:35:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51046 states, 51045 states have (on average 3.8747771574101284) internal successors, (197788), 51045 states have internal predecessors, (197788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51046 states to 51046 states and 197788 transitions. [2021-06-06 00:35:51,531 INFO L78 Accepts]: Start accepts. Automaton has 51046 states and 197788 transitions. Word has length 30 [2021-06-06 00:35:51,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:51,531 INFO L482 AbstractCegarLoop]: Abstraction has 51046 states and 197788 transitions. [2021-06-06 00:35:51,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:51,532 INFO L276 IsEmpty]: Start isEmpty. Operand 51046 states and 197788 transitions. [2021-06-06 00:35:51,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:35:51,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:51,612 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:51,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-06 00:35:51,813 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:51,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:51,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2136041370, now seen corresponding path program 199 times [2021-06-06 00:35:51,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:51,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259733552] [2021-06-06 00:35:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:51,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:51,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259733552] [2021-06-06 00:35:51,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259733552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:51,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695329096] [2021-06-06 00:35:51,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:52,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-06 00:35:52,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:52,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:35:52,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:35:52,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:35:52,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:35:52,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:35:52,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:35:52,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-06-06 00:35:52,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:52,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:52,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:52,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:22 [2021-06-06 00:35:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:52,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695329096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:52,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:52,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-06 00:35:52,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604526767] [2021-06-06 00:35:52,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:35:52,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:52,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:35:52,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:35:52,362 INFO L87 Difference]: Start difference. First operand 51046 states and 197788 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:53,988 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-06 00:35:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:58,171 INFO L93 Difference]: Finished difference Result 96322 states and 356717 transitions. [2021-06-06 00:35:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-06 00:35:58,172 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:35:58,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:58,425 INFO L225 Difference]: With dead ends: 96322 [2021-06-06 00:35:58,425 INFO L226 Difference]: Without dead ends: 96271 [2021-06-06 00:35:58,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 4374.9ms TimeCoverageRelationStatistics Valid=1004, Invalid=6478, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:35:58,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96271 states. [2021-06-06 00:35:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96271 to 51050. [2021-06-06 00:35:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51050 states, 51049 states have (on average 3.874826147426982) internal successors, (197806), 51049 states have internal predecessors, (197806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51050 states to 51050 states and 197806 transitions. [2021-06-06 00:36:00,058 INFO L78 Accepts]: Start accepts. Automaton has 51050 states and 197806 transitions. Word has length 30 [2021-06-06 00:36:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:00,058 INFO L482 AbstractCegarLoop]: Abstraction has 51050 states and 197806 transitions. [2021-06-06 00:36:00,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 51050 states and 197806 transitions. [2021-06-06 00:36:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:36:00,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:00,396 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:00,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-06 00:36:00,609 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:00,609 INFO L82 PathProgramCache]: Analyzing trace with hash -302392718, now seen corresponding path program 200 times [2021-06-06 00:36:00,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:00,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422004214] [2021-06-06 00:36:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:00,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:00,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422004214] [2021-06-06 00:36:00,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422004214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:00,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721784678] [2021-06-06 00:36:00,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:00,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:36:00,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:00,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:36:00,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:00,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:00,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:00,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:00,989 INFO L354 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2021-06-06 00:36:00,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 82 treesize of output 80 [2021-06-06 00:36:00,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:01,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:01,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:01,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:87, output treesize:22 [2021-06-06 00:36:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:01,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721784678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:01,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:01,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-06 00:36:01,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50627698] [2021-06-06 00:36:01,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:36:01,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:01,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:36:01,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:36:01,047 INFO L87 Difference]: Start difference. First operand 51050 states and 197806 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:03,612 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-06 00:36:04,438 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-06 00:36:05,590 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-06 00:36:06,118 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-06 00:36:07,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:07,274 INFO L93 Difference]: Finished difference Result 98122 states and 365133 transitions. [2021-06-06 00:36:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-06 00:36:07,274 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:36:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:07,552 INFO L225 Difference]: With dead ends: 98122 [2021-06-06 00:36:07,552 INFO L226 Difference]: Without dead ends: 98092 [2021-06-06 00:36:07,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2561 ImplicationChecksByTransitivity, 4577.0ms TimeCoverageRelationStatistics Valid=993, Invalid=6839, Unknown=0, NotChecked=0, Total=7832 [2021-06-06 00:36:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98092 states. [2021-06-06 00:36:08,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98092 to 51052. [2021-06-06 00:36:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51052 states, 51051 states have (on average 3.874850639556522) internal successors, (197815), 51051 states have internal predecessors, (197815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51052 states to 51052 states and 197815 transitions. [2021-06-06 00:36:09,181 INFO L78 Accepts]: Start accepts. Automaton has 51052 states and 197815 transitions. Word has length 30 [2021-06-06 00:36:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:09,181 INFO L482 AbstractCegarLoop]: Abstraction has 51052 states and 197815 transitions. [2021-06-06 00:36:09,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 51052 states and 197815 transitions. [2021-06-06 00:36:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:36:09,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:09,270 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:09,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:09,471 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:09,471 INFO L82 PathProgramCache]: Analyzing trace with hash -225306266, now seen corresponding path program 201 times [2021-06-06 00:36:09,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:09,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318052539] [2021-06-06 00:36:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:09,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:09,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318052539] [2021-06-06 00:36:09,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318052539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:09,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705043375] [2021-06-06 00:36:09,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:09,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:36:09,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:09,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:36:09,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:09,995 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-06 00:36:10,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:10,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-06 00:36:10,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:10,329 INFO L628 ElimStorePlain]: treesize reduction 68, result has 39.8 percent of original size [2021-06-06 00:36:10,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:36:10,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:82 [2021-06-06 00:36:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:10,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705043375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:10,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:10,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-06 00:36:10,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576638208] [2021-06-06 00:36:10,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:36:10,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:10,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:36:10,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:36:10,425 INFO L87 Difference]: Start difference. First operand 51052 states and 197815 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:13,362 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-06 00:36:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:14,565 INFO L93 Difference]: Finished difference Result 63398 states and 235417 transitions. [2021-06-06 00:36:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:36:14,566 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:36:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:14,728 INFO L225 Difference]: With dead ends: 63398 [2021-06-06 00:36:14,728 INFO L226 Difference]: Without dead ends: 63290 [2021-06-06 00:36:14,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3093.1ms TimeCoverageRelationStatistics Valid=699, Invalid=3333, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:36:14,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63290 states. [2021-06-06 00:36:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63290 to 51149. [2021-06-06 00:36:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51149 states, 51148 states have (on average 3.875674513177446) internal successors, (198233), 51148 states have internal predecessors, (198233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:16,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51149 states to 51149 states and 198233 transitions. [2021-06-06 00:36:16,035 INFO L78 Accepts]: Start accepts. Automaton has 51149 states and 198233 transitions. Word has length 30 [2021-06-06 00:36:16,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:16,035 INFO L482 AbstractCegarLoop]: Abstraction has 51149 states and 198233 transitions. [2021-06-06 00:36:16,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:16,035 INFO L276 IsEmpty]: Start isEmpty. Operand 51149 states and 198233 transitions. [2021-06-06 00:36:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:36:16,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:16,124 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:16,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-06 00:36:16,324 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash 348756454, now seen corresponding path program 202 times [2021-06-06 00:36:16,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:16,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883056598] [2021-06-06 