/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-Separate.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-dev-29289db [2021-06-05 16:56:34,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:56:34,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:56:34,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:56:34,105 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-Separate.epf [2021-06-05 16:56:34,139 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:56:34,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:56:34,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:56:34,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:56:34,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:56:34,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:56:34,142 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:56:34,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:56:34,143 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:56:34,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:56:34,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:56:34,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:56:34,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:56:34,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:56:34,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:56:34,145 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:56:34,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:56:34,145 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:56:34,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:56:34,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:56:34,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:56:34,146 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:56:34,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:56:34,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:56:34,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:56:34,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:56:34,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:56:34,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:56:34,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:56:34,147 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:56:34,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:56:34,147 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:56:34,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:56:34,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:56:34,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:56:34,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:56:34,483 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:56:34,485 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:56:34,485 INFO L432 ainManager$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 [2021-06-05 16:56:34,485 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' [2021-06-05 16:56:34,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:56:34,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:56:34,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:56:34,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:56:34,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:56:34,536 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 05.06 04:56:34" (1/1) ... [2021-06-05 16:56:34,543 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 05.06 04:56:34" (1/1) ... [2021-06-05 16:56:34,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:56:34,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:56:34,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:56:34,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:56:34,558 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 05.06 04:56:34" (1/1) ... [2021-06-05 16:56:34,559 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 05.06 04:56:34" (1/1) ... [2021-06-05 16:56:34,560 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 05.06 04:56:34" (1/1) ... [2021-06-05 16:56:34,561 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 05.06 04:56:34" (1/1) ... [2021-06-05 16:56:34,564 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 05.06 04:56:34" (1/1) ... [2021-06-05 16:56:34,568 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 05.06 04:56:34" (1/1) ... [2021-06-05 16:56:34,569 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 05.06 04:56:34" (1/1) ... [2021-06-05 16:56:34,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:56:34,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:56:34,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:56:34,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:56:34,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:56:34" (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 [2021-06-05 16:56:34,650 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:56:34,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:56:34,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:56:34,650 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:56:34,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:56:34,651 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:56:34,651 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:56:34,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:56:34,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:56:34,652 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:56:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:56:34,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:56:34,653 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:56:34,869 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:56:34,869 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:56:34,871 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:56:34 BoogieIcfgContainer [2021-06-05 16:56:34,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:56:34,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:56:34,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:56:34,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:56:34,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:56:34" (1/2) ... [2021-06-05 16:56:34,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b650bb and model type sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:56:34, skipping insertion in model container [2021-06-05 16:56:34,902 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 05.06 04:56:34" (2/2) ... [2021-06-05 16:56:34,903 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-array-hom.wvr.bpl [2021-06-05 16:56:34,907 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:56:34,908 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:56:34,908 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:56:34,908 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:56:34,952 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:56:34,985 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:56:35,010 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:56:35,011 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:56:35,011 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:56:35,011 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:56:35,011 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:56:35,011 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:56:35,011 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:56:35,011 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:56:35,026 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 16:56:35,054 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) [2021-06-05 16:56:35,056 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) [2021-06-05 16:56:35,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:56:35,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:35,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:35,069 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:35,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:35,075 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-06-05 16:56:35,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:35,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900353278] [2021-06-05 16:56:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:35,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:35,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900353278] [2021-06-05 16:56:35,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900353278] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:56:35,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:56:35,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:56:35,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918679803] [2021-06-05 16:56:35,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:56:35,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:35,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:56:35,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:56:35,292 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) [2021-06-05 16:56:35,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:35,370 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-06-05 16:56:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:56:35,372 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 [2021-06-05 16:56:35,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:35,385 INFO L225 Difference]: With dead ends: 154 [2021-06-05 16:56:35,385 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 16:56:35,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:56:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 16:56:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-06-05 16:56:35,447 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) [2021-06-05 16:56:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 16:56:35,452 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-06-05 16:56:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:35,453 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 16:56:35,453 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) [2021-06-05 16:56:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 16:56:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:56:35,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:35,457 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:35,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:56:35,457 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:35,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:35,461 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-06-05 16:56:35,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:35,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866006475] [2021-06-05 16:56:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:35,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:35,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866006475] [2021-06-05 16:56:35,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866006475] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:56:35,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:56:35,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:56:35,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030765278] [2021-06-05 16:56:35,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:56:35,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:35,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:56:35,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:56:35,535 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) [2021-06-05 16:56:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:35,573 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-06-05 16:56:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:56:35,573 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 [2021-06-05 16:56:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:35,576 INFO L225 Difference]: With dead ends: 158 [2021-06-05 16:56:35,576 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 16:56:35,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:56:35,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 16:56:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-06-05 16:56:35,598 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) [2021-06-05 16:56:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 16:56:35,599 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 16:56:35,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:35,599 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 16:56:35,599 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) [2021-06-05 16:56:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 16:56:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:56:35,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:35,607 INFO L521 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] [2021-06-05 16:56:35,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:56:35,607 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:35,608 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-06-05 16:56:35,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:35,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795245734] [2021-06-05 16:56:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:36,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:36,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795245734] [2021-06-05 16:56:36,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795245734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:36,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676951920] [2021-06-05 16:56:36,048 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 [2021-06-05 16:56:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:36,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:56:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:36,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:56:36,320 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 [2021-06-05 16:56:36,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:36,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:36,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:36,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-05 16:56:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:36,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676951920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:36,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:36,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:56:36,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864842469] [2021-06-05 16:56:36,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:56:36,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:36,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:56:36,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:56:36,385 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) [2021-06-05 16:56:36,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:36,599 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 16:56:36,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:56:36,600 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 [2021-06-05 16:56:36,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:36,602 INFO L225 Difference]: With dead ends: 330 [2021-06-05 16:56:36,603 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 16:56:36,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:56:36,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 16:56:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 16:56:36,620 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) [2021-06-05 16:56:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 16:56:36,623 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 16:56:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:36,623 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 16:56:36,624 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) [2021-06-05 16:56:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 16:56:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:56:36,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:36,625 INFO L521 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] [2021-06-05 16:56:36,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 16:56:36,841 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:36,841 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-06-05 16:56:36,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:36,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081658090] [2021-06-05 16:56:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:37,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:37,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081658090] [2021-06-05 16:56:37,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081658090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:37,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266735837] [2021-06-05 16:56:37,082 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 [2021-06-05 16:56:37,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:37,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:37,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:56:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:37,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:37,283 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 [2021-06-05 16:56:37,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:56:37,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:37,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:37,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-06-05 16:56:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:37,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266735837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:37,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:37,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 16:56:37,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775444768] [2021-06-05 16:56:37,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:37,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:37,408 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) [2021-06-05 16:56:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:37,820 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 16:56:37,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:56:37,821 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 [2021-06-05 16:56:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:37,823 INFO L225 Difference]: With dead ends: 374 [2021-06-05 16:56:37,823 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 16:56:37,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 458.9ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:56:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 16:56:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 16:56:37,830 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) [2021-06-05 16:56:37,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 16:56:37,831 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 16:56:37,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:37,831 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 16:56:37,831 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) [2021-06-05 16:56:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 16:56:37,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:56:37,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:37,832 INFO L521 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] [2021-06-05 16:56:38,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:38,033 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:38,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:38,033 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-06-05 16:56:38,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:38,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473745557] [2021-06-05 16:56:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:38,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:38,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473745557] [2021-06-05 16:56:38,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473745557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:38,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450558272] [2021-06-05 16:56:38,186 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:38,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:56:38,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:38,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:56:38,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:38,329 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 [2021-06-05 16:56:38,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:38,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:38,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:38,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-05 16:56:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:38,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450558272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:38,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:38,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:56:38,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906966256] [2021-06-05 16:56:38,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:56:38,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:38,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:56:38,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:56:38,368 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) [2021-06-05 16:56:38,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:38,533 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-05 16:56:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:56:38,534 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 [2021-06-05 16:56:38,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:38,536 INFO L225 Difference]: With dead ends: 296 [2021-06-05 16:56:38,536 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 16:56:38,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:56:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 16:56:38,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-05 16:56:38,543 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) [2021-06-05 16:56:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 16:56:38,544 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 16:56:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:38,544 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 16:56:38,544 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) [2021-06-05 16:56:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 16:56:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:56:38,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:38,546 INFO L521 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] [2021-06-05 16:56:38,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:38,768 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-06-05 16:56:38,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:38,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418233362] [2021-06-05 16:56:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:38,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:38,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418233362] [2021-06-05 16:56:38,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418233362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:38,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952376643] [2021-06-05 16:56:38,951 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 [2021-06-05 16:56:38,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:38,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:38,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:56:38,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:39,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:39,095 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 [2021-06-05 16:56:39,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:56:39,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:39,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:39,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2021-06-05 16:56:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:39,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952376643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:39,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:39,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:56:39,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974891102] [2021-06-05 16:56:39,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:56:39,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:39,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:56:39,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:56:39,180 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) [2021-06-05 16:56:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:39,417 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 16:56:39,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:56:39,417 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 [2021-06-05 16:56:39,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:39,425 INFO L225 Difference]: With dead ends: 425 [2021-06-05 16:56:39,425 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 16:56:39,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:56:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 16:56:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 16:56:39,433 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) [2021-06-05 16:56:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 16:56:39,434 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 16:56:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:39,434 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 16:56:39,435 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) [2021-06-05 16:56:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 16:56:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:39,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:39,436 INFO L521 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] [2021-06-05 16:56:39,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:39,650 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:39,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-06-05 16:56:39,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:39,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222179088] [2021-06-05 16:56:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:39,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:39,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222179088] [2021-06-05 16:56:39,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222179088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:39,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052182703] [2021-06-05 16:56:39,705 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 [2021-06-05 16:56:39,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:56:39,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:39,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052182703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:39,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:39,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:56:39,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394345103] [2021-06-05 16:56:39,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:56:39,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:39,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:56:39,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:56:39,841 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) [2021-06-05 16:56:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:40,252 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 16:56:40,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:56:40,252 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 [2021-06-05 16:56:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:40,255 INFO L225 Difference]: With dead ends: 619 [2021-06-05 16:56:40,255 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 16:56:40,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:56:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 16:56:40,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 16:56:40,265 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) [2021-06-05 16:56:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 16:56:40,266 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 16:56:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:40,266 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 16:56:40,266 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) [2021-06-05 16:56:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 16:56:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:40,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:40,268 INFO L521 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] [2021-06-05 16:56:40,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 16:56:40,481 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:40,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:40,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-06-05 16:56:40,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:40,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631526719] [2021-06-05 16:56:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:40,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:40,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631526719] [2021-06-05 16:56:40,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631526719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:40,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344004826] [2021-06-05 16:56:40,556 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 [2021-06-05 16:56:40,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:56:40,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:40,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:40,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:40,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344004826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:40,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:40,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:56:40,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114762826] [2021-06-05 16:56:40,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:40,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:40,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:40,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:40,697 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) [2021-06-05 16:56:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:41,484 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 16:56:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:56:41,485 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 [2021-06-05 16:56:41,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:41,489 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 16:56:41,489 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 16:56:41,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:56:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 16:56:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 16:56:41,504 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) [2021-06-05 16:56:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 16:56:41,505 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 16:56:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:41,505 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 16:56:41,505 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) [2021-06-05 16:56:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 16:56:41,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:41,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:41,506 INFO L521 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] [2021-06-05 16:56:41,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:41,729 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:41,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:41,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-06-05 16:56:41,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:41,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536489918] [2021-06-05 16:56:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:41,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:41,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536489918] [2021-06-05 16:56:41,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536489918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:41,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543819817] [2021-06-05 16:56:41,777 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 [2021-06-05 16:56:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:41,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:41,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:41,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543819817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:41,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:41,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:56:41,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279888398] [2021-06-05 16:56:41,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:41,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:41,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:41,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:41,928 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) [2021-06-05 16:56:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:42,621 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 16:56:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:56:42,622 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 [2021-06-05 16:56:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:42,626 INFO L225 Difference]: With dead ends: 951 [2021-06-05 16:56:42,626 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 16:56:42,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:56:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 16:56:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 16:56:42,640 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) [2021-06-05 16:56:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 16:56:42,641 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 16:56:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:42,641 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 16:56:42,641 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) [2021-06-05 16:56:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 16:56:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:42,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:42,642 INFO L521 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] [2021-06-05 16:56:42,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:42,857 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:42,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-06-05 16:56:42,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:42,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091630083] [2021-06-05 16:56:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:42,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:42,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091630083] [2021-06-05 16:56:42,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091630083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:42,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664311549] [2021-06-05 16:56:42,887 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 [2021-06-05 16:56:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:42,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:56:42,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:42,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664311549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:42,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:42,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:56:42,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011808991] [2021-06-05 16:56:42,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:56:42,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:42,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:56:42,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:56:42,986 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) [2021-06-05 16:56:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:43,114 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 16:56:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:56:43,114 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 [2021-06-05 16:56:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:43,117 INFO L225 Difference]: With dead ends: 669 [2021-06-05 16:56:43,117 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 16:56:43,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 16:56:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 16:56:43,130 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) [2021-06-05 16:56:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 16:56:43,132 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 16:56:43,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:43,132 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 16:56:43,132 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) [2021-06-05 16:56:43,133 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 16:56:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:43,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:43,134 INFO L521 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] [2021-06-05 16:56:43,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 16:56:43,356 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:43,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:43,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-06-05 16:56:43,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:43,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381092745] [2021-06-05 16:56:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:43,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:43,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381092745] [2021-06-05 16:56:43,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381092745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:43,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646940999] [2021-06-05 16:56:43,414 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 [2021-06-05 16:56:43,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:43,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:43,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:43,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:43,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646940999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:43,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:43,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:56:43,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400219162] [2021-06-05 16:56:43,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:43,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:43,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:43,541 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) [2021-06-05 16:56:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:43,748 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 16:56:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:56:43,749 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 [2021-06-05 16:56:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:43,752 INFO L225 Difference]: With dead ends: 710 [2021-06-05 16:56:43,752 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 16:56:43,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:56:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 16:56:43,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 16:56:43,765 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) [2021-06-05 16:56:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 16:56:43,767 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 16:56:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:43,767 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 16:56:43,767 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) [2021-06-05 16:56:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 16:56:43,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:43,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:43,769 INFO L521 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] [2021-06-05 16:56:43,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 16:56:43,992 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:43,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-06-05 16:56:43,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:43,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385675099] [2021-06-05 16:56:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:44,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:44,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385675099] [2021-06-05 16:56:44,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385675099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:44,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465811070] [2021-06-05 16:56:44,023 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 [2021-06-05 16:56:44,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:44,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:44,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:56:44,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:44,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465811070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:44,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:44,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:56:44,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943151297] [2021-06-05 16:56:44,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:56:44,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:44,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:56:44,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:56:44,124 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) [2021-06-05 16:56:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:44,232 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 16:56:44,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:56:44,233 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 [2021-06-05 16:56:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:44,237 INFO L225 Difference]: With dead ends: 830 [2021-06-05 16:56:44,237 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 16:56:44,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 16:56:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 16:56:44,252 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) [2021-06-05 16:56:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 16:56:44,254 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 16:56:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:44,254 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 16:56:44,255 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) [2021-06-05 16:56:44,255 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 16:56:44,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:44,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:44,256 INFO L521 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] [2021-06-05 16:56:44,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 16:56:44,477 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:44,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:44,477 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-06-05 16:56:44,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:44,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990885539] [2021-06-05 16:56:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:44,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:44,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990885539] [2021-06-05 16:56:44,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990885539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:44,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029197113] [2021-06-05 16:56:44,533 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 [2021-06-05 16:56:44,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:56:44,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:44,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:44,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:44,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029197113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:44,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:44,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:56:44,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346746036] [2021-06-05 16:56:44,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:56:44,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:44,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:56:44,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:56:44,648 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) [2021-06-05 16:56:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:44,917 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 16:56:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:56:44,917 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 [2021-06-05 16:56:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:44,922 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 16:56:44,922 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 16:56:44,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:56:44,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 16:56:44,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 16:56:44,942 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) [2021-06-05 16:56:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 16:56:44,944 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 16:56:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:44,944 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 16:56:44,944 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) [2021-06-05 16:56:44,944 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 16:56:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:44,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:44,946 INFO L521 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] [2021-06-05 16:56:45,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 16:56:45,161 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-06-05 16:56:45,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:45,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335672162] [2021-06-05 16:56:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:45,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:45,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335672162] [2021-06-05 16:56:45,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335672162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:45,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176017407] [2021-06-05 16:56:45,203 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 [2021-06-05 16:56:45,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:45,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:45,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176017407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:45,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:45,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:56:45,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606257462] [2021-06-05 16:56:45,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:56:45,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:45,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:56:45,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:56:45,329 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) [2021-06-05 16:56:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:45,759 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 16:56:45,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:56:45,760 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 [2021-06-05 16:56:45,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:45,766 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 16:56:45,766 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 16:56:45,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:56:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 16:56:45,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 16:56:45,788 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) [2021-06-05 16:56:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 16:56:45,790 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 16:56:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:45,790 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 16:56:45,790 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) [2021-06-05 16:56:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 16:56:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:45,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:45,792 INFO L521 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] [2021-06-05 16:56:46,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 16:56:46,015 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:46,015 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-06-05 16:56:46,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:46,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66289509] [2021-06-05 16:56:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:46,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:46,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66289509] [2021-06-05 16:56:46,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66289509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:46,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112957856] [2021-06-05 16:56:46,055 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 [2021-06-05 16:56:46,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:46,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:46,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:46,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:46,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112957856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:46,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:46,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:56:46,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180849107] [2021-06-05 16:56:46,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:46,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:46,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:46,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:46,172 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) [2021-06-05 16:56:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:46,415 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 16:56:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:56:46,416 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 [2021-06-05 16:56:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:46,420 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 16:56:46,420 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 16:56:46,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:56:46,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 16:56:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 16:56:46,440 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) [2021-06-05 16:56:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 16:56:46,442 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 16:56:46,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:46,443 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 16:56:46,443 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) [2021-06-05 16:56:46,443 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 16:56:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:46,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:46,445 INFO L521 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] [2021-06-05 16:56:46,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:46,667 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-06-05 16:56:46,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:46,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467895854] [2021-06-05 16:56:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:46,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:46,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467895854] [2021-06-05 16:56:46,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467895854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:46,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239383543] [2021-06-05 16:56:46,711 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 [2021-06-05 16:56:46,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:56:46,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:46,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:46,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:46,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239383543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:46,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:46,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:56:46,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881455523] [2021-06-05 16:56:46,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:46,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:46,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:46,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:46,833 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) [2021-06-05 16:56:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:47,109 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 16:56:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:56:47,109 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 [2021-06-05 16:56:47,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:47,113 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 16:56:47,113 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 16:56:47,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:56:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 16:56:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 16:56:47,132 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) [2021-06-05 16:56:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 16:56:47,134 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 16:56:47,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:47,134 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 16:56:47,135 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) [2021-06-05 16:56:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 16:56:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:47,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:47,136 INFO L521 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] [2021-06-05 16:56:47,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:47,359 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:47,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-06-05 16:56:47,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:47,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338103486] [2021-06-05 16:56:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:47,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:47,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338103486] [2021-06-05 16:56:47,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338103486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:47,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337246737] [2021-06-05 16:56:47,401 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 [2021-06-05 16:56:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:47,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:47,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:47,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337246737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:47,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:47,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:56:47,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297161077] [2021-06-05 16:56:47,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:56:47,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:47,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:56:47,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:56:47,503 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) [2021-06-05 16:56:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:47,869 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 16:56:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:56:47,870 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 [2021-06-05 16:56:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:47,876 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 16:56:47,876 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 16:56:47,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:56:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 16:56:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 16:56:47,898 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) [2021-06-05 16:56:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 16:56:47,900 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 16:56:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:47,900 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 16:56:47,901 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) [2021-06-05 16:56:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 16:56:47,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:47,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:47,903 INFO L521 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] [2021-06-05 16:56:48,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 16:56:48,125 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:48,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-06-05 16:56:48,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:48,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955280786] [2021-06-05 16:56:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:48,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:48,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955280786] [2021-06-05 16:56:48,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955280786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:48,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768611830] [2021-06-05 16:56:48,164 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 [2021-06-05 16:56:48,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:48,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:48,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768611830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:48,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:48,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:56:48,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026631770] [2021-06-05 16:56:48,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:48,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:48,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:48,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:48,343 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) [2021-06-05 16:56:49,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:49,082 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 16:56:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:56:49,093 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 [2021-06-05 16:56:49,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:49,105 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 16:56:49,105 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 16:56:49,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:56:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 16:56:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 16:56:49,139 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) [2021-06-05 16:56:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 16:56:49,141 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 16:56:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:49,141 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 16:56:49,142 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) [2021-06-05 16:56:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 16:56:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:49,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:49,144 INFO L521 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] [2021-06-05 16:56:49,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:49,357 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:49,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-06-05 16:56:49,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:49,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101674149] [2021-06-05 16:56:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:49,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:49,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101674149] [2021-06-05 16:56:49,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101674149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:49,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660264729] [2021-06-05 16:56:49,409 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 [2021-06-05 16:56:49,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:56:49,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:49,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:49,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660264729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:49,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:49,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:56:49,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286533615] [2021-06-05 16:56:49,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:49,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:49,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:49,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:49,561 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) [2021-06-05 16:56:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:50,274 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 16:56:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:56:50,275 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 [2021-06-05 16:56:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:50,282 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 16:56:50,282 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 16:56:50,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:56:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 16:56:50,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 16:56:50,320 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) [2021-06-05 16:56:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 16:56:50,323 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 16:56:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:50,323 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 16:56:50,323 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) [2021-06-05 16:56:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 16:56:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:50,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:50,325 INFO L521 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] [2021-06-05 16:56:50,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 16:56:50,534 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:50,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:50,535 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-06-05 16:56:50,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:50,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430729980] [2021-06-05 16:56:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:50,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:50,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430729980] [2021-06-05 16:56:50,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430729980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:50,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944423546] [2021-06-05 16:56:50,576 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 [2021-06-05 16:56:50,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:50,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:50,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:50,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:50,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944423546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:50,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:50,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:56:50,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861479910] [2021-06-05 16:56:50,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:56:50,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:50,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:56:50,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:56:50,689 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) [2021-06-05 16:56:51,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:51,388 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 16:56:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:56:51,388 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 [2021-06-05 16:56:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:51,400 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 16:56:51,400 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 16:56:51,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:56:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 16:56:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 16:56:51,433 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) [2021-06-05 16:56:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 16:56:51,435 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 16:56:51,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:51,435 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 16:56:51,436 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) [2021-06-05 16:56:51,436 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 16:56:51,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:51,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:51,438 INFO L521 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] [2021-06-05 16:56:51,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 16:56:51,660 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:51,661 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-06-05 16:56:51,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:51,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110564641] [2021-06-05 16:56:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:51,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:51,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110564641] [2021-06-05 16:56:51,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110564641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:51,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307307093] [2021-06-05 16:56:51,703 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 [2021-06-05 16:56:51,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:56:51,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:51,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:51,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:51,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307307093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:51,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:51,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:56:51,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043527320] [2021-06-05 16:56:51,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:56:51,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:51,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:56:51,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:56:51,807 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) [2021-06-05 16:56:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:52,391 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 16:56:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:56:52,392 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 [2021-06-05 16:56:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:52,396 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 16:56:52,396 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 16:56:52,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:56:52,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 16:56:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 16:56:52,426 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) [2021-06-05 16:56:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 16:56:52,429 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 16:56:52,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:52,429 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 16:56:52,429 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) [2021-06-05 16:56:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 16:56:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:52,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:52,431 INFO L521 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] [2021-06-05 16:56:52,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 16:56:52,652 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:52,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-06-05 16:56:52,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:52,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980789138] [2021-06-05 16:56:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:52,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:52,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980789138] [2021-06-05 16:56:52,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980789138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:52,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705867246] [2021-06-05 16:56:52,695 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 [2021-06-05 16:56:52,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:56:52,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:52,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:52,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:52,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705867246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:52,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:52,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:56:52,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288308518] [2021-06-05 16:56:52,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:52,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:52,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:52,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:52,804 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) [2021-06-05 16:56:53,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:53,445 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 16:56:53,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:56:53,446 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 [2021-06-05 16:56:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:53,453 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 16:56:53,453 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 16:56:53,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:56:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 16:56:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 16:56:53,489 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) [2021-06-05 16:56:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 16:56:53,491 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 16:56:53,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:53,492 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 16:56:53,492 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) [2021-06-05 16:56:53,492 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 16:56:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:53,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:53,494 INFO L521 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] [2021-06-05 16:56:53,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 16:56:53,710 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:53,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:53,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-06-05 16:56:53,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:53,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599164865] [2021-06-05 16:56:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:53,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:53,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599164865] [2021-06-05 16:56:53,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599164865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:53,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314227056] [2021-06-05 16:56:53,753 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 [2021-06-05 16:56:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:53,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:53,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314227056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:53,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:53,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:56:53,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424396759] [2021-06-05 16:56:53,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:53,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:53,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:53,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:53,893 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) [2021-06-05 16:56:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:54,607 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 16:56:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:56:54,608 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 [2021-06-05 16:56:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:54,613 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 16:56:54,613 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 16:56:54,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:56:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 16:56:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 16:56:54,641 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) [2021-06-05 16:56:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 16:56:54,643 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 16:56:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:54,643 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 16:56:54,643 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) [2021-06-05 16:56:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 16:56:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:54,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:54,646 INFO L521 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] [2021-06-05 16:56:54,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 16:56:54,861 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-06-05 16:56:54,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:54,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853301826] [2021-06-05 16:56:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:54,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:54,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853301826] [2021-06-05 16:56:54,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853301826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:54,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68167527] [2021-06-05 16:56:54,889 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 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 [2021-06-05 16:56:54,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:56:54,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:54,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:56:54,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:54,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68167527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:54,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:54,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:56:54,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879401814] [2021-06-05 16:56:54,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:56:54,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:54,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:56:54,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:56:54,983 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) [2021-06-05 16:56:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:55,066 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 16:56:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:56:55,067 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 [2021-06-05 16:56:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:55,068 INFO L225 Difference]: With dead ends: 929 [2021-06-05 16:56:55,068 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 16:56:55,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:56:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 16:56:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 16:56:55,081 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) [2021-06-05 16:56:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 16:56:55,083 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 16:56:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:55,083 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 16:56:55,083 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) [2021-06-05 16:56:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 16:56:55,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:55,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:55,085 INFO L521 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] [2021-06-05 16:56:55,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:55,301 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:55,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-06-05 16:56:55,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:55,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699431916] [2021-06-05 16:56:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:55,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:55,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699431916] [2021-06-05 16:56:55,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699431916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:55,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244356134] [2021-06-05 16:56:55,340 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 [2021-06-05 16:56:55,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:55,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:55,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:55,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:55,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244356134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:55,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:55,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:56:55,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089229526] [2021-06-05 16:56:55,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:56:55,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:55,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:56:55,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:56:55,412 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) [2021-06-05 16:56:55,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:55,697 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 16:56:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:56:55,697 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 [2021-06-05 16:56:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:55,700 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 16:56:55,700 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 16:56:55,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:56:55,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 16:56:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 16:56:55,719 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) [2021-06-05 16:56:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 16:56:55,722 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 16:56:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:55,722 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 16:56:55,722 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) [2021-06-05 16:56:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 16:56:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:55,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:55,724 INFO L521 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] [2021-06-05 16:56:55,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 16:56:55,940 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:55,940 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-06-05 16:56:55,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:55,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224695575] [2021-06-05 16:56:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:55,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:55,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224695575] [2021-06-05 16:56:55,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224695575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:55,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159526630] [2021-06-05 16:56:55,974 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 [2021-06-05 16:56:56,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:56:56,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:56,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:56,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:56,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159526630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:56,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:56,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:56:56,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186582651] [2021-06-05 16:56:56,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:56:56,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:56,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:56:56,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:56:56,070 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) [2021-06-05 16:56:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:56,302 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 16:56:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:56:56,303 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 [2021-06-05 16:56:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:56,305 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 16:56:56,305 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 16:56:56,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:56:56,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 16:56:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 16:56:56,322 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) [2021-06-05 16:56:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 16:56:56,324 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 16:56:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:56,325 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 16:56:56,325 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) [2021-06-05 16:56:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 16:56:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:56,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:56,327 INFO L521 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] [2021-06-05 16:56:56,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:56,541 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:56,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:56,541 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-06-05 16:56:56,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:56,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030368521] [2021-06-05 16:56:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:56,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:56,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030368521] [2021-06-05 16:56:56,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030368521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:56,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638093146] [2021-06-05 16:56:56,571 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 [2021-06-05 16:56:56,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:56,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:56,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:56,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:56,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638093146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:56,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:56,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:56:56,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154889157] [2021-06-05 16:56:56,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:56:56,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:56,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:56:56,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:56:56,641 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) [2021-06-05 16:56:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:56,834 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 16:56:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:56:56,834 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 [2021-06-05 16:56:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:56,836 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 16:56:56,836 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 16:56:56,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:56:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 16:56:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 16:56:56,849 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) [2021-06-05 16:56:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 16:56:56,852 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 16:56:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:56,852 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 16:56:56,852 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) [2021-06-05 16:56:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 16:56:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:56,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:56,855 INFO L521 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] [2021-06-05 16:56:57,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 16:56:57,069 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-06-05 16:56:57,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:57,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474674117] [2021-06-05 16:56:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:57,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:57,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474674117] [2021-06-05 16:56:57,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474674117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:57,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368723188] [2021-06-05 16:56:57,106 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 [2021-06-05 16:56:57,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:56:57,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:57,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:57,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368723188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:57,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:57,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:56:57,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152684858] [2021-06-05 16:56:57,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:56:57,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:57,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:56:57,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:56:57,174 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) [2021-06-05 16:56:57,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:57,400 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 16:56:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:56:57,401 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 [2021-06-05 16:56:57,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:57,403 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 16:56:57,403 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 16:56:57,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:56:57,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 16:56:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 16:56:57,422 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) [2021-06-05 16:56:57,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 16:56:57,425 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 16:56:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:57,425 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 16:56:57,425 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) [2021-06-05 16:56:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 16:56:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:57,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:57,428 INFO L521 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] [2021-06-05 16:56:57,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:57,648 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-06-05 16:56:57,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:57,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000649856] [2021-06-05 16:56:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:57,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:57,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000649856] [2021-06-05 16:56:57,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000649856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:57,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141227159] [2021-06-05 16:56:57,684 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 [2021-06-05 16:56:57,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:56:57,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:57,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:57,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:57,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141227159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:57,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:57,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:56:57,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086304240] [2021-06-05 16:56:57,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:57,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:57,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:57,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:57,783 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) [2021-06-05 16:56:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:58,269 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 16:56:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:56:58,269 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 [2021-06-05 16:56:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:58,273 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 16:56:58,273 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 16:56:58,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:56:58,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 16:56:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 16:56:58,298 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) [2021-06-05 16:56:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 16:56:58,300 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 16:56:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:58,301 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 16:56:58,301 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) [2021-06-05 16:56:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 16:56:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:58,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:58,303 INFO L521 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] [2021-06-05 16:56:58,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 16:56:58,517 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:58,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-06-05 16:56:58,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:58,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729916132] [2021-06-05 16:56:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:58,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:58,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729916132] [2021-06-05 16:56:58,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729916132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:58,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699949542] [2021-06-05 16:56:58,554 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 [2021-06-05 16:56:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:58,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:58,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:58,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699949542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:58,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:58,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:56:58,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028603272] [2021-06-05 16:56:58,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:58,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:58,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:58,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:58,684 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) [2021-06-05 16:56:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:59,138 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 16:56:59,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:56:59,138 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 [2021-06-05 16:56:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:59,141 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 16:56:59,141 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 16:56:59,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:56:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 16:56:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 16:56:59,160 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) [2021-06-05 16:56:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:56:59,163 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:56:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:59,163 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:56:59,163 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) [2021-06-05 16:56:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:56:59,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:59,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:59,166 INFO L521 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] [2021-06-05 16:56:59,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:59,375 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:59,375 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-06-05 16:56:59,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:59,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232958317] [2021-06-05 16:56:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:59,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:59,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232958317] [2021-06-05 16:56:59,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232958317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:59,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930953743] [2021-06-05 16:56:59,422 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 [2021-06-05 16:56:59,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:59,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:59,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:56:59,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:59,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930953743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:59,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:59,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:56:59,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676082846] [2021-06-05 16:56:59,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:56:59,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:59,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:56:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:56:59,535 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) [2021-06-05 16:56:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:59,937 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 16:56:59,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:56:59,937 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 [2021-06-05 16:56:59,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:59,940 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 16:56:59,940 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 16:56:59,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:56:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 16:56:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 16:56:59,958 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) [2021-06-05 16:56:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:56:59,961 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:56:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:59,961 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:56:59,962 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) [2021-06-05 16:56:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:56:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:56:59,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:59,964 INFO L521 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] [2021-06-05 16:57:00,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 16:57:00,177 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:00,177 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-06-05 16:57:00,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:00,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148688896] [2021-06-05 16:57:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:00,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:00,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148688896] [2021-06-05 16:57:00,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148688896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:00,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468769310] [2021-06-05 16:57:00,213 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 [2021-06-05 16:57:00,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:57:00,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:00,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:00,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:00,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468769310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:00,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:00,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:57:00,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499373125] [2021-06-05 16:57:00,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:57:00,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:00,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:57:00,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:57:00,334 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) [2021-06-05 16:57:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:00,693 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 16:57:00,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:57:00,693 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 [2021-06-05 16:57:00,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:00,696 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 16:57:00,696 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 16:57:00,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:57:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 16:57:00,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 16:57:00,713 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) [2021-06-05 16:57:00,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:57:00,715 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:57:00,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:00,715 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:57:00,715 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) [2021-06-05 16:57:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:57:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:00,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:00,717 INFO L521 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] [2021-06-05 16:57:00,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:00,919 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:00,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:00,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-06-05 16:57:00,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:00,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798714407] [2021-06-05 16:57:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:00,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:00,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798714407] [2021-06-05 16:57:00,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798714407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:00,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322622463] [2021-06-05 16:57:00,964 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 [2021-06-05 16:57:00,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:00,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:00,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:00,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:01,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322622463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:01,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:01,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:01,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953869429] [2021-06-05 16:57:01,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:01,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:01,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:01,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:01,082 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) [2021-06-05 16:57:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:01,430 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 16:57:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:57:01,430 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 [2021-06-05 16:57:01,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:01,432 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 16:57:01,433 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 16:57:01,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 235.9ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 16:57:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 16:57:01,448 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) [2021-06-05 16:57:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:57:01,450 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:57:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:01,450 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:57:01,450 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) [2021-06-05 16:57:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:57:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:01,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:01,453 INFO L521 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] [2021-06-05 16:57:01,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 16:57:01,654 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:01,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-06-05 