00:36:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:16,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:16,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883056598] [2021-06-06 00:36:16,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883056598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:16,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806609329] [2021-06-06 00:36:16,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:16,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:36:16,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:16,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:36:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:16,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:16,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:16,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:16,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:36:16,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:16,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:36:16,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-06 00:36:16,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:16,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:16,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:16,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-06 00:36:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:16,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806609329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:16,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:16,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:36:16,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501936911] [2021-06-06 00:36:16,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:36:16,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:16,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:36:16,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:36:16,774 INFO L87 Difference]: Start difference. First operand 51149 states and 198233 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:17,004 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-06 00:36:20,220 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-06 00:36:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:21,294 INFO L93 Difference]: Finished difference Result 90253 states and 334745 transitions. [2021-06-06 00:36:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:36:21,295 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:36:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:21,519 INFO L225 Difference]: With dead ends: 90253 [2021-06-06 00:36:21,520 INFO L226 Difference]: Without dead ends: 90208 [2021-06-06 00:36:21,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 3217.1ms TimeCoverageRelationStatistics Valid=745, Invalid=5417, Unknown=0, NotChecked=0, Total=6162 [2021-06-06 00:36:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90208 states. [2021-06-06 00:36:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90208 to 51198. [2021-06-06 00:36:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51198 states, 51197 states have (on average 3.875871633103502) internal successors, (198433), 51197 states have internal predecessors, (198433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51198 states to 51198 states and 198433 transitions. [2021-06-06 00:36:23,324 INFO L78 Accepts]: Start accepts. Automaton has 51198 states and 198433 transitions. Word has length 30 [2021-06-06 00:36:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:23,324 INFO L482 AbstractCegarLoop]: Abstraction has 51198 states and 198433 transitions. [2021-06-06 00:36:23,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 51198 states and 198433 transitions. [2021-06-06 00:36:23,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:36:23,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:23,411 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:23,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:23,612 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:23,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:23,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1442848042, now seen corresponding path program 203 times [2021-06-06 00:36:23,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:23,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490486643] [2021-06-06 00:36:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:23,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:23,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490486643] [2021-06-06 00:36:23,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490486643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:23,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908474221] [2021-06-06 00:36:23,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:23,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:36:23,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:23,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:36:23,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:23,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:23,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:23,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:23,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:23,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:23,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:23,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:23,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:23,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 55 [2021-06-06 00:36:23,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:36:23,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:23,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:23,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:22 [2021-06-06 00:36:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:24,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908474221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:24,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:24,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-06 00:36:24,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517856847] [2021-06-06 00:36:24,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:36:24,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:24,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:36:24,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:36:24,039 INFO L87 Difference]: Start difference. First operand 51198 states and 198433 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:26,448 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-06 00:36:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:29,884 INFO L93 Difference]: Finished difference Result 89164 states and 331673 transitions. [2021-06-06 00:36:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:36:29,884 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:36:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:30,114 INFO L225 Difference]: With dead ends: 89164 [2021-06-06 00:36:30,114 INFO L226 Difference]: Without dead ends: 89134 [2021-06-06 00:36:30,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 3637.2ms TimeCoverageRelationStatistics Valid=760, Invalid=7796, Unknown=0, NotChecked=0, Total=8556 [2021-06-06 00:36:30,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89134 states. [2021-06-06 00:36:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89134 to 51198. [2021-06-06 00:36:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51198 states, 51197 states have (on average 3.875754438736645) internal successors, (198427), 51197 states have internal predecessors, (198427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51198 states to 51198 states and 198427 transitions. [2021-06-06 00:36:31,649 INFO L78 Accepts]: Start accepts. Automaton has 51198 states and 198427 transitions. Word has length 30 [2021-06-06 00:36:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:31,649 INFO L482 AbstractCegarLoop]: Abstraction has 51198 states and 198427 transitions. [2021-06-06 00:36:31,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 51198 states and 198427 transitions. [2021-06-06 00:36:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:36:31,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:31,726 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:31,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:31,927 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:31,927 INFO L82 PathProgramCache]: Analyzing trace with hash -703322718, now seen corresponding path program 204 times [2021-06-06 00:36:31,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:31,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922491863] [2021-06-06 00:36:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:32,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:32,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922491863] [2021-06-06 00:36:32,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922491863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:32,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260596987] [2021-06-06 00:36:32,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:32,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:36:32,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:32,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:36:32,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:32,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:32,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:32,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:36:32,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:32,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:36:32,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-06 00:36:32,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:32,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:32,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:32,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-06 00:36:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:32,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260596987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:32,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:32,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:36:32,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140471173] [2021-06-06 00:36:32,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:36:32,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:32,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:36:32,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:36:32,373 INFO L87 Difference]: Start difference. First operand 51198 states and 198427 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:33,002 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-06-06 00:36:36,144 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-06 00:36:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:37,324 INFO L93 Difference]: Finished difference Result 100466 states and 369497 transitions. [2021-06-06 00:36:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-06 00:36:37,325 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:36:37,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:37,638 INFO L225 Difference]: With dead ends: 100466 [2021-06-06 00:36:37,638 INFO L226 Difference]: Without dead ends: 100421 [2021-06-06 00:36:37,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 3705.6ms TimeCoverageRelationStatistics Valid=949, Invalid=6191, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:36:37,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100421 states. [2021-06-06 00:36:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100421 to 51219. [2021-06-06 00:36:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51219 states, 51218 states have (on average 3.875727283376938) internal successors, (198507), 51218 states have internal predecessors, (198507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51219 states to 51219 states and 198507 transitions. [2021-06-06 00:36:39,851 INFO L78 Accepts]: Start accepts. Automaton has 51219 states and 198507 transitions. Word has length 30 [2021-06-06 00:36:39,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:39,852 INFO L482 AbstractCegarLoop]: Abstraction has 51219 states and 198507 transitions. [2021-06-06 00:36:39,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:39,852 INFO L276 IsEmpty]: Start isEmpty. Operand 51219 states and 198507 transitions. [2021-06-06 00:36:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:36:39,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:39,940 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:40,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:40,141 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:40,141 INFO L82 PathProgramCache]: Analyzing trace with hash 103853306, now seen corresponding path program 205 times [2021-06-06 00:36:40,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:40,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286487170] [2021-06-06 00:36:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:40,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:40,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286487170] [2021-06-06 00:36:40,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286487170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:40,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464627561] [2021-06-06 00:36:40,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:36:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:40,606 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-06 00:36:40,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-06 00:36:40,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:40,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:40,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:40,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-06 00:36:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:40,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464627561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:40,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:40,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:36:40,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945781856] [2021-06-06 