16:57:01,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:01,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013142368] [2021-06-05 16:57:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:01,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:01,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013142368] [2021-06-05 16:57:01,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013142368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:01,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858604049] [2021-06-05 16:57:01,690 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 [2021-06-05 16:57:01,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:01,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:01,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:01,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858604049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:01,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:01,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:01,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070142048] [2021-06-05 16:57:01,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:01,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:01,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:01,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:01,817 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) [2021-06-05 16:57:02,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:02,187 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 16:57:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:57:02,188 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 [2021-06-05 16:57:02,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:02,190 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 16:57:02,190 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 16:57:02,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:57:02,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 16:57:02,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 16:57:02,212 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) [2021-06-05 16:57:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:57:02,214 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:57:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:02,215 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:57:02,215 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) [2021-06-05 16:57:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:57:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:02,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:02,217 INFO L521 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] [2021-06-05 16:57:02,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 16:57:02,438 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-06-05 16:57:02,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:02,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967624735] [2021-06-05 16:57:02,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:02,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:02,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967624735] [2021-06-05 16:57:02,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967624735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:02,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394396688] [2021-06-05 16:57:02,477 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 [2021-06-05 16:57:02,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:02,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:02,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:02,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:02,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394396688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:02,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:02,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:57:02,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253416266] [2021-06-05 16:57:02,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:57:02,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:02,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:57:02,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:57:02,569 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) [2021-06-05 16:57:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:02,905 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 16:57:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:57:02,906 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 [2021-06-05 16:57:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:02,908 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 16:57:02,908 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 16:57:02,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 16:57:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 16:57:02,923 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) [2021-06-05 16:57:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 16:57:02,925 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 16:57:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:02,925 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 16:57:02,925 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) [2021-06-05 16:57:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 16:57:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:02,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:02,928 INFO L521 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] [2021-06-05 16:57:03,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 16:57:03,150 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:03,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:03,150 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-06-05 16:57:03,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:03,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942885028] [2021-06-05 16:57:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:03,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:03,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942885028] [2021-06-05 16:57:03,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942885028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:03,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46242789] [2021-06-05 16:57:03,185 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 [2021-06-05 16:57:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:03,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:03,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:03,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46242789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:03,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:03,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:57:03,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665656209] [2021-06-05 16:57:03,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:57:03,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:03,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:57:03,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:57:03,283 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) [2021-06-05 16:57:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:03,568 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 16:57:03,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:03,568 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 [2021-06-05 16:57:03,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:03,571 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 16:57:03,571 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 16:57:03,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:57:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 16:57:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 16:57:03,590 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) [2021-06-05 16:57:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 16:57:03,593 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 16:57:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:03,593 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 16:57:03,593 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) [2021-06-05 16:57:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 16:57:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:03,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:03,595 INFO L521 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] [2021-06-05 16:57:03,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 16:57:03,809 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-06-05 16:57:03,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:03,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742818603] [2021-06-05 16:57:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:03,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:03,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742818603] [2021-06-05 16:57:03,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742818603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:03,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478081692] [2021-06-05 16:57:03,841 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 [2021-06-05 16:57:03,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:03,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:03,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:03,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:03,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478081692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:03,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:03,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:57:03,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758300511] [2021-06-05 16:57:03,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:57:03,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:03,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:57:03,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:57:03,924 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) [2021-06-05 16:57:04,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:04,132 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 16:57:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:57:04,133 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 [2021-06-05 16:57:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:04,135 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 16:57:04,135 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 16:57:04,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:57:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 16:57:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 16:57:04,147 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) [2021-06-05 16:57:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 16:57:04,149 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 16:57:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:04,149 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 16:57:04,149 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) [2021-06-05 16:57:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 16:57:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:04,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:04,151 INFO L521 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] [2021-06-05 16:57:04,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:04,360 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:04,361 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-06-05 16:57:04,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:04,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860297731] [2021-06-05 16:57:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:04,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:04,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860297731] [2021-06-05 16:57:04,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860297731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:04,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530999365] [2021-06-05 16:57:04,397 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 [2021-06-05 16:57:04,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:57:04,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:04,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:04,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:04,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530999365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:04,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:04,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:04,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256634906] [2021-06-05 16:57:04,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:04,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:04,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:04,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:04,524 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) [2021-06-05 16:57:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:04,865 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 16:57:04,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:04,866 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 [2021-06-05 16:57:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:04,868 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 16:57:04,868 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 16:57:04,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:57:04,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 16:57:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 16:57:04,883 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) [2021-06-05 16:57:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 16:57:04,885 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 16:57:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:04,886 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 16:57:04,886 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) [2021-06-05 16:57:04,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 16:57:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:04,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:04,888 INFO L521 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] [2021-06-05 16:57:05,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 16:57:05,110 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:05,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-06-05 16:57:05,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:05,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305895092] [2021-06-05 16:57:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:05,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:05,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305895092] [2021-06-05 16:57:05,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305895092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:05,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974409361] [2021-06-05 16:57:05,147 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 [2021-06-05 16:57:05,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:05,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:05,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:05,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:05,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974409361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:05,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:05,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:05,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095157851] [2021-06-05 16:57:05,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:05,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:05,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:05,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:05,239 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) [2021-06-05 16:57:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:05,513 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 16:57:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:57:05,513 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 [2021-06-05 16:57:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:05,515 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 16:57:05,515 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 16:57:05,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:57:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 16:57:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 16:57:05,531 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) [2021-06-05 16:57:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 16:57:05,533 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 16:57:05,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:05,533 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 16:57:05,533 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) [2021-06-05 16:57:05,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 16:57:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:05,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:05,534 INFO L521 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] [2021-06-05 16:57:05,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 16:57:05,735 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:05,735 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-06-05 16:57:05,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:05,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618761390] [2021-06-05 16:57:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:05,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:05,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618761390] [2021-06-05 16:57:05,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618761390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:05,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328356599] [2021-06-05 16:57:05,769 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 [2021-06-05 16:57:05,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:05,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:05,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:05,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:05,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328356599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:05,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:05,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:57:05,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603219364] [2021-06-05 16:57:05,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:57:05,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:05,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:57:05,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:57:05,849 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) [2021-06-05 16:57:06,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:06,000 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 16:57:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:57:06,000 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 [2021-06-05 16:57:06,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:06,002 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 16:57:06,002 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 16:57:06,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:57:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 16:57:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 16:57:06,017 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) [2021-06-05 16:57:06,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 16:57:06,020 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 16:57:06,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:06,020 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 16:57:06,020 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) [2021-06-05 16:57:06,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 16:57:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:06,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:06,022 INFO L521 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] [2021-06-05 16:57:06,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:06,241 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:06,241 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-06-05 16:57:06,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:06,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830785838] [2021-06-05 16:57:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:06,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:06,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830785838] [2021-06-05 16:57:06,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830785838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:06,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774532490] [2021-06-05 16:57:06,534 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) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:06,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:06,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:06,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:57:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:06,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:06,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:06,761 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 [2021-06-05 16:57:06,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:06,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:06,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:06,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:57:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:06,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774532490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:06,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:06,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:57:06,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38299828] [2021-06-05 16:57:06,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:06,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:06,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:06,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:06,786 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) [2021-06-05 16:57:07,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:07,344 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 16:57:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:57:07,344 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 [2021-06-05 16:57:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:07,346 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 16:57:07,346 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 16:57:07,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 640.5ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:57:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 16:57:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 16:57:07,359 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) [2021-06-05 16:57:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 16:57:07,361 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 16:57:07,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:07,361 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 16:57:07,361 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) [2021-06-05 16:57:07,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 16:57:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:07,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:07,362 INFO L521 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] [2021-06-05 16:57:07,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 16:57:07,563 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:07,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:07,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-06-05 16:57:07,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:07,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353840556] [2021-06-05 16:57:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:07,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:07,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353840556] [2021-06-05 16:57:07,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353840556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:07,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196460671] [2021-06-05 16:57:07,799 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 [2021-06-05 16:57:07,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:07,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:57:07,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:08,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:08,008 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 [2021-06-05 16:57:08,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:08,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:08,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:08,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:57:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:08,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196460671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:08,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:08,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:57:08,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754600186] [2021-06-05 16:57:08,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:08,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:08,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:08,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:08,041 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) [2021-06-05 16:57:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:08,551 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-06-05 16:57:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:57:08,551 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 [2021-06-05 16:57:08,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:08,553 INFO L225 Difference]: With dead ends: 1495 [2021-06-05 16:57:08,553 INFO L226 Difference]: Without dead ends: 1480 [2021-06-05 16:57:08,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 572.4ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:57:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-05 16:57:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-06-05 16:57:08,565 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) [2021-06-05 16:57:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 16:57:08,567 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 16:57:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:08,567 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 16:57:08,567 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) [2021-06-05 16:57:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 16:57:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:08,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:08,569 INFO L521 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] [2021-06-05 16:57:08,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:08,770 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:08,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-06-05 16:57:08,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:08,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567106621] [2021-06-05 16:57:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:09,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:09,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567106621] [2021-06-05 16:57:09,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567106621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:09,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071653205] [2021-06-05 16:57:09,172 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 [2021-06-05 16:57:09,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:09,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:09,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:57:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:09,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:09,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:09,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:09,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:09,378 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 [2021-06-05 16:57:09,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:09,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:09,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:09,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:57:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:09,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071653205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:09,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:09,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:57:09,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115781910] [2021-06-05 16:57:09,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:09,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:09,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:09,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:09,407 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) [2021-06-05 16:57:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:11,570 INFO L93 Difference]: Finished difference Result 1658 states and 5345 transitions. [2021-06-05 16:57:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:57:11,571 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 [2021-06-05 16:57:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:11,573 INFO L225 Difference]: With dead ends: 1658 [2021-06-05 16:57:11,573 INFO L226 Difference]: Without dead ends: 1643 [2021-06-05 16:57:11,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 2055.7ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:57:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-06-05 16:57:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1180. [2021-06-05 16:57:11,587 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) [2021-06-05 16:57:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 16:57:11,589 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 16:57:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:11,590 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 16:57:11,590 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) [2021-06-05 16:57:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 16:57:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:11,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:11,592 INFO L521 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] [2021-06-05 16:57:11,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 16:57:11,792 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:11,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:11,793 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-06-05 16:57:11,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:11,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048584416] [2021-06-05 16:57:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:12,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:12,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048584416] [2021-06-05 16:57:12,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048584416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:12,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493005599] [2021-06-05 16:57:12,070 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 [2021-06-05 16:57:12,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:12,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:57:12,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:12,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:12,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:12,293 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 [2021-06-05 16:57:12,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:12,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:12,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:12,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:57:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:12,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493005599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:12,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:12,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:57:12,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287094021] [2021-06-05 16:57:12,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:12,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:12,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:12,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:12,323 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) [2021-06-05 16:57:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:13,186 INFO L93 Difference]: Finished difference Result 1641 states and 5247 transitions. [2021-06-05 16:57:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:57:13,186 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 [2021-06-05 16:57:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:13,188 INFO L225 Difference]: With dead ends: 1641 [2021-06-05 16:57:13,189 INFO L226 Difference]: Without dead ends: 1626 [2021-06-05 16:57:13,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 826.7ms TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:57:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-06-05 16:57:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1189. [2021-06-05 16:57:13,201 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) [2021-06-05 16:57:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-06-05 16:57:13,203 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-06-05 16:57:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:13,203 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-06-05 16:57:13,203 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) [2021-06-05 16:57:13,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-06-05 16:57:13,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:13,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:13,205 INFO L521 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] [2021-06-05 16:57:13,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:13,406 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:13,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:13,406 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-06-05 16:57:13,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:13,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078177891] [2021-06-05 16:57:13,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:13,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:13,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078177891] [2021-06-05 16:57:13,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078177891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:13,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861896274] [2021-06-05 16:57:13,740 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 [2021-06-05 16:57:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:13,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:57:13,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:13,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:13,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:13,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:13,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:13,947 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 [2021-06-05 16:57:13,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:13,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:13,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:13,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:57:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:13,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861896274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:13,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:13,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:57:13,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483016110] [2021-06-05 16:57:13,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:13,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:13,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:13,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:13,977 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) [2021-06-05 16:57:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:15,975 INFO L93 Difference]: Finished difference Result 1880 states and 5988 transitions. [2021-06-05 16:57:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:57:15,976 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 [2021-06-05 16:57:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:15,978 INFO L225 Difference]: With dead ends: 1880 [2021-06-05 16:57:15,978 INFO L226 Difference]: Without dead ends: 1865 [2021-06-05 16:57:15,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1946.5ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:57:15,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-06-05 16:57:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1201. [2021-06-05 16:57:15,992 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) [2021-06-05 16:57:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-06-05 16:57:15,995 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-06-05 16:57:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:15,995 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-06-05 16:57:15,995 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) [2021-06-05 16:57:15,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-06-05 16:57:15,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:15,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:15,997 INFO L521 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] [2021-06-05 16:57:16,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 16:57:16,217 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:16,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:16,217 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-06-05 16:57:16,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:16,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687451314] [2021-06-05 16:57:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:16,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:16,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687451314] [2021-06-05 16:57:16,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687451314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:16,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940941957] [2021-06-05 16:57:16,530 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 [2021-06-05 16:57:16,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:16,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:16,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:57:16,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:16,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:16,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:16,758 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 [2021-06-05 16:57:16,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:57:16,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:16,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:16,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:38 [2021-06-05 16:57:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:16,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940941957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:16,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:16,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 16:57:16,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798145230] [2021-06-05 16:57:16,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:57:16,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:16,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:57:16,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:57:16,872 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) [2021-06-05 16:57:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:18,499 INFO L93 Difference]: Finished difference Result 2084 states and 6623 transitions. [2021-06-05 16:57:18,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:57:18,499 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 [2021-06-05 16:57:18,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:18,502 INFO L225 Difference]: With dead ends: 2084 [2021-06-05 16:57:18,502 INFO L226 Difference]: Without dead ends: 2069 [2021-06-05 16:57:18,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1455.0ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:57:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-05 16:57:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1211. [2021-06-05 16:57:18,533 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) [2021-06-05 16:57:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 4047 transitions. [2021-06-05 16:57:18,536 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 4047 transitions. Word has length 26 [2021-06-05 16:57:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:18,536 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 4047 transitions. [2021-06-05 16:57:18,536 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) [2021-06-05 16:57:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 4047 transitions. [2021-06-05 16:57:18,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:18,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:18,538 INFO L521 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] [2021-06-05 16:57:18,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 16:57:18,760 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:18,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:18,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-06-05 16:57:18,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:18,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276497194] [2021-06-05 16:57:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:19,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:19,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276497194] [2021-06-05 16:57:19,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276497194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:19,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328794127] [2021-06-05 16:57:19,001 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) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:19,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:57:19,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:19,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:19,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:19,243 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 [2021-06-05 16:57:19,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:19,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:19,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:19,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:57:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:19,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328794127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:19,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:19,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:57:19,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297992758] [2021-06-05 16:57:19,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:19,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:19,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:19,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:19,269 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) [2021-06-05 16:57:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:19,928 INFO L93 Difference]: Finished difference Result 1614 states and 5256 transitions. [2021-06-05 16:57:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:57:19,928 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 [2021-06-05 16:57:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:19,930 INFO L225 Difference]: With dead ends: 1614 [2021-06-05 16:57:19,930 INFO L226 Difference]: Without dead ends: 1599 [2021-06-05 16:57:19,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 715.8ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:57:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-06-05 16:57:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1222. [2021-06-05 16:57:19,943 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) [2021-06-05 16:57:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4080 transitions. [2021-06-05 16:57:19,945 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4080 transitions. Word has length 26 [2021-06-05 16:57:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:19,945 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4080 transitions. [2021-06-05 16:57:19,946 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) [2021-06-05 16:57:19,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4080 transitions. [2021-06-05 16:57:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:19,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:19,947 INFO L521 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] [2021-06-05 16:57:20,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 16:57:20,148 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:20,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:20,148 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-06-05 16:57:20,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:20,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498087984] [2021-06-05 16:57:20,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:20,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:20,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498087984] [2021-06-05 16:57:20,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498087984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:20,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286603982] [2021-06-05 16:57:20,410 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 [2021-06-05 16:57:20,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:20,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:20,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:57:20,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:20,641 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:57:20,642 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 [2021-06-05 16:57:20,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:20,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:20,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:20,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:105 [2021-06-05 16:57:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:20,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286603982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:20,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:20,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:57:20,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907113287] [2021-06-05 16:57:20,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:57:20,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:20,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:57:20,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:57:20,808 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) [2021-06-05 16:57:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:22,727 INFO L93 Difference]: Finished difference Result 1877 states and 5972 transitions. [2021-06-05 16:57:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:57:22,727 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 [2021-06-05 16:57:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:22,730 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 16:57:22,730 INFO L226 Difference]: Without dead ends: 1862 [2021-06-05 16:57:22,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1700.7ms TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:57:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-06-05 16:57:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1233. [2021-06-05 16:57:22,746 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) [2021-06-05 16:57:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4128 transitions. [2021-06-05 16:57:22,748 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4128 transitions. Word has length 26 [2021-06-05 16:57:22,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:22,748 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 4128 transitions. [2021-06-05 16:57:22,748 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) [2021-06-05 16:57:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4128 transitions. [2021-06-05 16:57:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:22,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:22,750 INFO L521 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] [2021-06-05 16:57:22,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 16:57:22,950 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:22,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:22,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-06-05 16:57:22,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:22,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811616267] [2021-06-05 16:57:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:23,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:23,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811616267] [2021-06-05 16:57:23,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811616267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:23,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319707209] [2021-06-05 16:57:23,174 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 [2021-06-05 16:57:23,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:57:23,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:23,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:57:23,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:23,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:23,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:23,451 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 [2021-06-05 16:57:23,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:23,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:23,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:23,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 16:57:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:23,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319707209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:23,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:23,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:57:23,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085127684] [2021-06-05 16:57:23,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:23,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:23,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:23,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:23,479 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) [2021-06-05 16:57:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:24,475 INFO L93 Difference]: Finished difference Result 1868 states and 6061 transitions. [2021-06-05 16:57:24,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:57:24,476 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 [2021-06-05 16:57:24,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:24,478 INFO L225 Difference]: With dead ends: 1868 [2021-06-05 16:57:24,479 INFO L226 Difference]: Without dead ends: 1853 [2021-06-05 16:57:24,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 815.8ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:57:24,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-05 16:57:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1242. [2021-06-05 16:57:24,495 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) [2021-06-05 16:57:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4164 transitions. [2021-06-05 16:57:24,497 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4164 transitions. Word has length 26 [2021-06-05 16:57:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:24,497 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4164 transitions. [2021-06-05 16:57:24,497 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) [2021-06-05 16:57:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4164 transitions. [2021-06-05 16:57:24,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:24,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:24,499 INFO L521 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] [2021-06-05 16:57:24,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:24,699 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:24,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:24,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-06-05 16:57:24,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:24,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746773050] [2021-06-05 16:57:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:24,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:24,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746773050] [2021-06-05 16:57:24,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746773050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:24,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428769349] [2021-06-05 16:57:24,887 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 [2021-06-05 16:57:24,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:24,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:24,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:57:24,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:25,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:25,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:25,046 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 [2021-06-05 16:57:25,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:25,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:25,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:25,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:57:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:25,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428769349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:25,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:25,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:57:25,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032506323] [2021-06-05 16:57:25,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:57:25,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:25,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:57:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:57:25,078 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) [2021-06-05 16:57:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:25,421 INFO L93 Difference]: Finished difference Result 1425 states and 4676 transitions. [2021-06-05 16:57:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:57:25,421 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 [2021-06-05 16:57:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:25,423 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 16:57:25,423 INFO L226 Difference]: Without dead ends: 1410 [2021-06-05 16:57:25,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:57:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-06-05 16:57:25,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1238. [2021-06-05 16:57:25,439 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) [2021-06-05 16:57:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4150 transitions. [2021-06-05 16:57:25,441 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4150 transitions. Word has length 26 [2021-06-05 16:57:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:25,442 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4150 transitions. [2021-06-05 16:57:25,442 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) [2021-06-05 16:57:25,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4150 transitions. [2021-06-05 16:57:25,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:25,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:25,444 INFO L521 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] [2021-06-05 16:57:25,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:25,644 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:25,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:25,644 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-06-05 16:57:25,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:25,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201852829] [2021-06-05 16:57:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:25,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:25,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201852829] [2021-06-05 16:57:25,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201852829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:25,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560510753] [2021-06-05 16:57:25,874 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 [2021-06-05 16:57:25,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:25,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:25,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:57:25,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:26,084 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:57:26,084 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 [2021-06-05 16:57:26,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:26,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:26,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:26,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-06-05 16:57:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:26,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560510753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:26,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:26,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:57:26,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792743566] [2021-06-05 16:57:26,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:57:26,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:57:26,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:57:26,155 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) [2021-06-05 16:57:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:27,568 INFO L93 Difference]: Finished difference Result 2068 states and 6701 transitions. [2021-06-05 16:57:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:57:27,569 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 [2021-06-05 16:57:27,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:27,572 INFO L225 Difference]: With dead ends: 2068 [2021-06-05 16:57:27,572 INFO L226 Difference]: Without dead ends: 2053 [2021-06-05 16:57:27,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1214.0ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:57:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-05 16:57:27,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1241. [2021-06-05 16:57:27,590 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) [2021-06-05 16:57:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4165 transitions. [2021-06-05 16:57:27,592 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4165 transitions. Word has length 26 [2021-06-05 16:57:27,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:27,592 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4165 transitions. [2021-06-05 16:57:27,593 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) [2021-06-05 16:57:27,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4165 transitions. [2021-06-05 16:57:27,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:27,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:27,594 INFO L521 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] [2021-06-05 16:57:27,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 16:57:27,795 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:27,795 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-06-05 16:57:27,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:27,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634075012] [2021-06-05 16:57:27,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:28,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:28,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634075012] [2021-06-05 16:57:28,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634075012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:28,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041198437] [2021-06-05 16:57:28,025 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 [2021-06-05 16:57:28,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:28,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:28,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:57:28,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:28,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:28,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:28,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:28,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:28,200 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 [2021-06-05 16:57:28,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:57:28,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:28,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:28,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-06-05 16:57:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:28,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041198437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:28,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:28,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:57:28,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916415453] [2021-06-05 16:57:28,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:28,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:28,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:28,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:28,262 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) [2021-06-05 16:57:29,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:29,559 INFO L93 Difference]: Finished difference Result 1837 states and 5986 transitions. [2021-06-05 16:57:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:57:29,559 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 [2021-06-05 16:57:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:29,562 INFO L225 Difference]: With dead ends: 1837 [2021-06-05 16:57:29,562 INFO L226 Difference]: Without dead ends: 1822 [2021-06-05 16:57:29,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1166.3ms TimeCoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:57:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-06-05 16:57:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1244. [2021-06-05 16:57:29,579 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) [2021-06-05 16:57:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4177 transitions. [2021-06-05 16:57:29,582 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4177 transitions. Word has length 26 [2021-06-05 16:57:29,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:29,582 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4177 transitions. [2021-06-05 16:57:29,582 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) [2021-06-05 16:57:29,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4177 transitions. [2021-06-05 16:57:29,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:29,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:29,584 INFO L521 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] [2021-06-05 16:57:29,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 16:57:29,784 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:29,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:29,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1212092298, now seen corresponding path program 13 times [2021-06-05 16:57:29,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:29,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909305020] [2021-06-05 16:57:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:30,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:30,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909305020] [2021-06-05 16:57:30,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909305020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:30,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575498107] [2021-06-05 16:57:30,034 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 [2021-06-05 16:57:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:30,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:57:30,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:30,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:30,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:30,220 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 [2021-06-05 16:57:30,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:30,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:30,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:30,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:57:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:30,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575498107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:30,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:30,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:57:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427215458] [2021-06-05 16:57:30,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:30,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:30,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:30,254 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) [2021-06-05 16:57:31,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:31,112 INFO L93 Difference]: Finished difference Result 1881 states and 6019 transitions. [2021-06-05 16:57:31,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:57:31,112 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 [2021-06-05 16:57:31,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:31,115 INFO L225 Difference]: With dead ends: 1881 [2021-06-05 16:57:31,115 INFO L226 Difference]: Without dead ends: 1866 [2021-06-05 16:57:31,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 788.9ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:57:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-05 16:57:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1246. [2021-06-05 16:57:31,138 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) [2021-06-05 16:57:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-06-05 16:57:31,141 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-06-05 16:57:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:31,142 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-06-05 16:57:31,142 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) [2021-06-05 16:57:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-06-05 16:57:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:31,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:31,144 INFO L521 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] [2021-06-05 16:57:31,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:31,365 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:31,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:31,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-06-05 16:57:31,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:31,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456700503] [2021-06-05 16:57:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:31,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:31,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456700503] [2021-06-05 16:57:31,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456700503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:31,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375497269] [2021-06-05 16:57:31,604 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 [2021-06-05 16:57:31,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:57:31,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:31,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:57:31,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:31,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:31,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:31,761 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 [2021-06-05 16:57:31,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:31,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:31,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:31,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:57:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:31,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375497269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:31,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:31,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:57:31,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992698640] [2021-06-05 16:57:31,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:31,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:31,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:31,789 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) [2021-06-05 16:57:33,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:33,775 INFO L93 Difference]: Finished difference Result 2938 states and 9138 transitions. [2021-06-05 16:57:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:57:33,775 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 [2021-06-05 16:57:33,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:33,779 INFO L225 Difference]: With dead ends: 2938 [2021-06-05 16:57:33,779 INFO L226 Difference]: Without dead ends: 2893 [2021-06-05 16:57:33,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1737.4ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:57:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-06-05 16:57:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1292. [2021-06-05 16:57:33,808 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) [2021-06-05 16:57:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-06-05 16:57:33,810 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-06-05 16:57:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:33,810 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-06-05 16:57:33,810 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) [2021-06-05 16:57:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-06-05 16:57:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:33,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:33,812 INFO L521 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] [2021-06-05 16:57:34,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:34,013 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1493004622, now seen corresponding path program 14 times [2021-06-05 16:57:34,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:34,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622222719] [2021-06-05 16:57:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:34,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:34,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622222719] [2021-06-05 16:57:34,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622222719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:34,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141888328] [2021-06-05 16:57:34,252 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 [2021-06-05 16:57:34,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:34,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:34,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:57:34,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:34,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:34,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:34,486 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 [2021-06-05 16:57:34,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:34,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:34,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:34,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:120 [2021-06-05 16:57:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:34,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141888328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:34,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:34,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:57:34,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506281278] [2021-06-05 16:57:34,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:57:34,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:34,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:57:34,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:57:34,688 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) [2021-06-05 16:57:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:36,846 INFO L93 Difference]: Finished difference Result 2343 states and 7345 transitions. [2021-06-05 16:57:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:57:36,847 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 [2021-06-05 16:57:36,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:36,850 INFO L225 Difference]: With dead ends: 2343 [2021-06-05 16:57:36,850 INFO L226 Difference]: Without dead ends: 2313 [2021-06-05 16:57:36,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2072.1ms TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:57:36,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-06-05 16:57:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1291. [2021-06-05 16:57:36,870 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) [2021-06-05 16:57:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 4350 transitions. [2021-06-05 16:57:36,872 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 4350 transitions. Word has length 26 [2021-06-05 16:57:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:36,872 INFO L482 AbstractCegarLoop]: Abstraction has 1291 states and 4350 transitions. [2021-06-05 16:57:36,872 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) [2021-06-05 16:57:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 4350 transitions. [2021-06-05 16:57:36,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:36,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:36,874 INFO L521 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] [2021-06-05 16:57:37,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 16:57:37,075 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:37,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1417319858, now seen corresponding path program 15 times [2021-06-05 16:57:37,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:37,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506094434] [2021-06-05 16:57:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:37,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:37,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506094434] [2021-06-05 16:57:37,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506094434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:37,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074014213] [2021-06-05 16:57:37,281 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 [2021-06-05 16:57:37,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:57:37,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:37,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:57:37,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:37,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:37,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:37,500 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 [2021-06-05 16:57:37,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:57:37,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:37,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:37,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-05 16:57:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:37,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074014213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:37,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:37,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:57:37,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078961744] [2021-06-05 16:57:37,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:37,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:37,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:37,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:37,565 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) [2021-06-05 16:57:39,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:39,201 INFO L93 Difference]: Finished difference Result 2291 states and 7285 transitions. [2021-06-05 16:57:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:57:39,201 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 [2021-06-05 16:57:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:39,212 INFO L225 Difference]: With dead ends: 2291 [2021-06-05 16:57:39,212 INFO L226 Difference]: Without dead ends: 2276 [2021-06-05 16:57:39,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1395.9ms TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:57:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-05 16:57:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1288. [2021-06-05 16:57:39,229 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) [2021-06-05 16:57:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4338 transitions. [2021-06-05 16:57:39,231 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4338 transitions. Word has length 26 [2021-06-05 16:57:39,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:39,231 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4338 transitions. [2021-06-05 16:57:39,232 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) [2021-06-05 16:57:39,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4338 transitions. [2021-06-05 16:57:39,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:39,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:39,233 INFO L521 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] [2021-06-05 16:57:39,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:39,434 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:39,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-06-05 16:57:39,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:39,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994279179] [2021-06-05 16:57:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:39,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:39,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994279179] [2021-06-05 16:57:39,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994279179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:39,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340963427] [2021-06-05 16:57:39,667 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 [2021-06-05 16:57:39,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:39,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:39,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:57:39,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:39,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:39,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:39,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:39,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:39,822 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 [2021-06-05 16:57:39,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:39,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:39,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:39,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:57:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:39,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340963427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:39,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:39,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:57:39,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596629090] [2021-06-05 16:57:39,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:39,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:39,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:39,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:39,849 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) [2021-06-05 16:57:41,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:41,543 INFO L93 Difference]: Finished difference Result 2760 states and 8712 transitions. [2021-06-05 16:57:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:57:41,543 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 [2021-06-05 16:57:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:41,547 INFO L225 Difference]: With dead ends: 2760 [2021-06-05 16:57:41,547 INFO L226 Difference]: Without dead ends: 2715 [2021-06-05 16:57:41,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1564.9ms TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:57:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-06-05 16:57:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1284. [2021-06-05 16:57:41,566 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) [2021-06-05 16:57:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4336 transitions. [2021-06-05 16:57:41,568 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4336 transitions. Word has length 26 [2021-06-05 16:57:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:41,569 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4336 transitions. [2021-06-05 16:57:41,569 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) [2021-06-05 16:57:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4336 transitions. [2021-06-05 16:57:41,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:41,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:41,570 INFO L521 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] [2021-06-05 16:57:41,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:41,771 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:41,771 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-06-05 16:57:41,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:41,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146063814] [2021-06-05 16:57:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:42,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:42,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146063814] [2021-06-05 16:57:42,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146063814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:42,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935121532] [2021-06-05 16:57:42,023 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 [2021-06-05 16:57:42,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:42,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:57:42,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:42,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:42,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:42,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:42,188 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 [2021-06-05 16:57:42,204 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:57:42,224 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-05 16:57:42,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:42,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-05 16:57:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:42,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935121532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:42,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:42,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:57:42,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575434569] [2021-06-05 16:57:42,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:42,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:42,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:42,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:42,281 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) [2021-06-05 16:57:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:44,713 INFO L93 Difference]: Finished difference Result 3079 states and 9642 transitions. [2021-06-05 16:57:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:57:44,714 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 [2021-06-05 16:57:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:44,717 INFO L225 Difference]: With dead ends: 3079 [2021-06-05 16:57:44,717 INFO L226 Difference]: Without dead ends: 3034 [2021-06-05 16:57:44,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2061.0ms TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:57:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-06-05 16:57:44,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 1288. [2021-06-05 16:57:44,748 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) [2021-06-05 16:57:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4357 transitions. [2021-06-05 16:57:44,751 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4357 transitions. Word has length 26 [2021-06-05 16:57:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:44,751 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4357 transitions. [2021-06-05 16:57:44,751 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) [2021-06-05 16:57:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4357 transitions. [2021-06-05 16:57:44,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:44,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:44,754 INFO L521 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] [2021-06-05 16:57:44,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:44,969 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:44,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 16 times [2021-06-05 16:57:44,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:44,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648781861] [2021-06-05 16:57:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:45,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:45,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648781861] [2021-06-05 16:57:45,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648781861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:45,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532668452] [2021-06-05 16:57:45,214 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) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:45,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:45,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:45,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:57:45,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:45,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:45,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:45,457 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 [2021-06-05 16:57:45,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:45,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:45,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:45,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:57:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:45,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532668452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:45,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:45,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:57:45,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890219826] [2021-06-05 16:57:45,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:45,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:45,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:45,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:45,484 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) [2021-06-05 16:57:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:45,989 INFO L93 Difference]: Finished difference Result 1650 states and 5457 transitions. [2021-06-05 16:57:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:57:45,989 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 [2021-06-05 16:57:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:45,992 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 16:57:45,992 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 16:57:45,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 600.3ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:57:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 16:57:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1305. [2021-06-05 16:57:46,009 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) [2021-06-05 16:57:46,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 4408 transitions. [2021-06-05 16:57:46,012 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 4408 transitions. Word has length 26 [2021-06-05 16:57:46,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:46,012 INFO L482 AbstractCegarLoop]: Abstraction has 1305 states and 4408 transitions. [2021-06-05 16:57:46,012 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) [2021-06-05 16:57:46,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 4408 transitions. [2021-06-05 16:57:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:46,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:46,015 INFO L521 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] [2021-06-05 16:57:46,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:46,237 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:46,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1110153644, now seen corresponding path program 17 times [2021-06-05 16:57:46,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:46,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890323130] [2021-06-05 16:57:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:46,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:46,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890323130] [2021-06-05 16:57:46,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890323130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:46,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339700416] [2021-06-05 16:57:46,458 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 [2021-06-05 16:57:46,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:46,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:46,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:57:46,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:46,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:46,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:46,670 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 [2021-06-05 16:57:46,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:46,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:46,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:46,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:57:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:46,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339700416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:46,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:46,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:57:46,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891328692] [2021-06-05 16:57:46,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:57:46,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:46,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:57:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:57:46,694 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) [2021-06-05 16:57:47,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:47,289 INFO L93 Difference]: Finished difference Result 1637 states and 5415 transitions. [2021-06-05 16:57:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:57:47,289 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 [2021-06-05 16:57:47,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:47,291 INFO L225 Difference]: With dead ends: 1637 [2021-06-05 16:57:47,291 INFO L226 Difference]: Without dead ends: 1622 [2021-06-05 16:57:47,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 686.1ms TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:57:47,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-05 16:57:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1297. [2021-06-05 16:57:47,308 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) [2021-06-05 16:57:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-05 16:57:47,310 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-05 16:57:47,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:47,311 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-05 16:57:47,311 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) [2021-06-05 16:57:47,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-05 16:57:47,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:47,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:47,313 INFO L521 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] [2021-06-05 16:57:47,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 16:57:47,525 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:47,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:47,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1553655630, now seen corresponding path program 18 times [2021-06-05 16:57:47,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:47,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112700573] [2021-06-05 16:57:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:47,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:47,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112700573] [2021-06-05 16:57:47,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112700573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:47,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254756783] [2021-06-05 16:57:47,720 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 [2021-06-05 16:57:47,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:47,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:47,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:57:47,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:47,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:47,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:47,967 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 [2021-06-05 16:57:47,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:47,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:47,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:47,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 16:57:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:47,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254756783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:47,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:47,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:57:47,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218625594] [2021-06-05 16:57:47,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:47,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:47,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:47,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:47,994 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) [2021-06-05 16:57:48,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:48,756 INFO L93 Difference]: Finished difference Result 1880 states and 6175 transitions. [2021-06-05 16:57:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:57:48,757 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 [2021-06-05 16:57:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:48,759 INFO L225 Difference]: With dead ends: 1880 [2021-06-05 16:57:48,759 INFO L226 Difference]: Without dead ends: 1865 [2021-06-05 16:57:48,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 724.0ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:57:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-06-05 16:57:48,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1306. [2021-06-05 16:57:48,780 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) [2021-06-05 16:57:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-06-05 16:57:48,782 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-06-05 16:57:48,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:48,782 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-06-05 16:57:48,783 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) [2021-06-05 16:57:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-06-05 16:57:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:48,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:48,784 INFO L521 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] [2021-06-05 16:57:48,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:48,985 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:48,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 19 times [2021-06-05 16:57:48,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:48,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173703658] [2021-06-05 16:57:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:49,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:49,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173703658] [2021-06-05 16:57:49,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173703658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:49,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894324400] [2021-06-05 16:57:49,201 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 [2021-06-05 16:57:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:49,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:57:49,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:49,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:49,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:49,401 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 [2021-06-05 16:57:49,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:49,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:49,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:49,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:57:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:49,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894324400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:49,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:49,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:57:49,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820769502] [2021-06-05 16:57:49,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:57:49,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:49,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:57:49,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:57:49,432 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) [2021-06-05 16:57:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:49,741 INFO L93 Difference]: Finished difference Result 1472 states and 4885 transitions. [2021-06-05 16:57:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:57:49,741 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 [2021-06-05 16:57:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:49,744 INFO L225 Difference]: With dead ends: 1472 [2021-06-05 16:57:49,744 INFO L226 Difference]: Without dead ends: 1457 [2021-06-05 16:57:49,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-06-05 16:57:49,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1300. [2021-06-05 16:57:49,765 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) [2021-06-05 16:57:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 4402 transitions. [2021-06-05 16:57:49,768 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 4402 transitions. Word has length 26 [2021-06-05 16:57:49,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:49,768 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 4402 transitions. [2021-06-05 16:57:49,768 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) [2021-06-05 16:57:49,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 4402 transitions. [2021-06-05 16:57:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:49,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:49,771 INFO L521 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] [2021-06-05 16:57:49,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 16:57:49,994 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:49,994 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 20 times [2021-06-05 16:57:49,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:49,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769322433] [2021-06-05 16:57:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:50,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:50,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769322433] [2021-06-05 16:57:50,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769322433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:50,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349153855] [2021-06-05 16:57:50,208 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 [2021-06-05 16:57:50,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:50,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:50,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:57:50,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:50,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:50,393 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 [2021-06-05 16:57:50,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:50,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:50,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:57:50,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-05 16:57:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:50,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349153855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:50,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:50,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:57:50,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209190203] [2021-06-05 16:57:50,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:50,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:50,523 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) [2021-06-05 16:57:51,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:51,548 INFO L93 Difference]: Finished difference Result 2107 states and 6896 transitions. [2021-06-05 16:57:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:57:51,549 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 [2021-06-05 16:57:51,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:51,551 INFO L225 Difference]: With dead ends: 2107 [2021-06-05 16:57:51,552 INFO L226 Difference]: Without dead ends: 2092 [2021-06-05 16:57:51,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1005.5ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:57:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-05 16:57:51,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1297. [2021-06-05 16:57:51,568 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) [2021-06-05 16:57:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-05 16:57:51,570 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-05 16:57:51,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:51,570 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-05 16:57:51,570 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) [2021-06-05 16:57:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-05 16:57:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:51,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:51,572 INFO L521 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] [2021-06-05 16:57:51,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:51,772 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:51,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 21 times [2021-06-05 16:57:51,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:51,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771604123] [2021-06-05 16:57:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:51,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:51,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771604123] [2021-06-05 16:57:51,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771604123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:51,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100297079] [2021-06-05 16:57:51,998 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 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 [2021-06-05 16:57:52,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:57:52,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:52,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:57:52,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:52,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:52,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:52,246 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 [2021-06-05 16:57:52,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:52,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:52,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:52,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:57:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:52,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100297079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:52,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:52,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:57:52,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560186155] [2021-06-05 16:57:52,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:52,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:52,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:52,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:52,269 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) [2021-06-05 16:57:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:53,410 INFO L93 Difference]: Finished difference Result 1853 states and 6048 transitions. [2021-06-05 16:57:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:57:53,411 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 [2021-06-05 16:57:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:53,413 INFO L225 Difference]: With dead ends: 1853 [2021-06-05 16:57:53,413 INFO L226 Difference]: Without dead ends: 1838 [2021-06-05 16:57:53,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1010.8ms TimeCoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:57:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-06-05 16:57:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1293. [2021-06-05 16:57:53,429 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) [2021-06-05 16:57:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 4370 transitions. [2021-06-05 16:57:53,431 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 4370 transitions. Word has length 26 [2021-06-05 16:57:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:53,431 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 4370 transitions. [2021-06-05 16:57:53,431 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) [2021-06-05 16:57:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 4370 transitions. [2021-06-05 16:57:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:53,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:53,433 INFO L521 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] [2021-06-05 16:57:53,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 16:57:53,648 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:53,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 22 times [2021-06-05 16:57:53,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:53,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000768731] [2021-06-05 16:57:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:53,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:53,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000768731] [2021-06-05 16:57:53,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000768731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:53,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053298426] [2021-06-05 16:57:53,877 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 [2021-06-05 16:57:53,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:53,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:53,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:57:53,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:54,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:54,094 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 [2021-06-05 16:57:54,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:54,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:54,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:54,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:57:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:54,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053298426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:54,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:54,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:57:54,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022494271] [2021-06-05 16:57:54,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:54,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:54,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:54,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:54,119 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) [2021-06-05 16:57:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:54,713 INFO L93 Difference]: Finished difference Result 1726 states and 5675 transitions. [2021-06-05 16:57:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:57:54,713 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 [2021-06-05 16:57:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:54,716 INFO L225 Difference]: With dead ends: 1726 [2021-06-05 16:57:54,716 INFO L226 Difference]: Without dead ends: 1705 [2021-06-05 16:57:54,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 577.0ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:57:54,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-05 16:57:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1334. [2021-06-05 16:57:54,732 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) [2021-06-05 16:57:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4502 transitions. [2021-06-05 16:57:54,735 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4502 transitions. Word has length 26 [2021-06-05 16:57:54,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:54,735 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4502 transitions. [2021-06-05 16:57:54,735 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) [2021-06-05 16:57:54,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4502 transitions. [2021-06-05 16:57:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:54,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:54,737 INFO L521 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] [2021-06-05 16:57:54,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:54,937 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:54,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 23 times [2021-06-05 16:57:54,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:54,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124680839] [2021-06-05 16:57:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:55,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:55,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124680839] [2021-06-05 16:57:55,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124680839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:55,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806580778] [2021-06-05 16:57:55,200 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) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:55,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:55,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:55,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:57:55,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:55,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:55,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:55,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:57:55,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:55,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:55,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:55,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-06-05 16:57:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:55,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806580778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:55,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:55,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:57:55,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216619060] [2021-06-05 16:57:55,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:57:55,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:55,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:57:55,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:57:55,449 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) [2021-06-05 16:57:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:55,908 INFO L93 Difference]: Finished difference Result 1470 states and 4841 transitions. [2021-06-05 16:57:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:57:55,908 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 [2021-06-05 16:57:55,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:55,911 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 16:57:55,911 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 16:57:55,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:57:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 16:57:55,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1328. [2021-06-05 16:57:55,925 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) [2021-06-05 16:57:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4481 transitions. [2021-06-05 16:57:55,928 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4481 transitions. Word has length 26 [2021-06-05 16:57:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:55,928 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4481 transitions. [2021-06-05 16:57:55,928 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) [2021-06-05 16:57:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4481 transitions. [2021-06-05 16:57:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:55,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:55,930 INFO L521 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] [2021-06-05 16:57:56,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 16:57:56,131 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:56,131 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 24 times [2021-06-05 16:57:56,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:56,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560007278] [2021-06-05 16:57:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:56,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:56,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560007278] [2021-06-05 16:57:56,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560007278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:56,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412428024] [2021-06-05 16:57:56,351 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 [2021-06-05 16:57:56,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:56,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:56,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:57:56,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:56,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:56,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:56,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:56,509 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 [2021-06-05 16:57:56,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:57:56,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:56,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:56,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:28 [2021-06-05 16:57:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:56,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412428024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:56,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:56,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:57:56,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893434272] [2021-06-05 16:57:56,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:56,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:56,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:56,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:56,571 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) [2021-06-05 16:57:57,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:57,270 INFO L93 Difference]: Finished difference Result 1962 states and 6398 transitions. [2021-06-05 16:57:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:57:57,270 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 [2021-06-05 16:57:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:57,273 INFO L225 Difference]: With dead ends: 1962 [2021-06-05 16:57:57,273 INFO L226 Difference]: Without dead ends: 1937 [2021-06-05 16:57:57,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 664.9ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:57:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-05 16:57:57,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1331. [2021-06-05 16:57:57,297 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) [2021-06-05 16:57:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4492 transitions. [2021-06-05 16:57:57,300 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4492 transitions. Word has length 26 [2021-06-05 16:57:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:57,300 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4492 transitions. [2021-06-05 16:57:57,300 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) [2021-06-05 16:57:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4492 transitions. [2021-06-05 16:57:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:57,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:57,303 INFO L521 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] [2021-06-05 16:57:57,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 16:57:57,526 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:57,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:57,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 25 times [2021-06-05 16:57:57,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:57,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434157564] [2021-06-05 16:57:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:57,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:57,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434157564] [2021-06-05 16:57:57,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434157564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:57,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491871511] [2021-06-05 16:57:57,774 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 [2021-06-05 16:57:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:57,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:57:57,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:57,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:57,991 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:57:57,991 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 [2021-06-05 16:57:57,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:57,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:57,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:57,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:5 [2021-06-05 16:57:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:58,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491871511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:58,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:58,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:57:58,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029401228] [2021-06-05 16:57:58,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:57:58,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:58,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:57:58,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:57:58,022 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) [2021-06-05 16:57:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:58,292 INFO L93 Difference]: Finished difference Result 1522 states and 5028 transitions. [2021-06-05 16:57:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:57:58,292 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 [2021-06-05 16:57:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:58,294 INFO L225 Difference]: With dead ends: 1522 [2021-06-05 16:57:58,294 INFO L226 Difference]: Without dead ends: 1507 [2021-06-05 16:57:58,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-06-05 16:57:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1337. [2021-06-05 16:57:58,315 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) [2021-06-05 16:57:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4515 transitions. [2021-06-05 16:57:58,317 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4515 transitions. Word has length 26 [2021-06-05 16:57:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:58,317 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4515 transitions. [2021-06-05 16:57:58,317 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) [2021-06-05 16:57:58,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4515 transitions. [2021-06-05 16:57:58,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:58,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:58,319 INFO L521 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] [2021-06-05 16:57:58,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 16:57:58,519 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:58,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:58,520 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 26 times [2021-06-05 16:57:58,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:58,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173096065] [2021-06-05 16:57:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:58,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:58,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173096065] [2021-06-05 16:57:58,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173096065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:58,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088248692] [2021-06-05 16:57:58,775 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 [2021-06-05 16:57:58,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:58,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:58,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:57:58,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:58,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:58,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:58,964 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 [2021-06-05 16:57:58,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:57:58,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:58,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:58,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-06-05 16:57:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:59,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088248692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:59,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:59,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:57:59,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427120497] [2021-06-05 16:57:59,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:59,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:59,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:59,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:59,024 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) [2021-06-05 16:57:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:59,692 INFO L93 Difference]: Finished difference Result 1802 states and 5923 transitions. [2021-06-05 16:57:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:57:59,693 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 [2021-06-05 16:57:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:59,695 INFO L225 Difference]: With dead ends: 1802 [2021-06-05 16:57:59,695 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 16:57:59,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 737.8ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:57:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 16:57:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1344. [2021-06-05 16:57:59,709 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) [2021-06-05 16:57:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4545 transitions. [2021-06-05 16:57:59,711 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4545 transitions. Word has length 26 [2021-06-05 16:57:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:59,712 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 4545 transitions. [2021-06-05 16:57:59,712 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) [2021-06-05 16:57:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4545 transitions. [2021-06-05 16:57:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:59,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:59,713 INFO L521 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] [2021-06-05 16:57:59,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:59,914 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 27 times [2021-06-05 16:57:59,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:59,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318321098] [2021-06-05 16:57:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:00,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:00,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318321098] [2021-06-05 16:58:00,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318321098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:00,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559305659] [2021-06-05 16:58:00,134 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 [2021-06-05 16:58:00,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:00,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:00,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:58:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:00,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:00,327 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 [2021-06-05 16:58:00,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:00,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:00,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:00,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:58:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:00,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559305659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:00,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:00,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:00,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23454142] [2021-06-05 16:58:00,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:00,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:00,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:00,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:00,351 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) [2021-06-05 16:58:00,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:00,827 INFO L93 Difference]: Finished difference Result 1709 states and 5671 transitions. [2021-06-05 16:58:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:58:00,828 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 [2021-06-05 16:58:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:00,830 INFO L225 Difference]: With dead ends: 1709 [2021-06-05 16:58:00,830 INFO L226 Difference]: Without dead ends: 1694 [2021-06-05 16:58:00,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 513.5ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:58:00,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-06-05 16:58:00,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1355. [2021-06-05 16:58:00,843 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) [2021-06-05 16:58:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4582 transitions. [2021-06-05 16:58:00,846 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4582 transitions. Word has length 26 [2021-06-05 16:58:00,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:00,846 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4582 transitions. [2021-06-05 16:58:00,846 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) [2021-06-05 16:58:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4582 transitions. [2021-06-05 16:58:00,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:00,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:00,847 INFO L521 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] [2021-06-05 16:58:01,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 16:58:01,048 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:01,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:01,048 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 28 times [2021-06-05 16:58:01,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:01,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810971711] [2021-06-05 16:58:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:01,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:01,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810971711] [2021-06-05 16:58:01,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810971711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:01,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811308777] [2021-06-05 16:58:01,247 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 [2021-06-05 16:58:01,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:01,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:01,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:58:01,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:01,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:01,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:01,402 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 [2021-06-05 16:58:01,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:01,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:01,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:01,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-05 16:58:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:01,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811308777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:01,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:01,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:01,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302298692] [2021-06-05 16:58:01,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:01,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:01,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:01,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:01,467 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) [2021-06-05 16:58:02,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:02,172 INFO L93 Difference]: Finished difference Result 2043 states and 6705 transitions. [2021-06-05 16:58:02,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:58:02,173 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 [2021-06-05 16:58:02,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:02,176 INFO L225 Difference]: With dead ends: 2043 [2021-06-05 16:58:02,176 INFO L226 Difference]: Without dead ends: 2024 [2021-06-05 16:58:02,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 647.1ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:58:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-06-05 16:58:02,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1356. [2021-06-05 16:58:02,192 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) [2021-06-05 16:58:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4590 transitions. [2021-06-05 16:58:02,194 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4590 transitions. Word has length 26 [2021-06-05 16:58:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:02,194 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4590 transitions. [2021-06-05 16:58:02,195 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) [2021-06-05 16:58:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4590 transitions. [2021-06-05 16:58:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:02,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:02,197 INFO L521 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] [2021-06-05 16:58:02,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:02,400 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:02,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 29 times [2021-06-05 16:58:02,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:02,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638349014] [2021-06-05 16:58:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:02,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:02,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638349014] [2021-06-05 16:58:02,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638349014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:02,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016598058] [2021-06-05 16:58:02,608 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:02,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:58:02,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:02,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:02,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:02,802 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:58:02,802 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 [2021-06-05 16:58:02,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:02,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:02,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:02,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-06-05 16:58:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:02,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016598058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:02,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:02,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:58:02,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253206408] [2021-06-05 16:58:02,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:02,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:02,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:02,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:02,858 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) [2021-06-05 16:58:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:03,597 INFO L93 Difference]: Finished difference Result 2000 states and 6546 transitions. [2021-06-05 16:58:03,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:58:03,597 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 [2021-06-05 16:58:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:03,600 INFO L225 Difference]: With dead ends: 2000 [2021-06-05 16:58:03,600 INFO L226 Difference]: Without dead ends: 1950 [2021-06-05 16:58:03,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 753.2ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:58:03,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-06-05 16:58:03,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1356. [2021-06-05 16:58:03,616 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) [2021-06-05 16:58:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4590 transitions. [2021-06-05 16:58:03,618 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4590 transitions. Word has length 26 [2021-06-05 16:58:03,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:03,618 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4590 transitions. [2021-06-05 16:58:03,618 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) [2021-06-05 16:58:03,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4590 transitions. [2021-06-05 16:58:03,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:03,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:03,620 INFO L521 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] [2021-06-05 16:58:03,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 16:58:03,820 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:03,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:03,820 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-06-05 16:58:03,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:03,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124371041] [2021-06-05 16:58:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:04,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:04,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124371041] [2021-06-05 16:58:04,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124371041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:04,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099578] [2021-06-05 16:58:04,102 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 [2021-06-05 16:58:04,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:58:04,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:04,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:58:04,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:04,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:04,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:04,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:04,299 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 [2021-06-05 16:58:04,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:04,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:04,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:04,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:58:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:04,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:04,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:04,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:58:04,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269863288] [2021-06-05 16:58:04,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:04,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:04,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:04,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:04,320 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) [2021-06-05 16:58:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:05,136 INFO L93 Difference]: Finished difference Result 1907 states and 6150 transitions. [2021-06-05 16:58:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:58:05,136 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 [2021-06-05 16:58:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:05,139 INFO L225 Difference]: With dead ends: 1907 [2021-06-05 16:58:05,139 INFO L226 Difference]: Without dead ends: 1855 [2021-06-05 16:58:05,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 904.2ms TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:58:05,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-06-05 16:58:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1390. [2021-06-05 16:58:05,155 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) [2021-06-05 16:58:05,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4689 transitions. [2021-06-05 16:58:05,158 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4689 transitions. Word has length 26 [2021-06-05 16:58:05,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:05,158 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4689 transitions. [2021-06-05 16:58:05,158 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) [2021-06-05 16:58:05,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4689 transitions. [2021-06-05 16:58:05,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:05,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:05,159 INFO L521 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] [2021-06-05 16:58:05,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 16:58:05,361 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:05,361 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-06-05 16:58:05,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:05,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98095915] [2021-06-05 16:58:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:05,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:05,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98095915] [2021-06-05 16:58:05,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98095915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:05,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968463041] [2021-06-05 16:58:05,590 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 [2021-06-05 16:58:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:05,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:58:05,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:05,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:05,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:05,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:05,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:05,782 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 [2021-06-05 16:58:05,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:05,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:05,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:05,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:58:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:05,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968463041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:05,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:05,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:58:05,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457592388] [2021-06-05 16:58:05,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:05,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:05,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:05,813 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) [2021-06-05 16:58:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:06,851 INFO L93 Difference]: Finished difference Result 1968 states and 6459 transitions. [2021-06-05 16:58:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:58:06,852 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 [2021-06-05 16:58:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:06,854 INFO L225 Difference]: With dead ends: 1968 [2021-06-05 16:58:06,855 INFO L226 Difference]: Without dead ends: 1953 [2021-06-05 16:58:06,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1001.1ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:58:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-05 16:58:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1398. [2021-06-05 16:58:06,870 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) [2021-06-05 16:58:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4709 transitions. [2021-06-05 16:58:06,873 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4709 transitions. Word has length 26 [2021-06-05 16:58:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:06,873 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4709 transitions. [2021-06-05 16:58:06,873 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) [2021-06-05 16:58:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4709 transitions. [2021-06-05 16:58:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:06,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:06,874 INFO L521 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] [2021-06-05 16:58:07,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 16:58:07,075 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:07,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:07,076 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 30 times [2021-06-05 16:58:07,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:07,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71979898] [2021-06-05 16:58:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:07,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:07,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71979898] [2021-06-05 16:58:07,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71979898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:07,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937769677] [2021-06-05 16:58:07,306 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 [2021-06-05 16:58:07,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:58:07,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:07,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:07,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:07,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:07,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:07,537 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 [2021-06-05 16:58:07,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:07,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:07,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:07,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:98 [2021-06-05 16:58:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:07,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937769677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:07,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:07,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:58:07,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808237184] [2021-06-05 16:58:07,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:07,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:07,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:07,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:07,710 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) [2021-06-05 16:58:10,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:10,155 INFO L93 Difference]: Finished difference Result 2366 states and 7465 transitions. [2021-06-05 16:58:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:58:10,155 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 [2021-06-05 16:58:10,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:10,158 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 16:58:10,158 INFO L226 Difference]: Without dead ends: 2332 [2021-06-05 16:58:10,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2231.3ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:58:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-05 16:58:10,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1421. [2021-06-05 16:58:10,176 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) [2021-06-05 16:58:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4802 transitions. [2021-06-05 16:58:10,179 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4802 transitions. Word has length 26 [2021-06-05 16:58:10,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:10,179 INFO L482 AbstractCegarLoop]: Abstraction has 1421 states and 4802 transitions. [2021-06-05 16:58:10,179 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) [2021-06-05 16:58:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4802 transitions. [2021-06-05 16:58:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:10,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:10,181 INFO L521 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] [2021-06-05 16:58:10,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:10,381 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:10,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-06-05 16:58:10,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:10,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813990778] [2021-06-05 16:58:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:10,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:10,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813990778] [2021-06-05 16:58:10,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813990778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:10,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462476156] [2021-06-05 16:58:10,726 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 [2021-06-05 16:58:10,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:10,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:58:10,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:10,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:10,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:10,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:10,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:10,984 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 [2021-06-05 16:58:10,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:11,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:11,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:11,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:46 [2021-06-05 16:58:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:11,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462476156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:11,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:11,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:58:11,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672620771] [2021-06-05 16:58:11,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:58:11,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:11,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:58:11,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:58:11,074 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) [2021-06-05 16:58:13,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:13,624 INFO L93 Difference]: Finished difference Result 2286 states and 7249 transitions. [2021-06-05 16:58:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:58:13,625 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 [2021-06-05 16:58:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:13,628 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 16:58:13,628 INFO L226 Difference]: Without dead ends: 2249 [2021-06-05 16:58:13,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2403.4ms TimeCoverageRelationStatistics Valid=447, Invalid=2415, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:58:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-06-05 16:58:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1440. [2021-06-05 16:58:13,646 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) [2021-06-05 16:58:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4863 transitions. [2021-06-05 16:58:13,649 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4863 transitions. Word has length 26 [2021-06-05 16:58:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:13,649 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 4863 transitions. [2021-06-05 16:58:13,649 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) [2021-06-05 16:58:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4863 transitions. [2021-06-05 16:58:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:13,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:13,651 INFO L521 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] [2021-06-05 16:58:13,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 16:58:13,851 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:13,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1791604362, now seen corresponding path program 31 times [2021-06-05 16:58:13,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:13,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342928869] [2021-06-05 16:58:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:14,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:14,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342928869] [2021-06-05 16:58:14,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342928869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:14,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880667494] [2021-06-05 16:58:14,046 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 [2021-06-05 16:58:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:14,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:58:14,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:14,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:14,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:14,267 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 [2021-06-05 16:58:14,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:14,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:14,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:14,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:58:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:14,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880667494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:14,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:14,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:14,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000276991] [2021-06-05 16:58:14,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:14,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:14,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:14,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:14,301 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) [2021-06-05 16:58:15,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:15,129 INFO L93 Difference]: Finished difference Result 2060 states and 6655 transitions. [2021-06-05 16:58:15,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:58:15,129 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 [2021-06-05 16:58:15,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:15,132 INFO L225 Difference]: With dead ends: 2060 [2021-06-05 16:58:15,132 INFO L226 Difference]: Without dead ends: 2045 [2021-06-05 16:58:15,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 812.1ms TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:58:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-06-05 16:58:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1446. [2021-06-05 16:58:15,148 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) [2021-06-05 16:58:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4887 transitions. [2021-06-05 16:58:15,150 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4887 transitions. Word has length 26 [2021-06-05 16:58:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:15,150 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4887 transitions. [2021-06-05 16:58:15,150 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) [2021-06-05 16:58:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4887 transitions. [2021-06-05 16:58:15,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:15,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:15,152 INFO L521 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] [2021-06-05 16:58:15,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:15,353 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:15,353 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 32 times [2021-06-05 16:58:15,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:15,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825045645] [2021-06-05 16:58:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:15,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:15,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825045645] [2021-06-05 16:58:15,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825045645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:15,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387594331] [2021-06-05 16:58:15,524 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 [2021-06-05 16:58:15,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:15,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:15,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:15,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:15,698 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 16:58:15,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:15,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:15,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 16:58:15,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:312 [2021-06-05 16:58:15,953 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 16:58:16,109 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-06-05 16:58:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:16,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387594331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:16,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:16,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:58:16,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204897730] [2021-06-05 16:58:16,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:16,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:16,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:16,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:16,160 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) [2021-06-05 16:58:17,279 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 16:58:17,426 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 38 [2021-06-05 16:58:17,569 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-05 16:58:17,919 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 16:58:18,108 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2021-06-05 16:58:18,745 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 16:58:18,940 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 26 [2021-06-05 16:58:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:19,031 INFO L93 Difference]: Finished difference Result 2667 states and 8418 transitions. [2021-06-05 16:58:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:58:19,033 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 [2021-06-05 16:58:19,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:19,037 INFO L225 Difference]: With dead ends: 2667 [2021-06-05 16:58:19,037 INFO L226 Difference]: Without dead ends: 2629 [2021-06-05 16:58:19,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2770.0ms TimeCoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:58:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-06-05 16:58:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1442. [2021-06-05 16:58:19,056 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) [2021-06-05 16:58:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4872 transitions. [2021-06-05 16:58:19,058 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4872 transitions. Word has length 26 [2021-06-05 16:58:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:19,059 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4872 transitions. [2021-06-05 16:58:19,059 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) [2021-06-05 16:58:19,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4872 transitions. [2021-06-05 16:58:19,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:19,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:19,060 INFO L521 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] [2021-06-05 16:58:19,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 16:58:19,266 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:19,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:19,266 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 45 times [2021-06-05 16:58:19,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:19,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551702540] [2021-06-05 16:58:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:19,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:19,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551702540] [2021-06-05 16:58:19,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551702540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:19,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327946572] [2021-06-05 16:58:19,514 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 [2021-06-05 16:58:19,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:19,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:19,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:58:19,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:19,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:19,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:19,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:19,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:19,771 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 [2021-06-05 16:58:19,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:19,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:19,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:19,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:46 [2021-06-05 16:58:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:19,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327946572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:19,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:19,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 16:58:19,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092822919] [2021-06-05 16:58:19,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:58:19,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:19,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:58:19,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:58:19,869 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) [2021-06-05 16:58:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:21,488 INFO L93 Difference]: Finished difference Result 2363 states and 7703 transitions. [2021-06-05 16:58:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:58:21,488 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 [2021-06-05 16:58:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:21,491 INFO L225 Difference]: With dead ends: 2363 [2021-06-05 16:58:21,491 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 16:58:21,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1474.2ms TimeCoverageRelationStatistics Valid=351, Invalid=1719, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:58:21,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 16:58:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1449. [2021-06-05 16:58:21,508 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) [2021-06-05 16:58:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4898 transitions. [2021-06-05 16:58:21,511 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4898 transitions. Word has length 26 [2021-06-05 16:58:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:21,511 INFO L482 AbstractCegarLoop]: Abstraction has 1449 states and 4898 transitions. [2021-06-05 16:58:21,511 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) [2021-06-05 16:58:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4898 transitions. [2021-06-05 16:58:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:21,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:21,513 INFO L521 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] [2021-06-05 16:58:21,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:21,713 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:21,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:21,713 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 46 times [2021-06-05 16:58:21,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:21,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296679344] [2021-06-05 16:58:21,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:21,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:21,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296679344] [2021-06-05 16:58:21,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296679344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:21,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575852864] [2021-06-05 16:58:21,973 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 [2021-06-05 16:58:21,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:21,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:21,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:21,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:22,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:22,109 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 [2021-06-05 16:58:22,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:22,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:22,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:22,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-05 16:58:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:22,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575852864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:22,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:22,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:58:22,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418799481] [2021-06-05 16:58:22,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:22,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:22,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:22,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:22,165 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) [2021-06-05 16:58:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:24,133 INFO L93 Difference]: Finished difference Result 3450 states and 10856 transitions. [2021-06-05 16:58:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:58:24,133 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 [2021-06-05 16:58:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:24,138 INFO L225 Difference]: With dead ends: 3450 [2021-06-05 16:58:24,138 INFO L226 Difference]: Without dead ends: 3393 [2021-06-05 16:58:24,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1773.7ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:58:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2021-06-05 16:58:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 1615. [2021-06-05 16:58:24,178 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) [2021-06-05 16:58:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5496 transitions. [2021-06-05 16:58:24,181 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5496 transitions. Word has length 26 [2021-06-05 16:58:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:24,181 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5496 transitions. [2021-06-05 16:58:24,181 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) [2021-06-05 16:58:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5496 transitions. [2021-06-05 16:58:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:24,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:24,183 INFO L521 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] [2021-06-05 16:58:24,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 16:58:24,385 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:24,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:24,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 33 times [2021-06-05 16:58:24,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:24,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841340330] [2021-06-05 16:58:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:24,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:24,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841340330] [2021-06-05 16:58:24,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841340330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:24,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184772204] [2021-06-05 16:58:24,565 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 [2021-06-05 16:58:24,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:24,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:58:24,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:24,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:24,795 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 [2021-06-05 16:58:24,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:24,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:24,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:24,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:75 [2021-06-05 16:58:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:24,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184772204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:24,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:24,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:58:24,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108999165] [2021-06-05 16:58:24,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:24,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:24,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:24,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:24,900 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) [2021-06-05 16:58:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:26,448 INFO L93 Difference]: Finished difference Result 2210 states and 7258 transitions. [2021-06-05 16:58:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:58:26,449 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 [2021-06-05 16:58:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:26,452 INFO L225 Difference]: With dead ends: 2210 [2021-06-05 16:58:26,452 INFO L226 Difference]: Without dead ends: 2180 [2021-06-05 16:58:26,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1263.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:58:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-06-05 16:58:26,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1620. [2021-06-05 16:58:26,470 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) [2021-06-05 16:58:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5508 transitions. [2021-06-05 16:58:26,473 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5508 transitions. Word has length 26 [2021-06-05 16:58:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:26,473 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5508 transitions. [2021-06-05 16:58:26,473 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) [2021-06-05 16:58:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5508 transitions. [2021-06-05 16:58:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:26,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:26,475 INFO L521 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] [2021-06-05 16:58:26,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:26,675 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:26,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 34 times [2021-06-05 16:58:26,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:26,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834379443] [2021-06-05 16:58:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:26,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:26,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834379443] [2021-06-05 16:58:26,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834379443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:26,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645248587] [2021-06-05 16:58:26,874 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 [2021-06-05 16:58:26,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:26,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:26,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:58:26,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:27,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:27,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:27,043 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 [2021-06-05 16:58:27,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:27,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:27,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:27,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-05 16:58:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:27,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645248587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:27,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:27,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:27,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961552071] [2021-06-05 16:58:27,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:27,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:27,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:27,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:27,094 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) [2021-06-05 16:58:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:27,813 INFO L93 Difference]: Finished difference Result 2187 states and 7261 transitions. [2021-06-05 16:58:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:58:27,813 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 [2021-06-05 16:58:27,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:27,816 INFO L225 Difference]: With dead ends: 2187 [2021-06-05 16:58:27,816 INFO L226 Difference]: Without dead ends: 2162 [2021-06-05 16:58:27,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 665.5ms TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:58:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-06-05 16:58:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1623. [2021-06-05 16:58:27,834 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) [2021-06-05 16:58:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5517 transitions. [2021-06-05 16:58:27,836 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5517 transitions. Word has length 26 [2021-06-05 16:58:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:27,837 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5517 transitions. [2021-06-05 16:58:27,837 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) [2021-06-05 16:58:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5517 transitions. [2021-06-05 16:58:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:27,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:27,839 INFO L521 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] [2021-06-05 16:58:28,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:28,041 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:28,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2031976096, now seen corresponding path program 35 times [2021-06-05 16:58:28,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:28,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352735494] [2021-06-05 16:58:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:28,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:28,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352735494] [2021-06-05 16:58:28,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352735494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:28,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277940232] [2021-06-05 16:58:28,237 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 [2021-06-05 16:58:28,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:58:28,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:28,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:58:28,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:28,450 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:58:28,450 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 [2021-06-05 16:58:28,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:28,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:28,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:28,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:19 [2021-06-05 16:58:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:28,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277940232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:28,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:28,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:58:28,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402680775] [2021-06-05 16:58:28,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:28,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:28,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:28,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:28,509 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) [2021-06-05 16:58:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:29,886 INFO L93 Difference]: Finished difference Result 2464 states and 8030 transitions. [2021-06-05 16:58:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:58:29,886 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 [2021-06-05 16:58:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:29,890 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 16:58:29,890 INFO L226 Difference]: Without dead ends: 2430 [2021-06-05 16:58:29,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1184.2ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:58:29,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-06-05 16:58:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1617. [2021-06-05 16:58:29,911 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) [2021-06-05 16:58:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5493 transitions. [2021-06-05 16:58:29,914 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5493 transitions. Word has length 26 [2021-06-05 16:58:29,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:29,914 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 5493 transitions. [2021-06-05 16:58:29,914 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) [2021-06-05 16:58:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5493 transitions. [2021-06-05 16:58:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:29,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:29,916 INFO L521 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] [2021-06-05 16:58:30,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:30,125 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:30,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 47 times [2021-06-05 16:58:30,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:30,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797053751] [2021-06-05 16:58:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:30,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:30,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797053751] [2021-06-05 16:58:30,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797053751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:30,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638641640] [2021-06-05 16:58:30,425 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 [2021-06-05 16:58:30,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:58:30,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:30,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:58:30,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:30,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:30,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:30,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:30,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:30,580 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 [2021-06-05 16:58:30,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:30,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:30,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:30,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:58:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:30,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638641640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:30,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:30,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:58:30,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685720665] [2021-06-05 16:58:30,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:30,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:30,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:30,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:30,602 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) [2021-06-05 16:58:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:31,793 INFO L93 Difference]: Finished difference Result 2080 states and 6843 transitions. [2021-06-05 16:58:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:58:31,794 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 [2021-06-05 16:58:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:31,797 INFO L225 Difference]: With dead ends: 2080 [2021-06-05 16:58:31,797 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 16:58:31,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1112.0ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:58:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 16:58:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1607. [2021-06-05 16:58:31,814 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) [2021-06-05 16:58:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5458 transitions. [2021-06-05 16:58:31,816 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5458 transitions. Word has length 26 [2021-06-05 16:58:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:31,816 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5458 transitions. [2021-06-05 16:58:31,817 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) [2021-06-05 16:58:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5458 transitions. [2021-06-05 16:58:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:31,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:31,818 INFO L521 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] [2021-06-05 16:58:32,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:32,019 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:32,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:32,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 48 times [2021-06-05 16:58:32,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:32,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017755460] [2021-06-05 16:58:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:32,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:32,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017755460] [2021-06-05 16:58:32,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017755460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:32,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893997097] [2021-06-05 16:58:32,377 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 [2021-06-05 16:58:32,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:58:32,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:32,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:32,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:32,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:32,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:32,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:32,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:32,563 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 [2021-06-05 16:58:32,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:32,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:32,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:32,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 16:58:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:32,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893997097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:32,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:32,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:58:32,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62736256] [2021-06-05 16:58:32,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:32,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:32,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:32,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:32,590 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) [2021-06-05 16:58:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:34,269 INFO L93 Difference]: Finished difference Result 2207 states and 7294 transitions. [2021-06-05 16:58:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:58:34,269 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 [2021-06-05 16:58:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:34,272 INFO L225 Difference]: With dead ends: 2207 [2021-06-05 16:58:34,272 INFO L226 Difference]: Without dead ends: 2192 [2021-06-05 16:58:34,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1605.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:58:34,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-06-05 16:58:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1607. [2021-06-05 16:58:34,291 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) [2021-06-05 16:58:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5458 transitions. [2021-06-05 16:58:34,293 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5458 transitions. Word has length 26 [2021-06-05 16:58:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:34,294 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5458 transitions. [2021-06-05 16:58:34,294 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) [2021-06-05 16:58:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5458 transitions. [2021-06-05 16:58:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:34,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:34,296 INFO L521 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] [2021-06-05 16:58:34,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 16:58:34,498 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:34,498 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 49 times [2021-06-05 16:58:34,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:34,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56518481] [2021-06-05 16:58:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:34,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:34,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56518481] [2021-06-05 16:58:34,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56518481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:34,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045304518] [2021-06-05 16:58:34,789 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 [2021-06-05 16:58:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:34,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:34,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:35,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:35,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:35,005 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 [2021-06-05 16:58:35,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:35,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:35,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:35,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:58:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:35,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045304518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:35,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:35,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:58:35,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496472321] [2021-06-05 16:58:35,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:35,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:35,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:35,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:35,040 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) [2021-06-05 16:58:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:36,692 INFO L93 Difference]: Finished difference Result 2722 states and 8796 transitions. [2021-06-05 16:58:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:58:36,693 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 [2021-06-05 16:58:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:36,696 INFO L225 Difference]: With dead ends: 2722 [2021-06-05 16:58:36,697 INFO L226 Difference]: Without dead ends: 2686 [2021-06-05 16:58:36,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1569.7ms TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:58:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-06-05 16:58:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1677. [2021-06-05 16:58:36,720 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) [2021-06-05 16:58:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5680 transitions. [2021-06-05 16:58:36,723 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5680 transitions. Word has length 26 [2021-06-05 16:58:36,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:36,723 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5680 transitions. [2021-06-05 16:58:36,723 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) [2021-06-05 16:58:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5680 transitions. [2021-06-05 16:58:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:36,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:36,726 INFO L521 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] [2021-06-05 16:58:36,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 16:58:36,926 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:36,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:36,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1611336786, now seen corresponding path program 50 times [2021-06-05 16:58:36,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:36,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626152064] [2021-06-05 16:58:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:37,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:37,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626152064] [2021-06-05 16:58:37,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626152064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:37,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308200588] [2021-06-05 16:58:37,194 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 [2021-06-05 16:58:37,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:37,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:37,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:58:37,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:37,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:37,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:37,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:37,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:37,365 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 [2021-06-05 16:58:37,381 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:58:37,396 INFO L628 ElimStorePlain]: treesize reduction 20, result has 47.4 percent of original size [2021-06-05 16:58:37,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:37,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:18 [2021-06-05 16:58:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:37,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308200588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:37,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:37,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-06-05 16:58:37,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006484651] [2021-06-05 16:58:37,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:37,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:37,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:37,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:37,459 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) [2021-06-05 16:58:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:41,594 INFO L93 Difference]: Finished difference Result 3350 states and 10511 transitions. [2021-06-05 16:58:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 16:58:41,595 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 [2021-06-05 16:58:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:41,599 INFO L225 Difference]: With dead ends: 3350 [2021-06-05 16:58:41,599 INFO L226 Difference]: Without dead ends: 3286 [2021-06-05 16:58:41,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 3634.4ms TimeCoverageRelationStatistics Valid=1163, Invalid=5317, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 16:58:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-05 16:58:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 1694. [2021-06-05 16:58:41,625 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) [2021-06-05 16:58:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 5714 transitions. [2021-06-05 16:58:41,627 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 5714 transitions. Word has length 26 [2021-06-05 16:58:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:41,628 INFO L482 AbstractCegarLoop]: Abstraction has 1694 states and 5714 transitions. [2021-06-05 16:58:41,628 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) [2021-06-05 16:58:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 5714 transitions. [2021-06-05 16:58:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:41,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:41,630 INFO L521 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] [2021-06-05 16:58:41,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 16:58:41,830 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:41,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:41,830 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-06-05 16:58:41,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:41,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212185196] [2021-06-05 16:58:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:42,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:42,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212185196] [2021-06-05 16:58:42,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212185196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:42,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653270572] [2021-06-05 16:58:42,087 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 [2021-06-05 16:58:42,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:58:42,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:42,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:42,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:42,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:42,319 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 [2021-06-05 16:58:42,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:42,519 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-05 16:58:42,519 INFO L628 ElimStorePlain]: treesize reduction 81, result has 51.5 percent of original size [2021-06-05 16:58:42,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:42,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:273 [2021-06-05 16:58:42,673 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 16:58:42,844 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 16:58:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:42,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653270572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:42,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:42,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 16:58:42,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661105533] [2021-06-05 16:58:42,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:58:42,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:42,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:58:42,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:58:42,929 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) [2021-06-05 16:58:43,894 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 16:58:44,287 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-06-05 16:58:44,555 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 16:58:44,953 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-06-05 16:58:45,638 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 16:58:45,841 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-06-05 16:58:45,990 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-06-05 16:58:46,165 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 16:58:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:46,259 INFO L93 Difference]: Finished difference Result 2842 states and 9155 transitions. [2021-06-05 16:58:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:58:46,260 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 [2021-06-05 16:58:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:46,263 INFO L225 Difference]: With dead ends: 2842 [2021-06-05 16:58:46,264 INFO L226 Difference]: Without dead ends: 2797 [2021-06-05 16:58:46,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3266.5ms TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:58:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-06-05 16:58:46,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 1705. [2021-06-05 16:58:46,285 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) [2021-06-05 16:58:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5761 transitions. [2021-06-05 16:58:46,288 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5761 transitions. Word has length 26 [2021-06-05 16:58:46,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:46,288 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5761 transitions. [2021-06-05 16:58:46,288 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) [2021-06-05 16:58:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5761 transitions. [2021-06-05 16:58:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:46,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:46,290 INFO L521 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] [2021-06-05 16:58:46,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:46,493 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:46,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:46,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-06-05 16:58:46,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:46,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286547895] [2021-06-05 16:58:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:46,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:46,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286547895] [2021-06-05 16:58:46,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286547895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:46,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038198069] [2021-06-05 16:58:46,712 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 [2021-06-05 16:58:46,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:46,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:46,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:46,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:46,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:46,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:46,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:46,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:46,898 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 [2021-06-05 16:58:46,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:46,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:46,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:46,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:10 [2021-06-05 16:58:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:46,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038198069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:46,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:46,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:58:46,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868455425] [2021-06-05 16:58:46,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:46,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:46,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:46,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:46,923 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) [2021-06-05 16:58:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:48,501 INFO L93 Difference]: Finished difference Result 2158 states and 7106 transitions. [2021-06-05 16:58:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:58:48,501 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 [2021-06-05 16:58:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:48,505 INFO L225 Difference]: With dead ends: 2158 [2021-06-05 16:58:48,505 INFO L226 Difference]: Without dead ends: 2143 [2021-06-05 16:58:48,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1448.8ms TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:58:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-06-05 16:58:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1709. [2021-06-05 16:58:48,523 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) [2021-06-05 16:58:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5775 transitions. [2021-06-05 16:58:48,526 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5775 transitions. Word has length 26 [2021-06-05 16:58:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:48,526 INFO L482 AbstractCegarLoop]: Abstraction has 1709 states and 5775 transitions. [2021-06-05 16:58:48,526 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) [2021-06-05 16:58:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5775 transitions. [2021-06-05 16:58:48,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:48,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:48,528 INFO L521 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] [2021-06-05 16:58:48,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 16:58:48,728 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-06-05 16:58:48,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:48,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862208205] [2021-06-05 16:58:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:48,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:48,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862208205] [2021-06-05 16:58:48,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862208205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:48,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126134308] [2021-06-05 16:58:48,974 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 [2021-06-05 16:58:49,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:58:49,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:49,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:58:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:49,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:49,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:49,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:49,202 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 [2021-06-05 16:58:49,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:49,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:49,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:49,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 16:58:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:49,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126134308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:49,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:49,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 16:58:49,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208100999] [2021-06-05 16:58:49,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:58:49,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:58:49,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:58:49,299 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) [2021-06-05 16:58:50,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:50,546 INFO L93 Difference]: Finished difference Result 2441 states and 8075 transitions. [2021-06-05 16:58:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:58:50,547 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 [2021-06-05 16:58:50,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:50,550 INFO L225 Difference]: With dead ends: 2441 [2021-06-05 16:58:50,550 INFO L226 Difference]: Without dead ends: 2426 [2021-06-05 16:58:50,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1087.3ms TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:58:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-05 16:58:50,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1709. [2021-06-05 16:58:50,571 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) [2021-06-05 16:58:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5775 transitions. [2021-06-05 16:58:50,574 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5775 transitions. Word has length 26 [2021-06-05 16:58:50,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:50,574 INFO L482 AbstractCegarLoop]: Abstraction has 1709 states and 5775 transitions. [2021-06-05 16:58:50,574 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) [2021-06-05 16:58:50,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5775 transitions. [2021-06-05 16:58:50,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:50,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:50,576 INFO L521 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] [2021-06-05 16:58:50,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 16:58:50,777 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:50,777 INFO L82 PathProgramCache]: Analyzing trace with hash 370367166, now seen corresponding path program 54 times [2021-06-05 16:58:50,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:50,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680338261] [2021-06-05 16:58:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:51,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:51,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680338261] [2021-06-05 16:58:51,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680338261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:51,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674373036] [2021-06-05 16:58:51,066 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 [2021-06-05 16:58:51,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:58:51,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:51,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:51,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:51,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:51,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:51,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:51,228 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 [2021-06-05 16:58:51,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:51,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:51,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:51,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:58:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:51,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674373036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:51,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:51,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:58:51,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121538184] [2021-06-05 16:58:51,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:51,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:51,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:51,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:51,254 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) [2021-06-05 16:58:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:52,054 INFO L93 Difference]: Finished difference Result 2137 states and 7029 transitions. [2021-06-05 16:58:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:58:52,054 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 [2021-06-05 16:58:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:52,057 INFO L225 Difference]: With dead ends: 2137 [2021-06-05 16:58:52,057 INFO L226 Difference]: Without dead ends: 2118 [2021-06-05 16:58:52,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 907.7ms TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:58:52,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-06-05 16:58:52,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1703. [2021-06-05 16:58:52,075 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) [2021-06-05 16:58:52,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5754 transitions. [2021-06-05 16:58:52,077 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5754 transitions. Word has length 26 [2021-06-05 16:58:52,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:52,078 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5754 transitions. [2021-06-05 16:58:52,078 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) [2021-06-05 16:58:52,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5754 transitions. [2021-06-05 16:58:52,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:52,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:52,080 INFO L521 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] [2021-06-05 16:58:52,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:52,280 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:52,280 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 55 times [2021-06-05 16:58:52,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:52,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093627965] [2021-06-05 16:58:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:52,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:52,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093627965] [2021-06-05 16:58:52,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093627965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:52,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959896880] [2021-06-05 16:58:52,610 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 [2021-06-05 16:58:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:52,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:58:52,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:52,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:52,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:52,740 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 [2021-06-05 16:58:52,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:52,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:52,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:52,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-06-05 16:58:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:52,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959896880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:52,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:52,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:58:52,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600217446] [2021-06-05 16:58:52,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:52,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:52,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:52,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:52,793 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) [2021-06-05 16:58:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:54,773 INFO L93 Difference]: Finished difference Result 2951 states and 9376 transitions. [2021-06-05 16:58:54,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:58:54,773 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 [2021-06-05 16:58:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:54,777 INFO L225 Difference]: With dead ends: 2951 [2021-06-05 16:58:54,777 INFO L226 Difference]: Without dead ends: 2932 [2021-06-05 16:58:54,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1865.