00:36:40,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:36:40,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:40,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:36:40,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:36:40,628 INFO L87 Difference]: Start difference. First operand 51219 states and 198507 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:43,011 INFO L93 Difference]: Finished difference Result 72664 states and 274266 transitions. [2021-06-06 00:36:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:36:43,012 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:36:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:43,187 INFO L225 Difference]: With dead ends: 72664 [2021-06-06 00:36:43,187 INFO L226 Difference]: Without dead ends: 72586 [2021-06-06 00:36:43,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1445.1ms TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:36:43,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72586 states. [2021-06-06 00:36:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72586 to 51288. [2021-06-06 00:36:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51288 states, 51287 states have (on average 3.8757969855908905) internal successors, (198778), 51287 states have internal predecessors, (198778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51288 states to 51288 states and 198778 transitions. [2021-06-06 00:36:44,609 INFO L78 Accepts]: Start accepts. Automaton has 51288 states and 198778 transitions. Word has length 30 [2021-06-06 00:36:44,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:44,609 INFO L482 AbstractCegarLoop]: Abstraction has 51288 states and 198778 transitions. [2021-06-06 00:36:44,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:44,609 INFO L276 IsEmpty]: Start isEmpty. Operand 51288 states and 198778 transitions. [2021-06-06 00:36:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:36:44,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:44,695 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:44,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-06 00:36:44,896 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:44,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1693723682, now seen corresponding path program 206 times [2021-06-06 00:36:44,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:44,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339775624] [2021-06-06 00:36:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:45,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:45,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339775624] [2021-06-06 00:36:45,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339775624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:45,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778151441] [2021-06-06 00:36:45,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:45,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:36:45,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:45,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:36:45,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:45,301 INFO L354 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2021-06-06 00:36:45,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 66 [2021-06-06 00:36:45,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:45,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:45,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:45,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:17 [2021-06-06 00:36:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:45,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778151441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:45,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:45,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-06 00:36:45,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35150845] [2021-06-06 00:36:45,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:36:45,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:45,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:36:45,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:36:45,347 INFO L87 Difference]: Start difference. First operand 51288 states and 198778 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:48,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:48,877 INFO L93 Difference]: Finished difference Result 74850 states and 281175 transitions. [2021-06-06 00:36:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:36:48,877 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:36:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:49,070 INFO L225 Difference]: With dead ends: 74850 [2021-06-06 00:36:49,071 INFO L226 Difference]: Without dead ends: 74784 [2021-06-06 00:36:49,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 2502.1ms TimeCoverageRelationStatistics Valid=630, Invalid=2792, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:36:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74784 states. [2021-06-06 00:36:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74784 to 51286. [2021-06-06 00:36:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51286 states, 51285 states have (on average 3.8756556498001364) internal successors, (198763), 51285 states have internal predecessors, (198763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51286 states to 51286 states and 198763 transitions. [2021-06-06 00:36:50,424 INFO L78 Accepts]: Start accepts. Automaton has 51286 states and 198763 transitions. Word has length 30 [2021-06-06 00:36:50,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:50,424 INFO L482 AbstractCegarLoop]: Abstraction has 51286 states and 198763 transitions. [2021-06-06 00:36:50,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 51286 states and 198763 transitions. [2021-06-06 00:36:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:36:50,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:50,519 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:50,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-06 00:36:50,719 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:50,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:50,720 INFO L82 PathProgramCache]: Analyzing trace with hash -2086344974, now seen corresponding path program 207 times [2021-06-06 00:36:50,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:50,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283000295] [2021-06-06 00:36:50,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:50,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:50,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283000295] [2021-06-06 00:36:50,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283000295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:50,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972367289] [2021-06-06 00:36:50,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:50,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:36:50,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:50,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:36:50,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:51,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:36:51,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:51,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 79 [2021-06-06 00:36:51,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:36:51,640 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 73 [2021-06-06 00:36:51,641 INFO L628 ElimStorePlain]: treesize reduction 588, result has 22.5 percent of original size [2021-06-06 00:36:51,894 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2021-06-06 00:36:51,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:51,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:756 [2021-06-06 00:36:52,265 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2021-06-06 00:36:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:52,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972367289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:52,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:52,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-06 00:36:52,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174457120] [2021-06-06 00:36:52,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:36:52,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:52,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:36:52,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:36:52,436 INFO L87 Difference]: Start difference. First operand 51286 states and 198763 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:53,345 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 39 [2021-06-06 00:36:57,615 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-06 00:36:57,869 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-06 00:36:58,078 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-06 00:36:58,209 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2021-06-06 00:36:58,438 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-06-06 00:36:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:58,883 INFO L93 Difference]: Finished difference Result 99242 states and 366200 transitions. [2021-06-06 00:36:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-06 00:36:58,883 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:36:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:59,164 INFO L225 Difference]: With dead ends: 99242 [2021-06-06 00:36:59,164 INFO L226 Difference]: Without dead ends: 99212 [2021-06-06 00:36:59,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 5082.3ms TimeCoverageRelationStatistics Valid=882, Invalid=6774, Unknown=0, NotChecked=0, Total=7656 [2021-06-06 00:36:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99212 states. [2021-06-06 00:37:00,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99212 to 51295. [2021-06-06 00:37:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51295 states, 51294 states have (on average 3.875560494404804) internal successors, (198793), 51294 states have internal predecessors, (198793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51295 states to 51295 states and 198793 transitions. [2021-06-06 00:37:00,828 INFO L78 Accepts]: Start accepts. Automaton has 51295 states and 198793 transitions. Word has length 30 [2021-06-06 00:37:00,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:00,828 INFO L482 AbstractCegarLoop]: Abstraction has 51295 states and 198793 transitions. [2021-06-06 00:37:00,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:00,828 INFO L276 IsEmpty]: Start isEmpty. Operand 51295 states and 198793 transitions. [2021-06-06 00:37:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:37:00,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:00,910 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:01,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:01,110 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:01,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:01,111 INFO L82 PathProgramCache]: Analyzing trace with hash 714714600, now seen corresponding path program 208 times [2021-06-06 00:37:01,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:01,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239005129] [2021-06-06 00:37:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:01,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:01,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:01,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239005129] [2021-06-06 00:37:01,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239005129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:01,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353974612] [2021-06-06 00:37:01,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:01,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:37:01,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:37:01,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:37:01,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:01,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:01,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:01,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:01,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:37:01,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:01,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:37:01,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-06 00:37:01,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:37:01,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:37:01,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:37:01,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-06 00:37:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:01,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353974612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:01,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:01,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:37:01,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322091902] [2021-06-06 00:37:01,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:37:01,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:01,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:37:01,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:37:01,825 INFO L87 Difference]: Start difference. First operand 51295 states and 198793 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:05,660 INFO L93 Difference]: Finished difference Result 88709 states and 330422 transitions. [2021-06-06 00:37:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:37:05,660 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:37:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:05,886 INFO L225 Difference]: With dead ends: 88709 [2021-06-06 00:37:05,886 INFO L226 Difference]: Without dead ends: 88679 [2021-06-06 00:37:05,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 2757.8ms TimeCoverageRelationStatistics Valid=694, Invalid=4276, Unknown=0, NotChecked=0, Total=4970 [2021-06-06 00:37:05,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88679 