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:58:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-06-05 16:58:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 1697. [2021-06-05 16:58:54,801 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) [2021-06-05 16:58:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5727 transitions. [2021-06-05 16:58:54,804 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5727 transitions. Word has length 26 [2021-06-05 16:58:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:54,804 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 5727 transitions. [2021-06-05 16:58:54,804 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) [2021-06-05 16:58:54,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5727 transitions. [2021-06-05 16:58:54,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:54,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:54,806 INFO L521 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] [2021-06-05 16:58:55,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:55,006 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:55,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:55,007 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 36 times [2021-06-05 16:58:55,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:55,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491989328] [2021-06-05 16:58:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:55,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:55,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491989328] [2021-06-05 16:58:55,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491989328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:55,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460416446] [2021-06-05 16:58:55,140 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 [2021-06-05 16:58:55,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:58:55,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:55,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:58:55,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:55,344 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:58:55,345 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 [2021-06-05 16:58:55,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:55,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:55,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:55,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:49 [2021-06-05 16:58:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:55,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460416446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:55,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:55,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:58:55,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563804156] [2021-06-05 16:58:55,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:55,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:55,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:55,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:55,405 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) [2021-06-05 16:58:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:56,815 INFO L93 Difference]: Finished difference Result 2361 states and 7668 transitions. [2021-06-05 16:58:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:58:56,816 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 [2021-06-05 16:58:56,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:56,819 INFO L225 Difference]: With dead ends: 2361 [2021-06-05 16:58:56,819 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 16:58:56,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1071.6ms TimeCoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:58:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 16:58:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1708. [2021-06-05 16:58:56,841 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) [2021-06-05 16:58:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5771 transitions. [2021-06-05 16:58:56,845 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5771 transitions. Word has length 26 [2021-06-05 16:58:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:56,845 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5771 transitions. [2021-06-05 16:58:56,845 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) [2021-06-05 16:58:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5771 transitions. [2021-06-05 16:58:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:56,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:56,848 INFO L521 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] [2021-06-05 16:58:57,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 16:58:57,061 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:57,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 37 times [2021-06-05 16:58:57,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:57,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069113342] [2021-06-05 16:58:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:57,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:57,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069113342] [2021-06-05 16:58:57,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069113342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:57,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151416782] [2021-06-05 16:58:57,180 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 [2021-06-05 16:58:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:57,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:58:57,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:57,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:57,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:57,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:57,343 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 [2021-06-05 16:58:57,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:57,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:57,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:57,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-05 16:58:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:57,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151416782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:57,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:57,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:58:57,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531333706] [2021-06-05 16:58:57,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:57,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:57,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:57,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:57,389 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) [2021-06-05 16:58:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:58,267 INFO L93 Difference]: Finished difference Result 2199 states and 7281 transitions. [2021-06-05 16:58:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:58:58,268 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 [2021-06-05 16:58:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:58,271 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 16:58:58,271 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 16:58:58,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 734.9ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:58:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 16:58:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1697. [2021-06-05 16:58:58,290 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) [2021-06-05 16:58:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5739 transitions. [2021-06-05 16:58:58,293 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5739 transitions. Word has length 26 [2021-06-05 16:58:58,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:58,293 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 5739 transitions. [2021-06-05 16:58:58,293 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) [2021-06-05 16:58:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5739 transitions. [2021-06-05 16:58:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:58,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:58,295 INFO L521 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] [2021-06-05 16:58:58,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:58,496 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:58,496 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 38 times [2021-06-05 16:58:58,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:58,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262072380] [2021-06-05 16:58:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:58,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:58,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262072380] [2021-06-05 16:58:58,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262072380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:58,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936943002] [2021-06-05 16:58:58,618 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 [2021-06-05 16:58:58,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:58,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:58,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:58,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:58,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:58,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:58,845 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 [2021-06-05 16:58:58,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:58,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:58,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:58,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 16:58:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:58,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936943002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:58,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:58,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:58:58,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551434043] [2021-06-05 16:58:58,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:58,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:58,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:58,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:58,872 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) [2021-06-05 16:58:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:59,481 INFO L93 Difference]: Finished difference Result 2365 states and 7781 transitions. [2021-06-05 16:58:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:58:59,481 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 [2021-06-05 16:58:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:59,485 INFO L225 Difference]: With dead ends: 2365 [2021-06-05 16:58:59,485 INFO L226 Difference]: Without dead ends: 2350 [2021-06-05 16:58:59,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 581.1ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:58:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-06-05 16:58:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1689. [2021-06-05 16:58:59,505 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) [2021-06-05 16:58:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 5710 transitions. [2021-06-05 16:58:59,508 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 5710 transitions. Word has length 26 [2021-06-05 16:58:59,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:59,508 INFO L482 AbstractCegarLoop]: Abstraction has 1689 states and 5710 transitions. [2021-06-05 16:58:59,508 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) [2021-06-05 16:58:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 5710 transitions. [2021-06-05 16:58:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:59,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:59,510 INFO L521 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] [2021-06-05 16:58:59,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:59,711 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:59,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 39 times [2021-06-05 16:58:59,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:59,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773734010] [2021-06-05 16:58:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:59,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:59,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773734010] [2021-06-05 16:58:59,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773734010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:59,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403323464] [2021-06-05 16:58:59,835 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 [2021-06-05 16:58:59,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:59,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:59,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:58:59,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:00,002 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:59:00,002 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 [2021-06-05 16:59:00,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:00,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:00,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:00,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-06-05 16:59:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:00,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403323464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:00,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:00,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:59:00,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626462276] [2021-06-05 16:59:00,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:00,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:00,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:00,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:00,073 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) [2021-06-05 16:59:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:00,788 INFO L93 Difference]: Finished difference Result 2545 states and 8378 transitions. [2021-06-05 16:59:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:59:00,789 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 [2021-06-05 16:59:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:00,792 INFO L225 Difference]: With dead ends: 2545 [2021-06-05 16:59:00,792 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 16:59:00,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 684.8ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:59:00,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 16:59:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1683. [2021-06-05 16:59:00,812 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) [2021-06-05 16:59:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5683 transitions. [2021-06-05 16:59:00,815 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5683 transitions. Word has length 26 [2021-06-05 16:59:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:00,815 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5683 transitions. [2021-06-05 16:59:00,815 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) [2021-06-05 16:59:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5683 transitions. [2021-06-05 16:59:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:00,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:00,817 INFO L521 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] [2021-06-05 16:59:01,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:01,018 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:01,018 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 40 times [2021-06-05 16:59:01,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:01,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95698410] [2021-06-05 16:59:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:01,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:01,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95698410] [2021-06-05 16:59:01,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95698410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:01,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133457162] [2021-06-05 16:59:01,157 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 [2021-06-05 16:59:01,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:01,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:01,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:01,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:01,381 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 16:59:01,381 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 [2021-06-05 16:59:01,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:01,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:01,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:01,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-06-05 16:59:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:01,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133457162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:01,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:01,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:01,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111025826] [2021-06-05 16:59:01,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:01,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:01,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:01,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:01,411 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) [2021-06-05 16:59:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:02,058 INFO L93 Difference]: Finished difference Result 2243 states and 7363 transitions. [2021-06-05 16:59:02,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:59:02,058 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 [2021-06-05 16:59:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:02,061 INFO L225 Difference]: With dead ends: 2243 [2021-06-05 16:59:02,061 INFO L226 Difference]: Without dead ends: 2218 [2021-06-05 16:59:02,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:59:02,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-06-05 16:59:02,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1692. [2021-06-05 16:59:02,079 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) [2021-06-05 16:59:02,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5719 transitions. [2021-06-05 16:59:02,081 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5719 transitions. Word has length 26 [2021-06-05 16:59:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:02,082 INFO L482 AbstractCegarLoop]: Abstraction has 1692 states and 5719 transitions. [2021-06-05 16:59:02,082 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) [2021-06-05 16:59:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5719 transitions. [2021-06-05 16:59:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:02,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:02,084 INFO L521 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] [2021-06-05 16:59:02,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 16:59:02,284 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:02,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1571862210, now seen corresponding path program 41 times [2021-06-05 16:59:02,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:02,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007426882] [2021-06-05 16:59:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:02,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007426882] [2021-06-05 16:59:02,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007426882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751836717] [2021-06-05 16:59:02,430 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 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 [2021-06-05 16:59:02,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:02,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:02,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:02,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:02,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:02,585 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 [2021-06-05 16:59:02,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:02,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:02,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:02,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-05 16:59:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:02,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751836717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:02,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:02,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:59:02,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872023216] [2021-06-05 16:59:02,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:02,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:02,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:02,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:02,635 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) [2021-06-05 16:59:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:03,070 INFO L93 Difference]: Finished difference Result 2410 states and 7909 transitions. [2021-06-05 16:59:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:59:03,070 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 [2021-06-05 16:59:03,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:03,073 INFO L225 Difference]: With dead ends: 2410 [2021-06-05 16:59:03,073 INFO L226 Difference]: Without dead ends: 2385 [2021-06-05 16:59:03,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 467.8ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:59:03,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-06-05 16:59:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1674. [2021-06-05 16:59:03,097 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) [2021-06-05 16:59:03,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5656 transitions. [2021-06-05 16:59:03,101 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5656 transitions. Word has length 26 [2021-06-05 16:59:03,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:03,101 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5656 transitions. [2021-06-05 16:59:03,101 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) [2021-06-05 16:59:03,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5656 transitions. [2021-06-05 16:59:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:03,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:03,104 INFO L521 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] [2021-06-05 16:59:03,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 16:59:03,326 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:03,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:03,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 42 times [2021-06-05 16:59:03,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:03,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87920707] [2021-06-05 16:59:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:03,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:03,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87920707] [2021-06-05 16:59:03,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87920707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:03,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211189439] [2021-06-05 16:59:03,465 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 [2021-06-05 16:59:03,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:03,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:03,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:59:03,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:03,665 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:59:03,666 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 [2021-06-05 16:59:03,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:03,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:03,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:03,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:78, output treesize:77 [2021-06-05 16:59:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:03,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211189439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:03,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:03,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:59:03,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314872561] [2021-06-05 16:59:03,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:03,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:03,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:03,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:03,789 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) [2021-06-05 16:59:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:04,854 INFO L93 Difference]: Finished difference Result 2335 states and 7668 transitions. [2021-06-05 16:59:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:59:04,854 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 [2021-06-05 16:59:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:04,857 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 16:59:04,857 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 16:59:04,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 774.2ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:59:04,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 16:59:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1662. [2021-06-05 16:59:04,874 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) [2021-06-05 16:59:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5614 transitions. [2021-06-05 16:59:04,877 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5614 transitions. Word has length 26 [2021-06-05 16:59:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:04,877 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5614 transitions. [2021-06-05 16:59:04,877 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) [2021-06-05 16:59:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5614 transitions. [2021-06-05 16:59:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:04,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:04,879 INFO L521 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] [2021-06-05 16:59:05,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 16:59:05,080 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:05,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:05,080 INFO L82 PathProgramCache]: Analyzing trace with hash 518793590, now seen corresponding path program 43 times [2021-06-05 16:59:05,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:05,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295910728] [2021-06-05 16:59:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:05,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:05,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295910728] [2021-06-05 16:59:05,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295910728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:05,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871518365] [2021-06-05 16:59:05,203 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 [2021-06-05 16:59:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:05,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:05,402 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-06-05 16:59:05,402 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 [2021-06-05 16:59:05,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:05,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:05,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:05,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:22 [2021-06-05 16:59:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:05,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871518365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:05,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:05,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:05,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385112995] [2021-06-05 16:59:05,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:05,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:05,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:05,455 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) [2021-06-05 16:59:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:06,209 INFO L93 Difference]: Finished difference Result 2261 states and 7456 transitions. [2021-06-05 16:59:06,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:59:06,209 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 [2021-06-05 16:59:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:06,212 INFO L225 Difference]: With dead ends: 2261 [2021-06-05 16:59:06,212 INFO L226 Difference]: Without dead ends: 2242 [2021-06-05 16:59:06,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 698.6ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:59:06,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-05 16:59:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1649. [2021-06-05 16:59:06,232 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) [2021-06-05 16:59:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5567 transitions. [2021-06-05 16:59:06,235 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5567 transitions. Word has length 26 [2021-06-05 16:59:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:06,235 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5567 transitions. [2021-06-05 16:59:06,235 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) [2021-06-05 16:59:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5567 transitions. [2021-06-05 16:59:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:06,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:06,237 INFO L521 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] [2021-06-05 16:59:06,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:06,438 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:06,438 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 44 times [2021-06-05 16:59:06,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:06,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699913090] [2021-06-05 16:59:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:06,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:06,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699913090] [2021-06-05 16:59:06,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699913090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:06,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856942850] [2021-06-05 16:59:06,560 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 [2021-06-05 16:59:06,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:06,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:06,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:06,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:06,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:06,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:06,749 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 [2021-06-05 16:59:06,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:06,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:06,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:06,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:59:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:06,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856942850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:06,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:06,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:06,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294888407] [2021-06-05 16:59:06,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:06,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:06,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:06,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:06,771 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) [2021-06-05 16:59:07,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:07,315 INFO L93 Difference]: Finished difference Result 2219 states and 7297 transitions. [2021-06-05 16:59:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:59:07,316 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 [2021-06-05 16:59:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:07,319 INFO L225 Difference]: With dead ends: 2219 [2021-06-05 16:59:07,319 INFO L226 Difference]: Without dead ends: 2204 [2021-06-05 16:59:07,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 543.6ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:59:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-05 16:59:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1700. [2021-06-05 16:59:07,341 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) [2021-06-05 16:59:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5732 transitions. [2021-06-05 16:59:07,344 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5732 transitions. Word has length 26 [2021-06-05 16:59:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:07,344 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 5732 transitions. [2021-06-05 16:59:07,344 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) [2021-06-05 16:59:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5732 transitions. [2021-06-05 16:59:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:07,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:07,347 INFO L521 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] [2021-06-05 16:59:07,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 16:59:07,547 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:07,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 45 times [2021-06-05 16:59:07,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:07,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218883653] [2021-06-05 16:59:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:07,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:07,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218883653] [2021-06-05 16:59:07,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218883653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:07,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416161369] [2021-06-05 16:59:07,678 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 [2021-06-05 16:59:07,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:07,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:07,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:07,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:07,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:07,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:07,847 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 [2021-06-05 16:59:07,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:07,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:07,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:59:07,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-05 16:59:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:07,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416161369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:07,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:07,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:59:07,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033478127] [2021-06-05 16:59:07,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:07,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:07,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:07,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:07,944 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) [2021-06-05 16:59:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:08,366 INFO L93 Difference]: Finished difference Result 2458 states and 8075 transitions. [2021-06-05 16:59:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:59:08,366 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 [2021-06-05 16:59:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:08,369 INFO L225 Difference]: With dead ends: 2458 [2021-06-05 16:59:08,369 INFO L226 Difference]: Without dead ends: 2443 [2021-06-05 16:59:08,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 493.0ms TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:59:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-05 16:59:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1695. [2021-06-05 16:59:08,389 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) [2021-06-05 16:59:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5717 transitions. [2021-06-05 16:59:08,391 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5717 transitions. Word has length 26 [2021-06-05 16:59:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:08,391 INFO L482 AbstractCegarLoop]: Abstraction has 1695 states and 5717 transitions. [2021-06-05 16:59:08,391 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) [2021-06-05 16:59:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5717 transitions. [2021-06-05 16:59:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:08,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:08,393 INFO L521 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] [2021-06-05 16:59:08,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:08,594 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:08,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:08,594 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 46 times [2021-06-05 16:59:08,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:08,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797784217] [2021-06-05 16:59:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:08,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:08,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797784217] [2021-06-05 16:59:08,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797784217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:08,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620442319] [2021-06-05 16:59:08,718 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 [2021-06-05 16:59:08,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:08,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:08,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:08,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:08,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:08,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:08,948 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 [2021-06-05 16:59:08,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:08,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:08,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:08,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 16:59:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:08,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620442319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:08,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:08,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:08,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364783229] [2021-06-05 16:59:08,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:08,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:08,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:08,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:08,975 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) [2021-06-05 16:59:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:09,471 INFO L93 Difference]: Finished difference Result 2251 states and 7431 transitions. [2021-06-05 16:59:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:59:09,471 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 [2021-06-05 16:59:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:09,474 INFO L225 Difference]: With dead ends: 2251 [2021-06-05 16:59:09,474 INFO L226 Difference]: Without dead ends: 2236 [2021-06-05 16:59:09,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:59:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-06-05 16:59:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1698. [2021-06-05 16:59:09,492 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) [2021-06-05 16:59:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 5733 transitions. [2021-06-05 16:59:09,494 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 5733 transitions. Word has length 26 [2021-06-05 16:59:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:09,494 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 5733 transitions. [2021-06-05 16:59:09,494 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) [2021-06-05 16:59:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 5733 transitions. [2021-06-05 16:59:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:09,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:09,496 INFO L521 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] [2021-06-05 16:59:09,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 16:59:09,698 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:09,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:09,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 47 times [2021-06-05 16:59:09,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:09,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621677054] [2021-06-05 16:59:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:09,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:09,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621677054] [2021-06-05 16:59:09,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621677054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:09,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777765646] [2021-06-05 16:59:09,807 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 [2021-06-05 16:59:09,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:09,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:09,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:09,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:09,990 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 16:59:09,991 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 [2021-06-05 16:59:09,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:09,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:09,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:09,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-06-05 16:59:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:10,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777765646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:10,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:10,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:10,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823276143] [2021-06-05 16:59:10,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:10,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:10,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:10,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:10,016 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) [2021-06-05 16:59:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:10,519 INFO L93 Difference]: Finished difference Result 2287 states and 7544 transitions. [2021-06-05 16:59:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:59:10,519 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 [2021-06-05 16:59:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:10,522 INFO L225 Difference]: With dead ends: 2287 [2021-06-05 16:59:10,522 INFO L226 Difference]: Without dead ends: 2272 [2021-06-05 16:59:10,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:59:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-06-05 16:59:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1716. [2021-06-05 16:59:10,539 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) [2021-06-05 16:59:10,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5787 transitions. [2021-06-05 16:59:10,542 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5787 transitions. Word has length 26 [2021-06-05 16:59:10,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:10,542 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5787 transitions. [2021-06-05 16:59:10,542 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) [2021-06-05 16:59:10,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5787 transitions. [2021-06-05 16:59:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:10,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:10,544 INFO L521 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] [2021-06-05 16:59:10,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 16:59:10,744 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:10,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:10,745 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 48 times [2021-06-05 16:59:10,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:10,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475913045] [2021-06-05 16:59:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:10,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:10,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475913045] [2021-06-05 16:59:10,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475913045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:10,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484277209] [2021-06-05 16:59:10,854 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 [2021-06-05 16:59:10,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:10,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:10,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:11,014 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:59:11,014 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 [2021-06-05 16:59:11,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:11,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:11,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:11,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-06-05 16:59:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:11,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484277209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:11,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:11,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:11,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396197481] [2021-06-05 16:59:11,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:11,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:11,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:11,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:11,059 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) [2021-06-05 16:59:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:11,857 INFO L93 Difference]: Finished difference Result 2276 states and 7538 transitions. [2021-06-05 16:59:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:59:11,858 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 [2021-06-05 16:59:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:11,861 INFO L225 Difference]: With dead ends: 2276 [2021-06-05 16:59:11,861 INFO L226 Difference]: Without dead ends: 2261 [2021-06-05 16:59:11,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 647.2ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:59:11,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-06-05 16:59:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1734. [2021-06-05 16:59:11,880 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) [2021-06-05 16:59:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5844 transitions. [2021-06-05 16:59:11,882 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5844 transitions. Word has length 26 [2021-06-05 16:59:11,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:11,883 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5844 transitions. [2021-06-05 16:59:11,883 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) [2021-06-05 16:59:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5844 transitions. [2021-06-05 16:59:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:11,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:11,885 INFO L521 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] [2021-06-05 16:59:12,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 16:59:12,087 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:12,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:12,087 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 49 times [2021-06-05 16:59:12,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:12,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468447908] [2021-06-05 16:59:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:12,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:12,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468447908] [2021-06-05 16:59:12,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468447908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:12,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276365868] [2021-06-05 16:59:12,207 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 [2021-06-05 16:59:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:12,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:12,388 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:59:12,389 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 [2021-06-05 16:59:12,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:12,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:12,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:59:12,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:67 [2021-06-05 16:59:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:12,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276365868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:12,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:12,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:59:12,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226229352] [2021-06-05 16:59:12,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:12,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:12,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:12,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:12,483 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) [2021-06-05 16:59:12,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:12,907 INFO L93 Difference]: Finished difference Result 2329 states and 7683 transitions. [2021-06-05 16:59:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:59:12,908 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 [2021-06-05 16:59:12,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:12,911 INFO L225 Difference]: With dead ends: 2329 [2021-06-05 16:59:12,911 INFO L226 Difference]: Without dead ends: 2304 [2021-06-05 16:59:12,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 457.9ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:59:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-06-05 16:59:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 1734. [2021-06-05 16:59:12,928 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) [2021-06-05 16:59:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5848 transitions. [2021-06-05 16:59:12,931 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5848 transitions. Word has length 26 [2021-06-05 16:59:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:12,931 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5848 transitions. [2021-06-05 16:59:12,931 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) [2021-06-05 16:59:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5848 transitions. [2021-06-05 16:59:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:12,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:12,933 INFO L521 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] [2021-06-05 16:59:13,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 16:59:13,133 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:13,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:13,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 50 times [2021-06-05 16:59:13,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:13,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91057335] [2021-06-05 16:59:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:13,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:13,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91057335] [2021-06-05 16:59:13,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91057335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:13,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70607011] [2021-06-05 16:59:13,245 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 [2021-06-05 16:59:13,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:13,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:13,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:13,399 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:59:13,399 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 [2021-06-05 16:59:13,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:13,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:13,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:13,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-06-05 16:59:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:13,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70607011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:13,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:13,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:13,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758212786] [2021-06-05 16:59:13,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:13,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:13,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:13,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:13,450 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) [2021-06-05 16:59:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:13,918 INFO L93 Difference]: Finished difference Result 2281 states and 7556 transitions. [2021-06-05 16:59:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:59:13,918 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 [2021-06-05 16:59:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:13,921 INFO L225 Difference]: With dead ends: 2281 [2021-06-05 16:59:13,921 INFO L226 Difference]: Without dead ends: 2266 [2021-06-05 16:59:13,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 461.0ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:59:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-06-05 16:59:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1734. [2021-06-05 16:59:13,939 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) [2021-06-05 16:59:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5848 transitions. [2021-06-05 16:59:13,942 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5848 transitions. Word has length 26 [2021-06-05 16:59:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:13,942 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5848 transitions. [2021-06-05 16:59:13,942 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) [2021-06-05 16:59:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5848 transitions. [2021-06-05 16:59:13,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:13,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:13,944 INFO L521 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] [2021-06-05 16:59:14,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:14,145 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:14,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1909155608, now seen corresponding path program 56 times [2021-06-05 16:59:14,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:14,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746900510] [2021-06-05 16:59:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:14,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:14,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746900510] [2021-06-05 16:59:14,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746900510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:14,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801958116] [2021-06-05 16:59:14,361 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 [2021-06-05 16:59:14,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:14,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:59:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:14,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:14,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:14,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:14,514 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 [2021-06-05 16:59:14,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:14,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:14,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:14,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:15 [2021-06-05 16:59:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:14,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801958116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:14,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:14,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:59:14,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325394855] [2021-06-05 16:59:14,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:14,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:14,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:14,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:14,558 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) [2021-06-05 16:59:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:15,050 INFO L93 Difference]: Finished difference Result 2265 states and 7364 transitions. [2021-06-05 16:59:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:59:15,051 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 [2021-06-05 16:59:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:15,053 INFO L225 Difference]: With dead ends: 2265 [2021-06-05 16:59:15,054 INFO L226 Difference]: Without dead ends: 2220 [2021-06-05 16:59:15,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 594.1ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:59:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-05 16:59:15,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1752. [2021-06-05 16:59:15,072 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) [2021-06-05 16:59:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5895 transitions. [2021-06-05 16:59:15,074 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5895 transitions. Word has length 26 [2021-06-05 16:59:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:15,075 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5895 transitions. [2021-06-05 16:59:15,075 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) [2021-06-05 16:59:15,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5895 transitions. [2021-06-05 16:59:15,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:15,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:15,077 INFO L521 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] [2021-06-05 16:59:15,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:15,278 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:15,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1847280054, now seen corresponding path program 57 times [2021-06-05 16:59:15,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:15,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174690042] [2021-06-05 16:59:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:15,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:15,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174690042] [2021-06-05 16:59:15,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174690042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:15,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042695589] [2021-06-05 16:59:15,486 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 [2021-06-05 16:59:15,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:59:15,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:15,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:15,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:15,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:15,662 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 [2021-06-05 16:59:15,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:15,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:15,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:15,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:33 [2021-06-05 16:59:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:15,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042695589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:15,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:15,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:15,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578872133] [2021-06-05 16:59:15,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:15,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:15,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:15,729 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) [2021-06-05 16:59:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:17,265 INFO L93 Difference]: Finished difference Result 2446 states and 7986 transitions. [2021-06-05 16:59:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:59:17,265 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 [2021-06-05 16:59:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:17,269 INFO L225 Difference]: With dead ends: 2446 [2021-06-05 16:59:17,269 INFO L226 Difference]: Without dead ends: 2431 [2021-06-05 16:59:17,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1295.7ms TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:59:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-06-05 16:59:17,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1746. [2021-06-05 16:59:17,291 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) [2021-06-05 16:59:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5872 transitions. [2021-06-05 16:59:17,294 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5872 transitions. Word has length 26 [2021-06-05 16:59:17,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:17,294 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 5872 transitions. [2021-06-05 16:59:17,294 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) [2021-06-05 16:59:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5872 transitions. [2021-06-05 16:59:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:17,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:17,296 INFO L521 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] [2021-06-05 16:59:17,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 16:59:17,497 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:17,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 58 times [2021-06-05 16:59:17,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:17,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804310743] [2021-06-05 16:59:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:17,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:17,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804310743] [2021-06-05 16:59:17,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804310743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:17,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616917254] [2021-06-05 16:59:17,659 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 [2021-06-05 16:59:17,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:17,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:17,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:17,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:17,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:17,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:17,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:17,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:17,790 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 [2021-06-05 16:59:17,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:17,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:17,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:17,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:59:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:17,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616917254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:17,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:17,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 16:59:17,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695670602] [2021-06-05 16:59:17,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:17,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:17,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:17,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:17,812 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) [2021-06-05 16:59:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:18,233 INFO L93 Difference]: Finished difference Result 2059 states and 6675 transitions. [2021-06-05 16:59:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:59:18,233 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 [2021-06-05 16:59:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:18,236 INFO L225 Difference]: With dead ends: 2059 [2021-06-05 16:59:18,236 INFO L226 Difference]: Without dead ends: 2037 [2021-06-05 16:59:18,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:59:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-06-05 16:59:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1748. [2021-06-05 16:59:18,257 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) [2021-06-05 16:59:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 5879 transitions. [2021-06-05 16:59:18,260 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 5879 transitions. Word has length 26 [2021-06-05 16:59:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:18,260 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 5879 transitions. [2021-06-05 16:59:18,260 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) [2021-06-05 16:59:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 5879 transitions. [2021-06-05 16:59:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:18,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:18,262 INFO L521 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] [2021-06-05 16:59:18,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:18,463 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:18,463 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 59 times [2021-06-05 16:59:18,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:18,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242367279] [2021-06-05 16:59:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:18,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:18,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242367279] [2021-06-05 16:59:18,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242367279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:18,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901172900] [2021-06-05 16:59:18,680 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 [2021-06-05 16:59:18,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:18,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:18,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:18,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:18,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:18,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:18,847 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 [2021-06-05 16:59:18,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:18,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:18,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:18,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:33 [2021-06-05 16:59:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:18,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901172900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:18,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:18,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:18,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878066067] [2021-06-05 16:59:18,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:18,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:18,910 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) [2021-06-05 16:59:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:19,858 INFO L93 Difference]: Finished difference Result 2318 states and 7610 transitions. [2021-06-05 16:59:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:59:19,858 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 [2021-06-05 16:59:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:19,862 INFO L225 Difference]: With dead ends: 2318 [2021-06-05 16:59:19,862 INFO L226 Difference]: Without dead ends: 2276 [2021-06-05 16:59:19,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 846.9ms TimeCoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:59:19,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-05 16:59:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1772. [2021-06-05 16:59:19,880 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) [2021-06-05 16:59:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 5948 transitions. [2021-06-05 16:59:19,883 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 5948 transitions. Word has length 26 [2021-06-05 16:59:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:19,883 INFO L482 AbstractCegarLoop]: Abstraction has 1772 states and 5948 transitions. [2021-06-05 16:59:19,883 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) [2021-06-05 16:59:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 5948 transitions. [2021-06-05 16:59:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:19,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:19,885 INFO L521 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] [2021-06-05 16:59:20,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:20,086 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:20,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:20,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1162419966, now seen corresponding path program 60 times [2021-06-05 16:59:20,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:20,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615472674] [2021-06-05 16:59:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:20,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:20,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615472674] [2021-06-05 16:59:20,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615472674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:20,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327981638] [2021-06-05 16:59:20,275 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 [2021-06-05 16:59:20,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:20,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:20,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:20,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:20,400 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 [2021-06-05 16:59:20,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:20,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:20,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:20,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:59:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:20,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327981638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:20,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:20,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 16:59:20,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818634852] [2021-06-05 16:59:20,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:20,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:20,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:20,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:20,432 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) [2021-06-05 16:59:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:20,978 INFO L93 Difference]: Finished difference Result 2209 states and 7265 transitions. [2021-06-05 16:59:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:59:20,978 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 [2021-06-05 16:59:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:20,981 INFO L225 Difference]: With dead ends: 2209 [2021-06-05 16:59:20,981 INFO L226 Difference]: Without dead ends: 2178 [2021-06-05 16:59:20,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 505.1ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:59:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-06-05 16:59:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1768. [2021-06-05 16:59:21,009 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) [2021-06-05 16:59:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5938 transitions. [2021-06-05 16:59:21,012 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5938 transitions. Word has length 26 [2021-06-05 16:59:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:21,012 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5938 transitions. [2021-06-05 16:59:21,012 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) [2021-06-05 16:59:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5938 transitions. [2021-06-05 16:59:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:21,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:21,014 INFO L521 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] [2021-06-05 16:59:21,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:21,215 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:21,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:21,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 61 times [2021-06-05 16:59:21,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:21,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300250510] [2021-06-05 16:59:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:21,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:21,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300250510] [2021-06-05 16:59:21,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300250510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:21,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928455962] [2021-06-05 16:59:21,392 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 [2021-06-05 16:59:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:21,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:21,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:21,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:21,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:21,540 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 [2021-06-05 16:59:21,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:21,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:21,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:21,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:59:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:21,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928455962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:21,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:21,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 16:59:21,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706643983] [2021-06-05 16:59:21,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:21,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:21,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:21,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:21,577 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) [2021-06-05 16:59:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:21,925 INFO L93 Difference]: Finished difference Result 2198 states and 7242 transitions. [2021-06-05 16:59:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:59:21,925 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 [2021-06-05 16:59:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:21,929 INFO L225 Difference]: With dead ends: 2198 [2021-06-05 16:59:21,929 INFO L226 Difference]: Without dead ends: 2183 [2021-06-05 16:59:21,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:59:21,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-06-05 16:59:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 1768. [2021-06-05 16:59:21,949 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) [2021-06-05 16:59:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5938 transitions. [2021-06-05 16:59:21,952 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5938 transitions. Word has length 26 [2021-06-05 16:59:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:21,952 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5938 transitions. [2021-06-05 16:59:21,952 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) [2021-06-05 16:59:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5938 transitions. [2021-06-05 16:59:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:21,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:21,954 INFO L521 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] [2021-06-05 16:59:22,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 16:59:22,155 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:22,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:22,155 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 51 times [2021-06-05 16:59:22,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:22,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866944216] [2021-06-05 16:59:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:22,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:22,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866944216] [2021-06-05 16:59:22,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866944216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:22,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686329286] [2021-06-05 16:59:22,392 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 [2021-06-05 16:59:22,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:22,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:22,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:22,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:22,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:22,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:22,645 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 [2021-06-05 16:59:22,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:22,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:22,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:22,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 16:59:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:22,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686329286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:22,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:22,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:59:22,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577714142] [2021-06-05 16:59:22,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:22,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:22,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:22,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:22,691 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) [2021-06-05 16:59:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:23,665 INFO L93 Difference]: Finished difference Result 2386 states and 7756 transitions. [2021-06-05 16:59:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:59:23,665 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 [2021-06-05 16:59:23,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:23,668 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 16:59:23,668 INFO L226 Difference]: Without dead ends: 2371 [2021-06-05 16:59:23,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 824.8ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:59:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-06-05 16:59:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1779. [2021-06-05 16:59:23,687 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) [2021-06-05 16:59:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 5976 transitions. [2021-06-05 16:59:23,690 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 5976 transitions. Word has length 26 [2021-06-05 16:59:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:23,690 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 5976 transitions. [2021-06-05 16:59:23,690 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) [2021-06-05 16:59:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 5976 transitions. [2021-06-05 16:59:23,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:23,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:23,693 INFO L521 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] [2021-06-05 16:59:23,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:23,915 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:23,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:23,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 62 times [2021-06-05 16:59:23,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:23,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994186056] [2021-06-05 16:59:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:24,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:24,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994186056] [2021-06-05 16:59:24,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994186056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:24,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618741922] [2021-06-05 16:59:24,042 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 [2021-06-05 16:59:24,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:24,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:24,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:24,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:24,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:24,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:24,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:24,212 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 [2021-06-05 16:59:24,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:24,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:24,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:24,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:59:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:24,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618741922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:24,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:24,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:59:24,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109427563] [2021-06-05 16:59:24,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:24,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:24,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:24,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:24,233 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) [2021-06-05 16:59:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:24,994 INFO L93 Difference]: Finished difference Result 2670 states and 8464 transitions. [2021-06-05 16:59:24,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:59:24,994 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 [2021-06-05 16:59:24,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:24,998 INFO L225 Difference]: With dead ends: 2670 [2021-06-05 16:59:24,998 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 16:59:24,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 639.3ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:59:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 16:59:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1831. [2021-06-05 16:59:25,020 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) [2021-06-05 16:59:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6161 transitions. [2021-06-05 16:59:25,023 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6161 transitions. Word has length 26 [2021-06-05 16:59:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:25,023 INFO L482 AbstractCegarLoop]: Abstraction has 1831 states and 6161 transitions. [2021-06-05 16:59:25,023 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) [2021-06-05 16:59:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6161 transitions. [2021-06-05 16:59:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:25,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:25,025 INFO L521 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] [2021-06-05 16:59:25,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:25,225 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:25,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:25,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 52 times [2021-06-05 16:59:25,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:25,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67627757] [2021-06-05 16:59:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:25,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:25,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67627757] [2021-06-05 16:59:25,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67627757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:25,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787600459] [2021-06-05 16:59:25,397 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 [2021-06-05 16:59:25,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:25,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:25,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:25,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:25,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:25,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:25,601 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 [2021-06-05 16:59:25,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:25,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:25,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:25,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 16:59:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:25,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787600459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:25,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:25,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:59:25,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587322311] [2021-06-05 16:59:25,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:25,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:25,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:25,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:25,625 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) [2021-06-05 16:59:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:26,659 INFO L93 Difference]: Finished difference Result 2547 states and 8275 transitions. [2021-06-05 16:59:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:59:26,659 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 [2021-06-05 16:59:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:26,663 INFO L225 Difference]: With dead ends: 2547 [2021-06-05 16:59:26,663 INFO L226 Difference]: Without dead ends: 2532 [2021-06-05 16:59:26,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 771.8ms TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:26,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-05 16:59:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1836. [2021-06-05 16:59:26,683 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) [2021-06-05 16:59:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 6180 transitions. [2021-06-05 16:59:26,686 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 6180 transitions. Word has length 26 [2021-06-05 16:59:26,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:26,686 INFO L482 AbstractCegarLoop]: Abstraction has 1836 states and 6180 transitions. [2021-06-05 16:59:26,686 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) [2021-06-05 16:59:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 6180 transitions. [2021-06-05 16:59:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:26,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:26,688 INFO L521 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] [2021-06-05 16:59:26,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:26,889 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 53 times [2021-06-05 16:59:26,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:26,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725938549] [2021-06-05 16:59:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:27,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:27,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725938549] [2021-06-05 16:59:27,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725938549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:27,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369424961] [2021-06-05 16:59:27,053 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 [2021-06-05 16:59:27,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:27,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:27,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:59:27,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:27,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:27,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:27,222 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 [2021-06-05 16:59:27,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:27,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:27,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:27,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-05 16:59:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:27,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369424961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:27,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:27,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:59:27,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023691033] [2021-06-05 16:59:27,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:27,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:27,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:27,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:27,271 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) [2021-06-05 16:59:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:28,366 INFO L93 Difference]: Finished difference Result 2824 states and 9165 transitions. [2021-06-05 16:59:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:59:28,366 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 [2021-06-05 16:59:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:28,370 INFO L225 Difference]: With dead ends: 2824 [2021-06-05 16:59:28,370 INFO L226 Difference]: Without dead ends: 2809 [2021-06-05 16:59:28,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 837.1ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:59:28,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-06-05 16:59:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 1827. [2021-06-05 16:59:28,394 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) [2021-06-05 16:59:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6147 transitions. [2021-06-05 16:59:28,397 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6147 transitions. Word has length 26 [2021-06-05 16:59:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:28,397 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6147 transitions. [2021-06-05 16:59:28,397 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) [2021-06-05 16:59:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6147 transitions. [2021-06-05 16:59:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:28,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:28,399 INFO L521 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] [2021-06-05 16:59:28,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:28,600 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 63 times [2021-06-05 16:59:28,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:28,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044642253] [2021-06-05 16:59:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:28,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:28,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044642253] [2021-06-05 16:59:28,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044642253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:28,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935126067] [2021-06-05 16:59:28,719 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 [2021-06-05 16:59:28,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:59:28,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:28,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:28,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:28,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:28,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:28,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:28,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:28,862 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 [2021-06-05 16:59:28,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:28,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:28,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:28,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:59:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:28,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935126067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:28,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:28,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:59:28,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403544796] [2021-06-05 16:59:28,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:28,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:28,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:28,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:28,887 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) [2021-06-05 16:59:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:29,651 INFO L93 Difference]: Finished difference Result 3158 states and 10100 transitions. [2021-06-05 16:59:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:59:29,651 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 [2021-06-05 16:59:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:29,656 INFO L225 Difference]: With dead ends: 3158 [2021-06-05 16:59:29,656 INFO L226 Difference]: Without dead ends: 3128 [2021-06-05 16:59:29,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 619.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:59:29,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states. [2021-06-05 16:59:29,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3128 to 1885. [2021-06-05 16:59:29,682 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) [2021-06-05 16:59:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6348 transitions. [2021-06-05 16:59:29,685 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6348 transitions. Word has length 26 [2021-06-05 16:59:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:29,685 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 6348 transitions. [2021-06-05 16:59:29,685 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) [2021-06-05 16:59:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6348 transitions. [2021-06-05 16:59:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:29,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:29,687 INFO L521 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] [2021-06-05 16:59:29,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:29,887 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:29,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:29,888 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 64 times [2021-06-05 16:59:29,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:29,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097608850] [2021-06-05 16:59:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:30,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:30,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097608850] [2021-06-05 16:59:30,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097608850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:30,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463380607] [2021-06-05 16:59:30,041 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 [2021-06-05 16:59:30,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:30,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:30,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:30,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:30,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:30,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:30,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:30,173 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 [2021-06-05 16:59:30,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:30,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:30,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:30,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-05 16:59:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:30,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463380607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:30,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:30,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:59:30,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331203949] [2021-06-05 16:59:30,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:30,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:30,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:30,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:30,233 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) [2021-06-05 16:59:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:31,346 INFO L93 Difference]: Finished difference Result 3602 states and 11423 transitions. [2021-06-05 16:59:31,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:59:31,347 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 [2021-06-05 16:59:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:31,351 INFO L225 Difference]: With dead ends: 3602 [2021-06-05 16:59:31,352 INFO L226 Difference]: Without dead ends: 3558 [2021-06-05 16:59:31,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 962.8ms TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:59:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2021-06-05 16:59:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 1897. [2021-06-05 16:59:31,380 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) [2021-06-05 16:59:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 6395 transitions. [2021-06-05 16:59:31,383 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 6395 transitions. Word has length 26 [2021-06-05 16:59:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:31,383 INFO L482 AbstractCegarLoop]: Abstraction has 1897 states and 6395 transitions. [2021-06-05 16:59:31,383 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) [2021-06-05 16:59:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 6395 transitions. [2021-06-05 16:59:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:31,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:31,385 INFO L521 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] [2021-06-05 16:59:31,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 16:59:31,585 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:31,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:31,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1345416738, now seen corresponding path program 54 times [2021-06-05 16:59:31,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:31,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040605462] [2021-06-05 16:59:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:31,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:31,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040605462] [2021-06-05 16:59:31,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040605462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:31,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810739856] [2021-06-05 16:59:31,750 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 [2021-06-05 16:59:31,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:31,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:31,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:31,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:31,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:31,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:31,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:31,898 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 [2021-06-05 16:59:31,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:31,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:31,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:31,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-05 16:59:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:31,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810739856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:31,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:31,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:31,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898771816] [2021-06-05 16:59:31,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:31,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:31,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:31,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:31,942 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) [2021-06-05 16:59:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:33,157 INFO L93 Difference]: Finished difference Result 2547 states and 8408 transitions. [2021-06-05 16:59:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:59:33,157 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 [2021-06-05 16:59:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:33,160 INFO L225 Difference]: With dead ends: 2547 [2021-06-05 16:59:33,161 INFO L226 Difference]: Without dead ends: 2532 [2021-06-05 16:59:33,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 918.3ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:59:33,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-05 16:59:33,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1907. [2021-06-05 16:59:33,182 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) [2021-06-05 16:59:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 6423 transitions. [2021-06-05 16:59:33,185 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 6423 transitions. Word has length 26 [2021-06-05 16:59:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:33,185 INFO L482 AbstractCegarLoop]: Abstraction has 1907 states and 6423 transitions. [2021-06-05 16:59:33,185 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) [2021-06-05 16:59:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 6423 transitions. [2021-06-05 16:59:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:33,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:33,187 INFO L521 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] [2021-06-05 16:59:33,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable284 [2021-06-05 16:59:33,387 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:33,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:33,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 55 times [2021-06-05 16:59:33,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:33,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070400414] [2021-06-05 16:59:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:33,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:33,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070400414] [2021-06-05 16:59:33,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070400414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:33,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249515218] [2021-06-05 16:59:33,522 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 [2021-06-05 16:59:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:33,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:33,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:33,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:33,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:33,686 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 [2021-06-05 16:59:33,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:33,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:33,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:59:33,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-05 16:59:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:33,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249515218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:33,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:33,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:59:33,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97571672] [2021-06-05 16:59:33,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:33,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:33,779 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) [2021-06-05 16:59:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:34,533 INFO L93 Difference]: Finished difference Result 2690 states and 8822 transitions. [2021-06-05 16:59:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:59:34,533 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 [2021-06-05 16:59:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:34,537 INFO L225 Difference]: With dead ends: 2690 [2021-06-05 16:59:34,537 INFO L226 Difference]: Without dead ends: 2665 [2021-06-05 16:59:34,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 638.0ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:59:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-05 16:59:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1893. [2021-06-05 16:59:34,560 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) [2021-06-05 16:59:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6385 transitions. [2021-06-05 16:59:34,563 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6385 transitions. Word has length 26 [2021-06-05 16:59:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:34,563 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 6385 transitions. [2021-06-05 16:59:34,563 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) [2021-06-05 16:59:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6385 transitions. [2021-06-05 16:59:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:34,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:34,565 INFO L521 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] [2021-06-05 16:59:34,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:34,769 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 65 times [2021-06-05 16:59:34,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:34,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108122716] [2021-06-05 16:59:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:34,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:34,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108122716] [2021-06-05 16:59:34,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108122716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:34,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968303094] [2021-06-05 16:59:34,921 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 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 [2021-06-05 16:59:34,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:34,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:34,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:35,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:35,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:35,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:35,117 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 [2021-06-05 16:59:35,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:35,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:35,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:35,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:59:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:35,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968303094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:35,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:35,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:59:35,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068066284] [2021-06-05 16:59:35,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:35,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:35,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:35,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:35,139 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) [2021-06-05 16:59:36,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:36,009 INFO L93 Difference]: Finished difference Result 2560 states and 8375 transitions. [2021-06-05 16:59:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:59:36,009 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 [2021-06-05 16:59:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:36,013 INFO L225 Difference]: With dead ends: 2560 [2021-06-05 16:59:36,013 INFO L226 Difference]: Without dead ends: 2538 [2021-06-05 16:59:36,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 842.5ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:59:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-06-05 16:59:36,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 1893. [2021-06-05 16:59:36,035 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) [2021-06-05 16:59:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6386 transitions. [2021-06-05 16:59:36,038 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6386 transitions. Word has length 26 [2021-06-05 16:59:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:36,038 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 6386 transitions. [2021-06-05 16:59:36,039 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) [2021-06-05 16:59:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6386 transitions. [2021-06-05 16:59:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:36,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:36,041 INFO L521 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] [2021-06-05 16:59:36,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:36,241 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:36,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1778019666, now seen corresponding path program 66 times [2021-06-05 16:59:36,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:36,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901556392] [2021-06-05 16:59:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:36,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:36,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901556392] [2021-06-05 16:59:36,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901556392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:36,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370627763] [2021-06-05 16:59:36,398 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 [2021-06-05 16:59:36,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:36,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:36,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:59:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:36,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:36,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:36,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:36,621 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 [2021-06-05 16:59:36,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:36,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:36,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:36,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:26 [2021-06-05 16:59:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:36,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370627763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:36,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:36,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:59:36,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979917896] [2021-06-05 16:59:36,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:36,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:36,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:36,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:36,708 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) [2021-06-05 16:59:38,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:38,349 INFO L93 Difference]: Finished difference Result 3121 states and 9982 transitions. [2021-06-05 16:59:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:59:38,350 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 [2021-06-05 16:59:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:38,354 INFO L225 Difference]: With dead ends: 3121 [2021-06-05 16:59:38,354 INFO L226 Difference]: Without dead ends: 3055 [2021-06-05 16:59:38,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1274.0ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:59:38,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-06-05 16:59:38,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 1882. [2021-06-05 16:59:38,381 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) [2021-06-05 16:59:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6338 transitions. [2021-06-05 16:59:38,384 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6338 transitions. Word has length 26 [2021-06-05 16:59:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:38,384 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 6338 transitions. [2021-06-05 16:59:38,384 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) [2021-06-05 16:59:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6338 transitions. [2021-06-05 16:59:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:38,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:38,386 INFO L521 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] [2021-06-05 16:59:38,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 16:59:38,587 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:38,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:38,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1066719206, now seen corresponding path program 56 times [2021-06-05 16:59:38,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:38,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625704881] [2021-06-05 16:59:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:38,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:38,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625704881] [2021-06-05 16:59:38,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625704881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:38,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267366272] [2021-06-05 16:59:38,728 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 [2021-06-05 16:59:38,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:38,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:38,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:38,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:38,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:38,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:38,906 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 [2021-06-05 16:59:38,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:38,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:38,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:38,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-06-05 16:59:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:38,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267366272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:38,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:38,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:38,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780174503] [2021-06-05 16:59:38,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:38,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:38,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:38,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:38,950 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) [2021-06-05 16:59:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:39,857 INFO L93 Difference]: Finished difference Result 2561 states and 8454 transitions. [2021-06-05 16:59:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:59:39,857 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 [2021-06-05 16:59:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:39,861 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 16:59:39,861 INFO L226 Difference]: Without dead ends: 2546 [2021-06-05 16:59:39,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 727.1ms TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:59:39,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-06-05 16:59:39,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1884. [2021-06-05 16:59:39,883 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) [2021-06-05 16:59:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6337 transitions. [2021-06-05 16:59:39,886 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6337 transitions. Word has length 26 [2021-06-05 16:59:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:39,886 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6337 transitions. [2021-06-05 16:59:39,886 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) [2021-06-05 16:59:39,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6337 transitions. [2021-06-05 16:59:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:39,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:39,888 INFO L521 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] [2021-06-05 16:59:40,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:40,089 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:40,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 57 times [2021-06-05 16:59:40,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:40,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612275659] [2021-06-05 16:59:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:40,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:40,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612275659] [2021-06-05 16:59:40,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612275659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:40,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486874428] [2021-06-05 16:59:40,211 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 [2021-06-05 16:59:40,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:40,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:40,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:40,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:40,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:40,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:40,391 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 [2021-06-05 16:59:40,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:40,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:40,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:59:40,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:67 [2021-06-05 16:59:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:40,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486874428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:40,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:40,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:59:40,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797390007] [2021-06-05 16:59:40,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:40,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:40,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:40,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:40,487 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) [2021-06-05 16:59:41,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:41,029 INFO L93 Difference]: Finished difference Result 2552 states and 8397 transitions. [2021-06-05 16:59:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:59:41,029 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 [2021-06-05 16:59:41,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:41,033 INFO L225 Difference]: With dead ends: 2552 [2021-06-05 16:59:41,033 INFO L226 Difference]: Without dead ends: 2527 [2021-06-05 16:59:41,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 539.6ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:59:41,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-06-05 16:59:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 1871. [2021-06-05 16:59:41,054 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) [2021-06-05 16:59:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6293 transitions. [2021-06-05 16:59:41,057 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6293 transitions. Word has length 26 [2021-06-05 16:59:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:41,057 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6293 transitions. [2021-06-05 16:59:41,057 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) [2021-06-05 16:59:41,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6293 transitions. [2021-06-05 16:59:41,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:41,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:41,059 INFO L521 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] [2021-06-05 16:59:41,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 16:59:41,260 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:41,260 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-06-05 16:59:41,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:41,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183397708] [2021-06-05 16:59:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:41,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:41,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183397708] [2021-06-05 16:59:41,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183397708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:41,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738956871] [2021-06-05 16:59:41,397 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 [2021-06-05 16:59:41,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:41,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:41,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:59:41,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:41,572 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:59:41,572 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 [2021-06-05 16:59:41,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:41,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:41,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:41,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-06-05 16:59:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:41,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738956871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:41,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:41,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:59:41,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016367796] [2021-06-05 16:59:41,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:41,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:41,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:41,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:41,624 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) [2021-06-05 16:59:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:42,205 INFO L93 Difference]: Finished difference Result 2462 states and 8140 transitions. [2021-06-05 16:59:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:59:42,205 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 [2021-06-05 16:59:42,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:42,209 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 16:59:42,209 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 16:59:42,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 414.3ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:59:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 16:59:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1865. [2021-06-05 16:59:42,229 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) [2021-06-05 16:59:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 6275 transitions. [2021-06-05 16:59:42,232 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 6275 transitions. Word has length 26 [2021-06-05 16:59:42,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:42,232 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 6275 transitions. [2021-06-05 16:59:42,232 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) [2021-06-05 16:59:42,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 6275 transitions. [2021-06-05 16:59:42,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:42,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:42,234 INFO L521 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] [2021-06-05 16:59:42,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 16:59:42,434 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:42,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:42,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1210206466, now seen corresponding path program 67 times [2021-06-05 16:59:42,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:42,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688783861] [2021-06-05 16:59:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:42,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:42,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688783861] [2021-06-05 16:59:42,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688783861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:42,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358258915] [2021-06-05 16:59:42,670 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 [2021-06-05 16:59:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:42,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:42,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:42,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:42,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:42,818 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 [2021-06-05 16:59:42,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:42,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:42,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:42,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 16:59:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:42,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358258915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:42,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:42,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:59:42,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360259381] [2021-06-05 16:59:42,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:42,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:42,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:42,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:42,845 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) [2021-06-05 16:59:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:43,610 INFO L93 Difference]: Finished difference Result 2375 states and 7798 transitions. [2021-06-05 16:59:43,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:59:43,610 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 [2021-06-05 16:59:43,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:43,614 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 16:59:43,614 INFO L226 Difference]: Without dead ends: 2356 [2021-06-05 16:59:43,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 720.4ms TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:59:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-06-05 16:59:43,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1855. [2021-06-05 16:59:43,633 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) [2021-06-05 16:59:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6242 transitions. [2021-06-05 16:59:43,636 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6242 transitions. Word has length 26 [2021-06-05 16:59:43,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:43,636 INFO L482 AbstractCegarLoop]: Abstraction has 1855 states and 6242 transitions. [2021-06-05 16:59:43,636 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) [2021-06-05 16:59:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6242 transitions. [2021-06-05 16:59:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:43,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:43,639 INFO L521 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] [2021-06-05 16:59:43,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-05 16:59:43,840 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:43,841 INFO L82 PathProgramCache]: Analyzing trace with hash -89207746, now seen corresponding path program 68 times [2021-06-05 16:59:43,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:43,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008517109] [2021-06-05 16:59:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:44,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:44,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008517109] [2021-06-05 16:59:44,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008517109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:44,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933065215] [2021-06-05 16:59:44,046 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 [2021-06-05 16:59:44,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:44,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:44,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:44,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:44,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:44,304 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 16:59:44,305 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 [2021-06-05 16:59:44,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:44,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:44,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:44,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:22 [2021-06-05 16:59:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:44,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933065215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:44,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:44,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889441016] [2021-06-05 16:59:44,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:44,372 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) [2021-06-05 16:59:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:45,240 INFO L93 Difference]: Finished difference Result 2478 states and 8169 transitions. [2021-06-05 16:59:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:59:45,240 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 [2021-06-05 16:59:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:45,243 INFO L225 Difference]: With dead ends: 2478 [2021-06-05 16:59:45,244 INFO L226 Difference]: Without dead ends: 2463 [2021-06-05 16:59:45,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 729.4ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-06-05 16:59:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1857. [2021-06-05 16:59:45,265 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) [2021-06-05 16:59:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6252 transitions. [2021-06-05 16:59:45,268 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6252 transitions. Word has length 26 [2021-06-05 16:59:45,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:45,269 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6252 transitions. [2021-06-05 16:59:45,269 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) [2021-06-05 16:59:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6252 transitions. [2021-06-05 16:59:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:45,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:45,271 INFO L521 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] [2021-06-05 16:59:45,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:45,473 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash 503651198, now seen corresponding path program 69 times [2021-06-05 16:59:45,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:45,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366109761] [2021-06-05 16:59:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:45,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:45,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366109761] [2021-06-05 16:59:45,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366109761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:45,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084733299] [2021-06-05 16:59:45,636 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 [2021-06-05 16:59:45,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:45,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:45,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:45,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:45,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:45,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:45,789 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 [2021-06-05 16:59:45,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:45,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:45,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:45,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-05 16:59:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:45,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084733299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:45,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:45,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:59:45,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437792242] [2021-06-05 16:59:45,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:45,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:45,844 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) [2021-06-05 16:59:46,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:46,541 INFO L93 Difference]: Finished difference Result 2626 states and 8587 transitions. [2021-06-05 16:59:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:59:46,541 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 [2021-06-05 16:59:46,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:46,545 INFO L225 Difference]: With dead ends: 2626 [2021-06-05 16:59:46,545 INFO L226 Difference]: Without dead ends: 2596 [2021-06-05 16:59:46,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 642.3ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-05 16:59:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1857. [2021-06-05 16:59:46,567 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) [2021-06-05 16:59:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6252 transitions. [2021-06-05 16:59:46,570 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6252 transitions. Word has length 26 [2021-06-05 16:59:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:46,570 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6252 transitions. [2021-06-05 16:59:46,570 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) [2021-06-05 16:59:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6252 transitions. [2021-06-05 16:59:46,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:46,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:46,572 INFO L521 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] [2021-06-05 16:59:46,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 16:59:46,773 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:46,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-06-05 16:59:46,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:46,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295390243] [2021-06-05 16:59:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:46,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:46,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295390243] [2021-06-05 16:59:46,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295390243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:46,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225196351] [2021-06-05 16:59:46,813 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 [2021-06-05 16:59:46,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:59:46,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:46,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:59:46,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:46,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225196351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:46,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:46,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:59:46,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149952584] [2021-06-05 16:59:46,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:46,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:46,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:46,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:46,952 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) [2021-06-05 16:59:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:47,877 INFO L93 Difference]: Finished difference Result 4803 states and 14780 transitions. [2021-06-05 16:59:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:59:47,877 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 [2021-06-05 16:59:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:47,884 INFO L225 Difference]: With dead ends: 4803 [2021-06-05 16:59:47,884 INFO L226 Difference]: Without dead ends: 4803 [2021-06-05 16:59:47,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 540.9ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:59:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-06-05 16:59:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 2054. [2021-06-05 16:59:47,922 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) [2021-06-05 16:59:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 7043 transitions. [2021-06-05 16:59:47,926 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 7043 transitions. Word has length 28 [2021-06-05 16:59:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:47,926 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 7043 transitions. [2021-06-05 16:59:47,926 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) [2021-06-05 16:59:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 7043 transitions. [2021-06-05 16:59:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:47,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:47,929 INFO L521 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] [2021-06-05 16:59:48,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 16:59:48,130 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:48,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:48,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-06-05 16:59:48,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:48,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357691835] [2021-06-05 16:59:48,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:48,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:48,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357691835] [2021-06-05 16:59:48,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357691835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:48,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834162544] [2021-06-05 16:59:48,171 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 [2021-06-05 16:59:48,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:59:48,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:48,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:59:48,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:48,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834162544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:48,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:48,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:59:48,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355384058] [2021-06-05 16:59:48,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:48,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:48,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:48,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:48,308 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) [2021-06-05 16:59:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:49,532 INFO L93 Difference]: Finished difference Result 6390 states and 19386 transitions. [2021-06-05 16:59:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:59:49,532 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 [2021-06-05 16:59:49,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:49,541 INFO L225 Difference]: With dead ends: 6390 [2021-06-05 16:59:49,541 INFO L226 Difference]: Without dead ends: 6390 [2021-06-05 16:59:49,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 728.8ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:59:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6390 states. [2021-06-05 16:59:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6390 to 2065. [2021-06-05 16:59:49,588 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) [2021-06-05 16:59:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 7097 transitions. [2021-06-05 16:59:49,592 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 7097 transitions. Word has length 28 [2021-06-05 16:59:49,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:49,592 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 7097 transitions. [2021-06-05 16:59:49,592 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) [2021-06-05 16:59:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 7097 transitions. [2021-06-05 16:59:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:49,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:49,594 INFO L521 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] [2021-06-05 16:59:49,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 16:59:49,795 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:49,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:49,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-06-05 16:59:49,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:49,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123886759] [2021-06-05 16:59:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:49,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:49,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123886759] [2021-06-05 16:59:49,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123886759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:49,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988991851] [2021-06-05 16:59:49,848 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 [2021-06-05 16:59:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:49,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:59:49,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:49,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988991851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:49,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:49,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:59:49,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263263823] [2021-06-05 16:59:49,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:49,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:49,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:49,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:49,978 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) [2021-06-05 16:59:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:51,140 INFO L93 Difference]: Finished difference Result 5783 states and 17918 transitions. [2021-06-05 16:59:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:59:51,140 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 [2021-06-05 16:59:51,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:51,148 INFO L225 Difference]: With dead ends: 5783 [2021-06-05 16:59:51,148 INFO L226 Difference]: Without dead ends: 5783 [2021-06-05 16:59:51,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 723.5ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 16:59:51,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5783 states. [2021-06-05 16:59:51,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5783 to 2013. [2021-06-05 16:59:51,189 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) [2021-06-05 16:59:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 6865 transitions. [2021-06-05 16:59:51,192 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 6865 transitions. Word has length 28 [2021-06-05 16:59:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:51,192 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 6865 transitions. [2021-06-05 16:59:51,192 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) [2021-06-05 16:59:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 6865 transitions. [2021-06-05 16:59:51,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:51,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:51,195 INFO L521 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] [2021-06-05 16:59:51,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:51,397 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:51,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-06-05 16:59:51,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:51,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800631348] [2021-06-05 16:59:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:51,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:51,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800631348] [2021-06-05 16:59:51,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800631348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:51,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802732609] [2021-06-05 16:59:51,438 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) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:51,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:51,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:51,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:59:51,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:51,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802732609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:51,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:51,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:59:51,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739323023] [2021-06-05 16:59:51,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:51,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:51,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:51,599 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) [2021-06-05 16:59:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:52,614 INFO L93 Difference]: Finished difference Result 4901 states and 14979 transitions. [2021-06-05 16:59:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:59:52,614 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 [2021-06-05 16:59:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:52,621 INFO L225 Difference]: With dead ends: 4901 [2021-06-05 16:59:52,621 INFO L226 Difference]: Without dead ends: 4901 [2021-06-05 16:59:52,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 663.2ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:59:52,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-05 16:59:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 2023. [2021-06-05 16:59:52,656 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) [2021-06-05 16:59:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6891 transitions. [2021-06-05 16:59:52,660 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6891 transitions. Word has length 28 [2021-06-05 16:59:52,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:52,660 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 6891 transitions. [2021-06-05 16:59:52,660 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) [2021-06-05 16:59:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6891 transitions. [2021-06-05 16:59:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:52,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:52,662 INFO L521 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] [2021-06-05 16:59:52,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:52,863 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:52,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:52,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 70 times [2021-06-05 16:59:52,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:52,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042493985] [2021-06-05 16:59:52,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:52,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:52,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042493985] [2021-06-05 16:59:52,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042493985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:52,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599702449] [2021-06-05 16:59:52,904 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 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 [2021-06-05 16:59:52,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:52,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:52,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:59:52,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:53,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599702449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:53,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:53,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:59:53,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247327892] [2021-06-05 16:59:53,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:59:53,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:53,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:59:53,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:59:53,026 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) [2021-06-05 16:59:53,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:53,601 INFO L93 Difference]: Finished difference Result 4322 states and 13382 transitions. [2021-06-05 16:59:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:59:53,601 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 [2021-06-05 16:59:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:53,607 INFO L225 Difference]: With dead ends: 4322 [2021-06-05 16:59:53,607 INFO L226 Difference]: Without dead ends: 4322 [2021-06-05 16:59:53,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:59:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4322 states. [2021-06-05 16:59:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4322 to 2079. [2021-06-05 16:59:53,641 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) [2021-06-05 16:59:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 7054 transitions. [2021-06-05 16:59:53,645 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 7054 transitions. Word has length 28 [2021-06-05 16:59:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:53,645 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 7054 transitions. [2021-06-05 16:59:53,645 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) [2021-06-05 16:59:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 7054 transitions. [2021-06-05 16:59:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:53,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:53,647 INFO L521 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] [2021-06-05 16:59:53,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 16:59:53,848 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:53,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-06-05 16:59:53,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:53,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244862873] [2021-06-05 16:59:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:59:53,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:53,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244862873] [2021-06-05 16:59:53,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244862873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:53,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227485078] [2021-06-05 16:59:53,875 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 [2021-06-05 16:59:53,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:53,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:53,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:59:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:59:53,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227485078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:53,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:53,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:59:53,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534020059] [2021-06-05 16:59:53,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:59:53,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:53,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:59:53,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:59:53,974 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) [2021-06-05 16:59:54,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:54,148 INFO L93 Difference]: Finished difference Result 3611 states and 11674 transitions. [2021-06-05 16:59:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:59:54,148 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 [2021-06-05 16:59:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:54,153 INFO L225 Difference]: With dead ends: 3611 [2021-06-05 16:59:54,153 INFO L226 Difference]: Without dead ends: 3593 [2021-06-05 16:59:54,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:59:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-06-05 16:59:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 2470. [2021-06-05 16:59:54,186 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) [2021-06-05 16:59:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8574 transitions. [2021-06-05 16:59:54,191 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8574 transitions. Word has length 28 [2021-06-05 16:59:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:54,191 INFO L482 AbstractCegarLoop]: Abstraction has 2470 states and 8574 transitions. [2021-06-05 16:59:54,191 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) [2021-06-05 16:59:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8574 transitions. [2021-06-05 16:59:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:54,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:54,194 INFO L521 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] [2021-06-05 16:59:54,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 16:59:54,395 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:54,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-06-05 16:59:54,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:54,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890886310] [2021-06-05 16:59:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:54,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890886310] [2021-06-05 16:59:54,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890886310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545359308] [2021-06-05 16:59:54,428 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 [2021-06-05 16:59:54,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:54,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:54,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:59:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:54,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545359308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:54,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:54,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:59:54,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228185867] [2021-06-05 16:59:54,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:59:54,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:54,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:59:54,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:59:54,547 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) [2021-06-05 16:59:55,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:55,109 INFO L93 Difference]: Finished difference Result 4256 states and 13496 transitions. [2021-06-05 16:59:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:59:55,110 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 [2021-06-05 16:59:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:55,115 INFO L225 Difference]: With dead ends: 4256 [2021-06-05 16:59:55,116 INFO L226 Difference]: Without dead ends: 4209 [2021-06-05 16:59:55,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 345.6ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:59:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2021-06-05 16:59:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 2635. [2021-06-05 16:59:55,155 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) [2021-06-05 16:59:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 9202 transitions. [2021-06-05 16:59:55,160 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 9202 transitions. Word has length 28 [2021-06-05 16:59:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:55,160 INFO L482 AbstractCegarLoop]: Abstraction has 2635 states and 9202 transitions. [2021-06-05 16:59:55,161 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) [2021-06-05 16:59:55,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 9202 transitions. [2021-06-05 16:59:55,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:55,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:55,164 INFO L521 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] [2021-06-05 16:59:55,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:55,364 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:55,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:55,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1904037996, now seen corresponding path program 71 times [2021-06-05 16:59:55,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:55,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893087175] [2021-06-05 16:59:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:55,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:55,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893087175] [2021-06-05 16:59:55,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893087175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:55,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428841696] [2021-06-05 16:59:55,411 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 [2021-06-05 16:59:55,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:59:55,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:55,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:59:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:55,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428841696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:55,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:55,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 16:59:55,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433673863] [2021-06-05 16:59:55,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:55,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:55,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:55,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:55,532 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) [2021-06-05 16:59:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:55,954 INFO L93 Difference]: Finished difference Result 5094 states and 16833 transitions. [2021-06-05 16:59:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:59:55,954 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 [2021-06-05 16:59:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:55,962 INFO L225 Difference]: With dead ends: 5094 [2021-06-05 16:59:55,962 INFO L226 Difference]: Without dead ends: 5007 [2021-06-05 16:59:55,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:59:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5007 states. [2021-06-05 16:59:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5007 to 3294. [2021-06-05 16:59:56,024 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) [2021-06-05 16:59:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 11593 transitions. [2021-06-05 16:59:56,031 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 11593 transitions. Word has length 28 [2021-06-05 16:59:56,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:56,031 INFO L482 AbstractCegarLoop]: Abstraction has 3294 states and 11593 transitions. [2021-06-05 16:59:56,032 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) [2021-06-05 16:59:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 11593 transitions. [2021-06-05 16:59:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:56,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:56,036 INFO L521 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] [2021-06-05 16:59:56,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-05 16:59:56,236 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:56,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-06-05 16:59:56,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:56,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493297794] [2021-06-05 16:59:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:56,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:56,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493297794] [2021-06-05 16:59:56,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493297794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:56,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585314677] [2021-06-05 16:59:56,272 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 [2021-06-05 16:59:56,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:59:56,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:56,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:59:56,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:56,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585314677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:56,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:56,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:59:56,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642683556] [2021-06-05 16:59:56,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:59:56,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:56,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:59:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:59:56,390 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) [2021-06-05 16:59:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:57,054 INFO L93 Difference]: Finished difference Result 5537 states and 17511 transitions. [2021-06-05 16:59:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:59:57,054 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 [2021-06-05 16:59:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:57,062 INFO L225 Difference]: With dead ends: 5537 [2021-06-05 16:59:57,062 INFO L226 Difference]: Without dead ends: 5511 [2021-06-05 16:59:57,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 426.4ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:59:57,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-06-05 16:59:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 3312. [2021-06-05 16:59:57,121 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) [2021-06-05 16:59:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 11674 transitions. [2021-06-05 16:59:57,127 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 11674 transitions. Word has length 28 [2021-06-05 16:59:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:57,127 INFO L482 AbstractCegarLoop]: Abstraction has 3312 states and 11674 transitions. [2021-06-05 16:59:57,127 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) [2021-06-05 16:59:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 11674 transitions. [2021-06-05 16:59:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:57,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:57,132 INFO L521 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] [2021-06-05 16:59:57,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:57,332 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:57,332 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-06-05 16:59:57,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:57,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428678589] [2021-06-05 16:59:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:57,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:57,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428678589] [2021-06-05 16:59:57,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428678589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:57,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149311754] [2021-06-05 16:59:57,366 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 [2021-06-05 16:59:57,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:59:57,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:57,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:59:57,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:57,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149311754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:57,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:57,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:59:57,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523714759] [2021-06-05 16:59:57,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:59:57,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:57,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:59:57,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:59:57,500 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) [2021-06-05 16:59:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:58,188 INFO L93 Difference]: Finished difference Result 5592 states and 17703 transitions. [2021-06-05 16:59:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:59:58,189 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 [2021-06-05 16:59:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:58,197 INFO L225 Difference]: With dead ends: 5592 [2021-06-05 16:59:58,197 INFO L226 Difference]: Without dead ends: 5561 [2021-06-05 16:59:58,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:59:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2021-06-05 16:59:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 3305. [2021-06-05 16:59:58,258 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) [2021-06-05 16:59:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 11670 transitions. [2021-06-05 16:59:58,265 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 11670 transitions. Word has length 28 [2021-06-05 16:59:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:58,265 INFO L482 AbstractCegarLoop]: Abstraction has 3305 states and 11670 transitions. [2021-06-05 16:59:58,265 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) [2021-06-05 16:59:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 11670 transitions. [2021-06-05 16:59:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:58,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:58,270 INFO L521 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] [2021-06-05 16:59:58,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 16:59:58,470 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-06-05 16:59:58,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:58,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673616363] [2021-06-05 16:59:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:58,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:58,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673616363] [2021-06-05 16:59:58,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673616363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:58,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881998294] [2021-06-05 16:59:58,507 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 [2021-06-05 16:59:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:58,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:59:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:58,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881998294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:58,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:58,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:59:58,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048680542] [2021-06-05 16:59:58,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:59:58,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:58,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:59:58,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:59:58,600 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) [2021-06-05 16:59:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:59,149 INFO L93 Difference]: Finished difference Result 6756 states and 21782 transitions. [2021-06-05 16:59:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:59:59,149 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 [2021-06-05 16:59:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:59,159 INFO L225 Difference]: With dead ends: 6756 [2021-06-05 16:59:59,159 INFO L226 Difference]: Without dead ends: 6709 [2021-06-05 16:59:59,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:59:59,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6709 states. [2021-06-05 16:59:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 3468. [2021-06-05 16:59:59,227 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) [2021-06-05 16:59:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 12407 transitions. [2021-06-05 16:59:59,234 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 12407 transitions. Word has length 28 [2021-06-05 16:59:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:59,234 INFO L482 AbstractCegarLoop]: Abstraction has 3468 states and 12407 transitions. [2021-06-05 16:59:59,234 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) [2021-06-05 16:59:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 12407 transitions. [2021-06-05 16:59:59,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:59,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:59,239 INFO L521 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] [2021-06-05 16:59:59,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 16:59:59,439 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:59,440 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-06-05 16:59:59,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:59,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153418510] [2021-06-05 16:59:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:59:59,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:59,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153418510] [2021-06-05 16:59:59,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153418510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:59,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231870722] [2021-06-05 16:59:59,464 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 [2021-06-05 16:59:59,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:59,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:59,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:59:59,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:59:59,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231870722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:59,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:59,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:59:59,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343797886] [2021-06-05 16:59:59,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:59:59,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:59,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:59:59,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:59:59,548 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) [2021-06-05 16:59:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:59,706 INFO L93 Difference]: Finished difference Result 5162 states and 17045 transitions. [2021-06-05 16:59:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:59:59,707 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 [2021-06-05 16:59:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:59,714 INFO L225 Difference]: With dead ends: 5162 [2021-06-05 16:59:59,714 INFO L226 Difference]: Without dead ends: 5162 [2021-06-05 16:59:59,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:59,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-06-05 16:59:59,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 3300. [2021-06-05 16:59:59,763 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) [2021-06-05 16:59:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 11673 transitions. [2021-06-05 16:59:59,769 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 11673 transitions. Word has length 28 [2021-06-05 16:59:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:59,769 INFO L482 AbstractCegarLoop]: Abstraction has 3300 states and 11673 transitions. [2021-06-05 16:59:59,769 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) [2021-06-05 16:59:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 11673 transitions. [2021-06-05 16:59:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:59:59,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:59,773 INFO L521 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] [2021-06-05 16:59:59,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 16:59:59,974 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:59,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:59,974 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-06-05 16:59:59,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:59,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105010428] [2021-06-05 16:59:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:00,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:00,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105010428] [2021-06-05 17:00:00,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105010428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:00,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735982007] [2021-06-05 17:00:00,034 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 [2021-06-05 17:00:00,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:00:00,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:00,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:00,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:00,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735982007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:00,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:00,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:00:00,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551503916] [2021-06-05 17:00:00,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:00,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:00,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:00,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:00,140 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) [2021-06-05 17:00:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:00,805 INFO L93 Difference]: Finished difference Result 7204 states and 22976 transitions. [2021-06-05 17:00:00,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:00:00,805 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 [2021-06-05 17:00:00,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:00,815 INFO L225 Difference]: With dead ends: 7204 [2021-06-05 17:00:00,816 INFO L226 Difference]: Without dead ends: 7204 [2021-06-05 17:00:00,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:00:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7204 states. [2021-06-05 17:00:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7204 to 3330. [2021-06-05 17:00:00,885 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) [2021-06-05 17:00:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 11778 transitions. [2021-06-05 17:00:00,892 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 11778 transitions. Word has length 28 [2021-06-05 17:00:00,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:00,892 INFO L482 AbstractCegarLoop]: Abstraction has 3330 states and 11778 transitions. [2021-06-05 17:00:00,892 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) [2021-06-05 17:00:00,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 11778 transitions. [2021-06-05 17:00:00,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:00,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:00,896 INFO L521 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] [2021-06-05 17:00:01,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 17:00:01,097 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:01,097 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-06-05 17:00:01,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:01,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262923095] [2021-06-05 17:00:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:01,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:01,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262923095] [2021-06-05 17:00:01,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262923095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:01,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740581716] [2021-06-05 17:00:01,130 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 [2021-06-05 17:00:01,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:01,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:01,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:01,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:01,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740581716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:01,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:01,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:00:01,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824961968] [2021-06-05 17:00:01,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:01,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:01,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:01,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:01,229 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) [2021-06-05 17:00:01,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:01,958 INFO L93 Difference]: Finished difference Result 7509 states and 23981 transitions. [2021-06-05 17:00:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 17:00:01,958 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 [2021-06-05 17:00:01,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:01,971 INFO L225 Difference]: With dead ends: 7509 [2021-06-05 17:00:01,971 INFO L226 Difference]: Without dead ends: 7509 [2021-06-05 17:00:01,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:00:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2021-06-05 17:00:02,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 3460. [2021-06-05 17:00:02,072 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) [2021-06-05 17:00:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 12185 transitions. [2021-06-05 17:00:02,079 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 12185 transitions. Word has length 28 [2021-06-05 17:00:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:02,079 INFO L482 AbstractCegarLoop]: Abstraction has 3460 states and 12185 transitions. [2021-06-05 17:00:02,079 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) [2021-06-05 17:00:02,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 12185 transitions. [2021-06-05 17:00:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:02,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:02,084 INFO L521 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] [2021-06-05 17:00:02,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 17:00:02,285 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:02,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:02,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-06-05 17:00:02,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:02,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100144086] [2021-06-05 17:00:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:02,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:02,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100144086] [2021-06-05 17:00:02,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100144086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:02,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49612845] [2021-06-05 17:00:02,317 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 [2021-06-05 17:00:02,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:00:02,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:02,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:02,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:02,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49612845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:02,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:02,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:00:02,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376393691] [2021-06-05 17:00:02,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:02,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:02,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:02,410 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) [2021-06-05 17:00:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:03,018 INFO L93 Difference]: Finished difference Result 8003 states and 25580 transitions. [2021-06-05 17:00:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:00:03,018 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 [2021-06-05 17:00:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:03,031 INFO L225 Difference]: With dead ends: 8003 [2021-06-05 17:00:03,031 INFO L226 Difference]: Without dead ends: 7990 [2021-06-05 17:00:03,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 347.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:00:03,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-05 17:00:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 4105. [2021-06-05 17:00:03,120 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) [2021-06-05 17:00:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 14647 transitions. [2021-06-05 17:00:03,129 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 14647 transitions. Word has length 28 [2021-06-05 17:00:03,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:03,129 INFO L482 AbstractCegarLoop]: Abstraction has 4105 states and 14647 transitions. [2021-06-05 17:00:03,129 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) [2021-06-05 17:00:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 14647 transitions. [2021-06-05 17:00:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:03,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:03,134 INFO L521 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] [2021-06-05 17:00:03,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 17:00:03,335 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:03,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:03,335 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-06-05 17:00:03,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:03,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726701189] [2021-06-05 17:00:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:03,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:03,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726701189] [2021-06-05 17:00:03,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726701189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:03,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492806548] [2021-06-05 17:00:03,367 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 [2021-06-05 17:00:03,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:03,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:03,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:03,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:03,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492806548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:03,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:03,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:00:03,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608178449] [2021-06-05 17:00:03,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:03,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:03,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:03,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:03,484 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) [2021-06-05 17:00:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:04,126 INFO L93 Difference]: Finished difference Result 8255 states and 26274 transitions. [2021-06-05 17:00:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:00:04,127 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 [2021-06-05 17:00:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:04,142 INFO L225 Difference]: With dead ends: 8255 [2021-06-05 17:00:04,142 INFO L226 Difference]: Without dead ends: 8255 [2021-06-05 17:00:04,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 388.4ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:00:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-06-05 17:00:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 3852. [2021-06-05 17:00:04,243 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) [2021-06-05 17:00:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 13611 transitions. [2021-06-05 17:00:04,251 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 13611 transitions. Word has length 28 [2021-06-05 17:00:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:04,251 INFO L482 AbstractCegarLoop]: Abstraction has 3852 states and 13611 transitions. [2021-06-05 17:00:04,251 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) [2021-06-05 17:00:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 13611 transitions. [2021-06-05 17:00:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:04,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:04,256 INFO L521 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] [2021-06-05 17:00:04,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:04,461 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:04,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:04,461 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-06-05 17:00:04,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:04,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49344953] [2021-06-05 17:00:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:04,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:04,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49344953] [2021-06-05 17:00:04,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49344953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:04,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628820807] [2021-06-05 17:00:04,495 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 [2021-06-05 17:00:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:04,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:04,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:04,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628820807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:04,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:04,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:00:04,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367204089] [2021-06-05 17:00:04,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:04,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:04,599 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) [2021-06-05 17:00:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:05,336 INFO L93 Difference]: Finished difference Result 7348 states and 24071 transitions. [2021-06-05 17:00:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:00:05,337 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 [2021-06-05 17:00:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:05,350 INFO L225 Difference]: With dead ends: 7348 [2021-06-05 17:00:05,350 INFO L226 Difference]: Without dead ends: 7344 [2021-06-05 17:00:05,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:00:05,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7344 states. [2021-06-05 17:00:05,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7344 to 3485. [2021-06-05 17:00:05,428 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) [2021-06-05 17:00:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3485 states to 3485 states and 12465 transitions. [2021-06-05 17:00:05,436 INFO L78 Accepts]: Start accepts. Automaton has 3485 states and 12465 transitions. Word has length 28 [2021-06-05 17:00:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:05,436 INFO L482 AbstractCegarLoop]: Abstraction has 3485 states and 12465 transitions. [2021-06-05 17:00:05,436 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) [2021-06-05 17:00:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3485 states and 12465 transitions. [2021-06-05 17:00:05,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:05,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:05,441 INFO L521 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] [2021-06-05 17:00:05,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 17:00:05,641 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:05,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:05,642 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-06-05 17:00:05,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:05,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687273014] [2021-06-05 17:00:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:05,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:05,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687273014] [2021-06-05 17:00:05,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687273014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:05,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161738442] [2021-06-05 17:00:05,679 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 [2021-06-05 17:00:05,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:05,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:05,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:05,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:05,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161738442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:05,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:05,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:00:05,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563444623] [2021-06-05 17:00:05,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:05,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:05,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:05,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:05,808 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) [2021-06-05 17:00:06,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:06,949 INFO L93 Difference]: Finished difference Result 11702 states and 38583 transitions. [2021-06-05 17:00:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:00:06,949 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 [2021-06-05 17:00:06,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:06,969 INFO L225 Difference]: With dead ends: 11702 [2021-06-05 17:00:06,998 INFO L226 Difference]: Without dead ends: 11702 [2021-06-05 17:00:06,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 640.1ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:00:07,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11702 states. [2021-06-05 17:00:07,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11702 to 3776. [2021-06-05 17:00:07,112 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) [2021-06-05 17:00:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3776 states to 3776 states and 13818 transitions. [2021-06-05 17:00:07,120 INFO L78 Accepts]: Start accepts. Automaton has 3776 states and 13818 transitions. Word has length 28 [2021-06-05 17:00:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:07,121 INFO L482 AbstractCegarLoop]: Abstraction has 3776 states and 13818 transitions. [2021-06-05 17:00:07,121 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) [2021-06-05 17:00:07,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3776 states and 13818 transitions. [2021-06-05 17:00:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:07,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:07,127 INFO L521 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] [2021-06-05 17:00:07,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 17:00:07,328 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:07,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:07,328 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-06-05 17:00:07,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:07,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681804658] [2021-06-05 17:00:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:07,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:07,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681804658] [2021-06-05 17:00:07,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681804658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:07,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221742686] [2021-06-05 17:00:07,369 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 [2021-06-05 17:00:07,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:00:07,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:07,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:07,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:07,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221742686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:07,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:07,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:00:07,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738284916] [2021-06-05 17:00:07,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:07,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:07,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:07,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:07,490 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) [2021-06-05 17:00:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:08,568 INFO L93 Difference]: Finished difference Result 11394 states and 37759 transitions. [2021-06-05 17:00:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:00:08,569 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 [2021-06-05 17:00:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:08,588 INFO L225 Difference]: With dead ends: 11394 [2021-06-05 17:00:08,589 INFO L226 Difference]: Without dead ends: 11394 [2021-06-05 17:00:08,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 621.8ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:00:08,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11394 states. [2021-06-05 17:00:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11394 to 3727. [2021-06-05 17:00:08,726 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) [2021-06-05 17:00:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 13563 transitions. [2021-06-05 17:00:08,736 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 13563 transitions. Word has length 28 [2021-06-05 17:00:08,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:08,736 INFO L482 AbstractCegarLoop]: Abstraction has 3727 states and 13563 transitions. [2021-06-05 17:00:08,736 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) [2021-06-05 17:00:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 13563 transitions. [2021-06-05 17:00:08,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:08,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:08,742 INFO L521 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] [2021-06-05 17:00:08,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:08,942 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:08,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:08,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-06-05 17:00:08,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:08,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606604478] [2021-06-05 17:00:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:08,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:08,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606604478] [2021-06-05 17:00:08,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606604478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:08,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309705290] [2021-06-05 17:00:08,983 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 [2021-06-05 17:00:09,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:09,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:09,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:09,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:09,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309705290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:09,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:09,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:00:09,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090628785] [2021-06-05 17:00:09,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:09,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:09,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:09,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:09,107 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) [2021-06-05 17:00:09,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:09,999 INFO L93 Difference]: Finished difference Result 10677 states and 34212 transitions. [2021-06-05 17:00:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 17:00:09,999 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 [2021-06-05 17:00:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:10,017 INFO L225 Difference]: With dead ends: 10677 [2021-06-05 17:00:10,018 INFO L226 Difference]: Without dead ends: 10677 [2021-06-05 17:00:10,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 507.6ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:00:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2021-06-05 17:00:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 3767. [2021-06-05 17:00:10,166 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) [2021-06-05 17:00:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 13725 transitions. [2021-06-05 17:00:10,174 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 13725 transitions. Word has length 28 [2021-06-05 17:00:10,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:10,174 INFO L482 AbstractCegarLoop]: Abstraction has 3767 states and 13725 transitions. [2021-06-05 17:00:10,175 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) [2021-06-05 17:00:10,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 13725 transitions. [2021-06-05 17:00:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:10,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:10,180 INFO L521 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] [2021-06-05 17:00:10,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:10,381 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:10,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-06-05 17:00:10,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:10,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366006137] [2021-06-05 17:00:10,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:10,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:10,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366006137] [2021-06-05 17:00:10,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366006137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:10,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581998624] [2021-06-05 17:00:10,417 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 [2021-06-05 17:00:10,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:00:10,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:10,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:10,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581998624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:10,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:10,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:00:10,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279827837] [2021-06-05 17:00:10,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:10,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:10,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:10,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:10,528 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) [2021-06-05 17:00:11,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:11,391 INFO L93 Difference]: Finished difference Result 10058 states and 32692 transitions. [2021-06-05 17:00:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 17:00:11,392 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 [2021-06-05 17:00:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:11,409 INFO L225 Difference]: With dead ends: 10058 [2021-06-05 17:00:11,409 INFO L226 Difference]: Without dead ends: 10050 [2021-06-05 17:00:11,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 481.1ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:00:11,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10050 states. [2021-06-05 17:00:11,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10050 to 3733. [2021-06-05 17:00:11,514 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) [2021-06-05 17:00:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 13582 transitions. [2021-06-05 17:00:11,522 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 13582 transitions. Word has length 28 [2021-06-05 17:00:11,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:11,522 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 13582 transitions. [2021-06-05 17:00:11,522 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) [2021-06-05 17:00:11,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 13582 transitions. [2021-06-05 17:00:11,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:11,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:11,527 INFO L521 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] [2021-06-05 17:00:11,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:11,727 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:11,727 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-06-05 17:00:11,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:11,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763065649] [2021-06-05 17:00:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:11,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:11,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763065649] [2021-06-05 17:00:11,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763065649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:11,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189694629] [2021-06-05 17:00:11,769 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 [2021-06-05 17:00:11,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:00:11,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:11,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:11,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189694629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:11,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:11,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:00:11,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49199042] [2021-06-05 17:00:11,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:11,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:11,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:11,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:11,892 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) [2021-06-05 17:00:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:12,864 INFO L93 Difference]: Finished difference Result 9657 states and 31573 transitions. [2021-06-05 17:00:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 17:00:12,864 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 [2021-06-05 17:00:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:12,880 INFO L225 Difference]: With dead ends: 9657 [2021-06-05 17:00:12,881 INFO L226 Difference]: Without dead ends: 9657 [2021-06-05 17:00:12,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 541.