states. [2021-06-06 00:37:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88679 to 51308. [2021-06-06 00:37:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51308 states, 51307 states have (on average 3.8756504960336797) internal successors, (198848), 51307 states have internal predecessors, (198848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:07,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51308 states to 51308 states and 198848 transitions. [2021-06-06 00:37:07,474 INFO L78 Accepts]: Start accepts. Automaton has 51308 states and 198848 transitions. Word has length 30 [2021-06-06 00:37:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:07,474 INFO L482 AbstractCegarLoop]: Abstraction has 51308 states and 198848 transitions. [2021-06-06 00:37:07,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:07,474 INFO L276 IsEmpty]: Start isEmpty. Operand 51308 states and 198848 transitions. [2021-06-06 00:37:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:37:07,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:07,558 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:07,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:07,759 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:07,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:07,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1077811610, now seen corresponding path program 209 times [2021-06-06 00:37:07,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:07,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282484338] [2021-06-06 00:37:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:07,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:07,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282484338] [2021-06-06 00:37:07,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282484338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:07,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574233396] [2021-06-06 00:37:07,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:07,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:37:07,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:37:07,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:37:07,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:08,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:37:08,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:08,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:08,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:08,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:08,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:37:08,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-06 00:37:08,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:37:08,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:37:08,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:37:08,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:5 [2021-06-06 00:37:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:08,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574233396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:08,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:08,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:37:08,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675192405] [2021-06-06 00:37:08,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:37:08,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:08,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:37:08,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:37:08,494 INFO L87 Difference]: Start difference. First operand 51308 states and 198848 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:11,475 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-06 00:37:13,445 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-06-06 00:37:14,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:14,024 INFO L93 Difference]: Finished difference Result 100753 states and 371531 transitions. [2021-06-06 00:37:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:37:14,025 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:37:14,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:14,308 INFO L225 Difference]: With dead ends: 100753 [2021-06-06 00:37:14,309 INFO L226 Difference]: Without dead ends: 100723 [2021-06-06 00:37:14,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 4070.1ms TimeCoverageRelationStatistics Valid=829, Invalid=4721, Unknown=0, NotChecked=0, Total=5550 [2021-06-06 00:37:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100723 states. [2021-06-06 00:37:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100723 to 51325. [2021-06-06 00:37:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51325 states, 51324 states have (on average 3.875944977008807) internal successors, (198929), 51324 states have internal predecessors, (198929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51325 states to 51325 states and 198929 transitions. [2021-06-06 00:37:16,131 INFO L78 Accepts]: Start accepts. Automaton has 51325 states and 198929 transitions. Word has length 30 [2021-06-06 00:37:16,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:16,131 INFO L482 AbstractCegarLoop]: Abstraction has 51325 states and 198929 transitions. [2021-06-06 00:37:16,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:16,131 INFO L276 IsEmpty]: Start isEmpty. Operand 51325 states and 198929 transitions. [2021-06-06 00:37:16,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:37:16,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:16,210 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:16,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-06 00:37:16,410 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:16,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:16,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1599622906, now seen corresponding path program 210 times [2021-06-06 00:37:16,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:16,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159412665] [2021-06-06 00:37:16,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:16,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:16,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159412665] [2021-06-06 00:37:16,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159412665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:16,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411837830] [2021-06-06 00:37:16,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:16,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:37:16,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:37:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-06 00:37:16,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:16,908 INFO L354 Elim1Store]: treesize reduction 16, result has 82.0 percent of original size [2021-06-06 00:37:16,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 131 [2021-06-06 00:37:17,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:37:17,639 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 93 [2021-06-06 00:37:17,640 INFO L628 ElimStorePlain]: treesize reduction 561, result has 33.1 percent of original size [2021-06-06 00:37:17,822 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2021-06-06 00:37:17,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:37:17,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:129, output treesize:1483 [2021-06-06 00:37:18,812 WARN L205 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 100 [2021-06-06 00:37:19,104 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-06-06 00:37:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:19,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411837830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:19,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:19,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-06 00:37:19,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334837837] [2021-06-06 00:37:19,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:37:19,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:37:19,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:37:19,321 INFO L87 Difference]: Start difference. First operand 51325 states and 198929 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:21,496 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 128 [2021-06-06 00:37:25,790 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 104 [2021-06-06 00:37:26,485 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-06 00:37:26,918 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 131 [2021-06-06 00:37:27,161 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 69 [2021-06-06 00:37:27,468 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 96 [2021-06-06 00:37:27,883 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 117 [2021-06-06 00:37:28,403 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 127 [2021-06-06 00:37:28,969 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 116 [2021-06-06 00:37:29,339 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 68 [2021-06-06 00:37:29,610 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 79 [2021-06-06 00:37:29,912 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 61 [2021-06-06 00:37:30,264 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 88 [2021-06-06 00:37:30,581 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 93 [2021-06-06 00:37:31,020 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 80 [2021-06-06 00:37:31,489 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 87 [2021-06-06 00:37:31,969 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 93 [2021-06-06 00:37:32,532 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 99 [2021-06-06 00:37:33,060 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 100 [2021-06-06 00:37:33,568 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 100 [2021-06-06 00:37:33,908 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 99 [2021-06-06 00:37:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:34,004 INFO L93 Difference]: Finished difference Result 98216 states and 365043 transitions. [2021-06-06 00:37:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-06 00:37:34,004 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:37:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:34,272 INFO L225 Difference]: With dead ends: 98216 [2021-06-06 00:37:34,272 INFO L226 Difference]: Without dead ends: 98186 [2021-06-06 00:37:34,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3727 ImplicationChecksByTransitivity, 13341.7ms TimeCoverageRelationStatistics Valid=1403, Invalid=9939, Unknown=0, NotChecked=0, Total=11342 [2021-06-06 00:37:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98186 states. [2021-06-06 00:37:36,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98186 to 51329. [2021-06-06 00:37:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51329 states, 51328 states have (on average 3.8760325748129674) internal successors, (198949), 51328 states have internal predecessors, (198949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51329 states to 51329 states and 198949 transitions. [2021-06-06 00:37:36,286 INFO L78 Accepts]: Start accepts. Automaton has 51329 states and 198949 transitions. Word has length 30 [2021-06-06 00:37:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:36,286 INFO L482 AbstractCegarLoop]: Abstraction has 51329 states and 198949 transitions. [2021-06-06 00:37:36,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 51329 states and 198949 transitions. [2021-06-06 00:37:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:37:36,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:36,375 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:36,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:36,589 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:36,589 INFO L82 PathProgramCache]: Analyzing trace with hash -647796388, now seen corresponding path program 211 times [2021-06-06 00:37:36,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:36,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291920015] [2021-06-06 00:37:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:36,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:36,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291920015] [2021-06-06 00:37:36,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291920015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:36,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414041794] [2021-06-06 00:37:36,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:36,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:37:36,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:37,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:37,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:37,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:37,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:37,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:37,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:37,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:37:37,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:37:37,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 41 [2021-06-06 00:37:37,117 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:37:37,129 INFO L628 ElimStorePlain]: treesize reduction 21, result has 47.5 percent of original size [2021-06-06 00:37:37,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:37:37,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:19 [2021-06-06 00:37:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:37,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414041794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:37,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:37,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-06 00:37:37,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109347328] [2021-06-06 00:37:37,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:37:37,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:37,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:37:37,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:37:37,187 INFO L87 Difference]: Start difference. First operand 51329 states and 198949 