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:00:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9657 states. [2021-06-05 17:00:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9657 to 3749. [2021-06-05 17:00:12,980 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) [2021-06-05 17:00:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 13646 transitions. [2021-06-05 17:00:12,988 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 13646 transitions. Word has length 28 [2021-06-05 17:00:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:12,988 INFO L482 AbstractCegarLoop]: Abstraction has 3749 states and 13646 transitions. [2021-06-05 17:00:12,988 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) [2021-06-05 17:00:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 13646 transitions. [2021-06-05 17:00:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:12,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:12,994 INFO L521 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] [2021-06-05 17:00:13,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 17:00:13,194 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-06-05 17:00:13,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:13,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245624875] [2021-06-05 17:00:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:13,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:13,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245624875] [2021-06-05 17:00:13,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245624875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:13,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432675607] [2021-06-05 17:00:13,228 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 [2021-06-05 17:00:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:13,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:13,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432675607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:13,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:13,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:00:13,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381921497] [2021-06-05 17:00:13,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:13,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:13,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:13,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:13,339 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) [2021-06-05 17:00:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:14,264 INFO L93 Difference]: Finished difference Result 9322 states and 30778 transitions. [2021-06-05 17:00:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:00:14,264 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 [2021-06-05 17:00:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:14,279 INFO L225 Difference]: With dead ends: 9322 [2021-06-05 17:00:14,279 INFO L226 Difference]: Without dead ends: 9314 [2021-06-05 17:00:14,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 528.0ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:00:14,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9314 states. [2021-06-05 17:00:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9314 to 3417. [2021-06-05 17:00:14,369 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) [2021-06-05 17:00:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 12138 transitions. [2021-06-05 17:00:14,376 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 12138 transitions. Word has length 28 [2021-06-05 17:00:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:14,376 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 12138 transitions. [2021-06-05 17:00:14,376 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) [2021-06-05 17:00:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 12138 transitions. [2021-06-05 17:00:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:14,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:14,381 INFO L521 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] [2021-06-05 17:00:14,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 17:00:14,581 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:14,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-06-05 17:00:14,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:14,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58522906] [2021-06-05 17:00:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:14,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:14,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58522906] [2021-06-05 17:00:14,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58522906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:14,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527569264] [2021-06-05 17:00:14,616 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 [2021-06-05 17:00:14,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:14,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:14,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:14,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:14,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527569264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:14,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:14,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:00:14,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840827114] [2021-06-05 17:00:14,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:14,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:14,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:14,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:14,734 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) [2021-06-05 17:00:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:15,616 INFO L93 Difference]: Finished difference Result 7074 states and 23087 transitions. [2021-06-05 17:00:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:00:15,616 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 [2021-06-05 17:00:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:15,628 INFO L225 Difference]: With dead ends: 7074 [2021-06-05 17:00:15,628 INFO L226 Difference]: Without dead ends: 7074 [2021-06-05 17:00:15,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 511.0ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:00:15,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7074 states. [2021-06-05 17:00:15,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7074 to 3429. [2021-06-05 17:00:15,700 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) [2021-06-05 17:00:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12176 transitions. [2021-06-05 17:00:15,708 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12176 transitions. Word has length 28 [2021-06-05 17:00:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:15,708 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 12176 transitions. [2021-06-05 17:00:15,708 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) [2021-06-05 17:00:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12176 transitions. [2021-06-05 17:00:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:15,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:15,713 INFO L521 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] [2021-06-05 17:00:15,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 17:00:15,913 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:15,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-06-05 17:00:15,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:15,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471337571] [2021-06-05 17:00:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:15,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:15,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471337571] [2021-06-05 17:00:15,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471337571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:15,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720181305] [2021-06-05 17:00:15,972 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 [2021-06-05 17:00:15,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:00:15,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:15,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:15,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:16,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720181305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:16,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:16,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:00:16,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301667311] [2021-06-05 17:00:16,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:16,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:16,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:16,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:16,102 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) [2021-06-05 17:00:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:17,208 INFO L93 Difference]: Finished difference Result 8002 states and 25476 transitions. [2021-06-05 17:00:17,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:00:17,209 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 [2021-06-05 17:00:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:17,222 INFO L225 Difference]: With dead ends: 8002 [2021-06-05 17:00:17,222 INFO L226 Difference]: Without dead ends: 8002 [2021-06-05 17:00:17,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 672.6ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 17:00:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2021-06-05 17:00:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 3495. [2021-06-05 17:00:17,311 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) [2021-06-05 17:00:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 12393 transitions. [2021-06-05 17:00:17,319 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 12393 transitions. Word has length 28 [2021-06-05 17:00:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:17,319 INFO L482 AbstractCegarLoop]: Abstraction has 3495 states and 12393 transitions. [2021-06-05 17:00:17,319 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) [2021-06-05 17:00:17,319 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 12393 transitions. [2021-06-05 17:00:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:17,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:17,324 INFO L521 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] [2021-06-05 17:00:17,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 17:00:17,525 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:17,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:17,525 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-06-05 17:00:17,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:17,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508694976] [2021-06-05 17:00:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:17,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:17,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508694976] [2021-06-05 17:00:17,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508694976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:17,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367973269] [2021-06-05 17:00:17,559 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 [2021-06-05 17:00:17,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:17,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:17,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:17,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:17,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367973269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:17,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:17,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:00:17,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186192689] [2021-06-05 17:00:17,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:17,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:17,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:17,684 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) [2021-06-05 17:00:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:18,724 INFO L93 Difference]: Finished difference Result 7385 states and 23848 transitions. [2021-06-05 17:00:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:00:18,724 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 [2021-06-05 17:00:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:18,736 INFO L225 Difference]: With dead ends: 7385 [2021-06-05 17:00:18,736 INFO L226 Difference]: Without dead ends: 7381 [2021-06-05 17:00:18,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 658.9ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:00:18,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2021-06-05 17:00:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 3430. [2021-06-05 17:00:18,810 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) [2021-06-05 17:00:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 12154 transitions. [2021-06-05 17:00:18,817 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 12154 transitions. Word has length 28 [2021-06-05 17:00:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:18,817 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 12154 transitions. [2021-06-05 17:00:18,817 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) [2021-06-05 17:00:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 12154 transitions. [2021-06-05 17:00:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:18,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:18,821 INFO L521 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] [2021-06-05 17:00:19,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:19,022 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:19,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:19,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 72 times [2021-06-05 17:00:19,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:19,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693618770] [2021-06-05 17:00:19,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:19,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:19,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693618770] [2021-06-05 17:00:19,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693618770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:19,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204503577] [2021-06-05 17:00:19,070 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 [2021-06-05 17:00:19,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:00:19,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:19,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:19,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204503577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:19,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:19,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:00:19,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048987983] [2021-06-05 17:00:19,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:19,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:19,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:19,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:19,188 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) [2021-06-05 17:00:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:19,744 INFO L93 Difference]: Finished difference Result 6528 states and 21436 transitions. [2021-06-05 17:00:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:00:19,744 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 [2021-06-05 17:00:19,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:19,754 INFO L225 Difference]: With dead ends: 6528 [2021-06-05 17:00:19,755 INFO L226 Difference]: Without dead ends: 6528 [2021-06-05 17:00:19,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 335.9ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:00:19,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-06-05 17:00:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 3434. [2021-06-05 17:00:19,816 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) [2021-06-05 17:00:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 12174 transitions. [2021-06-05 17:00:19,822 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 12174 transitions. Word has length 28 [2021-06-05 17:00:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:19,823 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 12174 transitions. [2021-06-05 17:00:19,823 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) [2021-06-05 17:00:19,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 12174 transitions. [2021-06-05 17:00:19,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:19,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:19,827 INFO L521 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] [2021-06-05 17:00:20,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 17:00:20,028 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:20,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:20,028 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 73 times [2021-06-05 17:00:20,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:20,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468820266] [2021-06-05 17:00:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:20,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468820266] [2021-06-05 17:00:20,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468820266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397173185] [2021-06-05 17:00:20,068 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 [2021-06-05 17:00:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:20,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:20,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397173185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:20,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:20,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:00:20,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242768561] [2021-06-05 17:00:20,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:20,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:20,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:20,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:20,193 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) [2021-06-05 17:00:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:20,952 INFO L93 Difference]: Finished difference Result 6993 states and 22735 transitions. [2021-06-05 17:00:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:00:20,953 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 [2021-06-05 17:00:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:20,963 INFO L225 Difference]: With dead ends: 6993 [2021-06-05 17:00:20,963 INFO L226 Difference]: Without dead ends: 6993 [2021-06-05 17:00:20,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:00:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6993 states. [2021-06-05 17:00:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6993 to 3448. [2021-06-05 17:00:21,035 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) [2021-06-05 17:00:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 12215 transitions. [2021-06-05 17:00:21,042 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 12215 transitions. Word has length 28 [2021-06-05 17:00:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:21,042 INFO L482 AbstractCegarLoop]: Abstraction has 3448 states and 12215 transitions. [2021-06-05 17:00:21,042 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) [2021-06-05 17:00:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 12215 transitions. [2021-06-05 17:00:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:21,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:21,047 INFO L521 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] [2021-06-05 17:00:21,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:21,247 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:21,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:21,247 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 74 times [2021-06-05 17:00:21,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:21,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870874089] [2021-06-05 17:00:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:21,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:21,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870874089] [2021-06-05 17:00:21,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870874089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:21,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812706092] [2021-06-05 17:00:21,303 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 [2021-06-05 17:00:21,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:21,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:21,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:21,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:21,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812706092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:21,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:21,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:00:21,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145986828] [2021-06-05 17:00:21,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:21,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:21,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:21,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:21,415 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) [2021-06-05 17:00:22,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:22,244 INFO L93 Difference]: Finished difference Result 7512 states and 24206 transitions. [2021-06-05 17:00:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 17:00:22,244 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 [2021-06-05 17:00:22,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:22,256 INFO L225 Difference]: With dead ends: 7512 [2021-06-05 17:00:22,257 INFO L226 Difference]: Without dead ends: 7512 [2021-06-05 17:00:22,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 510.3ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:00:22,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7512 states. [2021-06-05 17:00:22,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7512 to 3530. [2021-06-05 17:00:22,340 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) [2021-06-05 17:00:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3530 states to 3530 states and 12484 transitions. [2021-06-05 17:00:22,348 INFO L78 Accepts]: Start accepts. Automaton has 3530 states and 12484 transitions. Word has length 28 [2021-06-05 17:00:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:22,348 INFO L482 AbstractCegarLoop]: Abstraction has 3530 states and 12484 transitions. [2021-06-05 17:00:22,348 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) [2021-06-05 17:00:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3530 states and 12484 transitions. [2021-06-05 17:00:22,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:22,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:22,353 INFO L521 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] [2021-06-05 17:00:22,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 17:00:22,553 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 75 times [2021-06-05 17:00:22,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:22,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004016486] [2021-06-05 17:00:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:22,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:22,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004016486] [2021-06-05 17:00:22,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004016486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:22,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878903396] [2021-06-05 17:00:22,587 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 [2021-06-05 17:00:22,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:00:22,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:22,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:22,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:22,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878903396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:22,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:22,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 17:00:22,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559512263] [2021-06-05 17:00:22,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:22,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:22,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:22,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:22,731 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) [2021-06-05 17:00:23,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:23,254 INFO L93 Difference]: Finished difference Result 7330 states and 25000 transitions. [2021-06-05 17:00:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:00:23,254 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 [2021-06-05 17:00:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:23,266 INFO L225 Difference]: With dead ends: 7330 [2021-06-05 17:00:23,266 INFO L226 Difference]: Without dead ends: 7330 [2021-06-05 17:00:23,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:00:23,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-06-05 17:00:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 4693. [2021-06-05 17:00:23,346 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) [2021-06-05 17:00:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 17163 transitions. [2021-06-05 17:00:23,356 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 17163 transitions. Word has length 28 [2021-06-05 17:00:23,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:23,356 INFO L482 AbstractCegarLoop]: Abstraction has 4693 states and 17163 transitions. [2021-06-05 17:00:23,356 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) [2021-06-05 17:00:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 17163 transitions. [2021-06-05 17:00:23,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:23,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:23,362 INFO L521 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] [2021-06-05 17:00:23,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:23,563 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:23,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:23,563 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 76 times [2021-06-05 17:00:23,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:23,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399745675] [2021-06-05 17:00:23,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:23,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:23,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399745675] [2021-06-05 17:00:23,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399745675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:23,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084094760] [2021-06-05 17:00:23,603 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 [2021-06-05 17:00:23,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:23,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:23,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:23,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:23,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084094760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:23,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:23,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:00:23,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183698665] [2021-06-05 17:00:23,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:23,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:23,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:23,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:23,696 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) [2021-06-05 17:00:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:24,509 INFO L93 Difference]: Finished difference Result 8462 states and 28895 transitions. [2021-06-05 17:00:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:00:24,509 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 [2021-06-05 17:00:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:24,527 INFO L225 Difference]: With dead ends: 8462 [2021-06-05 17:00:24,527 INFO L226 Difference]: Without dead ends: 8458 [2021-06-05 17:00:24,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 450.2ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:00:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8458 states. [2021-06-05 17:00:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8458 to 4583. [2021-06-05 17:00:24,636 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) [2021-06-05 17:00:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 16808 transitions. [2021-06-05 17:00:24,649 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 16808 transitions. Word has length 28 [2021-06-05 17:00:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:24,649 INFO L482 AbstractCegarLoop]: Abstraction has 4583 states and 16808 transitions. [2021-06-05 17:00:24,680 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) [2021-06-05 17:00:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 16808 transitions. [2021-06-05 17:00:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:24,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:24,687 INFO L521 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] [2021-06-05 17:00:24,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable351 [2021-06-05 17:00:24,887 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:24,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-06-05 17:00:24,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:24,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266366933] [2021-06-05 17:00:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:24,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:24,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266366933] [2021-06-05 17:00:24,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266366933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:24,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978143616] [2021-06-05 17:00:24,931 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 [2021-06-05 17:00:24,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:00:24,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:24,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:24,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:25,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978143616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:25,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:25,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:00:25,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820433863] [2021-06-05 17:00:25,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:25,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:25,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:25,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:25,040 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) [2021-06-05 17:00:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:25,875 INFO L93 Difference]: Finished difference Result 9599 states and 32446 transitions. [2021-06-05 17:00:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:00:25,875 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 [2021-06-05 17:00:25,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:25,891 INFO L225 Difference]: With dead ends: 9599 [2021-06-05 17:00:25,891 INFO L226 Difference]: Without dead ends: 9587 [2021-06-05 17:00:25,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 472.0ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:00:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9587 states. [2021-06-05 17:00:25,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9587 to 5054. [2021-06-05 17:00:25,990 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) [2021-06-05 17:00:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5054 states to 5054 states and 18960 transitions. [2021-06-05 17:00:26,001 INFO L78 Accepts]: Start accepts. Automaton has 5054 states and 18960 transitions. Word has length 28 [2021-06-05 17:00:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:26,001 INFO L482 AbstractCegarLoop]: Abstraction has 5054 states and 18960 transitions. [2021-06-05 17:00:26,002 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) [2021-06-05 17:00:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 5054 states and 18960 transitions. [2021-06-05 17:00:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:26,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:26,009 INFO L521 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] [2021-06-05 17:00:26,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:26,209 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:26,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-06-05 17:00:26,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:26,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490442639] [2021-06-05 17:00:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:26,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:26,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490442639] [2021-06-05 17:00:26,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490442639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:26,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495648217] [2021-06-05 17:00:26,237 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 [2021-06-05 17:00:26,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:26,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:26,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:26,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:26,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495648217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:26,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:26,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:00:26,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489130759] [2021-06-05 17:00:26,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:26,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:26,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:26,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:26,347 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) [2021-06-05 17:00:27,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:27,159 INFO L93 Difference]: Finished difference Result 9931 states and 33478 transitions. [2021-06-05 17:00:27,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:00:27,159 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 [2021-06-05 17:00:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:27,176 INFO L225 Difference]: With dead ends: 9931 [2021-06-05 17:00:27,176 INFO L226 Difference]: Without dead ends: 9931 [2021-06-05 17:00:27,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:00:27,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9931 states. [2021-06-05 17:00:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9931 to 5074. [2021-06-05 17:00:27,281 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) [2021-06-05 17:00:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5074 states to 5074 states and 18959 transitions. [2021-06-05 17:00:27,293 INFO L78 Accepts]: Start accepts. Automaton has 5074 states and 18959 transitions. Word has length 28 [2021-06-05 17:00:27,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:27,293 INFO L482 AbstractCegarLoop]: Abstraction has 5074 states and 18959 transitions. [2021-06-05 17:00:27,293 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) [2021-06-05 17:00:27,293 INFO L276 IsEmpty]: Start isEmpty. Operand 5074 states and 18959 transitions. [2021-06-05 17:00:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:27,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:27,300 INFO L521 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] [2021-06-05 17:00:27,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 17:00:27,503 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:27,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:27,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-06-05 17:00:27,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:27,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644002091] [2021-06-05 17:00:27,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:27,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:27,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644002091] [2021-06-05 17:00:27,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644002091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:27,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869412704] [2021-06-05 17:00:27,535 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 [2021-06-05 17:00:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:27,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:27,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:27,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869412704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:27,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:27,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:00:27,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795380799] [2021-06-05 17:00:27,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:00:27,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:27,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:00:27,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:00:27,618 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) [2021-06-05 17:00:28,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:28,011 INFO L93 Difference]: Finished difference Result 9404 states and 33475 transitions. [2021-06-05 17:00:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:00:28,012 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 [2021-06-05 17:00:28,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:28,027 INFO L225 Difference]: With dead ends: 9404 [2021-06-05 17:00:28,027 INFO L226 Difference]: Without dead ends: 9321 [2021-06-05 17:00:28,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:00:28,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9321 states. [2021-06-05 17:00:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9321 to 6509. [2021-06-05 17:00:28,149 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) [2021-06-05 17:00:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 24635 transitions. [2021-06-05 17:00:28,167 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 24635 transitions. Word has length 28 [2021-06-05 17:00:28,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:28,167 INFO L482 AbstractCegarLoop]: Abstraction has 6509 states and 24635 transitions. [2021-06-05 17:00:28,167 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) [2021-06-05 17:00:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 24635 transitions. [2021-06-05 17:00:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:28,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:28,179 INFO L521 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] [2021-06-05 17:00:28,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:28,381 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:28,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-06-05 17:00:28,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:28,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778139957] [2021-06-05 17:00:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:00:28,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:28,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778139957] [2021-06-05 17:00:28,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778139957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:28,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623907267] [2021-06-05 17:00:28,429 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 [2021-06-05 17:00:28,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:28,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:28,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:00:28,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:00:28,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623907267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:28,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:28,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 17:00:28,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533660345] [2021-06-05 17:00:28,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:00:28,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:28,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:00:28,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:00:28,506 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) [2021-06-05 17:00:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:28,696 INFO L93 Difference]: Finished difference Result 8941 states and 31711 transitions. [2021-06-05 17:00:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:00:28,696 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 [2021-06-05 17:00:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:28,715 INFO L225 Difference]: With dead ends: 8941 [2021-06-05 17:00:28,715 INFO L226 Difference]: Without dead ends: 8941 [2021-06-05 17:00:28,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:00:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8941 states. [2021-06-05 17:00:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8941 to 6655. [2021-06-05 17:00:28,904 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) [2021-06-05 17:00:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6655 states to 6655 states and 25045 transitions. [2021-06-05 17:00:28,924 INFO L78 Accepts]: Start accepts. Automaton has 6655 states and 25045 transitions. Word has length 28 [2021-06-05 17:00:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:28,924 INFO L482 AbstractCegarLoop]: Abstraction has 6655 states and 25045 transitions. [2021-06-05 17:00:28,925 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) [2021-06-05 17:00:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 6655 states and 25045 transitions. [2021-06-05 17:00:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:28,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:28,937 INFO L521 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] [2021-06-05 17:00:29,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 17:00:29,145 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:29,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:29,146 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-06-05 17:00:29,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:29,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214001034] [2021-06-05 17:00:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:29,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:29,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214001034] [2021-06-05 17:00:29,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214001034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:29,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754155917] [2021-06-05 17:00:29,187 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 [2021-06-05 17:00:29,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:00:29,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:29,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:29,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754155917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:29,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:29,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:00:29,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409238240] [2021-06-05 17:00:29,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:29,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:29,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:29,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:29,277 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) [2021-06-05 17:00:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:29,966 INFO L93 Difference]: Finished difference Result 13667 states and 47756 transitions. [2021-06-05 17:00:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:00:29,966 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 [2021-06-05 17:00:29,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:29,992 INFO L225 Difference]: With dead ends: 13667 [2021-06-05 17:00:29,992 INFO L226 Difference]: Without dead ends: 13667 [2021-06-05 17:00:29,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 411.3ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:00:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13667 states. [2021-06-05 17:00:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13667 to 7331. [2021-06-05 17:00:30,161 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) [2021-06-05 17:00:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7331 states to 7331 states and 27720 transitions. [2021-06-05 17:00:30,178 INFO L78 Accepts]: Start accepts. Automaton has 7331 states and 27720 transitions. Word has length 28 [2021-06-05 17:00:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:30,178 INFO L482 AbstractCegarLoop]: Abstraction has 7331 states and 27720 transitions. [2021-06-05 17:00:30,178 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) [2021-06-05 17:00:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 7331 states and 27720 transitions. [2021-06-05 17:00:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:30,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:30,190 INFO L521 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] [2021-06-05 17:00:30,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 17:00:30,391 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:30,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:30,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-06-05 17:00:30,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:30,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790220449] [2021-06-05 17:00:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:30,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:30,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790220449] [2021-06-05 17:00:30,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790220449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:30,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777673711] [2021-06-05 17:00:30,430 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 [2021-06-05 17:00:30,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:30,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:30,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:30,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:30,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777673711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:30,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:30,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 17:00:30,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407164053] [2021-06-05 17:00:30,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:00:30,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:30,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:00:30,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:00:30,516 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) [2021-06-05 17:00:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:31,195 INFO L93 Difference]: Finished difference Result 13813 states and 48320 transitions. [2021-06-05 17:00:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:00:31,195 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 [2021-06-05 17:00:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:31,220 INFO L225 Difference]: With dead ends: 13813 [2021-06-05 17:00:31,220 INFO L226 Difference]: Without dead ends: 13813 [2021-06-05 17:00:31,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:00:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13813 states. [2021-06-05 17:00:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13813 to 7615. [2021-06-05 17:00:31,387 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) [2021-06-05 17:00:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7615 states to 7615 states and 28616 transitions. [2021-06-05 17:00:31,405 INFO L78 Accepts]: Start accepts. Automaton has 7615 states and 28616 transitions. Word has length 28 [2021-06-05 17:00:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:31,405 INFO L482 AbstractCegarLoop]: Abstraction has 7615 states and 28616 transitions. [2021-06-05 17:00:31,405 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) [2021-06-05 17:00:31,405 INFO L276 IsEmpty]: Start isEmpty. Operand 7615 states and 28616 transitions. [2021-06-05 17:00:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:31,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:31,416 INFO L521 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] [2021-06-05 17:00:31,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 17:00:31,617 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:31,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:31,617 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-06-05 17:00:31,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:31,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952733930] [2021-06-05 17:00:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:31,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:31,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952733930] [2021-06-05 17:00:31,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952733930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:31,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897949214] [2021-06-05 17:00:31,644 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 [2021-06-05 17:00:31,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:00:31,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:31,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:31,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:31,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897949214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:31,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:31,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:00:31,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773759382] [2021-06-05 17:00:31,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:00:31,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:31,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:00:31,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:00:31,727 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) [2021-06-05 17:00:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:32,065 INFO L93 Difference]: Finished difference Result 10157 states and 36733 transitions. [2021-06-05 17:00:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:00:32,065 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 [2021-06-05 17:00:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:32,084 INFO L225 Difference]: With dead ends: 10157 [2021-06-05 17:00:32,084 INFO L226 Difference]: Without dead ends: 10127 [2021-06-05 17:00:32,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:00:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10127 states. [2021-06-05 17:00:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10127 to 8471. [2021-06-05 17:00:32,223 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) [2021-06-05 17:00:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 32021 transitions. [2021-06-05 17:00:32,242 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 32021 transitions. Word has length 28 [2021-06-05 17:00:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:32,243 INFO L482 AbstractCegarLoop]: Abstraction has 8471 states and 32021 transitions. [2021-06-05 17:00:32,243 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) [2021-06-05 17:00:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 32021 transitions. [2021-06-05 17:00:32,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:32,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:32,255 INFO L521 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] [2021-06-05 17:00:32,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:32,456 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:32,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-06-05 17:00:32,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:32,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020931947] [2021-06-05 17:00:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:00:32,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:32,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020931947] [2021-06-05 17:00:32,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020931947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:32,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107250358] [2021-06-05 17:00:32,483 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 [2021-06-05 17:00:32,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:00:32,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:32,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:32,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:00:32,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107250358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:32,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:32,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:00:32,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11622149] [2021-06-05 17:00:32,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:00:32,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:32,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:00:32,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:00:32,570 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) [2021-06-05 17:00:32,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:32,962 INFO L93 Difference]: Finished difference Result 10767 states and 38758 transitions. [2021-06-05 17:00:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:00:32,962 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 [2021-06-05 17:00:32,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:32,983 INFO L225 Difference]: With dead ends: 10767 [2021-06-05 17:00:32,983 INFO L226 Difference]: Without dead ends: 10767 [2021-06-05 17:00:32,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:00:32,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2021-06-05 17:00:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 8511. [2021-06-05 17:00:33,163 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) [2021-06-05 17:00:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8511 states to 8511 states and 32140 transitions. [2021-06-05 17:00:33,184 INFO L78 Accepts]: Start accepts. Automaton has 8511 states and 32140 transitions. Word has length 28 [2021-06-05 17:00:33,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:33,184 INFO L482 AbstractCegarLoop]: Abstraction has 8511 states and 32140 transitions. [2021-06-05 17:00:33,184 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) [2021-06-05 17:00:33,184 INFO L276 IsEmpty]: Start isEmpty. Operand 8511 states and 32140 transitions. [2021-06-05 17:00:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:33,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:33,197 INFO L521 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] [2021-06-05 17:00:33,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 17:00:33,398 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-06-05 17:00:33,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:33,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488520078] [2021-06-05 17:00:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:00:33,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:33,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488520078] [2021-06-05 17:00:33,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488520078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:33,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878897708] [2021-06-05 17:00:33,436 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 [2021-06-05 17:00:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:33,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:33,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:00:33,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878897708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:33,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:33,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 17:00:33,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24908881] [2021-06-05 17:00:33,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:00:33,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:33,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:00:33,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:00:33,518 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) [2021-06-05 17:00:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:34,152 INFO L93 Difference]: Finished difference Result 14516 states and 51666 transitions. [2021-06-05 17:00:34,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:00:34,153 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 [2021-06-05 17:00:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:34,182 INFO L225 Difference]: With dead ends: 14516 [2021-06-05 17:00:34,183 INFO L226 Difference]: Without dead ends: 14512 [2021-06-05 17:00:34,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:00:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2021-06-05 17:00:34,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 8415. [2021-06-05 17:00:34,371 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) [2021-06-05 17:00:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8415 states to 8415 states and 31808 transitions. [2021-06-05 17:00:34,392 INFO L78 Accepts]: Start accepts. Automaton has 8415 states and 31808 transitions. Word has length 28 [2021-06-05 17:00:34,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:34,392 INFO L482 AbstractCegarLoop]: Abstraction has 8415 states and 31808 transitions. [2021-06-05 17:00:34,392 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) [2021-06-05 17:00:34,392 INFO L276 IsEmpty]: Start isEmpty. Operand 8415 states and 31808 transitions. [2021-06-05 17:00:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:34,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:34,405 INFO L521 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] [2021-06-05 17:00:34,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:34,605 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-06-05 17:00:34,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:34,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842018835] [2021-06-05 17:00:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:34,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:34,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842018835] [2021-06-05 17:00:34,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842018835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:34,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436146738] [2021-06-05 17:00:34,640 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 [2021-06-05 17:00:34,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:34,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:34,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:34,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:34,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436146738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:34,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:34,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:00:34,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330830743] [2021-06-05 17:00:34,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:00:34,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:34,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:00:34,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:00:34,754 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) [2021-06-05 17:00:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:35,263 INFO L93 Difference]: Finished difference Result 10984 states and 39553 transitions. [2021-06-05 17:00:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:00:35,264 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 [2021-06-05 17:00:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:35,285 INFO L225 Difference]: With dead ends: 10984 [2021-06-05 17:00:35,285 INFO L226 Difference]: Without dead ends: 10984 [2021-06-05 17:00:35,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 303.5ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:00:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2021-06-05 17:00:35,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 8331. [2021-06-05 17:00:35,435 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) [2021-06-05 17:00:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31446 transitions. [2021-06-05 17:00:35,455 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31446 transitions. Word has length 28 [2021-06-05 17:00:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:35,456 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31446 transitions. [2021-06-05 17:00:35,456 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) [2021-06-05 17:00:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31446 transitions. [2021-06-05 17:00:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:35,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:35,468 INFO L521 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] [2021-06-05 17:00:35,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:35,669 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:35,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:35,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-06-05 17:00:35,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:35,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197436456] [2021-06-05 17:00:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:35,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:35,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197436456] [2021-06-05 17:00:35,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197436456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:35,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804580256] [2021-06-05 17:00:35,712 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 [2021-06-05 17:00:35,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:00:35,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:35,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:35,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:35,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804580256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:35,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:35,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:00:35,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064402028] [2021-06-05 17:00:35,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:35,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:35,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:35,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:35,796 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) [2021-06-05 17:00:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:36,469 INFO L93 Difference]: Finished difference Result 14367 states and 51050 transitions. [2021-06-05 17:00:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:00:36,470 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 [2021-06-05 17:00:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:36,500 INFO L225 Difference]: With dead ends: 14367 [2021-06-05 17:00:36,501 INFO L226 Difference]: Without dead ends: 14355 [2021-06-05 17:00:36,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 369.8ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:00:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-06-05 17:00:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 8331. [2021-06-05 17:00:36,681 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) [2021-06-05 17:00:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31438 transitions. [2021-06-05 17:00:36,701 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31438 transitions. Word has length 28 [2021-06-05 17:00:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:36,701 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31438 transitions. [2021-06-05 17:00:36,701 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) [2021-06-05 17:00:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31438 transitions. [2021-06-05 17:00:36,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:36,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:36,714 INFO L521 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] [2021-06-05 17:00:36,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:36,914 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:36,915 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-06-05 17:00:36,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:36,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109788965] [2021-06-05 17:00:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:36,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:36,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109788965] [2021-06-05 17:00:36,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109788965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:36,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040980076] [2021-06-05 17:00:36,955 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 [2021-06-05 17:00:36,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:36,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:36,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:36,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:37,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040980076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:37,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:37,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:00:37,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668857640] [2021-06-05 17:00:37,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:37,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:37,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:37,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:37,054 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) [2021-06-05 17:00:38,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:38,289 INFO L93 Difference]: Finished difference Result 22154 states and 77423 transitions. [2021-06-05 17:00:38,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 17:00:38,289 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 [2021-06-05 17:00:38,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:38,334 INFO L225 Difference]: With dead ends: 22154 [2021-06-05 17:00:38,335 INFO L226 Difference]: Without dead ends: 22154 [2021-06-05 17:00:38,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 734.9ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 17:00:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22154 states. [2021-06-05 17:00:38,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22154 to 11512. [2021-06-05 17:00:38,687 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) [2021-06-05 17:00:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11512 states to 11512 states and 43979 transitions. [2021-06-05 17:00:38,722 INFO L78 Accepts]: Start accepts. Automaton has 11512 states and 43979 transitions. Word has length 28 [2021-06-05 17:00:38,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:38,722 INFO L482 AbstractCegarLoop]: Abstraction has 11512 states and 43979 transitions. [2021-06-05 17:00:38,722 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) [2021-06-05 17:00:38,722 INFO L276 IsEmpty]: Start isEmpty. Operand 11512 states and 43979 transitions. [2021-06-05 17:00:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:38,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:38,741 INFO L521 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] [2021-06-05 17:00:38,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-06-05 17:00:38,942 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:38,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:38,942 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-06-05 17:00:38,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:38,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80917193] [2021-06-05 17:00:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:38,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:38,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80917193] [2021-06-05 17:00:38,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80917193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:38,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178314124] [2021-06-05 17:00:38,987 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 [2021-06-05 17:00:39,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:00:39,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:39,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:39,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:39,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178314124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:39,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:39,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:00:39,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704050518] [2021-06-05 17:00:39,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:39,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:39,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:39,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:39,079 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) [2021-06-05 17:00:40,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:40,219 INFO L93 Difference]: Finished difference Result 21281 states and 75167 transitions. [2021-06-05 17:00:40,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:00:40,219 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 [2021-06-05 17:00:40,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:40,264 INFO L225 Difference]: With dead ends: 21281 [2021-06-05 17:00:40,265 INFO L226 Difference]: Without dead ends: 21269 [2021-06-05 17:00:40,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:00:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21269 states. [2021-06-05 17:00:40,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21269 to 11342. [2021-06-05 17:00:40,605 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) [2021-06-05 17:00:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11342 states to 11342 states and 43386 transitions. [2021-06-05 17:00:40,635 INFO L78 Accepts]: Start accepts. Automaton has 11342 states and 43386 transitions. Word has length 28 [2021-06-05 17:00:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:40,635 INFO L482 AbstractCegarLoop]: Abstraction has 11342 states and 43386 transitions. [2021-06-05 17:00:40,635 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) [2021-06-05 17:00:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 11342 states and 43386 transitions. [2021-06-05 17:00:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:40,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:40,652 INFO L521 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] [2021-06-05 17:00:40,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:40,853 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:40,853 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-06-05 17:00:40,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:40,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799005655] [2021-06-05 17:00:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:40,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:40,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799005655] [2021-06-05 17:00:40,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799005655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:40,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76381307] [2021-06-05 17:00:40,893 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 [2021-06-05 17:00:40,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:00:40,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:40,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:40,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:40,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76381307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:40,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:40,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:00:40,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323810660] [2021-06-05 17:00:40,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:40,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:40,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:40,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:40,985 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) [2021-06-05 17:00:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:42,096 INFO L93 Difference]: Finished difference Result 21160 states and 74599 transitions. [2021-06-05 17:00:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:00:42,096 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 [2021-06-05 17:00:42,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:42,142 INFO L225 Difference]: With dead ends: 21160 [2021-06-05 17:00:42,142 INFO L226 Difference]: Without dead ends: 21124 [2021-06-05 17:00:42,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 582.7ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:00:42,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21124 states. [2021-06-05 17:00:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21124 to 11386. [2021-06-05 17:00:42,483 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) [2021-06-05 17:00:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11386 states to 11386 states and 43544 transitions. [2021-06-05 17:00:42,514 INFO L78 Accepts]: Start accepts. Automaton has 11386 states and 43544 transitions. Word has length 28 [2021-06-05 17:00:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:42,515 INFO L482 AbstractCegarLoop]: Abstraction has 11386 states and 43544 transitions. [2021-06-05 17:00:42,515 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) [2021-06-05 17:00:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 11386 states and 43544 transitions. [2021-06-05 17:00:42,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:42,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:42,532 INFO L521 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] [2021-06-05 17:00:42,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 17:00:42,733 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:42,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:42,733 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-06-05 17:00:42,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:42,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373993292] [2021-06-05 17:00:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:42,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:42,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373993292] [2021-06-05 17:00:42,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373993292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:42,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749143401] [2021-06-05 17:00:42,773 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 [2021-06-05 17:00:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:42,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:42,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:42,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749143401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:42,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:42,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:00:42,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220799822] [2021-06-05 17:00:42,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:42,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:42,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:42,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:42,890 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) [2021-06-05 17:00:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:44,328 INFO L93 Difference]: Finished difference Result 20907 states and 73951 transitions. [2021-06-05 17:00:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 17:00:44,328 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 [2021-06-05 17:00:44,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:44,448 INFO L225 Difference]: With dead ends: 20907 [2021-06-05 17:00:44,448 INFO L226 Difference]: Without dead ends: 20907 [2021-06-05 17:00:44,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 891.4ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:00:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20907 states. [2021-06-05 17:00:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20907 to 11582. [2021-06-05 17:00:44,718 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) [2021-06-05 17:00:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11582 states to 11582 states and 44194 transitions. [2021-06-05 17:00:44,747 INFO L78 Accepts]: Start accepts. Automaton has 11582 states and 44194 transitions. Word has length 28 [2021-06-05 17:00:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:44,748 INFO L482 AbstractCegarLoop]: Abstraction has 11582 states and 44194 transitions. [2021-06-05 17:00:44,748 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) [2021-06-05 17:00:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 11582 states and 44194 transitions. [2021-06-05 17:00:44,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:44,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:44,766 INFO L521 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] [2021-06-05 17:00:44,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 17:00:44,966 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:44,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-06-05 17:00:44,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:44,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528027397] [2021-06-05 17:00:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:45,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:45,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528027397] [2021-06-05 17:00:45,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528027397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:45,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583300170] [2021-06-05 17:00:45,026 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 [2021-06-05 17:00:45,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:45,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:45,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:45,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:45,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583300170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:45,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:45,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:00:45,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565463205] [2021-06-05 17:00:45,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:45,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:45,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:45,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:45,139 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) [2021-06-05 17:00:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:46,359 INFO L93 Difference]: Finished difference Result 20368 states and 72482 transitions. [2021-06-05 17:00:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:00:46,359 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 [2021-06-05 17:00:46,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:46,399 INFO L225 Difference]: With dead ends: 20368 [2021-06-05 17:00:46,399 INFO L226 Difference]: Without dead ends: 20356 [2021-06-05 17:00:46,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 750.5ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 17:00:46,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-06-05 17:00:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 11460. [2021-06-05 17:00:46,740 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) [2021-06-05 17:00:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11460 states to 11460 states and 43771 transitions. [2021-06-05 17:00:46,768 INFO L78 Accepts]: Start accepts. Automaton has 11460 states and 43771 transitions. Word has length 28 [2021-06-05 17:00:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:46,768 INFO L482 AbstractCegarLoop]: Abstraction has 11460 states and 43771 transitions. [2021-06-05 17:00:46,768 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) [2021-06-05 17:00:46,768 INFO L276 IsEmpty]: Start isEmpty. Operand 11460 states and 43771 transitions. [2021-06-05 17:00:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:46,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:46,786 INFO L521 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] [2021-06-05 17:00:46,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 17:00:46,987 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:46,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:46,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-06-05 17:00:46,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:46,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081655440] [2021-06-05 17:00:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:47,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:47,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081655440] [2021-06-05 17:00:47,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081655440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:47,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813465132] [2021-06-05 17:00:47,027 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 [2021-06-05 17:00:47,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 17:00:47,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:47,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:47,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:47,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813465132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:47,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:47,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 17:00:47,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140251937] [2021-06-05 17:00:47,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:47,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:47,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:47,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:47,127 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) [2021-06-05 17:00:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:48,170 INFO L93 Difference]: Finished difference Result 19606 states and 70387 transitions. [2021-06-05 17:00:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:00:48,170 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 [2021-06-05 17:00:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:48,212 INFO L225 Difference]: With dead ends: 19606 [2021-06-05 17:00:48,213 INFO L226 Difference]: Without dead ends: 19570 [2021-06-05 17:00:48,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:00:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19570 states. [2021-06-05 17:00:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19570 to 11484. [2021-06-05 17:00:48,511 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) [2021-06-05 17:00:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 43851 transitions. [2021-06-05 17:00:48,542 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 43851 transitions. Word has length 28 [2021-06-05 17:00:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:48,543 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 43851 transitions. [2021-06-05 17:00:48,543 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) [2021-06-05 17:00:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 43851 transitions. [2021-06-05 17:00:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:48,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:48,561 INFO L521 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] [2021-06-05 17:00:48,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 17:00:48,762 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:48,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-06-05 17:00:48,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:48,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595857752] [2021-06-05 17:00:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:00:48,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:48,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595857752] [2021-06-05 17:00:48,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595857752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:48,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983216220] [2021-06-05 17:00:48,799 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 [2021-06-05 17:00:48,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:48,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:48,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:48,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:48,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983216220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:48,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:48,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:00:48,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148331673] [2021-06-05 17:00:48,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:48,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:48,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:48,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:48,927 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) [2021-06-05 17:00:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:50,252 INFO L93 Difference]: Finished difference Result 28641 states and 102323 transitions. [2021-06-05 17:00:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 17:00:50,252 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 [2021-06-05 17:00:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:50,318 INFO L225 Difference]: With dead ends: 28641 [2021-06-05 17:00:50,318 INFO L226 Difference]: Without dead ends: 28641 [2021-06-05 17:00:50,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 768.0ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 17:00:50,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28641 states. [2021-06-05 17:00:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28641 to 11831. [2021-06-05 17:00:50,685 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) [2021-06-05 17:00:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11831 states to 11831 states and 45497 transitions. [2021-06-05 17:00:50,713 INFO L78 Accepts]: Start accepts. Automaton has 11831 states and 45497 transitions. Word has length 28 [2021-06-05 17:00:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:50,713 INFO L482 AbstractCegarLoop]: Abstraction has 11831 states and 45497 transitions. [2021-06-05 17:00:50,713 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) [2021-06-05 17:00:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 11831 states and 45497 transitions. [2021-06-05 17:00:50,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:50,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:50,731 INFO L521 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] [2021-06-05 17:00:50,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-05 17:00:50,931 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:50,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:50,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-06-05 17:00:50,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:50,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372951751] [2021-06-05 17:00:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:00:50,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:50,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372951751] [2021-06-05 17:00:50,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372951751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:50,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116382858] [2021-06-05 17:00:50,967 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 [2021-06-05 17:00:50,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:00:50,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:50,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:51,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116382858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:51,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:51,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:00:51,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763633333] [2021-06-05 17:00:51,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:51,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:51,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:51,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:51,095 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) [2021-06-05 17:00:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:52,422 INFO L93 Difference]: Finished difference Result 28095 states and 101100 transitions. [2021-06-05 17:00:52,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 17:00:52,422 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 [2021-06-05 17:00:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:52,494 INFO L225 Difference]: With dead ends: 28095 [2021-06-05 17:00:52,494 INFO L226 Difference]: Without dead ends: 28095 [2021-06-05 17:00:52,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 804.4ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 17:00:52,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28095 states. [2021-06-05 17:00:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28095 to 11720. [2021-06-05 17:00:52,906 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) [2021-06-05 17:00:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11720 states to 11720 states and 44921 transitions. [2021-06-05 17:00:52,937 INFO L78 Accepts]: Start accepts. Automaton has 11720 states and 44921 transitions. Word has length 28 [2021-06-05 17:00:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:52,938 INFO L482 AbstractCegarLoop]: Abstraction has 11720 states and 44921 transitions. [2021-06-05 17:00:52,938 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) [2021-06-05 17:00:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 11720 states and 44921 transitions. [2021-06-05 17:00:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:52,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:52,956 INFO L521 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] [2021-06-05 17:00:53,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-05 17:00:53,157 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-06-05 17:00:53,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:53,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347475652] [2021-06-05 17:00:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:00:53,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:53,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347475652] [2021-06-05 17:00:53,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347475652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:53,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308969473] [2021-06-05 17:00:53,217 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 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 [2021-06-05 17:00:53,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:00:53,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:53,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:53,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:53,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308969473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:53,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:53,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:00:53,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605663257] [2021-06-05 17:00:53,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:53,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:53,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:53,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:53,333 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) [2021-06-05 17:00:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:54,189 INFO L93 Difference]: Finished difference Result 22250 states and 80381 transitions. [2021-06-05 17:00:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:00:54,190 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 [2021-06-05 17:00:54,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:54,237 INFO L225 Difference]: With dead ends: 22250 [2021-06-05 17:00:54,237 INFO L226 Difference]: Without dead ends: 22250 [2021-06-05 17:00:54,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:00:54,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22250 states. [2021-06-05 17:00:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22250 to 11729. [2021-06-05 17:00:54,528 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) [2021-06-05 17:00:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11729 states to 11729 states and 44944 transitions. [2021-06-05 17:00:54,560 INFO L78 Accepts]: Start accepts. Automaton has 11729 states and 44944 transitions. Word has length 28 [2021-06-05 17:00:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:54,560 INFO L482 AbstractCegarLoop]: Abstraction has 11729 states and 44944 transitions. [2021-06-05 17:00:54,560 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) [2021-06-05 17:00:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 11729 states and 44944 transitions. [2021-06-05 17:00:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:54,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:54,579 INFO L521 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] [2021-06-05 17:00:54,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:54,779 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:54,780 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-06-05 17:00:54,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:54,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479073263] [2021-06-05 17:00:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:00:54,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:54,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479073263] [2021-06-05 17:00:54,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479073263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:54,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629885178] [2021-06-05 17:00:54,814 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 [2021-06-05 17:00:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:54,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:54,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:54,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629885178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:54,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:54,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:00:54,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474431133] [2021-06-05 17:00:54,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:54,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:54,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:54,928 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) [2021-06-05 17:00:55,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:55,739 INFO L93 Difference]: Finished difference Result 20609 states and 75141 transitions. [2021-06-05 17:00:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:00:55,740 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 [2021-06-05 17:00:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:55,780 INFO L225 Difference]: With dead ends: 20609 [2021-06-05 17:00:55,780 INFO L226 Difference]: Without dead ends: 20609 [2021-06-05 17:00:55,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 415.3ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:00:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20609 states. [2021-06-05 17:00:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20609 to 11741. [2021-06-05 17:00:56,059 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) [2021-06-05 17:00:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11741 states to 11741 states and 44982 transitions. [2021-06-05 17:00:56,089 INFO L78 Accepts]: Start accepts. Automaton has 11741 states and 44982 transitions. Word has length 28 [2021-06-05 17:00:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:56,089 INFO L482 AbstractCegarLoop]: Abstraction has 11741 states and 44982 transitions. [2021-06-05 17:00:56,090 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) [2021-06-05 17:00:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 11741 states and 44982 transitions. [2021-06-05 17:00:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:56,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:56,107 INFO L521 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] [2021-06-05 17:00:56,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:56,307 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:56,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:56,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-06-05 17:00:56,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:56,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401267176] [2021-06-05 17:00:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:00:56,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:56,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401267176] [2021-06-05 17:00:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401267176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:56,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042255300] [2021-06-05 17:00:56,342 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 [2021-06-05 17:00:56,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:56,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:56,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:56,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:56,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042255300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:56,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:56,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:00:56,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934870021] [2021-06-05 17:00:56,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:56,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:56,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:56,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:56,467 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) [2021-06-05 17:00:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:57,564 INFO L93 Difference]: Finished difference Result 21392 states and 77378 transitions. [2021-06-05 17:00:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 17:00:57,564 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 [2021-06-05 17:00:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:57,612 INFO L225 Difference]: With dead ends: 21392 [2021-06-05 17:00:57,612 INFO L226 Difference]: Without dead ends: 21392 [2021-06-05 17:00:57,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 17:00:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21392 states. [2021-06-05 17:00:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21392 to 11849. [2021-06-05 17:00:57,995 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) [2021-06-05 17:00:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11849 states to 11849 states and 45316 transitions. [2021-06-05 17:00:58,026 INFO L78 Accepts]: Start accepts. Automaton has 11849 states and 45316 transitions. Word has length 28 [2021-06-05 17:00:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:58,026 INFO L482 AbstractCegarLoop]: Abstraction has 11849 states and 45316 transitions. [2021-06-05 17:00:58,026 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) [2021-06-05 17:00:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 11849 states and 45316 transitions. [2021-06-05 17:00:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:58,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:58,044 INFO L521 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] [2021-06-05 17:00:58,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:58,244 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:58,245 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-06-05 17:00:58,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:58,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851014178] [2021-06-05 17:00:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:00:58,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:58,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851014178] [2021-06-05 17:00:58,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851014178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:58,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162618951] [2021-06-05 17:00:58,278 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 [2021-06-05 17:00:58,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 17:00:58,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:58,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:58,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:58,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162618951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:58,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:58,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:00:58,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702346157] [2021-06-05 17:00:58,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:58,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:58,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:58,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:58,399 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) [2021-06-05 17:00:59,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:59,321 INFO L93 Difference]: Finished difference Result 20773 states and 75674 transitions. [2021-06-05 17:00:59,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:00:59,321 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 [2021-06-05 17:00:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:59,364 INFO L225 Difference]: With dead ends: 20773 [2021-06-05 17:00:59,365 INFO L226 Difference]: Without dead ends: 20769 [2021-06-05 17:00:59,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 565.2ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:00:59,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20769 states. [2021-06-05 17:00:59,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20769 to 11775. [2021-06-05 17:00:59,666 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) [2021-06-05 17:00:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11775 states to 11775 states and 45077 transitions. [2021-06-05 17:00:59,698 INFO L78 Accepts]: Start accepts. Automaton has 11775 states and 45077 transitions. Word has length 28 [2021-06-05 17:00:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:59,698 INFO L482 AbstractCegarLoop]: Abstraction has 11775 states and 45077 transitions. [2021-06-05 17:00:59,698 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) [2021-06-05 17:00:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 11775 states and 45077 transitions. [2021-06-05 17:00:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:59,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:59,717 INFO L521 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] [2021-06-05 17:00:59,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:59,917 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-06-05 17:00:59,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:59,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282832640] [2021-06-05 17:00:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:59,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:59,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282832640] [2021-06-05 