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:38,036 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-06-06 00:37:38,513 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-06 00:37:39,036 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-06 00:37:39,970 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-06 00:37:41,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:41,287 INFO L93 Difference]: Finished difference Result 75448 states and 283001 transitions. [2021-06-06 00:37:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-06 00:37:41,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:37:41,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:41,478 INFO L225 Difference]: With dead ends: 75448 [2021-06-06 00:37:41,479 INFO L226 Difference]: Without dead ends: 75418 [2021-06-06 00:37:41,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 3329.0ms TimeCoverageRelationStatistics Valid=599, Invalid=3183, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:37:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75418 states. [2021-06-06 00:37:42,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75418 to 51341. [2021-06-06 00:37:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51341 states, 51340 states have (on average 3.8762173743669655) internal successors, (199005), 51340 states have internal predecessors, (199005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:43,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51341 states to 51341 states and 199005 transitions. [2021-06-06 00:37:43,084 INFO L78 Accepts]: Start accepts. Automaton has 51341 states and 199005 transitions. Word has length 30 [2021-06-06 00:37:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:43,084 INFO L482 AbstractCegarLoop]: Abstraction has 51341 states and 199005 transitions. [2021-06-06 00:37:43,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 51341 states and 199005 transitions. [2021-06-06 00:37:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:37:43,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:43,165 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:43,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-06-06 00:37:43,365 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1412477524, now seen corresponding path program 212 times [2021-06-06 00:37:43,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:43,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879706725] [2021-06-06 00:37:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:43,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:43,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879706725] [2021-06-06 00:37:43,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879706725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:43,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432824219] [2021-06-06 00:37:43,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:43,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:37:43,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:37:43,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:37:43,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:43,825 INFO L354 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2021-06-06 00:37:43,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 78 [2021-06-06 00:37:43,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:37:43,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:37:43,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:37:43,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:132, output treesize:5 [2021-06-06 00:37:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:43,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432824219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:43,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:43,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:37:43,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826561209] [2021-06-06 00:37:43,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:37:43,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:43,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:37:43,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:37:43,849 INFO L87 Difference]: Start difference. First operand 51341 states and 199005 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:45,613 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-06 00:37:48,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:48,755 INFO L93 Difference]: Finished difference Result 89359 states and 332380 transitions. [2021-06-06 00:37:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:37:48,755 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:37:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:48,983 INFO L225 Difference]: With dead ends: 89359 [2021-06-06 00:37:48,983 INFO L226 Difference]: Without dead ends: 89329 [2021-06-06 00:37:48,984 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 3355.5ms TimeCoverageRelationStatistics Valid=736, Invalid=4964, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:37:49,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89329 states. [2021-06-06 00:37:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89329 to 51356. [2021-06-06 00:37:50,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51356 states, 51355 states have (on average 3.8760977509492744) internal successors, (199057), 51355 states have internal predecessors, (199057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51356 states to 51356 states and 199057 transitions. [2021-06-06 00:37:50,501 INFO L78 Accepts]: Start accepts. Automaton has 51356 states and 199057 transitions. Word has length 30 [2021-06-06 00:37:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:50,501 INFO L482 AbstractCegarLoop]: Abstraction has 51356 states and 199057 transitions. [2021-06-06 00:37:50,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 51356 states and 199057 transitions. [2021-06-06 00:37:50,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:37:50,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:50,583 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:50,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:50,786 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:50,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:50,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1672859506, now seen corresponding path program 91 times [2021-06-06 00:37:50,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:50,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610106757] [2021-06-06 00:37:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:51,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:51,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610106757] [2021-06-06 00:37:51,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610106757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:51,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862802381] [2021-06-06 00:37:51,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:51,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:37:51,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:51,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:51,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:51,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:37:51,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:51,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:51,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:37:51,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:37:51,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-06 00:37:51,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:37:51,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:37:51,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:37:51,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:7 [2021-06-06 00:37:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:51,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862802381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:51,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:51,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-06 00:37:51,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424762623] [2021-06-06 00:37:51,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:37:51,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:51,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:37:51,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:37:51,361 INFO L87 Difference]: Start difference. First operand 51356 states and 199057 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:53,498 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2021-06-06 00:37:54,829 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-06 00:37:55,087 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-06 00:37:55,220 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-06 00:37:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:55,869 INFO L93 Difference]: Finished difference Result 65015 states and 244705 transitions. [2021-06-06 00:37:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:37:55,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:37:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:56,053 INFO L225 Difference]: With dead ends: 65015 [2021-06-06 00:37:56,054 INFO L226 Difference]: Without dead ends: 65000 [2021-06-06 00:37:56,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 3659.4ms TimeCoverageRelationStatistics Valid=667, Invalid=3623, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:37:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65000 states. [2021-06-06 00:37:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65000 to 51356. [2021-06-06 00:37:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51356 states, 51355 states have (on average 3.8760977509492744) internal successors, (199057), 51355 states have internal predecessors, (199057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51356 states to 51356 states and 199057 transitions. [2021-06-06 00:37:57,340 INFO L78 Accepts]: Start accepts. Automaton has 51356 states and 199057 transitions. Word has length 30 [2021-06-06 00:37:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:57,340 INFO L482 AbstractCegarLoop]: Abstraction has 51356 states and 199057 transitions. [2021-06-06 00:37:57,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 51356 states and 199057 transitions. [2021-06-06 00:37:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:37:57,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:57,418 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:57,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:57,618 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:57,618 INFO L82 PathProgramCache]: Analyzing trace with hash -266679050, now seen corresponding path program 92 times [2021-06-06 00:37:57,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:57,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840481252] [2021-06-06 00:37:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:57,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:57,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840481252] [2021-06-06 00:37:57,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840481252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:57,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877725259] [2021-06-06 00:37:57,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:57,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:37:57,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:37:57,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-06 00:37:57,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:58,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:58,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:58,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:58,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:58,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:37:58,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:37:58,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:37:58,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:37:58,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-06-06 00:37:58,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:37:58,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:37:58,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:37:58,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:16 [2021-06-06 00:37:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:58,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877725259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:58,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:58,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:37:58,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194800178] [2021-06-06 00:37:58,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:37:58,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:58,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:37:58,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:37:58,226 INFO L87 Difference]: Start difference. First operand 51356 states and 199057 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,667 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-06-06 00:38:00,201 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-06 00:38:01,362 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-06 00:38:01,497 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-06 00:38:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:02,358 INFO L93 Difference]: Finished difference Result 65322 states and 245610 transitions. [2021-06-06 00:38:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-06 00:38:02,358 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:38:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:02,544 INFO L225 Difference]: With dead ends: 65322 [2021-06-06 00:38:02,544 INFO L226 Difference]: Without dead ends: 65292 [2021-06-06 00:38:02,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 3271.1ms TimeCoverageRelationStatistics Valid=705, Invalid=3585, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:38:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65292 states. [2021-06-06 00:38:03,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65292 to 51363. [2021-06-06 00:38:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51363 states, 51362 states have (on average 3.876211985514583) internal successors, (199090), 51362 states have internal predecessors, (199090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51363 states to 51363 states and 199090 transitions. [2021-06-06 00:38:03,856 INFO L78 Accepts]: Start accepts. Automaton has 51363 states and 199090 transitions. Word has length 30 [2021-06-06 00:38:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:03,856 INFO L482 AbstractCegarLoop]: Abstraction has 51363 states and 199090 transitions. [2021-06-06 00:38:03,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 51363 states and 199090 transitions. [2021-06-06 00:38:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:38:03,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:03,939 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:04,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable681 [2021-06-06 00:38:04,140 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:04,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:04,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1242997894, now seen corresponding path program 93 times [2021-06-06 00:38:04,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:04,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643420405] [2021-06-06 00:38:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:04,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:04,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643420405] [2021-06-06 00:38:04,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643420405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:04,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024052527] [2021-06-06 00:38:04,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:04,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:38:04,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:04,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-06 00:38:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:04,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:04,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:04,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:04,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:04,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:04,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:04,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:04,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:04,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:38:04,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 75 [2021-06-06 00:38:04,717 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:38:04,735 INFO L628 ElimStorePlain]: treesize reduction 23, result has 58.2 percent of original size [2021-06-06 00:38:04,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:38:04,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:46 [2021-06-06 00:38:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:04,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024052527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:04,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:04,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-06 00:38:04,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704283409] [2021-06-06 00:38:04,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:38:04,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:04,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:38:04,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:38:04,798 INFO L87 Difference]: Start difference. First operand 51363 states and 199090 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:05,422 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-06-06 00:38:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:09,272 INFO L93 Difference]: Finished difference Result 52142 states and 201228 transitions. [2021-06-06 00:38:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:38:09,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:38:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:09,411 INFO L225 Difference]: With dead ends: 52142 [2021-06-06 00:38:09,411 INFO L226 Difference]: Without dead ends: 52127 [2021-06-06 00:38:09,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 3261.8ms TimeCoverageRelationStatistics Valid=643, Invalid=4907, Unknown=0, NotChecked=0, Total=5550 [2021-06-06 00:38:09,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52127 states. [2021-06-06 00:38:10,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52127 to 51368. [2021-06-06 00:38:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51368 states, 51367 states have (on average 3.876107228376195) internal successors, (199104), 51367 states have internal predecessors, (199104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51368 states to 51368 states and 199104 transitions. [2021-06-06 00:38:10,646 INFO L78 Accepts]: Start accepts. Automaton has 51368 states and 199104 transitions. Word has length 30 [2021-06-06 00:38:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:10,646 INFO L482 AbstractCegarLoop]: Abstraction has 51368 states and 199104 transitions. [2021-06-06 00:38:10,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 51368 states and 199104 transitions. [2021-06-06 00:38:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:38:10,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:10,728 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:10,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:10,929 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:10,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:10,929 INFO L82 PathProgramCache]: Analyzing trace with hash 319742902, now seen corresponding path program 213 times [2021-06-06 00:38:10,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:10,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422673689] [2021-06-06 00:38:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:11,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:11,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422673689] [2021-06-06 00:38:11,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422673689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:11,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975892296] [2021-06-06 00:38:11,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:11,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:38:11,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:11,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-06 00:38:11,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:11,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:11,363 INFO L354 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2021-06-06 00:38:11,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 132 treesize of output 116 [2021-06-06 00:38:11,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:38:11,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:38:11,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:38:11,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:140, output treesize:37 [2021-06-06 00:38:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:11,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975892296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:11,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:11,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:38:11,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217338407] [2021-06-06 00:38:11,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:38:11,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:11,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:38:11,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:38:11,435 INFO L87 Difference]: Start difference. First operand 51368 states and 199104 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:12,890 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-06 00:38:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:14,367 INFO L93 Difference]: Finished difference Result 96060 states and 356274 transitions. [2021-06-06 00:38:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:38:14,368 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:38:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:14,621 INFO L225 Difference]: With dead ends: 96060 [2021-06-06 00:38:14,621 INFO L226 Difference]: Without dead ends: 96030 [2021-06-06 00:38:14,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1971.6ms TimeCoverageRelationStatistics Valid=427, Invalid=3113, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:38:14,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96030 states. [2021-06-06 00:38:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96030 to 51366. [2021-06-06 00:38:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51366 states, 51365 states have (on average 3.8760439988318893) internal successors, (199093), 51365 states have internal predecessors, (199093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51366 states to 51366 states and 199093 transitions. [2021-06-06 00:38:16,439 INFO L78 Accepts]: Start accepts. Automaton has 51366 states and 199093 transitions. Word has length 30 [2021-06-06 00:38:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:16,439 INFO L482 AbstractCegarLoop]: Abstraction has 51366 states and 199093 transitions. [2021-06-06 00:38:16,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 51366 states and 199093 transitions. [2021-06-06 00:38:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:38:16,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:16,528 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:16,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:16,728 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1522055270, now seen corresponding path program 214 times [2021-06-06 00:38:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:16,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862080685] [2021-06-06 00:38:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:16,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:16,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862080685] [2021-06-06 00:38:16,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862080685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:16,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059463409] [2021-06-06 00:38:16,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:16,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:38:16,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:16,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:38:16,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:17,159 INFO L354 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2021-06-06 00:38:17,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 78 [2021-06-06 00:38:17,161 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:38:17,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:38:17,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:38:17,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:132, output treesize:5 [2021-06-06 00:38:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:17,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059463409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:17,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:17,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:38:17,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250217795] [2021-06-06 00:38:17,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:38:17,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:17,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:38:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:38:17,185 INFO L87 Difference]: Start difference. First operand 51366 states and 199093 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:18,883 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-06 00:38:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:22,025 INFO L93 Difference]: Finished difference Result 96170 states and 356770 transitions. [2021-06-06 00:38:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-06 00:38:22,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:38:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:22,300 INFO L225 Difference]: With dead ends: 96170 [2021-06-06 00:38:22,300 INFO L226 Difference]: Without dead ends: 96110 [2021-06-06 00:38:22,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 3485.8ms TimeCoverageRelationStatistics Valid=997, Invalid=6313, Unknown=0, NotChecked=0, Total=7310 [2021-06-06 00:38:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96110 states. [2021-06-06 00:38:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96110 to 51441. [2021-06-06 00:38:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51441 states, 51440 states have (on average 3.877293934681182) internal successors, (199448), 51440 states have internal predecessors, (199448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51441 states to 51441 states and 199448 transitions. [2021-06-06 00:38:23,934 INFO L78 Accepts]: Start accepts. Automaton has 51441 states and 199448 transitions. Word has length 30 [2021-06-06 00:38:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:23,935 INFO L482 AbstractCegarLoop]: Abstraction has 51441 states and 199448 transitions. [2021-06-06 00:38:23,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 51441 states and 199448 transitions. [2021-06-06 00:38:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:38:24,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:24,017 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:24,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:24,217 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:24,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:24,218 INFO L82 PathProgramCache]: Analyzing trace with hash -939263374, now seen corresponding path program 215 times [2021-06-06 00:38:24,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:24,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534225243] [2021-06-06 