17:00:59,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282832640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:59,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147990793] [2021-06-05 17:00:59,958 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 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 [2021-06-05 17:00:59,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:59,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:59,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:59,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:00,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147990793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:00,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:00,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:01:00,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017626806] [2021-06-05 17:01:00,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:00,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:00,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:00,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:00,077 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) [2021-06-05 17:01:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:01,177 INFO L93 Difference]: Finished difference Result 20078 states and 72439 transitions. [2021-06-05 17:01:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:01:01,177 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 [2021-06-05 17:01:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:01,215 INFO L225 Difference]: With dead ends: 20078 [2021-06-05 17:01:01,215 INFO L226 Difference]: Without dead ends: 20078 [2021-06-05 17:01:01,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 655.7ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 17:01:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20078 states. [2021-06-05 17:01:01,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20078 to 12002. [2021-06-05 17:01:01,478 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) [2021-06-05 17:01:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12002 states to 12002 states and 45975 transitions. [2021-06-05 17:01:01,509 INFO L78 Accepts]: Start accepts. Automaton has 12002 states and 45975 transitions. Word has length 28 [2021-06-05 17:01:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:01,509 INFO L482 AbstractCegarLoop]: Abstraction has 12002 states and 45975 transitions. [2021-06-05 17:01:01,509 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) [2021-06-05 17:01:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 12002 states and 45975 transitions. [2021-06-05 17:01:01,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:01,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:01,527 INFO L521 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] [2021-06-05 17:01:01,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 17:01:01,728 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:01,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:01,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-06-05 17:01:01,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:01,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717703804] [2021-06-05 17:01:01,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:01,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:01,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717703804] [2021-06-05 17:01:01,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717703804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:01,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139644834] [2021-06-05 17:01:01,768 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 [2021-06-05 17:01:01,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 17:01:01,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:01,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:01,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139644834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:01,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:01,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:01:01,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976619284] [2021-06-05 17:01:01,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:01,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:01,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:01,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:01,879 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) [2021-06-05 17:01:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:02,830 INFO L93 Difference]: Finished difference Result 19609 states and 71148 transitions. [2021-06-05 17:01:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:01:02,831 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 [2021-06-05 17:01:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:02,875 INFO L225 Difference]: With dead ends: 19609 [2021-06-05 17:01:02,875 INFO L226 Difference]: Without dead ends: 19597 [2021-06-05 17:01:02,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 557.5ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:01:02,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19597 states. [2021-06-05 17:01:03,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19597 to 12104. [2021-06-05 17:01:03,152 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) [2021-06-05 17:01:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 46298 transitions. [2021-06-05 17:01:03,184 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 46298 transitions. Word has length 28 [2021-06-05 17:01:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:03,184 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 46298 transitions. [2021-06-05 17:01:03,184 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) [2021-06-05 17:01:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 46298 transitions. [2021-06-05 17:01:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:03,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:03,203 INFO L521 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] [2021-06-05 17:01:03,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 17:01:03,404 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:03,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 77 times [2021-06-05 17:01:03,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:03,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321268557] [2021-06-05 17:01:03,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:03,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:03,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321268557] [2021-06-05 17:01:03,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321268557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:03,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271359026] [2021-06-05 17:01:03,464 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 [2021-06-05 17:01:03,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:01:03,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:03,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:03,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:03,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271359026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:03,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:03,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:01:03,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673690307] [2021-06-05 17:01:03,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:03,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:03,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:03,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:03,557 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) [2021-06-05 17:01:04,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:04,063 INFO L93 Difference]: Finished difference Result 17019 states and 63218 transitions. [2021-06-05 17:01:04,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:01:04,063 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 [2021-06-05 17:01:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:04,097 INFO L225 Difference]: With dead ends: 17019 [2021-06-05 17:01:04,098 INFO L226 Difference]: Without dead ends: 17019 [2021-06-05 17:01:04,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:01:04,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17019 states. [2021-06-05 17:01:04,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17019 to 12176. [2021-06-05 17:01:04,325 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) [2021-06-05 17:01:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 46518 transitions. [2021-06-05 17:01:04,357 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 46518 transitions. Word has length 28 [2021-06-05 17:01:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:04,357 INFO L482 AbstractCegarLoop]: Abstraction has 12176 states and 46518 transitions. [2021-06-05 17:01:04,357 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) [2021-06-05 17:01:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 46518 transitions. [2021-06-05 17:01:04,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:04,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:04,376 INFO L521 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] [2021-06-05 17:01:04,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 17:01:04,576 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash 149924120, now seen corresponding path program 78 times [2021-06-05 17:01:04,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:04,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416954343] [2021-06-05 17:01:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:04,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:04,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416954343] [2021-06-05 17:01:04,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416954343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:04,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879920511] [2021-06-05 17:01:04,610 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 [2021-06-05 17:01:04,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:01:04,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:04,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:04,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:04,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879920511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:04,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:04,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 17:01:04,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238228053] [2021-06-05 17:01:04,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:04,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:04,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:04,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:04,727 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) [2021-06-05 17:01:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:05,160 INFO L93 Difference]: Finished difference Result 15313 states and 56647 transitions. [2021-06-05 17:01:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:01:05,160 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 [2021-06-05 17:01:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:05,194 INFO L225 Difference]: With dead ends: 15313 [2021-06-05 17:01:05,194 INFO L226 Difference]: Without dead ends: 15262 [2021-06-05 17:01:05,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:01:05,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15262 states. [2021-06-05 17:01:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15262 to 11819. [2021-06-05 17:01:05,407 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) [2021-06-05 17:01:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11819 states to 11819 states and 45054 transitions. [2021-06-05 17:01:05,438 INFO L78 Accepts]: Start accepts. Automaton has 11819 states and 45054 transitions. Word has length 28 [2021-06-05 17:01:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:05,438 INFO L482 AbstractCegarLoop]: Abstraction has 11819 states and 45054 transitions. [2021-06-05 17:01:05,438 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) [2021-06-05 17:01:05,438 INFO L276 IsEmpty]: Start isEmpty. Operand 11819 states and 45054 transitions. [2021-06-05 17:01:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:05,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:05,456 INFO L521 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] [2021-06-05 17:01:05,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 17:01:05,669 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:05,669 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 79 times [2021-06-05 17:01:05,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:05,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978482057] [2021-06-05 17:01:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:05,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:05,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978482057] [2021-06-05 17:01:05,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978482057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:05,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327017324] [2021-06-05 17:01:05,703 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 [2021-06-05 17:01:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:05,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:05,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327017324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:05,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:05,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:01:05,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804396987] [2021-06-05 17:01:05,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:01:05,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:05,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:01:05,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:01:05,790 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) [2021-06-05 17:01:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:06,308 INFO L93 Difference]: Finished difference Result 17677 states and 64654 transitions. [2021-06-05 17:01:06,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:01:06,308 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 [2021-06-05 17:01:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:06,344 INFO L225 Difference]: With dead ends: 17677 [2021-06-05 17:01:06,345 INFO L226 Difference]: Without dead ends: 17677 [2021-06-05 17:01:06,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:01:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17677 states. [2021-06-05 17:01:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17677 to 12133. [2021-06-05 17:01:06,664 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) [2021-06-05 17:01:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12133 states to 12133 states and 46051 transitions. [2021-06-05 17:01:06,703 INFO L78 Accepts]: Start accepts. Automaton has 12133 states and 46051 transitions. Word has length 28 [2021-06-05 17:01:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:06,703 INFO L482 AbstractCegarLoop]: Abstraction has 12133 states and 46051 transitions. [2021-06-05 17:01:06,703 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) [2021-06-05 17:01:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 12133 states and 46051 transitions. [2021-06-05 17:01:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:06,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:06,723 INFO L521 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] [2021-06-05 17:01:06,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:06,924 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:06,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:06,924 INFO L82 PathProgramCache]: Analyzing trace with hash -119803620, now seen corresponding path program 80 times [2021-06-05 17:01:06,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:06,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725228532] [2021-06-05 17:01:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:06,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:06,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725228532] [2021-06-05 17:01:06,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725228532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:06,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957142267] [2021-06-05 17:01:06,959 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 [2021-06-05 17:01:06,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:06,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:06,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:06,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:07,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957142267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:07,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:07,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 17:01:07,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563033246] [2021-06-05 17:01:07,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:07,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:07,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:07,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:07,092 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) [2021-06-05 17:01:07,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:07,649 INFO L93 Difference]: Finished difference Result 16906 states and 62799 transitions. [2021-06-05 17:01:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:01:07,650 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 [2021-06-05 17:01:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:07,689 INFO L225 Difference]: With dead ends: 16906 [2021-06-05 17:01:07,689 INFO L226 Difference]: Without dead ends: 16896 [2021-06-05 17:01:07,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:01:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16896 states. [2021-06-05 17:01:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16896 to 14164. [2021-06-05 17:01:07,997 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) [2021-06-05 17:01:08,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14164 states to 14164 states and 54256 transitions. [2021-06-05 17:01:08,036 INFO L78 Accepts]: Start accepts. Automaton has 14164 states and 54256 transitions. Word has length 28 [2021-06-05 17:01:08,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:08,036 INFO L482 AbstractCegarLoop]: Abstraction has 14164 states and 54256 transitions. [2021-06-05 17:01:08,036 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) [2021-06-05 17:01:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 14164 states and 54256 transitions. [2021-06-05 17:01:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:08,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:08,059 INFO L521 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] [2021-06-05 17:01:08,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 17:01:08,259 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:08,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:08,260 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 81 times [2021-06-05 17:01:08,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:08,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690122718] [2021-06-05 17:01:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:08,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:08,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690122718] [2021-06-05 17:01:08,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690122718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:08,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543601221] [2021-06-05 17:01:08,294 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 [2021-06-05 17:01:08,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 17:01:08,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:08,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:08,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:08,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543601221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:08,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:08,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:01:08,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288697952] [2021-06-05 17:01:08,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:01:08,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:08,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:01:08,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:01:08,376 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) [2021-06-05 17:01:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:08,810 INFO L93 Difference]: Finished difference Result 19420 states and 72451 transitions. [2021-06-05 17:01:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:01:08,811 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 [2021-06-05 17:01:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:08,852 INFO L225 Difference]: With dead ends: 19420 [2021-06-05 17:01:08,852 INFO L226 Difference]: Without dead ends: 19412 [2021-06-05 17:01:08,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:01:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19412 states. [2021-06-05 17:01:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19412 to 14084. [2021-06-05 17:01:09,153 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) [2021-06-05 17:01:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14084 states to 14084 states and 53988 transitions. [2021-06-05 17:01:09,200 INFO L78 Accepts]: Start accepts. Automaton has 14084 states and 53988 transitions. Word has length 28 [2021-06-05 17:01:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:09,200 INFO L482 AbstractCegarLoop]: Abstraction has 14084 states and 53988 transitions. [2021-06-05 17:01:09,200 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) [2021-06-05 17:01:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 14084 states and 53988 transitions. [2021-06-05 17:01:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:09,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:09,228 INFO L521 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] [2021-06-05 17:01:09,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:09,429 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 82 times [2021-06-05 17:01:09,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:09,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372063994] [2021-06-05 17:01:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:09,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:09,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372063994] [2021-06-05 17:01:09,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372063994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:09,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990144317] [2021-06-05 17:01:09,470 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 [2021-06-05 17:01:09,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:09,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:09,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:09,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:09,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990144317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:09,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:09,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:01:09,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332456136] [2021-06-05 17:01:09,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:09,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:09,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:09,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:09,552 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) [2021-06-05 17:01:10,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:10,027 INFO L93 Difference]: Finished difference Result 19300 states and 72099 transitions. [2021-06-05 17:01:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:01:10,027 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 [2021-06-05 17:01:10,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:10,068 INFO L225 Difference]: With dead ends: 19300 [2021-06-05 17:01:10,068 INFO L226 Difference]: Without dead ends: 19288 [2021-06-05 17:01:10,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:01:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19288 states. [2021-06-05 17:01:10,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19288 to 14050. [2021-06-05 17:01:10,405 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) [2021-06-05 17:01:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 53885 transitions. [2021-06-05 17:01:10,443 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 53885 transitions. Word has length 28 [2021-06-05 17:01:10,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:10,443 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 53885 transitions. [2021-06-05 17:01:10,443 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) [2021-06-05 17:01:10,443 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 53885 transitions. [2021-06-05 17:01:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:10,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:10,467 INFO L521 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] [2021-06-05 17:01:10,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:10,669 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:10,669 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 83 times [2021-06-05 17:01:10,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:10,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474830883] [2021-06-05 17:01:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:10,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:10,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474830883] [2021-06-05 17:01:10,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474830883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:10,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625680755] [2021-06-05 17:01:10,707 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 [2021-06-05 17:01:10,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:01:10,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:10,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:10,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:10,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625680755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:10,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:10,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:01:10,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511243714] [2021-06-05 17:01:10,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:01:10,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:10,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:01:10,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:01:10,823 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) [2021-06-05 17:01:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:11,783 INFO L93 Difference]: Finished difference Result 26192 states and 94663 transitions. [2021-06-05 17:01:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:01:11,783 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 [2021-06-05 17:01:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:11,845 INFO L225 Difference]: With dead ends: 26192 [2021-06-05 17:01:11,845 INFO L226 Difference]: Without dead ends: 26192 [2021-06-05 17:01:11,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:01:11,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26192 states. [2021-06-05 17:01:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26192 to 14026. [2021-06-05 17:01:12,190 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) [2021-06-05 17:01:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14026 states to 14026 states and 53781 transitions. [2021-06-05 17:01:12,229 INFO L78 Accepts]: Start accepts. Automaton has 14026 states and 53781 transitions. Word has length 28 [2021-06-05 17:01:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:12,229 INFO L482 AbstractCegarLoop]: Abstraction has 14026 states and 53781 transitions. [2021-06-05 17:01:12,229 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) [2021-06-05 17:01:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 14026 states and 53781 transitions. [2021-06-05 17:01:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:12,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:12,252 INFO L521 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] [2021-06-05 17:01:12,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:12,457 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-06-05 17:01:12,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:12,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979738563] [2021-06-05 17:01:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:12,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:12,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979738563] [2021-06-05 17:01:12,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979738563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:12,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531273084] [2021-06-05 17:01:12,484 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 [2021-06-05 17:01:12,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:01:12,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:12,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:12,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531273084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:12,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:12,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:01:12,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212987824] [2021-06-05 17:01:12,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:12,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:12,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:12,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:12,599 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) [2021-06-05 17:01:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:13,315 INFO L93 Difference]: Finished difference Result 21930 states and 80131 transitions. [2021-06-05 17:01:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:01:13,316 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 [2021-06-05 17:01:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:13,361 INFO L225 Difference]: With dead ends: 21930 [2021-06-05 17:01:13,361 INFO L226 Difference]: Without dead ends: 21917 [2021-06-05 17:01:13,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 367.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:01:13,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21917 states. [2021-06-05 17:01:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21917 to 15540. [2021-06-05 17:01:13,768 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) [2021-06-05 17:01:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15540 states to 15540 states and 60500 transitions. [2021-06-05 17:01:13,810 INFO L78 Accepts]: Start accepts. Automaton has 15540 states and 60500 transitions. Word has length 28 [2021-06-05 17:01:13,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:13,811 INFO L482 AbstractCegarLoop]: Abstraction has 15540 states and 60500 transitions. [2021-06-05 17:01:13,811 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) [2021-06-05 17:01:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 15540 states and 60500 transitions. [2021-06-05 17:01:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:13,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:13,835 INFO L521 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] [2021-06-05 17:01:14,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:14,036 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:14,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:14,036 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-06-05 17:01:14,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:14,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712099660] [2021-06-05 17:01:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:14,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:14,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712099660] [2021-06-05 17:01:14,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712099660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:14,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720565854] [2021-06-05 17:01:14,063 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 [2021-06-05 17:01:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:14,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:14,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:14,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720565854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:14,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:14,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:01:14,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164631869] [2021-06-05 17:01:14,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:14,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:14,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:14,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:14,203 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) [2021-06-05 17:01:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:15,010 INFO L93 Difference]: Finished difference Result 22091 states and 80578 transitions. [2021-06-05 17:01:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:01:15,015 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 [2021-06-05 17:01:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:15,064 INFO L225 Difference]: With dead ends: 22091 [2021-06-05 17:01:15,064 INFO L226 Difference]: Without dead ends: 22076 [2021-06-05 17:01:15,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:01:15,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22076 states. [2021-06-05 17:01:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22076 to 15507. [2021-06-05 17:01:15,451 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) [2021-06-05 17:01:15,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15507 states to 15507 states and 60356 transitions. [2021-06-05 17:01:15,493 INFO L78 Accepts]: Start accepts. Automaton has 15507 states and 60356 transitions. Word has length 28 [2021-06-05 17:01:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:15,493 INFO L482 AbstractCegarLoop]: Abstraction has 15507 states and 60356 transitions. [2021-06-05 17:01:15,493 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) [2021-06-05 17:01:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 15507 states and 60356 transitions. [2021-06-05 17:01:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:15,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:15,518 INFO L521 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] [2021-06-05 17:01:15,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:15,718 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:15,718 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-06-05 17:01:15,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:15,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687924621] [2021-06-05 17:01:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:15,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:15,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687924621] [2021-06-05 17:01:15,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687924621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:15,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220947005] [2021-06-05 17:01:15,745 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 [2021-06-05 17:01:15,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:15,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:15,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:15,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:15,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220947005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:15,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:15,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:01:15,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649473239] [2021-06-05 17:01:15,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:15,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:15,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:15,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:15,845 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) [2021-06-05 17:01:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:16,495 INFO L93 Difference]: Finished difference Result 25101 states and 91625 transitions. [2021-06-05 17:01:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:01:16,496 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 [2021-06-05 17:01:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:16,554 INFO L225 Difference]: With dead ends: 25101 [2021-06-05 17:01:16,554 INFO L226 Difference]: Without dead ends: 25088 [2021-06-05 17:01:16,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:01:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25088 states. [2021-06-05 17:01:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25088 to 15601. [2021-06-05 17:01:17,033 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) [2021-06-05 17:01:17,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15601 states to 15601 states and 60811 transitions. [2021-06-05 17:01:17,077 INFO L78 Accepts]: Start accepts. Automaton has 15601 states and 60811 transitions. Word has length 28 [2021-06-05 17:01:17,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:17,077 INFO L482 AbstractCegarLoop]: Abstraction has 15601 states and 60811 transitions. [2021-06-05 17:01:17,077 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) [2021-06-05 17:01:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 15601 states and 60811 transitions. [2021-06-05 17:01:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:17,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:17,103 INFO L521 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] [2021-06-05 17:01:17,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 17:01:17,303 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:17,304 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-06-05 17:01:17,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:17,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288858056] [2021-06-05 17:01:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:17,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:17,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288858056] [2021-06-05 17:01:17,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288858056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:17,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543334207] [2021-06-05 17:01:17,330 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 [2021-06-05 17:01:17,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:01:17,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:17,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:17,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:17,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543334207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:17,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:17,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:01:17,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037473533] [2021-06-05 17:01:17,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:17,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:17,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:17,434 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) [2021-06-05 17:01:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:18,164 INFO L93 Difference]: Finished difference Result 26885 states and 97285 transitions. [2021-06-05 17:01:18,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:01:18,164 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 [2021-06-05 17:01:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:18,225 INFO L225 Difference]: With dead ends: 26885 [2021-06-05 17:01:18,225 INFO L226 Difference]: Without dead ends: 26885 [2021-06-05 17:01:18,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 388.1ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:01:18,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26885 states. [2021-06-05 17:01:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26885 to 15654. [2021-06-05 17:01:18,635 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) [2021-06-05 17:01:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15654 states to 15654 states and 60959 transitions. [2021-06-05 17:01:18,676 INFO L78 Accepts]: Start accepts. Automaton has 15654 states and 60959 transitions. Word has length 28 [2021-06-05 17:01:18,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:18,676 INFO L482 AbstractCegarLoop]: Abstraction has 15654 states and 60959 transitions. [2021-06-05 17:01:18,677 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) [2021-06-05 17:01:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 15654 states and 60959 transitions. [2021-06-05 17:01:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:18,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:18,702 INFO L521 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] [2021-06-05 17:01:18,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 17:01:18,902 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:18,903 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 84 times [2021-06-05 17:01:18,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:18,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531889100] [2021-06-05 17:01:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:18,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:18,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531889100] [2021-06-05 17:01:18,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531889100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:18,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323118368] [2021-06-05 17:01:18,936 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 [2021-06-05 17:01:18,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 17:01:18,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:18,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:19,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323118368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:19,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:19,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:01:19,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436308074] [2021-06-05 17:01:19,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:19,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:19,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:19,037 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) [2021-06-05 17:01:20,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:20,084 INFO L93 Difference]: Finished difference Result 26297 states and 97911 transitions. [2021-06-05 17:01:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 17:01:20,085 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 [2021-06-05 17:01:20,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:20,154 INFO L225 Difference]: With dead ends: 26297 [2021-06-05 17:01:20,154 INFO L226 Difference]: Without dead ends: 26293 [2021-06-05 17:01:20,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:01:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26293 states. [2021-06-05 17:01:20,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26293 to 15950. [2021-06-05 17:01:20,628 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) [2021-06-05 17:01:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 61943 transitions. [2021-06-05 17:01:20,678 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 61943 transitions. Word has length 28 [2021-06-05 17:01:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:20,678 INFO L482 AbstractCegarLoop]: Abstraction has 15950 states and 61943 transitions. [2021-06-05 17:01:20,678 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) [2021-06-05 17:01:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 61943 transitions. [2021-06-05 17:01:20,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:20,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:20,705 INFO L521 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] [2021-06-05 17:01:20,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 17:01:20,905 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:20,906 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-06-05 17:01:20,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:20,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205431931] [2021-06-05 17:01:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:20,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:20,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205431931] [2021-06-05 17:01:20,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205431931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:20,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829554627] [2021-06-05 17:01:20,943 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 [2021-06-05 17:01:20,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:20,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:20,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:20,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:21,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829554627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:21,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:21,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:01:21,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202220300] [2021-06-05 17:01:21,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:21,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:21,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:21,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:21,043 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) [2021-06-05 17:01:21,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:21,697 INFO L93 Difference]: Finished difference Result 23295 states and 86571 transitions. [2021-06-05 17:01:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:01:21,697 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 [2021-06-05 17:01:21,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:21,749 INFO L225 Difference]: With dead ends: 23295 [2021-06-05 17:01:21,749 INFO L226 Difference]: Without dead ends: 23272 [2021-06-05 17:01:21,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 337.6ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:01:21,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23272 states. [2021-06-05 17:01:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23272 to 16091. [2021-06-05 17:01:22,106 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) [2021-06-05 17:01:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16091 states to 16091 states and 62688 transitions. [2021-06-05 17:01:22,152 INFO L78 Accepts]: Start accepts. Automaton has 16091 states and 62688 transitions. Word has length 28 [2021-06-05 17:01:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:22,152 INFO L482 AbstractCegarLoop]: Abstraction has 16091 states and 62688 transitions. [2021-06-05 17:01:22,152 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) [2021-06-05 17:01:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 16091 states and 62688 transitions. [2021-06-05 17:01:22,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:22,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:22,177 INFO L521 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] [2021-06-05 17:01:22,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 17:01:22,378 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:22,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:22,378 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-06-05 17:01:22,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:22,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545151784] [2021-06-05 17:01:22,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:22,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:22,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545151784] [2021-06-05 17:01:22,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545151784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:22,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749237175] [2021-06-05 17:01:22,409 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 [2021-06-05 17:01:22,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:01:22,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:22,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749237175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:22,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:22,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:01:22,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993002341] [2021-06-05 17:01:22,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:22,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:22,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:22,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:22,518 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) [2021-06-05 17:01:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:23,246 INFO L93 Difference]: Finished difference Result 22857 states and 83754 transitions. [2021-06-05 17:01:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:01:23,247 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 [2021-06-05 17:01:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:23,296 INFO L225 Difference]: With dead ends: 22857 [2021-06-05 17:01:23,297 INFO L226 Difference]: Without dead ends: 22857 [2021-06-05 17:01:23,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:01:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22857 states. [2021-06-05 17:01:23,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22857 to 16206. [2021-06-05 17:01:23,760 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) [2021-06-05 17:01:23,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16206 states to 16206 states and 63011 transitions. [2021-06-05 17:01:23,809 INFO L78 Accepts]: Start accepts. Automaton has 16206 states and 63011 transitions. Word has length 28 [2021-06-05 17:01:23,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:23,810 INFO L482 AbstractCegarLoop]: Abstraction has 16206 states and 63011 transitions. [2021-06-05 17:01:23,810 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) [2021-06-05 17:01:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 16206 states and 63011 transitions. [2021-06-05 17:01:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:23,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:23,837 INFO L521 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] [2021-06-05 17:01:24,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:24,038 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:24,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:24,038 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-06-05 17:01:24,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:24,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161828160] [2021-06-05 17:01:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:24,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:24,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161828160] [2021-06-05 17:01:24,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161828160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:24,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185103225] [2021-06-05 17:01:24,070 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 [2021-06-05 17:01:24,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:01:24,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:24,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:24,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:24,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185103225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:24,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:24,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:01:24,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806841867] [2021-06-05 17:01:24,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:24,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:24,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:24,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:24,185 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) [2021-06-05 17:01:24,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:24,862 INFO L93 Difference]: Finished difference Result 25358 states and 93325 transitions. [2021-06-05 17:01:24,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:01:24,862 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 [2021-06-05 17:01:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:24,933 INFO L225 Difference]: With dead ends: 25358 [2021-06-05 17:01:24,933 INFO L226 Difference]: Without dead ends: 25358 [2021-06-05 17:01:24,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:01:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25358 states. [2021-06-05 17:01:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25358 to 17371. [2021-06-05 17:01:25,309 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) [2021-06-05 17:01:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 67230 transitions. [2021-06-05 17:01:25,354 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 67230 transitions. Word has length 28 [2021-06-05 17:01:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:25,354 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 67230 transitions. [2021-06-05 17:01:25,354 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) [2021-06-05 17:01:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 67230 transitions. [2021-06-05 17:01:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:25,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:25,380 INFO L521 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] [2021-06-05 17:01:25,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:25,580 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-06-05 17:01:25,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:25,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797200538] [2021-06-05 17:01:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:25,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:25,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797200538] [2021-06-05 17:01:25,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797200538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:25,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250442183] [2021-06-05 17:01:25,612 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 [2021-06-05 17:01:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:25,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:25,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:25,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250442183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:25,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:25,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:01:25,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518319469] [2021-06-05 17:01:25,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:25,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:25,712 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) [2021-06-05 17:01:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:26,592 INFO L93 Difference]: Finished difference Result 28661 states and 104016 transitions. [2021-06-05 17:01:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:01:26,593 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 [2021-06-05 17:01:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:26,659 INFO L225 Difference]: With dead ends: 28661 [2021-06-05 17:01:26,659 INFO L226 Difference]: Without dead ends: 28661 [2021-06-05 17:01:26,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 463.3ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:01:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28661 states. [2021-06-05 17:01:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28661 to 17617. [2021-06-05 17:01:27,081 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) [2021-06-05 17:01:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17617 states to 17617 states and 68436 transitions. [2021-06-05 17:01:27,129 INFO L78 Accepts]: Start accepts. Automaton has 17617 states and 68436 transitions. Word has length 28 [2021-06-05 17:01:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:27,129 INFO L482 AbstractCegarLoop]: Abstraction has 17617 states and 68436 transitions. [2021-06-05 17:01:27,129 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) [2021-06-05 17:01:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 17617 states and 68436 transitions. [2021-06-05 17:01:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:27,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:27,156 INFO L521 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] [2021-06-05 17:01:27,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 17:01:27,356 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:27,356 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 85 times [2021-06-05 17:01:27,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:27,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113335384] [2021-06-05 17:01:27,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:27,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:27,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113335384] [2021-06-05 17:01:27,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113335384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:27,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633007660] [2021-06-05 17:01:27,391 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 [2021-06-05 17:01:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:27,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:27,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:27,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633007660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:27,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:27,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:01:27,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889059009] [2021-06-05 17:01:27,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:27,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:27,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:27,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:27,515 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) [2021-06-05 17:01:29,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:29,123 INFO L93 Difference]: Finished difference Result 45772 states and 165843 transitions. [2021-06-05 17:01:29,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:01:29,123 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 [2021-06-05 17:01:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:29,234 INFO L225 Difference]: With dead ends: 45772 [2021-06-05 17:01:29,234 INFO L226 Difference]: Without dead ends: 45772 [2021-06-05 17:01:29,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 960.1ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:01:29,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45772 states. [2021-06-05 17:01:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45772 to 18979. [2021-06-05 17:01:29,903 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) [2021-06-05 17:01:29,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18979 states to 18979 states and 74448 transitions. [2021-06-05 17:01:29,964 INFO L78 Accepts]: Start accepts. Automaton has 18979 states and 74448 transitions. Word has length 28 [2021-06-05 17:01:29,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:29,964 INFO L482 AbstractCegarLoop]: Abstraction has 18979 states and 74448 transitions. [2021-06-05 17:01:29,964 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) [2021-06-05 17:01:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 18979 states and 74448 transitions. [2021-06-05 17:01:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:29,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:29,997 INFO L521 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] [2021-06-05 17:01:30,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:30,198 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:30,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:30,198 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 86 times [2021-06-05 17:01:30,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:30,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270594057] [2021-06-05 17:01:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:30,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:30,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270594057] [2021-06-05 17:01:30,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270594057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:30,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021336571] [2021-06-05 17:01:30,238 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 [2021-06-05 17:01:30,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:30,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:30,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:30,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:30,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021336571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:30,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:30,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:01:30,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949183954] [2021-06-05 17:01:30,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:30,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:30,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:30,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:30,368 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) [2021-06-05 17:01:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:31,883 INFO L93 Difference]: Finished difference Result 44697 states and 163047 transitions. [2021-06-05 17:01:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:01:31,883 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 [2021-06-05 17:01:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:31,993 INFO L225 Difference]: With dead ends: 44697 [2021-06-05 17:01:31,994 INFO L226 Difference]: Without dead ends: 44697 [2021-06-05 17:01:31,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 914.8ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:01:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44697 states. [2021-06-05 17:01:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44697 to 18947. [2021-06-05 17:01:32,716 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) [2021-06-05 17:01:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18947 states to 18947 states and 74264 transitions. [2021-06-05 17:01:32,766 INFO L78 Accepts]: Start accepts. Automaton has 18947 states and 74264 transitions. Word has length 28 [2021-06-05 17:01:32,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:32,767 INFO L482 AbstractCegarLoop]: Abstraction has 18947 states and 74264 transitions. [2021-06-05 17:01:32,767 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) [2021-06-05 17:01:32,767 INFO L276 IsEmpty]: Start isEmpty. Operand 18947 states and 74264 transitions. [2021-06-05 17:01:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:32,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:32,794 INFO L521 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] [2021-06-05 17:01:32,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:32,995 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:32,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:32,995 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-06-05 17:01:32,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:32,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690359457] [2021-06-05 17:01:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:33,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:33,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690359457] [2021-06-05 17:01:33,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690359457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:33,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768587739] [2021-06-05 17:01:33,028 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 [2021-06-05 17:01:33,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:33,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:33,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768587739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:33,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:33,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:01:33,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669489487] [2021-06-05 17:01:33,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:01:33,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:33,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:01:33,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:01:33,105 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) [2021-06-05 17:01:33,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:33,409 INFO L93 Difference]: Finished difference Result 30407 states and 117873 transitions. [2021-06-05 17:01:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:01:33,410 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 [2021-06-05 17:01:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:33,500 INFO L225 Difference]: With dead ends: 30407 [2021-06-05 17:01:33,501 INFO L226 Difference]: Without dead ends: 30360 [2021-06-05 17:01:33,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:01:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30360 states. [2021-06-05 17:01:33,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30360 to 24152. [2021-06-05 17:01:33,960 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) [2021-06-05 17:01:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24152 states to 24152 states and 94748 transitions. [2021-06-05 17:01:34,031 INFO L78 Accepts]: Start accepts. Automaton has 24152 states and 94748 transitions. Word has length 28 [2021-06-05 17:01:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:34,031 INFO L482 AbstractCegarLoop]: Abstraction has 24152 states and 94748 transitions. [2021-06-05 17:01:34,031 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) [2021-06-05 17:01:34,031 INFO L276 IsEmpty]: Start isEmpty. Operand 24152 states and 94748 transitions. [2021-06-05 17:01:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:34,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:34,070 INFO L521 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] [2021-06-05 17:01:34,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:34,270 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:34,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:34,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-06-05 17:01:34,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:34,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987485350] [2021-06-05 17:01:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:34,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:34,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987485350] [2021-06-05 17:01:34,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987485350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:34,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908740906] [2021-06-05 17:01:34,302 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 [2021-06-05 17:01:34,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:01:34,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:34,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908740906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:34,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:34,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:01:34,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830319880] [2021-06-05 17:01:34,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:01:34,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:34,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:01:34,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:01:34,383 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) [2021-06-05 17:01:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:34,663 INFO L93 Difference]: Finished difference Result 26900 states and 103096 transitions. [2021-06-05 17:01:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:01:34,664 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 [2021-06-05 17:01:34,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:34,731 INFO L225 Difference]: With dead ends: 26900 [2021-06-05 17:01:34,731 INFO L226 Difference]: Without dead ends: 26900 [2021-06-05 17:01:34,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:01:34,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26900 states. [2021-06-05 17:01:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26900 to 23655. [2021-06-05 17:01:35,280 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) [2021-06-05 17:01:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23655 states to 23655 states and 92576 transitions. [2021-06-05 17:01:35,350 INFO L78 Accepts]: Start accepts. Automaton has 23655 states and 92576 transitions. Word has length 28 [2021-06-05 17:01:35,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:35,350 INFO L482 AbstractCegarLoop]: Abstraction has 23655 states and 92576 transitions. [2021-06-05 17:01:35,350 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) [2021-06-05 17:01:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 23655 states and 92576 transitions. [2021-06-05 17:01:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:35,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:35,386 INFO L521 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] [2021-06-05 17:01:35,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:35,587 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:35,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:35,587 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-06-05 17:01:35,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:35,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60908045] [2021-06-05 17:01:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:35,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:35,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60908045] [2021-06-05 17:01:35,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60908045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:35,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128936229] [2021-06-05 17:01:35,623 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 [2021-06-05 17:01:35,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:35,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:35,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:35,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:35,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128936229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:35,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:35,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 17:01:35,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941719815] [2021-06-05 17:01:35,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:01:35,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:35,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:01:35,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:01:35,730 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) [2021-06-05 17:01:36,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:36,612 INFO L93 Difference]: Finished difference Result 36284 states and 135440 transitions. [2021-06-05 17:01:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:01:36,613 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 [2021-06-05 17:01:36,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:36,708 INFO L225 Difference]: With dead ends: 36284 [2021-06-05 17:01:36,709 INFO L226 Difference]: Without dead ends: 36284 [2021-06-05 17:01:36,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:01:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36284 states. [2021-06-05 17:01:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36284 to 23725. [2021-06-05 17:01:37,286 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) [2021-06-05 17:01:37,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23725 states to 23725 states and 92804 transitions. [2021-06-05 17:01:37,357 INFO L78 Accepts]: Start accepts. Automaton has 23725 states and 92804 transitions. Word has length 28 [2021-06-05 17:01:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:37,357 INFO L482 AbstractCegarLoop]: Abstraction has 23725 states and 92804 transitions. [2021-06-05 17:01:37,357 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) [2021-06-05 17:01:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand 23725 states and 92804 transitions. [2021-06-05 17:01:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:37,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:37,395 INFO L521 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] [2021-06-05 17:01:37,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:37,595 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:37,596 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-06-05 17:01:37,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:37,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637185359] [2021-06-05 17:01:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:37,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:37,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637185359] [2021-06-05 17:01:37,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637185359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259172553] [2021-06-05 17:01:37,644 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 [2021-06-05 17:01:37,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:01:37,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:37,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:37,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:37,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259172553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:37,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:37,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:01:37,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772715140] [2021-06-05 17:01:37,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:37,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:37,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:37,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:37,786 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) [2021-06-05 17:01:39,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:39,362 INFO L93 Difference]: Finished difference Result 46767 states and 172486 transitions. [2021-06-05 17:01:39,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:01:39,363 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 [2021-06-05 17:01:39,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:39,490 INFO L225 Difference]: With dead ends: 46767 [2021-06-05 17:01:39,490 INFO L226 Difference]: Without dead ends: 46767 [2021-06-05 17:01:39,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 889.4ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 17:01:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46767 states. [2021-06-05 17:01:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46767 to 23724. [2021-06-05 17:01:40,291 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) [2021-06-05 17:01:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23724 states to 23724 states and 92844 transitions. [2021-06-05 17:01:40,356 INFO L78 Accepts]: Start accepts. Automaton has 23724 states and 92844 transitions. Word has length 28 [2021-06-05 17:01:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:40,356 INFO L482 AbstractCegarLoop]: Abstraction has 23724 states and 92844 transitions. [2021-06-05 17:01:40,356 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) [2021-06-05 17:01:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 23724 states and 92844 transitions. [2021-06-05 17:01:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:40,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:40,391 INFO L521 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] [2021-06-05 17:01:40,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 17:01:40,592 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:40,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:40,592 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-06-05 17:01:40,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:40,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096182952] [2021-06-05 17:01:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:40,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:40,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096182952] [2021-06-05 17:01:40,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096182952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:40,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263711574] [2021-06-05 17:01:40,629 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 [2021-06-05 17:01:40,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:01:40,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:40,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:40,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263711574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:40,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:40,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:01:40,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344248511] [2021-06-05 17:01:40,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:40,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:40,746 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) [2021-06-05 17:01:42,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:42,190 INFO L93 Difference]: Finished difference Result 46491 states and 172131 transitions. [2021-06-05 17:01:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:01:42,191 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 [2021-06-05 17:01:42,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:42,308 INFO L225 Difference]: With dead ends: 46491 [2021-06-05 17:01:42,308 INFO L226 Difference]: Without dead ends: 46491 [2021-06-05 17:01:42,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 848.2ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 17:01:42,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46491 states. [2021-06-05 17:01:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46491 to 23508. [2021-06-05 17:01:42,983 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) [2021-06-05 17:01:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23508 states to 23508 states and 91842 transitions. [2021-06-05 17:01:43,051 INFO L78 Accepts]: Start accepts. Automaton has 23508 states and 91842 transitions. Word has length 28 [2021-06-05 17:01:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:43,051 INFO L482 AbstractCegarLoop]: Abstraction has 23508 states and 91842 transitions. [2021-06-05 17:01:43,051 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) [2021-06-05 17:01:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 23508 states and 91842 transitions. [2021-06-05 17:01:43,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:43,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:43,258 INFO L521 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] [2021-06-05 17:01:43,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 17:01:43,458 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:43,459 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-06-05 17:01:43,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:43,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630876022] [2021-06-05 17:01:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:43,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:43,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630876022] [2021-06-05 17:01:43,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630876022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:43,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000218163] [2021-06-05 17:01:43,486 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 [2021-06-05 17:01:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:43,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:01:43,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:01:43,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000218163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:43,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:43,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 17:01:43,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373407896] [2021-06-05 17:01:43,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:01:43,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:43,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:01:43,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:01:43,604 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) [2021-06-05 17:01:43,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:43,905 INFO L93 Difference]: Finished difference Result 35906 states and 134992 transitions. [2021-06-05 17:01:43,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:01:43,905 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 [2021-06-05 17:01:43,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:43,992 INFO L225 Difference]: With dead ends: 35906 [2021-06-05 17:01:43,992 INFO L226 Difference]: Without dead ends: 35889 [2021-06-05 17:01:43,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:01:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35889 states. [2021-06-05 17:01:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35889 to 23779. [2021-06-05 17:01:44,492 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) [2021-06-05 17:01:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23779 states to 23779 states and 93008 transitions. [2021-06-05 17:01:44,560 INFO L78 Accepts]: Start accepts. Automaton has 23779 states and 93008 transitions. Word has length 28 [2021-06-05 17:01:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:44,561 INFO L482 AbstractCegarLoop]: Abstraction has 23779 states and 93008 transitions. [2021-06-05 17:01:44,561 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) [2021-06-05 17:01:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 23779 states and 93008 transitions. [2021-06-05 17:01:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:44,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:44,596 INFO L521 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] [2021-06-05 17:01:44,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 17:01:44,796 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:44,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:44,797 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-06-05 17:01:44,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:44,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879508284] [2021-06-05 17:01:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:44,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:44,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879508284] [2021-06-05 17:01:44,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879508284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:44,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601969959] [2021-06-05 17:01:44,824 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 [2021-06-05 17:01:44,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:44,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:01:44,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:01:44,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601969959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:44,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:44,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 17:01:44,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992365425] [2021-06-05 17:01:44,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:01:44,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:44,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:01:44,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:01:44,907 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) [2021-06-05 17:01:45,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:45,213 INFO L93 Difference]: Finished difference Result 38100 states and 141941 transitions. [2021-06-05 17:01:45,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:01:45,213 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 [2021-06-05 17:01:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:45,305 INFO L225 Difference]: With dead ends: 38100 [2021-06-05 17:01:45,305 INFO L226 Difference]: Without dead ends: 38100 [2021-06-05 17:01:45,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:01:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38100 states. [2021-06-05 17:01:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38100 to 23448. [2021-06-05 17:01:46,021 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) [2021-06-05 17:01:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23448 states to 23448 states and 91422 transitions. [2021-06-05 17:01:46,084 INFO L78 Accepts]: Start accepts. Automaton has 23448 states and 91422 transitions. Word has length 28 [2021-06-05 17:01:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:46,084 INFO L482 AbstractCegarLoop]: Abstraction has 23448 states and 91422 transitions. [2021-06-05 17:01:46,084 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) [2021-06-05 17:01:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 23448 states and 91422 transitions. [2021-06-05 17:01:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:46,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:46,118 INFO L521 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] [2021-06-05 17:01:46,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 17:01:46,319 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-06-05 17:01:46,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:46,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651117669] [2021-06-05 17:01:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:46,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:46,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651117669] [2021-06-05 17:01:46,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651117669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:46,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095910403] [2021-06-05 17:01:46,356 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 [2021-06-05 17:01:46,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:01:46,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:46,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:46,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:46,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095910403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:46,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:46,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:01:46,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412141440] [2021-06-05 17:01:46,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:46,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:46,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:46,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:46,455 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) [2021-06-05 17:01:47,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:47,358 INFO L93 Difference]: Finished difference Result 33419 states and 125361 transitions. [2021-06-05 17:01:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 17:01:47,359 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 [2021-06-05 17:01:47,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:47,434 INFO L225 Difference]: With dead ends: 33419 [2021-06-05 17:01:47,434 INFO L226 Difference]: Without dead ends: 33419 [2021-06-05 17:01:47,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 401.9ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:01:47,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33419 states. [2021-06-05 17:01:48,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33419 to 23496. [2021-06-05 17:01:48,098 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) [2021-06-05 17:01:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23496 states to 23496 states and 91578 transitions. [2021-06-05 17:01:48,175 INFO L78 Accepts]: Start accepts. Automaton has 23496 states and 91578 transitions. Word has length 28 [2021-06-05 17:01:48,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:48,175 INFO L482 AbstractCegarLoop]: Abstraction has 23496 states and 91578 transitions. [2021-06-05 17:01:48,175 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) [2021-06-05 17:01:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 23496 states and 91578 transitions. [2021-06-05 17:01:48,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:48,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:48,212 INFO L521 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] [2021-06-05 17:01:48,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 17:01:48,413 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:48,413 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-06-05 17:01:48,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:48,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212361966] [2021-06-05 17:01:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:48,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:48,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212361966] [2021-06-05 17:01:48,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212361966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:48,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776568194] [2021-06-05 17:01:48,455 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 [2021-06-05 17:01:48,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:48,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:48,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:48,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776568194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:48,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:48,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:01:48,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104516791] [2021-06-05 17:01:48,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:48,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:48,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:48,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:48,557 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) [2021-06-05 17:01:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:49,667 INFO L93 Difference]: Finished difference Result 35119 states and 130293 transitions. [2021-06-05 17:01:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 17:01:49,668 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 [2021-06-05 17:01:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:49,753 INFO L225 Difference]: With dead ends: 35119 [2021-06-05 17:01:49,753 INFO L226 Difference]: Without dead ends: 35119 [2021-06-05 17:01:49,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 614.4ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:01:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35119 states. [2021-06-05 17:01:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35119 to 24060. [2021-06-05 17:01:50,360 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) [2021-06-05 17:01:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24060 states to 24060 states and 93324 transitions. [2021-06-05 17:01:50,428 INFO L78 Accepts]: Start accepts. Automaton has 24060 states and 93324 transitions. Word has length 28 [2021-06-05 17:01:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:50,428 INFO L482 AbstractCegarLoop]: Abstraction has 24060 states and 93324 transitions. [2021-06-05 17:01:50,428 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) [2021-06-05 17:01:50,428 INFO L276 IsEmpty]: Start isEmpty. Operand 24060 states and 93324 transitions. [2021-06-05 17:01:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:50,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:50,465 INFO L521 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] [2021-06-05 17:01:50,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:50,666 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:50,666 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-06-05 17:01:50,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:50,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916087902] [2021-06-05 17:01:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:50,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:50,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916087902] [2021-06-05 17:01:50,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916087902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:50,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327903318] [2021-06-05 17:01:50,713 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 [2021-06-05 17:01:50,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:01:50,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:50,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:50,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:50,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327903318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:50,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:50,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:01:50,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987981712] [2021-06-05 17:01:50,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:50,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:50,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:50,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:50,805 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) [2021-06-05 17:01:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:51,867 INFO L93 Difference]: Finished difference Result 34157 states and 127778 transitions. [2021-06-05 17:01:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:01:51,868 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 [2021-06-05 17:01:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:51,969 INFO L225 Difference]: With dead ends: 34157 [2021-06-05 17:01:51,969 INFO L226 Difference]: Without dead ends: 34153 [2021-06-05 17:01:51,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:01:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34153 states. [2021-06-05 17:01:52,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34153 to 23952. [2021-06-05 17:01:52,656 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) [2021-06-05 17:01:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23952 states to 23952 states and 92964 transitions. [2021-06-05 17:01:52,720 INFO L78 Accepts]: Start accepts. Automaton has 23952 states and 92964 transitions. Word has length 28 [2021-06-05 17:01:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:52,720 INFO L482 AbstractCegarLoop]: Abstraction has 23952 states and 92964 transitions. [2021-06-05 17:01:52,720 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) [2021-06-05 17:01:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 23952 states and 92964 transitions. [2021-06-05 17:01:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:52,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:52,756 INFO L521 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] [2021-06-05 17:01:52,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 17:01:52,956 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:52,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:52,957 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-06-05 17:01:52,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:52,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251171407] [2021-06-05 17:01:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:52,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:52,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251171407] [2021-06-05 17:01:52,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251171407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:52,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858335710] [2021-06-05 17:01:52,984 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 [2021-06-05 17:01:53,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:01:53,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:53,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:01:53,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 17:01:53,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858335710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:53,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:53,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 17:01:53,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787006309] [2021-06-05 17:01:53,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:01:53,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:53,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:01:53,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:01:53,077 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) [2021-06-05 17:01:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:53,371 INFO L93 Difference]: Finished difference Result 30321 states and 113570 transitions. [2021-06-05 17:01:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:01:53,372 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 [2021-06-05 17:01:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:53,639 INFO L225 Difference]: With dead ends: 30321 [2021-06-05 17:01:53,639 INFO L226 Difference]: Without dead ends: 30321 [2021-06-05 17:01:53,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:01:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30321 states. [2021-06-05 17:01:54,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30321 to 24262. [2021-06-05 17:01:54,163 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) [2021-06-05 17:01:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24262 states to 24262 states and 93977 transitions. [2021-06-05 17:01:54,237 INFO L78 Accepts]: Start accepts. Automaton has 24262 states and 93977 transitions. Word has length 28 [2021-06-05 17:01:54,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:54,237 INFO L482 AbstractCegarLoop]: Abstraction has 24262 states and 93977 transitions. [2021-06-05 17:01:54,237 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) [2021-06-05 17:01:54,238 INFO L276 IsEmpty]: Start isEmpty. Operand 24262 states and 93977 transitions. [2021-06-05 17:01:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:54,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:54,274 INFO L521 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] [2021-06-05 17:01:54,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:54,474 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-06-05 17:01:54,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:54,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967400433] [2021-06-05 17:01:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:54,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:54,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967400433] [2021-06-05 17:01:54,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967400433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:54,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326621977] [2021-06-05 17:01:54,513 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 [2021-06-05 17:01:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:54,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:54,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:01:54,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326621977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:54,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:54,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:01:54,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652053230] [2021-06-05 17:01:54,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:54,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:54,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:54,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:54,609 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) [2021-06-05 17:01:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:55,608 INFO L93 Difference]: Finished difference Result 35215 states and 130243 transitions. [2021-06-05 17:01:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:01:55,609 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 [2021-06-05 17:01:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:55,694 INFO L225 Difference]: With dead ends: 35215 [2021-06-05 17:01:55,695 INFO L226 Difference]: Without dead ends: 35215 [2021-06-05 17:01:55,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 565.2ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:01:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35215 states. [2021-06-05 17:01:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35215 to 26047. [2021-06-05 17:01:56,463 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) [2021-06-05 17:01:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 101119 transitions. [2021-06-05 17:01:56,538 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 101119 transitions. Word has length 28 [2021-06-05 17:01:56,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:56,538 INFO L482 AbstractCegarLoop]: Abstraction has 26047 states and 101119 transitions. [2021-06-05 17:01:56,538 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) [2021-06-05 17:01:56,538 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 101119 transitions. [2021-06-05 17:01:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:56,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:56,577 INFO L521 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] [2021-06-05 17:01:56,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:56,778 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:56,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:56,778 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-06-05 17:01:56,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:56,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351553777] [2021-06-05 17:01:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:56,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:56,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351553777] [2021-06-05 17:01:56,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351553777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:56,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546904563] [2021-06-05 17:01:56,813 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 [2021-06-05 17:01:56,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:56,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:56,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:01:56,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546904563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:56,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:56,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:01:56,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749399415] [2021-06-05 17:01:56,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:56,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:56,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:56,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:56,894 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) [2021-06-05 