00:38:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:24,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:24,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534225243] [2021-06-06 00:38:24,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534225243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:24,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613379458] [2021-06-06 00:38:24,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:24,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:38:24,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:24,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:38:24,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:24,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:24,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:24,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:24,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:24,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:38:24,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 43 [2021-06-06 00:38:24,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:38:24,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:38:24,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:38:24,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-06 00:38:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:24,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613379458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:24,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:24,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:38:24,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442178712] [2021-06-06 00:38:24,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:38:24,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:24,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:38:24,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:38:24,682 INFO L87 Difference]: Start difference. First operand 51441 states and 199448 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:24,999 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-06 00:38:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:30,156 INFO L93 Difference]: Finished difference Result 98045 states and 363673 transitions. [2021-06-06 00:38:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-06 00:38:30,156 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:38:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:30,428 INFO L225 Difference]: With dead ends: 98045 [2021-06-06 00:38:30,428 INFO L226 Difference]: Without dead ends: 97985 [2021-06-06 00:38:30,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 3715.5ms TimeCoverageRelationStatistics Valid=1077, Invalid=6063, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:38:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97985 states. [2021-06-06 00:38:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97985 to 51457. [2021-06-06 00:38:31,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51457 states, 51456 states have (on average 3.8776819029850746) internal successors, (199530), 51456 states have internal predecessors, (199530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51457 states to 51457 states and 199530 transitions. [2021-06-06 00:38:32,130 INFO L78 Accepts]: Start accepts. Automaton has 51457 states and 199530 transitions. Word has length 30 [2021-06-06 00:38:32,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:32,130 INFO L482 AbstractCegarLoop]: Abstraction has 51457 states and 199530 transitions. [2021-06-06 00:38:32,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand 51457 states and 199530 transitions. [2021-06-06 00:38:32,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:38:32,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:32,213 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:32,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-06-06 00:38:32,426 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:32,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:32,427 INFO L82 PathProgramCache]: Analyzing trace with hash -298347338, now seen corresponding path program 216 times [2021-06-06 00:38:32,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:32,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700701841] [2021-06-06 00:38:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:32,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:32,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700701841] [2021-06-06 00:38:32,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700701841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:32,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901488686] [2021-06-06 00:38:32,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:32,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:38:32,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:32,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-06 00:38:32,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:32,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:32,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:32,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:32,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:38:32,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 87 [2021-06-06 00:38:32,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:38:32,952 INFO L628 ElimStorePlain]: treesize reduction 283, result has 8.7 percent of original size [2021-06-06 00:38:32,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:38:32,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:27 [2021-06-06 00:38:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:33,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901488686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:33,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:33,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:38:33,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533407831] [2021-06-06 00:38:33,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:38:33,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:33,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:38:33,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:38:33,020 INFO L87 Difference]: Start difference. First operand 51457 states and 199530 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:34,432 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-06 00:38:36,901 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-06 00:38:37,355 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-06 00:38:37,857 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-06 00:38:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:39,022 INFO L93 Difference]: Finished difference Result 88720 states and 330726 transitions. [2021-06-06 00:38:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-06 00:38:39,023 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:38:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:39,280 INFO L225 Difference]: With dead ends: 88720 [2021-06-06 00:38:39,281 INFO L226 Difference]: Without dead ends: 88705 [2021-06-06 00:38:39,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2686 ImplicationChecksByTransitivity, 4392.9ms TimeCoverageRelationStatistics Valid=917, Invalid=7455, Unknown=0, NotChecked=0, Total=8372 [2021-06-06 00:38:39,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88705 states. [2021-06-06 00:38:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88705 to 51452. [2021-06-06 00:38:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51452 states, 51451 states have (on average 3.8778449398456782) internal successors, (199519), 51451 states have internal predecessors, (199519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51452 states to 51452 states and 199519 transitions. [2021-06-06 00:38:40,860 INFO L78 Accepts]: Start accepts. Automaton has 51452 states and 199519 transitions. Word has length 30 [2021-06-06 00:38:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:40,860 INFO L482 AbstractCegarLoop]: Abstraction has 51452 states and 199519 transitions. [2021-06-06 00:38:40,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 51452 states and 199519 transitions. [2021-06-06 00:38:41,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:38:41,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:41,179 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:41,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-06-06 00:38:41,379 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:41,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1664696114, now seen corresponding path program 217 times [2021-06-06 00:38:41,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:41,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833593159] [2021-06-06 00:38:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:41,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:41,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833593159] [2021-06-06 00:38:41,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833593159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:41,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949500609] [2021-06-06 00:38:41,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:38:41,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:41,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:41,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:41,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:41,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:38:41,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:41,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:38:41,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-06 00:38:41,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:38:41,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:38:41,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:38:41,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-06 00:38:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:41,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949500609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:41,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:41,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:38:41,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680001935] [2021-06-06 00:38:41,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:38:41,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:41,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:38:41,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:38:41,836 INFO L87 Difference]: Start difference. First operand 51452 states and 199519 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:46,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:46,821 INFO L93 Difference]: Finished difference Result 96185 states and 357201 transitions. [2021-06-06 00:38:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-06 00:38:46,822 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:38:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:47,277 INFO L225 Difference]: With dead ends: 96185 [2021-06-06 00:38:47,278 INFO L226 Difference]: Without dead ends: 96140 [2021-06-06 00:38:47,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 3598.0ms TimeCoverageRelationStatistics Valid=972, Invalid=6000, Unknown=0, NotChecked=0, Total=6972 [2021-06-06 00:38:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96140 states. [2021-06-06 00:38:48,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96140 to 51498. [2021-06-06 00:38:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51498 states, 51497 states have (on average 3.878633706817873) internal successors, (199738), 51497 states have internal predecessors, (199738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51498 states to 51498 states and 199738 transitions. [2021-06-06 00:38:48,894 INFO L78 Accepts]: Start accepts. Automaton has 51498 states and 199738 transitions. Word has length 30 [2021-06-06 00:38:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:48,894 INFO L482 AbstractCegarLoop]: Abstraction has 51498 states and 199738 transitions. [2021-06-06 00:38:48,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 51498 states and 199738 transitions. [2021-06-06 00:38:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:38:48,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:48,967 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:49,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:49,168 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:49,168 INFO L82 PathProgramCache]: Analyzing trace with hash -796622530, now seen corresponding path program 218 times [2021-06-06 00:38:49,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:49,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380137288] [2021-06-06 00:38:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:49,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:49,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380137288] [2021-06-06 00:38:49,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380137288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:49,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475401966] [2021-06-06 00:38:49,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:49,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:38:49,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:49,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:38:49,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:49,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:49,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:49,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:49,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:49,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:38:49,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 43 [2021-06-06 00:38:49,572 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:38:49,587 INFO L628 ElimStorePlain]: treesize reduction 19, result has 51.3 percent of original size [2021-06-06 00:38:49,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:38:49,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-06 