17:01:57,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:57,763 INFO L93 Difference]: Finished difference Result 33427 states and 125631 transitions. [2021-06-05 17:01:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:01:57,764 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 [2021-06-05 17:01:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:57,859 INFO L225 Difference]: With dead ends: 33427 [2021-06-05 17:01:57,859 INFO L226 Difference]: Without dead ends: 33415 [2021-06-05 17:01:57,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:01:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33415 states. [2021-06-05 17:01:58,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33415 to 26213. [2021-06-05 17:01:58,608 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) [2021-06-05 17:01:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26213 states to 26213 states and 101632 transitions. [2021-06-05 17:01:58,690 INFO L78 Accepts]: Start accepts. Automaton has 26213 states and 101632 transitions. Word has length 28 [2021-06-05 17:01:58,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:58,690 INFO L482 AbstractCegarLoop]: Abstraction has 26213 states and 101632 transitions. [2021-06-05 17:01:58,691 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) [2021-06-05 17:01:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 26213 states and 101632 transitions. [2021-06-05 17:01:58,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:58,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:58,733 INFO L521 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] [2021-06-05 17:01:58,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:58,933 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:58,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:58,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-06-05 17:01:58,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:58,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085549082] [2021-06-05 17:01:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:58,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:58,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085549082] [2021-06-05 17:01:58,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085549082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:58,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480693465] [2021-06-05 17:01:58,961 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 [2021-06-05 17:01:58,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:01:58,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:01:58,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:01:59,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480693465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:59,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:59,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 17:01:59,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484779229] [2021-06-05 17:01:59,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:01:59,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:59,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:01:59,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:01:59,043 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) [2021-06-05 17:01:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:59,303 INFO L93 Difference]: Finished difference Result 30773 states and 117208 transitions. [2021-06-05 17:01:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:01:59,304 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 [2021-06-05 17:01:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:59,373 INFO L225 Difference]: With dead ends: 30773 [2021-06-05 17:01:59,373 INFO L226 Difference]: Without dead ends: 30773 [2021-06-05 17:01:59,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:01:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30773 states. [2021-06-05 17:02:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30773 to 27420. [2021-06-05 17:02:00,050 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) [2021-06-05 17:02:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27420 states to 27420 states and 106208 transitions. [2021-06-05 17:02:00,127 INFO L78 Accepts]: Start accepts. Automaton has 27420 states and 106208 transitions. Word has length 28 [2021-06-05 17:02:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:00,127 INFO L482 AbstractCegarLoop]: Abstraction has 27420 states and 106208 transitions. [2021-06-05 17:02:00,127 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) [2021-06-05 17:02:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 27420 states and 106208 transitions. [2021-06-05 17:02:00,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:00,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:00,353 INFO L521 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] [2021-06-05 17:02:00,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 17:02:00,565 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:00,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-06-05 17:02:00,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:00,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805983346] [2021-06-05 17:02:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:00,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:00,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805983346] [2021-06-05 17:02:00,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805983346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:00,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533737499] [2021-06-05 17:02:00,602 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 [2021-06-05 17:02:00,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:00,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:00,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:00,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533737499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:00,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:00,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:02:00,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426755183] [2021-06-05 17:02:00,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:00,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:00,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:00,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:00,692 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) [2021-06-05 17:02:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:01,459 INFO L93 Difference]: Finished difference Result 35583 states and 132544 transitions. [2021-06-05 17:02:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:02:01,459 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 [2021-06-05 17:02:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:01,542 INFO L225 Difference]: With dead ends: 35583 [2021-06-05 17:02:01,542 INFO L226 Difference]: Without dead ends: 35583 [2021-06-05 17:02:01,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 401.9ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:02:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35583 states. [2021-06-05 17:02:02,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35583 to 28674. [2021-06-05 17:02:02,307 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) [2021-06-05 17:02:02,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28674 states to 28674 states and 110165 transitions. [2021-06-05 17:02:02,400 INFO L78 Accepts]: Start accepts. Automaton has 28674 states and 110165 transitions. Word has length 28 [2021-06-05 17:02:02,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:02,400 INFO L482 AbstractCegarLoop]: Abstraction has 28674 states and 110165 transitions. [2021-06-05 17:02:02,401 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) [2021-06-05 17:02:02,401 INFO L276 IsEmpty]: Start isEmpty. Operand 28674 states and 110165 transitions. [2021-06-05 17:02:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:02,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:02,453 INFO L521 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] [2021-06-05 17:02:02,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:02,654 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:02,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:02,654 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-06-05 17:02:02,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:02,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562886714] [2021-06-05 17:02:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:02,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:02,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562886714] [2021-06-05 17:02:02,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562886714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:02,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51367062] [2021-06-05 17:02:02,816 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 [2021-06-05 17:02:02,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:02:02,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:02,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:02,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51367062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:02,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:02,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:02:02,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10798870] [2021-06-05 17:02:02,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:02,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:02,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:02,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:02,896 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) [2021-06-05 17:02:03,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:03,504 INFO L93 Difference]: Finished difference Result 34707 states and 130204 transitions. [2021-06-05 17:02:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:02:03,505 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 [2021-06-05 17:02:03,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:03,588 INFO L225 Difference]: With dead ends: 34707 [2021-06-05 17:02:03,588 INFO L226 Difference]: Without dead ends: 34699 [2021-06-05 17:02:03,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:02:03,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34699 states. [2021-06-05 17:02:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34699 to 28480. [2021-06-05 17:02:04,250 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) [2021-06-05 17:02:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28480 states to 28480 states and 109586 transitions. [2021-06-05 17:02:04,329 INFO L78 Accepts]: Start accepts. Automaton has 28480 states and 109586 transitions. Word has length 28 [2021-06-05 17:02:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:04,329 INFO L482 AbstractCegarLoop]: Abstraction has 28480 states and 109586 transitions. [2021-06-05 17:02:04,329 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) [2021-06-05 17:02:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 28480 states and 109586 transitions. [2021-06-05 17:02:04,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:04,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:04,375 INFO L521 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] [2021-06-05 17:02:04,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 17:02:04,576 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:04,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-06-05 17:02:04,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:04,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928870058] [2021-06-05 17:02:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:04,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928870058] [2021-06-05 17:02:04,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928870058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035924246] [2021-06-05 17:02:04,608 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 [2021-06-05 17:02:04,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:02:04,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:04,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:04,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:04,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035924246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:04,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:04,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:02:04,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718649327] [2021-06-05 17:02:04,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:04,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:04,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:04,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:04,693 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) [2021-06-05 17:02:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:05,528 INFO L93 Difference]: Finished difference Result 36567 states and 135873 transitions. [2021-06-05 17:02:05,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:02:05,528 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 [2021-06-05 17:02:05,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:05,615 INFO L225 Difference]: With dead ends: 36567 [2021-06-05 17:02:05,615 INFO L226 Difference]: Without dead ends: 36567 [2021-06-05 17:02:05,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:02:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36567 states. [2021-06-05 17:02:06,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36567 to 29508. [2021-06-05 17:02:06,356 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) [2021-06-05 17:02:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29508 states to 29508 states and 112894 transitions. [2021-06-05 17:02:06,451 INFO L78 Accepts]: Start accepts. Automaton has 29508 states and 112894 transitions. Word has length 28 [2021-06-05 17:02:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:06,451 INFO L482 AbstractCegarLoop]: Abstraction has 29508 states and 112894 transitions. [2021-06-05 17:02:06,451 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) [2021-06-05 17:02:06,452 INFO L276 IsEmpty]: Start isEmpty. Operand 29508 states and 112894 transitions. [2021-06-05 17:02:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:06,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:06,503 INFO L521 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] [2021-06-05 17:02:06,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 17:02:06,704 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:06,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:06,704 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-06-05 17:02:06,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:06,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461972101] [2021-06-05 17:02:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:06,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:06,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461972101] [2021-06-05 17:02:06,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461972101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:06,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092512995] [2021-06-05 17:02:06,739 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 [2021-06-05 17:02:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:02:06,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:06,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092512995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:06,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:06,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 17:02:06,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206340965] [2021-06-05 17:02:06,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:06,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:06,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:06,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:06,815 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) [2021-06-05 17:02:07,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:07,226 INFO L93 Difference]: Finished difference Result 35843 states and 136177 transitions. [2021-06-05 17:02:07,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:02:07,227 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 [2021-06-05 17:02:07,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:07,323 INFO L225 Difference]: With dead ends: 35843 [2021-06-05 17:02:07,323 INFO L226 Difference]: Without dead ends: 35830 [2021-06-05 17:02:07,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:02:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35830 states. [2021-06-05 17:02:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35830 to 34303. [2021-06-05 17:02:08,137 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) [2021-06-05 17:02:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34303 states to 34303 states and 131758 transitions. [2021-06-05 17:02:08,479 INFO L78 Accepts]: Start accepts. Automaton has 34303 states and 131758 transitions. Word has length 28 [2021-06-05 17:02:08,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:08,479 INFO L482 AbstractCegarLoop]: Abstraction has 34303 states and 131758 transitions. [2021-06-05 17:02:08,479 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) [2021-06-05 17:02:08,479 INFO L276 IsEmpty]: Start isEmpty. Operand 34303 states and 131758 transitions. [2021-06-05 17:02:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:08,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:08,538 INFO L521 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] [2021-06-05 17:02:08,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 17:02:08,738 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:08,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-06-05 17:02:08,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:08,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758973179] [2021-06-05 17:02:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:08,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:08,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758973179] [2021-06-05 17:02:08,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758973179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:08,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201173907] [2021-06-05 17:02:08,795 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 [2021-06-05 17:02:08,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:08,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:08,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:02:08,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:08,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201173907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:08,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:08,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 17:02:08,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528723490] [2021-06-05 17:02:08,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:08,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:08,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:08,874 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) [2021-06-05 17:02:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:09,260 INFO L93 Difference]: Finished difference Result 37460 states and 141660 transitions. [2021-06-05 17:02:09,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:02:09,260 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 [2021-06-05 17:02:09,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:09,349 INFO L225 Difference]: With dead ends: 37460 [2021-06-05 17:02:09,349 INFO L226 Difference]: Without dead ends: 37460 [2021-06-05 17:02:09,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:02:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37460 states. [2021-06-05 17:02:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37460 to 33980. [2021-06-05 17:02:10,126 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) [2021-06-05 17:02:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33980 states to 33980 states and 130391 transitions. [2021-06-05 17:02:10,222 INFO L78 Accepts]: Start accepts. Automaton has 33980 states and 130391 transitions. Word has length 28 [2021-06-05 17:02:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:10,222 INFO L482 AbstractCegarLoop]: Abstraction has 33980 states and 130391 transitions. [2021-06-05 17:02:10,222 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) [2021-06-05 17:02:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 33980 states and 130391 transitions. [2021-06-05 17:02:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:10,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:10,277 INFO L521 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] [2021-06-05 17:02:10,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:10,478 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:10,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:10,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-06-05 17:02:10,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:10,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83449633] [2021-06-05 17:02:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:10,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:10,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83449633] [2021-06-05 17:02:10,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83449633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:10,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528167085] [2021-06-05 17:02:10,509 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 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 [2021-06-05 17:02:10,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:02:10,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:10,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:10,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:10,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528167085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:10,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:10,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:02:10,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194416487] [2021-06-05 17:02:10,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:10,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:10,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:10,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:10,587 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) [2021-06-05 17:02:11,113 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 17:02:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:11,399 INFO L93 Difference]: Finished difference Result 40756 states and 152783 transitions. [2021-06-05 17:02:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:02:11,399 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 [2021-06-05 17:02:11,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:11,506 INFO L225 Difference]: With dead ends: 40756 [2021-06-05 17:02:11,506 INFO L226 Difference]: Without dead ends: 40748 [2021-06-05 17:02:11,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:02:11,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40748 states. [2021-06-05 17:02:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40748 to 33946. [2021-06-05 17:02:12,410 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) [2021-06-05 17:02:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33946 states to 33946 states and 130274 transitions. [2021-06-05 17:02:12,502 INFO L78 Accepts]: Start accepts. Automaton has 33946 states and 130274 transitions. Word has length 28 [2021-06-05 17:02:12,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:12,502 INFO L482 AbstractCegarLoop]: Abstraction has 33946 states and 130274 transitions. [2021-06-05 17:02:12,502 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) [2021-06-05 17:02:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 33946 states and 130274 transitions. [2021-06-05 17:02:12,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:12,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:12,554 INFO L521 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] [2021-06-05 17:02:12,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 17:02:12,755 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:12,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:12,755 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-06-05 17:02:12,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:12,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813093217] [2021-06-05 17:02:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:02:12,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:12,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813093217] [2021-06-05 17:02:12,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813093217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:12,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333388706] [2021-06-05 17:02:12,788 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 [2021-06-05 17:02:12,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:12,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:12,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:02:12,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:02:12,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333388706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:12,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:12,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 17:02:12,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559428057] [2021-06-05 17:02:12,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:12,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:12,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:12,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:12,861 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) [2021-06-05 17:02:13,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:13,271 INFO L93 Difference]: Finished difference Result 36862 states and 139999 transitions. [2021-06-05 17:02:13,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:02:13,272 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 [2021-06-05 17:02:13,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:13,364 INFO L225 Difference]: With dead ends: 36862 [2021-06-05 17:02:13,364 INFO L226 Difference]: Without dead ends: 36862 [2021-06-05 17:02:13,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:02:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36862 states. [2021-06-05 17:02:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36862 to 34478. [2021-06-05 17:02:14,218 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) [2021-06-05 17:02:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34478 states to 34478 states and 132258 transitions. [2021-06-05 17:02:14,314 INFO L78 Accepts]: Start accepts. Automaton has 34478 states and 132258 transitions. Word has length 28 [2021-06-05 17:02:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:14,315 INFO L482 AbstractCegarLoop]: Abstraction has 34478 states and 132258 transitions. [2021-06-05 17:02:14,315 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) [2021-06-05 17:02:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 34478 states and 132258 transitions. [2021-06-05 17:02:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:14,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:14,369 INFO L521 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] [2021-06-05 17:02:14,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:14,569 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:14,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:14,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-06-05 17:02:14,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:14,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33657542] [2021-06-05 17:02:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:02:14,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:14,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33657542] [2021-06-05 17:02:14,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33657542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:14,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262842694] [2021-06-05 17:02:14,604 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 [2021-06-05 17:02:14,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:02:14,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:02:14,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262842694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:14,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:14,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:02:14,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177606083] [2021-06-05 17:02:14,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:14,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:14,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:14,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:14,684 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) [2021-06-05 17:02:14,961 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 17:02:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:15,502 INFO L93 Difference]: Finished difference Result 41641 states and 156125 transitions. [2021-06-05 17:02:15,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:02:15,503 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 [2021-06-05 17:02:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:15,603 INFO L225 Difference]: With dead ends: 41641 [2021-06-05 17:02:15,603 INFO L226 Difference]: Without dead ends: 41617 [2021-06-05 17:02:15,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 475.3ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:02:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41617 states. [2021-06-05 17:02:16,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41617 to 34650. [2021-06-05 17:02:16,489 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) [2021-06-05 17:02:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34650 states to 34650 states and 132792 transitions. [2021-06-05 17:02:16,609 INFO L78 Accepts]: Start accepts. Automaton has 34650 states and 132792 transitions. Word has length 28 [2021-06-05 17:02:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:16,609 INFO L482 AbstractCegarLoop]: Abstraction has 34650 states and 132792 transitions. [2021-06-05 17:02:16,609 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) [2021-06-05 17:02:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 34650 states and 132792 transitions. [2021-06-05 17:02:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:16,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:16,675 INFO L521 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] [2021-06-05 17:02:16,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 17:02:16,875 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:16,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:16,875 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-06-05 17:02:16,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:16,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009921060] [2021-06-05 17:02:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:16,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:16,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009921060] [2021-06-05 17:02:16,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009921060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:16,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883374216] [2021-06-05 17:02:16,917 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 [2021-06-05 17:02:16,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:02:16,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:16,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:02:16,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:16,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883374216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:16,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:16,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 17:02:16,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827427570] [2021-06-05 17:02:16,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:16,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:16,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:16,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:16,999 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) [2021-06-05 17:02:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:17,566 INFO L93 Difference]: Finished difference Result 37282 states and 141492 transitions. [2021-06-05 17:02:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:02:17,566 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 [2021-06-05 17:02:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:17,943 INFO L225 Difference]: With dead ends: 37282 [2021-06-05 17:02:17,943 INFO L226 Difference]: Without dead ends: 37282 [2021-06-05 17:02:17,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:02:18,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37282 states. [2021-06-05 17:02:18,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37282 to 34576. [2021-06-05 17:02:18,576 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) [2021-06-05 17:02:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34576 states to 34576 states and 132536 transitions. [2021-06-05 17:02:18,678 INFO L78 Accepts]: Start accepts. Automaton has 34576 states and 132536 transitions. Word has length 28 [2021-06-05 17:02:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:18,678 INFO L482 AbstractCegarLoop]: Abstraction has 34576 states and 132536 transitions. [2021-06-05 17:02:18,679 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) [2021-06-05 17:02:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 34576 states and 132536 transitions. [2021-06-05 17:02:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:18,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:18,736 INFO L521 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] [2021-06-05 17:02:18,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:18,937 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:18,937 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-06-05 17:02:18,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:18,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903559841] [2021-06-05 17:02:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:18,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:18,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903559841] [2021-06-05 17:02:18,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903559841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:18,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273180458] [2021-06-05 17:02:18,976 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 [2021-06-05 17:02:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:19,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:19,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:19,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273180458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:19,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:19,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:02:19,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921168769] [2021-06-05 17:02:19,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:19,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:19,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:19,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:19,339 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) [2021-06-05 17:02:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:20,030 INFO L93 Difference]: Finished difference Result 41564 states and 155866 transitions. [2021-06-05 17:02:20,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:02:20,031 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 [2021-06-05 17:02:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:20,135 INFO L225 Difference]: With dead ends: 41564 [2021-06-05 17:02:20,135 INFO L226 Difference]: Without dead ends: 41524 [2021-06-05 17:02:20,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 320.6ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:02:20,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41524 states. [2021-06-05 17:02:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41524 to 34750. [2021-06-05 17:02:20,986 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) [2021-06-05 17:02:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34750 states to 34750 states and 133073 transitions. [2021-06-05 17:02:21,087 INFO L78 Accepts]: Start accepts. Automaton has 34750 states and 133073 transitions. Word has length 28 [2021-06-05 17:02:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:21,087 INFO L482 AbstractCegarLoop]: Abstraction has 34750 states and 133073 transitions. [2021-06-05 17:02:21,087 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) [2021-06-05 17:02:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 34750 states and 133073 transitions. [2021-06-05 17:02:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:21,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:21,142 INFO L521 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] [2021-06-05 17:02:21,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 17:02:21,343 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:21,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-06-05 17:02:21,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:21,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687409272] [2021-06-05 17:02:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:21,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:21,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687409272] [2021-06-05 17:02:21,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687409272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:21,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512463474] [2021-06-05 17:02:21,376 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 [2021-06-05 17:02:21,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:21,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:21,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:21,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512463474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:21,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:21,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:02:21,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927350753] [2021-06-05 17:02:21,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:02:21,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:21,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:02:21,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:02:21,500 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) [2021-06-05 17:02:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:23,008 INFO L93 Difference]: Finished difference Result 77130 states and 285331 transitions. [2021-06-05 17:02:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:02:23,009 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 [2021-06-05 17:02:23,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:23,227 INFO L225 Difference]: With dead ends: 77130 [2021-06-05 17:02:23,227 INFO L226 Difference]: Without dead ends: 77130 [2021-06-05 17:02:23,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 667.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:02:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77130 states. [2021-06-05 17:02:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77130 to 43844. [2021-06-05 17:02:24,829 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) [2021-06-05 17:02:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43844 states to 43844 states and 171173 transitions. [2021-06-05 17:02:25,211 INFO L78 Accepts]: Start accepts. Automaton has 43844 states and 171173 transitions. Word has length 28 [2021-06-05 17:02:25,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:25,211 INFO L482 AbstractCegarLoop]: Abstraction has 43844 states and 171173 transitions. [2021-06-05 17:02:25,211 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) [2021-06-05 17:02:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 43844 states and 171173 transitions. [2021-06-05 17:02:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:25,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:25,282 INFO L521 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] [2021-06-05 17:02:25,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:25,482 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:25,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-06-05 17:02:25,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:25,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086068924] [2021-06-05 17:02:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:25,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:25,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086068924] [2021-06-05 17:02:25,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086068924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:25,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87525484] [2021-06-05 17:02:25,514 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 [2021-06-05 17:02:25,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:02:25,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:25,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:25,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:25,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87525484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:25,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:25,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:02:25,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308598245] [2021-06-05 17:02:25,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:02:25,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:25,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:02:25,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:02:25,637 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) [2021-06-05 17:02:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:27,174 INFO L93 Difference]: Finished difference Result 76528 states and 283739 transitions. [2021-06-05 17:02:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:02:27,175 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 [2021-06-05 17:02:27,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:27,430 INFO L225 Difference]: With dead ends: 76528 [2021-06-05 17:02:27,431 INFO L226 Difference]: Without dead ends: 76528 [2021-06-05 17:02:27,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 649.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:02:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76528 states. [2021-06-05 17:02:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76528 to 43841. [2021-06-05 17:02:28,877 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) [2021-06-05 17:02:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43841 states to 43841 states and 171159 transitions. [2021-06-05 17:02:29,030 INFO L78 Accepts]: Start accepts. Automaton has 43841 states and 171159 transitions. Word has length 28 [2021-06-05 17:02:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:29,030 INFO L482 AbstractCegarLoop]: Abstraction has 43841 states and 171159 transitions. [2021-06-05 17:02:29,030 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) [2021-06-05 17:02:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 43841 states and 171159 transitions. [2021-06-05 17:02:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:29,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:29,109 INFO L521 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] [2021-06-05 17:02:29,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:29,310 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:29,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:29,310 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-06-05 17:02:29,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:29,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015581472] [2021-06-05 17:02:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:29,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:29,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015581472] [2021-06-05 17:02:29,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015581472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:29,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768534662] [2021-06-05 17:02:29,344 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 [2021-06-05 17:02:29,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:29,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:29,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:29,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:29,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768534662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:29,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:29,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:02:29,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332664617] [2021-06-05 17:02:29,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:02:29,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:29,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:02:29,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:02:29,466 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) [2021-06-05 17:02:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:30,915 INFO L93 Difference]: Finished difference Result 71140 states and 265637 transitions. [2021-06-05 17:02:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:02:30,915 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 [2021-06-05 17:02:30,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:31,109 INFO L225 Difference]: With dead ends: 71140 [2021-06-05 17:02:31,109 INFO L226 Difference]: Without dead ends: 71140 [2021-06-05 17:02:31,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 838.7ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:02:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71140 states. [2021-06-05 17:02:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71140 to 43865. [2021-06-05 17:02:32,573 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) [2021-06-05 17:02:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43865 states to 43865 states and 171263 transitions. [2021-06-05 17:02:32,983 INFO L78 Accepts]: Start accepts. Automaton has 43865 states and 171263 transitions. Word has length 28 [2021-06-05 17:02:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:32,983 INFO L482 AbstractCegarLoop]: Abstraction has 43865 states and 171263 transitions. [2021-06-05 17:02:32,983 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) [2021-06-05 17:02:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 43865 states and 171263 transitions. [2021-06-05 17:02:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:33,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:33,082 INFO L521 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] [2021-06-05 17:02:33,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 17:02:33,282 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:33,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:33,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-06-05 17:02:33,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:33,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785739921] [2021-06-05 17:02:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:33,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:33,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785739921] [2021-06-05 17:02:33,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785739921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:33,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926916407] [2021-06-05 17:02:33,313 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 [2021-06-05 17:02:33,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:02:33,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:33,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:33,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:33,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926916407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:33,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:33,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:02:33,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381990957] [2021-06-05 17:02:33,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:02:33,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:33,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:02:33,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:02:33,423 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) [2021-06-05 17:02:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:34,529 INFO L93 Difference]: Finished difference Result 70268 states and 263382 transitions. [2021-06-05 17:02:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:02:34,530 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 [2021-06-05 17:02:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:34,724 INFO L225 Difference]: With dead ends: 70268 [2021-06-05 17:02:34,724 INFO L226 Difference]: Without dead ends: 70260 [2021-06-05 17:02:34,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 487.2ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:02:34,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70260 states. [2021-06-05 17:02:36,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70260 to 43865. [2021-06-05 17:02:36,474 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) [2021-06-05 17:02:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43865 states to 43865 states and 171257 transitions. [2021-06-05 17:02:36,601 INFO L78 Accepts]: Start accepts. Automaton has 43865 states and 171257 transitions. Word has length 28 [2021-06-05 17:02:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:36,601 INFO L482 AbstractCegarLoop]: Abstraction has 43865 states and 171257 transitions. [2021-06-05 17:02:36,601 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) [2021-06-05 17:02:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 43865 states and 171257 transitions. [2021-06-05 17:02:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:36,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:36,670 INFO L521 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] [2021-06-05 17:02:36,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 17:02:36,871 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:36,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:36,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-06-05 17:02:36,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:36,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708574953] [2021-06-05 17:02:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:36,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:36,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708574953] [2021-06-05 17:02:36,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708574953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:36,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089746693] [2021-06-05 17:02:36,903 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 [2021-06-05 17:02:36,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:02:36,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:36,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:36,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:37,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089746693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:37,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:37,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:02:37,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358057038] [2021-06-05 17:02:37,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:02:37,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:37,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:02:37,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:02:37,027 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) [2021-06-05 17:02:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:38,482 INFO L93 Difference]: Finished difference Result 69775 states and 262075 transitions. [2021-06-05 17:02:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:02:38,483 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 [2021-06-05 17:02:38,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:38,746 INFO L225 Difference]: With dead ends: 69775 [2021-06-05 17:02:38,746 INFO L226 Difference]: Without dead ends: 69775 [2021-06-05 17:02:38,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 560.8ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:02:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69775 states. [2021-06-05 17:02:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69775 to 43873. [2021-06-05 17:02:40,136 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) [2021-06-05 17:02:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43873 states to 43873 states and 171291 transitions. [2021-06-05 17:02:40,263 INFO L78 Accepts]: Start accepts. Automaton has 43873 states and 171291 transitions. Word has length 28 [2021-06-05 17:02:40,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:40,263 INFO L482 AbstractCegarLoop]: Abstraction has 43873 states and 171291 transitions. [2021-06-05 17:02:40,263 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) [2021-06-05 17:02:40,263 INFO L276 IsEmpty]: Start isEmpty. Operand 43873 states and 171291 transitions. [2021-06-05 17:02:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:40,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:40,331 INFO L521 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] [2021-06-05 17:02:40,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 17:02:40,532 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:40,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:40,533 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-06-05 17:02:40,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:40,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030578231] [2021-06-05 17:02:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:40,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:40,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030578231] [2021-06-05 17:02:40,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030578231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:40,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466636328] [2021-06-05 17:02:40,570 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 [2021-06-05 17:02:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:40,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:40,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:40,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466636328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:40,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:40,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:02:40,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80272160] [2021-06-05 17:02:40,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:02:40,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:40,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:02:40,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:02:40,713 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) [2021-06-05 17:02:42,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:42,820 INFO L93 Difference]: Finished difference Result 69542 states and 261491 transitions. [2021-06-05 17:02:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:02:42,820 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 [2021-06-05 17:02:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:43,059 INFO L225 Difference]: With dead ends: 69542 [2021-06-05 17:02:43,059 INFO L226 Difference]: Without dead ends: 69534 [2021-06-05 17:02:43,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:02:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69534 states. [2021-06-05 17:02:45,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69534 to 43873. [2021-06-05 17:02:45,218 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) [2021-06-05 17:02:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43873 states to 43873 states and 171289 transitions. [2021-06-05 17:02:45,386 INFO L78 Accepts]: Start accepts. Automaton has 43873 states and 171289 transitions. Word has length 28 [2021-06-05 17:02:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:45,386 INFO L482 AbstractCegarLoop]: Abstraction has 43873 states and 171289 transitions. [2021-06-05 17:02:45,386 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) [2021-06-05 17:02:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 43873 states and 171289 transitions. [2021-06-05 17:02:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:45,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:45,471 INFO L521 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] [2021-06-05 17:02:45,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 17:02:45,692 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-06-05 17:02:45,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:45,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117186060] [2021-06-05 17:02:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:45,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:45,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117186060] [2021-06-05 17:02:45,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117186060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:45,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017353652] [2021-06-05 17:02:45,749 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 [2021-06-05 17:02:45,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:45,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:45,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:45,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:45,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017353652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:45,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:45,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:02:45,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292145538] [2021-06-05 17:02:45,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:02:45,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:45,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:02:45,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:02:45,877 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) [2021-06-05 17:02:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:47,973 INFO L93 Difference]: Finished difference Result 69043 states and 258242 transitions. [2021-06-05 17:02:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:02:47,973 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 [2021-06-05 17:02:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:48,205 INFO L225 Difference]: With dead ends: 69043 [2021-06-05 17:02:48,205 INFO L226 Difference]: Without dead ends: 69043 [2021-06-05 17:02:48,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 808.2ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 17:02:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69043 states. [2021-06-05 17:02:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69043 to 47103. [2021-06-05 17:02:50,172 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) [2021-06-05 17:02:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47103 states to 47103 states and 184073 transitions. [2021-06-05 17:02:50,310 INFO L78 Accepts]: Start accepts. Automaton has 47103 states and 184073 transitions. Word has length 28 [2021-06-05 17:02:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:50,310 INFO L482 AbstractCegarLoop]: Abstraction has 47103 states and 184073 transitions. [2021-06-05 17:02:50,310 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) [2021-06-05 17:02:50,310 INFO L276 IsEmpty]: Start isEmpty. Operand 47103 states and 184073 transitions. [2021-06-05 17:02:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:50,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:50,670 INFO L521 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] [2021-06-05 17:02:50,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 17:02:50,899 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:50,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-06-05 17:02:50,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:50,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315290764] [2021-06-05 17:02:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:50,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:50,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315290764] [2021-06-05 17:02:50,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315290764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:50,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779742520] [2021-06-05 17:02:50,935 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 [2021-06-05 17:02:50,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:02:50,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:50,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:51,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779742520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:51,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:51,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:02:51,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752389608] [2021-06-05 17:02:51,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:02:51,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:51,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:02:51,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:02:51,042 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) [2021-06-05 17:02:52,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:52,183 INFO L93 Difference]: Finished difference Result 68545 states and 256931 transitions. [2021-06-05 17:02:52,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:02:52,183 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 [2021-06-05 17:02:52,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:52,374 INFO L225 Difference]: With dead ends: 68545 [2021-06-05 17:02:52,374 INFO L226 Difference]: Without dead ends: 68537 [2021-06-05 17:02:52,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:02:52,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68537 states. [2021-06-05 17:02:53,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68537 to 46797. [2021-06-05 17:02:53,784 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) [2021-06-05 17:02:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46797 states to 46797 states and 183126 transitions. [2021-06-05 17:02:54,185 INFO L78 Accepts]: Start accepts. Automaton has 46797 states and 183126 transitions. Word has length 28 [2021-06-05 17:02:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:54,185 INFO L482 AbstractCegarLoop]: Abstraction has 46797 states and 183126 transitions. [2021-06-05 17:02:54,186 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) [2021-06-05 17:02:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 46797 states and 183126 transitions. [2021-06-05 17:02:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:54,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:54,262 INFO L521 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] [2021-06-05 17:02:54,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:54,463 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-06-05 17:02:54,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:54,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751943204] [2021-06-05 17:02:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:54,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:54,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751943204] [2021-06-05 17:02:54,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751943204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:54,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264982687] [2021-06-05 17:02:54,495 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 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 [2021-06-05 17:02:54,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:54,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:54,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:54,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:54,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264982687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:54,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:54,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:02:54,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044696874] [2021-06-05 17:02:54,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:02:54,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:54,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:02:54,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:02:54,596 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) [2021-06-05 17:02:55,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:55,436 INFO L93 Difference]: Finished difference Result 66948 states and 252499 transitions. [2021-06-05 17:02:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:02:55,437 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 [2021-06-05 17:02:55,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:55,615 INFO L225 Difference]: With dead ends: 66948 [2021-06-05 17:02:55,615 INFO L226 Difference]: Without dead ends: 66924 [2021-06-05 17:02:55,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 350.5ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:02:55,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66924 states. [2021-06-05 17:02:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66924 to 46693. [2021-06-05 17:02:57,263 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) [2021-06-05 17:02:57,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46693 states to 46693 states and 182718 transitions. [2021-06-05 17:02:57,429 INFO L78 Accepts]: Start accepts. Automaton has 46693 states and 182718 transitions. Word has length 28 [2021-06-05 17:02:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:57,430 INFO L482 AbstractCegarLoop]: Abstraction has 46693 states and 182718 transitions. [2021-06-05 17:02:57,430 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) [2021-06-05 17:02:57,430 INFO L276 IsEmpty]: Start isEmpty. Operand 46693 states and 182718 transitions. [2021-06-05 17:02:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:57,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:57,505 INFO L521 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] [2021-06-05 17:02:57,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:57,706 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-06-05 17:02:57,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:57,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738451543] [2021-06-05 17:02:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:02:57,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:57,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738451543] [2021-06-05 17:02:57,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738451543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:57,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124385239] [2021-06-05 17:02:57,739 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 [2021-06-05 17:02:57,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:02:57,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:57,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:57,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:57,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124385239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:57,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:57,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:02:57,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062955937] [2021-06-05 17:02:57,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:02:57,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:57,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:02:57,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:02:57,860 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) [2021-06-05 17:02:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:59,003 INFO L93 Difference]: Finished difference Result 68144 states and 255825 transitions. [2021-06-05 17:02:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 17:02:59,003 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 [2021-06-05 17:02:59,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:59,191 INFO L225 Difference]: With dead ends: 68144 [2021-06-05 17:02:59,191 INFO L226 Difference]: Without dead ends: 68144 [2021-06-05 17:02:59,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 579.8ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:02:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68144 states. [2021-06-05 17:03:00,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68144 to 46789. [2021-06-05 17:03:00,845 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) [2021-06-05 17:03:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46789 states to 46789 states and 183032 transitions. [2021-06-05 17:03:00,983 INFO L78 Accepts]: Start accepts. Automaton has 46789 states and 183032 transitions. Word has length 28 [2021-06-05 17:03:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:00,983 INFO L482 AbstractCegarLoop]: Abstraction has 46789 states and 183032 transitions. [2021-06-05 17:03:00,983 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) [2021-06-05 17:03:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 46789 states and 183032 transitions. [2021-06-05 17:03:01,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:01,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:01,057 INFO L521 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] [2021-06-05 17:03:01,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:01,261 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-06-05 17:03:01,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:01,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861271854] [2021-06-05 17:03:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:03:01,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:01,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861271854] [2021-06-05 17:03:01,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861271854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:01,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076677309] [2021-06-05 17:03:01,295 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 [2021-06-05 17:03:01,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:03:01,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:01,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:01,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:01,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076677309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:01,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:01,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:03:01,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997685907] [2021-06-05 17:03:01,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:03:01,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:01,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:03:01,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:03:01,413 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) [2021-06-05 17:03:02,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:02,473 INFO L93 Difference]: Finished difference Result 67704 states and 254569 transitions. [2021-06-05 17:03:02,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:03:02,474 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 [2021-06-05 17:03:02,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:03,014 INFO L225 Difference]: With dead ends: 67704 [2021-06-05 17:03:03,014 INFO L226 Difference]: Without dead ends: 67696 [2021-06-05 17:03:03,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:03:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67696 states. [2021-06-05 17:03:04,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67696 to 46721. [2021-06-05 17:03:04,503 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) [2021-06-05 17:03:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46721 states to 46721 states and 182820 transitions. [2021-06-05 17:03:04,652 INFO L78 Accepts]: Start accepts. Automaton has 46721 states and 182820 transitions. Word has length 28 [2021-06-05 17:03:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:04,652 INFO L482 AbstractCegarLoop]: Abstraction has 46721 states and 182820 transitions. [2021-06-05 17:03:04,652 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) [2021-06-05 17:03:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 46721 states and 182820 transitions. [2021-06-05 17:03:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:04,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:04,730 INFO L521 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] [2021-06-05 17:03:04,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:04,931 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:04,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:04,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-06-05 17:03:04,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:04,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984081675] [2021-06-05 17:03:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:03:04,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:04,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984081675] [2021-06-05 17:03:04,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984081675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:04,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851891715] [2021-06-05 17:03:04,966 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 [2021-06-05 17:03:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:04,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:04,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:05,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851891715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:05,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:05,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:03:05,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20789209] [2021-06-05 17:03:05,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:03:05,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:05,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:03:05,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:03:05,082 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) [2021-06-05 17:03:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:05,934 INFO L93 Difference]: Finished difference Result 66435 states and 251058 transitions. [2021-06-05 17:03:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:03:05,934 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 [2021-06-05 17:03:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:06,123 INFO L225 Difference]: With dead ends: 66435 [2021-06-05 17:03:06,123 INFO L226 Difference]: Without dead ends: 66411 [2021-06-05 17:03:06,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 366.5ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:03:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66411 states. [2021-06-05 17:03:07,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66411 to 46697. [2021-06-05 17:03:07,956 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) [2021-06-05 17:03:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46697 states to 46697 states and 182732 transitions. [2021-06-05 17:03:08,099 INFO L78 Accepts]: Start accepts. Automaton has 46697 states and 182732 transitions. Word has length 28 [2021-06-05 17:03:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:08,099 INFO L482 AbstractCegarLoop]: Abstraction has 46697 states and 182732 transitions. [2021-06-05 17:03:08,099 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) [2021-06-05 17:03:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 46697 states and 182732 transitions. [2021-06-05 17:03:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:08,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:08,176 INFO L521 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] [2021-06-05 17:03:08,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:08,376 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-06-05 17:03:08,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:08,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755327112] [2021-06-05 17:03:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:08,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:08,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755327112] [2021-06-05 17:03:08,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755327112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:08,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304142706] [2021-06-05 17:03:08,415 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 [2021-06-05 17:03:08,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:08,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:08,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:08,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:08,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304142706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:08,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:08,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:03:08,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31264149] [2021-06-05 17:03:08,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:03:08,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:08,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:03:08,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:03:08,512 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) [2021-06-05 17:03:10,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:10,370 INFO L93 Difference]: Finished difference Result 69974 states and 261149 transitions. [2021-06-05 17:03:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 17:03:10,370 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 [2021-06-05 17:03:10,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:10,562 INFO L225 Difference]: With dead ends: 69974 [2021-06-05 17:03:10,562 INFO L226 Difference]: Without dead ends: 69974 [2021-06-05 17:03:10,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 849.1ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 17:03:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69974 states. [2021-06-05 17:03:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69974 to 51465. [2021-06-05 17:03:12,093 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) [2021-06-05 17:03:12,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51465 states to 51465 states and 198872 transitions. [2021-06-05 17:03:12,253 INFO L78 Accepts]: Start accepts. Automaton has 51465 states and 198872 transitions. Word has length 28 [2021-06-05 17:03:12,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:12,253 INFO L482 AbstractCegarLoop]: Abstraction has 51465 states and 198872 transitions. [2021-06-05 17:03:12,253 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) [2021-06-05 17:03:12,253 INFO L276 IsEmpty]: Start isEmpty. Operand 51465 states and 198872 transitions. [2021-06-05 17:03:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:12,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:12,332 INFO L521 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] [2021-06-05 17:03:12,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 17:03:12,532 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:12,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-06-05 17:03:12,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:12,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551992293] [2021-06-05 17:03:12,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:12,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:12,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551992293] [2021-06-05 17:03:12,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551992293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:12,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371118667] [2021-06-05 17:03:12,570 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 [2021-06-05 17:03:12,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:03:12,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:12,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:12,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:12,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371118667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:12,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:12,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:03:12,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183332180] [2021-06-05 17:03:12,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:03:12,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:12,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:03:12,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:03:12,660 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) [2021-06-05 17:03:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:14,249 INFO L93 Difference]: Finished difference Result 69176 states and 258972 transitions. [2021-06-05 17:03:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:03:14,250 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 [2021-06-05 17:03:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:14,434 INFO L225 Difference]: With dead ends: 69176 [2021-06-05 17:03:14,435 INFO L226 Difference]: Without dead ends: 69168 [2021-06-05 17:03:14,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 664.8ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 17:03:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69168 states. [2021-06-05 17:03:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69168 to 50301. [2021-06-05 17:03:16,018 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) [2021-06-05 17:03:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50301 states to 50301 states and 195246 transitions. [2021-06-05 17:03:16,174 INFO L78 Accepts]: Start accepts. Automaton has 50301 states and 195246 transitions. Word has length 28 [2021-06-05 17:03:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:16,174 INFO L482 AbstractCegarLoop]: Abstraction has 50301 states and 195246 transitions. [2021-06-05 17:03:16,174 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) [2021-06-05 17:03:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 50301 states and 195246 transitions. [2021-06-05 17:03:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:16,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:16,253 INFO L521 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] [2021-06-05 17:03:16,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 17:03:16,453 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-06-05 17:03:16,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:16,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482355358] [2021-06-05 17:03:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:16,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:16,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482355358] [2021-06-05 17:03:16,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482355358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:16,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032010554] [2021-06-05 17:03:16,492 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 [2021-06-05 17:03:16,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:16,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:16,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:16,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:16,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032010554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:16,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:16,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:03:16,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472795891] [2021-06-05 17:03:16,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:03:16,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:16,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:03:16,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:03:16,879 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) [2021-06-05 17:03:18,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:18,065 INFO L93 Difference]: Finished difference Result 67372 states and 253976 transitions. [2021-06-05 17:03:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:03:18,066 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 [2021-06-05 17:03:18,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:18,258 INFO L225 Difference]: With dead ends: 67372 [2021-06-05 17:03:18,258 INFO L226 Difference]: Without dead ends: 67348 [2021-06-05 17:03:18,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 584.6ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:03:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67348 states. [2021-06-05 17:03:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67348 to 50281. [2021-06-05 17:03:19,782 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) [2021-06-05 17:03:20,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50281 states to 50281 states and 195082 transitions. [2021-06-05 17:03:20,235 INFO L78 Accepts]: Start accepts. Automaton has 50281 states and 195082 transitions. Word has length 28 [2021-06-05 17:03:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:20,236 INFO L482 AbstractCegarLoop]: Abstraction has 50281 states and 195082 transitions. [2021-06-05 17:03:20,236 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) [2021-06-05 17:03:20,236 INFO L276 IsEmpty]: Start isEmpty. Operand 50281 states and 195082 transitions. [2021-06-05 17:03:20,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:20,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:20,318 INFO L521 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] [2021-06-05 17:03:20,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 17:03:20,519 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:20,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-06-05 17:03:20,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:20,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907467997] [2021-06-05 17:03:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:20,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:20,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907467997] [2021-06-05 17:03:20,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907467997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:20,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893628650] [2021-06-05 17:03:20,557 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 [2021-06-05 17:03:20,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:03:20,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:20,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893628650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:20,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:20,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:03:20,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740817608] [2021-06-05 17:03:20,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:03:20,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:20,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:03:20,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:03:20,667 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) [2021-06-05 17:03:21,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:21,804 INFO L93 Difference]: Finished difference Result 68744 states and 257789 transitions. [2021-06-05 17:03:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:03:21,805 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 [2021-06-05 17:03:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:21,996 INFO L225 Difference]: With dead ends: 68744 [2021-06-05 17:03:21,996 INFO L226 Difference]: Without dead ends: 68704 [2021-06-05 17:03:21,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 550.9ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:03:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68704 states. [2021-06-05 17:03:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68704 to 50435. [2021-06-05 17:03:23,682 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) [2021-06-05 17:03:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50435 states to 50435 states and 195647 transitions. [2021-06-05 17:03:23,839 INFO L78 Accepts]: Start accepts. Automaton has 50435 states and 195647 transitions. Word has length 28 [2021-06-05 17:03:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:23,839 INFO L482 AbstractCegarLoop]: Abstraction has 50435 states and 195647 transitions. [2021-06-05 17:03:23,839 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) [2021-06-05 17:03:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 50435 states and 195647 transitions. [2021-06-05 17:03:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:23,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:23,920 INFO L521 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] [2021-06-05 17:03:24,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:24,120 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:24,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-06-05 17:03:24,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:24,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044336766] [2021-06-05 17:03:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:24,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:24,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044336766] [2021-06-05 17:03:24,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044336766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:24,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224521023] [2021-06-05 17:03:24,160 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 [2021-06-05 17:03:24,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:03:24,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:24,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:24,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224521023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:24,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:24,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:03:24,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566798490] [2021-06-05 17:03:24,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:24,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:24,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:24,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:24,291 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) [2021-06-05 17:03:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:26,110 INFO L93 Difference]: Finished difference Result 67858 states and 255155 transitions. [2021-06-05 17:03:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 17:03:26,110 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 [2021-06-05 17:03:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:26,296 INFO L225 Difference]: With dead ends: 67858 [2021-06-05 17:03:26,296 INFO L226 Difference]: Without dead ends: 67858 [2021-06-05 17:03:26,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 841.9ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 17:03:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67858 states. [2021-06-05 17:03:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67858 to 51340. [2021-06-05 17:03:27,658 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) [2021-06-05 17:03:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51340 states to 51340 states and 198718 transitions. [2021-06-05 17:03:27,813 INFO L78 Accepts]: Start accepts. Automaton has 51340 states and 198718 transitions. Word has length 28 [2021-06-05 17:03:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:27,814 INFO L482 AbstractCegarLoop]: Abstraction has 51340 states and 198718 transitions. [2021-06-05 17:03:27,814 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) [2021-06-05 17:03:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 51340 states and 198718 transitions. [2021-06-05 17:03:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:27,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:27,893 INFO L521 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] [2021-06-05 17:03:28,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 17:03:28,094 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:28,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-06-05 17:03:28,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:28,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769567020] [2021-06-05 17:03:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:28,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769567020] [2021-06-05 17:03:28,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769567020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656693939] [2021-06-05 17:03:28,133 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 [2021-06-05 17:03:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:28,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:28,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:28,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656693939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:28,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:28,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:03:28,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840353023] [2021-06-05 17:03:28,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:28,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:28,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:28,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:28,254 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) [2021-06-05 17:03:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:29,909 INFO L93 Difference]: Finished difference Result 67233 states and 253392 transitions. [2021-06-05 17:03:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:03:29,909 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 [2021-06-05 17:03:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:30,094 INFO L225 Difference]: With dead ends: 67233 [2021-06-05 17:03:30,094 INFO L226 Difference]: Without dead ends: 67225 [2021-06-05 17:03:30,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 669.1ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:03:30,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67225 states. [2021-06-05 17:03:31,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67225 to 51264. [2021-06-05 17:03:31,580 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) [2021-06-05 17:03:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51264 states to 51264 states and 198482 transitions. [2021-06-05 17:03:31,734 INFO L78 Accepts]: Start accepts. Automaton has 51264 states and 198482 transitions. Word has length 28 [2021-06-05 17:03:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:31,734 INFO L482 AbstractCegarLoop]: Abstraction has 51264 states and 198482 transitions. [2021-06-05 17:03:31,734 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) [2021-06-05 17:03:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 51264 states and 198482 transitions. [2021-06-05 17:03:31,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:31,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:31,811 INFO L521 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] [2021-06-05 17:03:32,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 17:03:32,012 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:32,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-06-05 17:03:32,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:32,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268107411] [2021-06-05 17:03:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:32,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:32,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268107411] [2021-06-05 17:03:32,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268107411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:32,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297469487] [2021-06-05 17:03:32,069 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 [2021-06-05 17:03:32,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:32,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:32,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:32,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:32,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297469487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:32,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:32,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:03:32,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029956766] [2021-06-05 17:03:32,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:03:32,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:32,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:03:32,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:03:32,181 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) [2021-06-05 17:03:33,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:33,768 INFO L93 Difference]: Finished difference Result 66710 states and 252146 transitions. [2021-06-05 17:03:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:03:33,768 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 [2021-06-05 17:03:33,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:33,974 INFO L225 Difference]: With dead ends: 66710 [2021-06-05 17:03:33,975 INFO L226 Difference]: Without dead ends: 66686 [2021-06-05 17:03:33,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 564.4ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:03:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66686 states. [2021-06-05 17:03:35,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66686 to 51250. [2021-06-05 17:03:35,486 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) [2021-06-05 17:03:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51250 states to 51250 states and 198427 transitions. [2021-06-05 17:03:35,644 INFO L78 Accepts]: Start accepts. Automaton has 51250 states and 198427 transitions. Word has length 28 [2021-06-05 17:03:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:35,644 INFO L482 AbstractCegarLoop]: Abstraction has 51250 states and 198427 transitions. [2021-06-05 17:03:35,644 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) [2021-06-05 17:03:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 51250 states and 198427 transitions. [2021-06-05 17:03:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:35,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:35,728 INFO L521 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] [2021-06-05 17:03:35,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 17:03:35,929 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:35,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:35,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-06-05 17:03:35,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:35,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017037613] [2021-06-05 17:03:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:35,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:35,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017037613] [2021-06-05 17:03:35,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017037613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:35,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369915577] [2021-06-05 17:03:35,987 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 [2021-06-05 17:03:36,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:03:36,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:36,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:36,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:36,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369915577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:36,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:36,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:03:36,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018701417] [2021-06-05 17:03:36,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:03:36,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:36,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:03:36,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:03:36,103 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) [2021-06-05 17:03:37,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:37,467 INFO L93 Difference]: Finished difference Result 66492 states and 251453 transitions. [2021-06-05 17:03:37,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 17:03:37,468 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 [2021-06-05 17:03:37,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:37,647 INFO L225 Difference]: With dead ends: 66492 [2021-06-05 17:03:37,647 INFO L226 Difference]: Without dead ends: 66452 [2021-06-05 17:03:37,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 552.7ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:03:37,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66452 states. [2021-06-05 17:03:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66452 to 51599. [2021-06-05 17:03:39,094 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) [2021-06-05 17:03:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51599 states to 51599 states and 199856 transitions. [2021-06-05 17:03:39,252 INFO L78 Accepts]: Start accepts. Automaton has 51599 states and 199856 transitions. Word has length 28 [2021-06-05 17:03:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:39,253 INFO L482 AbstractCegarLoop]: Abstraction has 51599 states and 199856 transitions. [2021-06-05 17:03:39,253 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) [2021-06-05 17:03:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 51599 states and 199856 transitions. [2021-06-05 17:03:39,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:39,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:39,333 INFO L521 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] [2021-06-05 17:03:39,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:39,534 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:39,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-06-05 17:03:39,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:39,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391296375] [2021-06-05 17:03:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:39,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:39,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391296375] [2021-06-05 17:03:39,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391296375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:39,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131243609] [2021-06-05 17:03:39,572 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 [2021-06-05 17:03:39,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:39,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:39,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:39,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:39,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131243609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:39,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:39,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:03:39,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405902984] [2021-06-05 17:03:39,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:03:39,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:39,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:03:39,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:03:39,978 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) [2021-06-05 17