00:38:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:49,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475401966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:49,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:49,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:38:49,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120657774] [2021-06-06 00:38:49,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:38:49,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:49,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:38:49,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:38:49,635 INFO L87 Difference]: Start difference. First operand 51498 states and 199738 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:50,974 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-06 00:38:52,629 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-06 00:38:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:55,369 INFO L93 Difference]: Finished difference Result 99308 states and 368805 transitions. [2021-06-06 00:38:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-06 00:38:55,369 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:38:55,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:55,673 INFO L225 Difference]: With dead ends: 99308 [2021-06-06 00:38:55,673 INFO L226 Difference]: Without dead ends: 99263 [2021-06-06 00:38:55,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 4283.8ms TimeCoverageRelationStatistics Valid=1207, Invalid=6625, Unknown=0, NotChecked=0, Total=7832 [2021-06-06 00:38:55,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99263 states. [2021-06-06 00:38:57,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99263 to 51487. [2021-06-06 00:38:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51487 states, 51486 states have (on average 3.8783358582915746) internal successors, (199680), 51486 states have internal predecessors, (199680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51487 states to 51487 states and 199680 transitions. [2021-06-06 00:38:57,620 INFO L78 Accepts]: Start accepts. Automaton has 51487 states and 199680 transitions. Word has length 30 [2021-06-06 00:38:57,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:57,620 INFO L482 AbstractCegarLoop]: Abstraction has 51487 states and 199680 transitions. [2021-06-06 00:38:57,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:57,620 INFO L276 IsEmpty]: Start isEmpty. Operand 51487 states and 199680 transitions. [2021-06-06 00:38:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:38:57,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:57,713 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:57,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-06-06 00:38:57,913 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:57,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1365074840, now seen corresponding path program 219 times [2021-06-06 00:38:57,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:57,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247453753] [2021-06-06 00:38:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:58,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:58,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247453753] [2021-06-06 00:38:58,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247453753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:58,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983196272] [2021-06-06 00:38:58,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:58,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:38:58,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:58,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-06 00:38:58,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:58,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:38:58,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:38:58,531 INFO L354 Elim1Store]: treesize reduction 37, result has 49.3 percent of original size [2021-06-06 00:38:58,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 57 treesize of output 76 [2021-06-06 00:38:58,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:38:58,607 INFO L628 ElimStorePlain]: treesize reduction 27, result has 79.4 percent of original size [2021-06-06 00:38:58,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:38:58,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:75, output treesize:41 [2021-06-06 00:38:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:58,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983196272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:58,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:58,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-06 00:38:58,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447451452] [2021-06-06 00:38:58,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-06 00:38:58,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:58,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-06 00:38:58,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:38:58,655 INFO L87 Difference]: Start difference. First operand 51487 states and 199680 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,723 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-06 00:39:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:05,609 INFO L93 Difference]: Finished difference Result 89476 states and 333969 transitions. [2021-06-06 00:39:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-06 00:39:05,609 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:39:05,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:05,847 INFO L225 Difference]: With dead ends: 89476 [2021-06-06 00:39:05,847 INFO L226 Difference]: Without dead ends: 89446 [2021-06-06 00:39:05,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 4893.7ms TimeCoverageRelationStatistics Valid=941, Invalid=6891, Unknown=0, NotChecked=0, Total=7832 [2021-06-06 00:39:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89446 states. [2021-06-06 00:39:07,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89446 to 51484. [2021-06-06 00:39:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51484 states, 51483 states have (on average 3.8783481926072683) internal successors, (199669), 51483 states have internal predecessors, (199669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51484 states to 51484 states and 199669 transitions. [2021-06-06 00:39:07,430 INFO L78 Accepts]: Start accepts. Automaton has 51484 states and 199669 transitions. Word has length 30 [2021-06-06 00:39:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:07,430 INFO L482 AbstractCegarLoop]: Abstraction has 51484 states and 199669 transitions. [2021-06-06 00:39:07,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 51484 states and 199669 transitions. [2021-06-06 00:39:07,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:39:07,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:07,762 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:07,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable726,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:07,963 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:07,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:07,963 INFO L82 PathProgramCache]: Analyzing trace with hash 558156888, now seen corresponding path program 220 times [2021-06-06 00:39:07,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:07,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598308285] [2021-06-06 00:39:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:08,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:08,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598308285] [2021-06-06 00:39:08,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598308285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:08,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18080546] [2021-06-06 00:39:08,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:08,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:08,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:08,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:39:08,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:08,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:39:08,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:39:08,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:39:08,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:39:08,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:39:08,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 43 [2021-06-06 00:39:08,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-06 00:39:08,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:39:08,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:39:08,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-06 00:39:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:08,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18080546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:08,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:08,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:39:08,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299903457] [2021-06-06 00:39:08,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:39:08,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:08,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:39:08,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:39:08,456 INFO L87 Difference]: Start difference. First operand 51484 states and 199669 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:13,938 INFO L93 Difference]: Finished difference Result 92747 states and 347437 transitions. [2021-06-06 00:39:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:39:13,938 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:39:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:14,312 INFO L225 Difference]: With dead ends: 92747 [2021-06-06 00:39:14,313 INFO L226 Difference]: Without dead ends: 92687 [2021-06-06 00:39:14,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 4109.1ms TimeCoverageRelationStatistics Valid=1085, Invalid=5887, Unknown=0, NotChecked=0, Total=6972 [2021-06-06 00:39:14,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92687 states. Received shutdown request... [2021-06-06 00:39:14,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-06 00:39:14,855 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-06 00:39:14,856 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:39:14,857 WARN L196 ceAbstractionStarter]: Timeout [2021-06-06 00:39:14,858 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:39:14 BasicIcfg [2021-06-06 00:39:14,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:39:14,858 INFO L168 Benchmark]: Toolchain (without parser) took 801802.93 ms. Allocated memory was 358.6 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 338.5 MB in the beginning and 10.8 GB in the end (delta: -10.5 GB). Peak memory consumption was 5.6 GB. Max. memory is 16.0 GB. [2021-06-06 00:39:14,858 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 358.6 MB. Free memory was 339.7 MB in the beginning and 339.7 MB in the end (delta: 71.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:39:14,858 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.10 ms. Allocated memory is still 358.6 MB. Free memory was 338.5 MB in the beginning and 337.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:39:14,858 INFO L168 Benchmark]: Boogie Preprocessor took 14.76 ms. Allocated memory is still 358.6 MB. Free memory was 337.1 MB in the beginning and 336.1 MB in the end (delta: 999.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:39:14,858 INFO L168 Benchmark]: RCFGBuilder took 216.97 ms. Allocated memory is still 358.6 MB. Free memory was 336.0 MB in the beginning and 323.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-06 00:39:14,858 INFO L168 Benchmark]: TraceAbstraction took 801549.41 ms. Allocated memory was 358.6 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 322.9 MB in the beginning and 10.8 GB in the end (delta: -10.5 GB). Peak memory consumption was 5.6 GB. Max. memory is 16.0 GB. [2021-06-06 00:39:14,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 358.6 MB. Free memory was 339.7 MB in the beginning and 339.7 MB in the end (delta: 71.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.10 ms. Allocated memory is still 358.6 MB. Free memory was 338.5 MB in the beginning and 337.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.76 ms. Allocated memory is still 358.6 MB. Free memory was 337.1 MB in the beginning and 336.1 MB in the end (delta: 999.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 216.97 ms. Allocated memory is still 358.6 MB. Free memory was 336.0 MB in the beginning and 323.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 801549.41 ms. Allocated memory was 358.6 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 322.9 MB in the beginning and 10.8 GB in the end (delta: -10.5 GB). Peak memory consumption was 5.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 801491.7ms, OverallIterations: 315, TraceHistogramMax: 3, EmptinessCheckTime: 10205.4ms, AutomataDifference: 464864.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16274 SDtfs, 89111 SDslu, 142176 SDs, 0 SdLazy, 243011 SolverSat, 15803 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 110622.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21414 GetRequests, 6600 SyntacticMatches, 389 SemanticMatches, 14425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263839 ImplicationChecksByTransitivity, 319648.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55780occurred in iteration=259, InterpolantAutomatonStates: 12645, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 168388.3ms AutomataMinimizationTime, 315 MinimizatonAttempts, 2880455 StatesRemovedByMinimization, 313 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 978.8ms SsaConstructionTime, 2755.1ms SatisfiabilityAnalysisTime, 84478.0ms InterpolantComputationTime, 17098 NumberOfCodeBlocks, 17098 NumberOfCodeBlocksAsserted, 1097 NumberOfCheckSat, 16470 ConstructedInterpolants, 405 QuantifiedInterpolants, 209984 SizeOfPredicates, 1544 NumberOfNonLiveVariables, 22264 ConjunctsInSsa, 5742 ConjunctsInUnsatCore, 628 InterpolantComputations, 2 PerfectInterpolantSequences, 1056/5913 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown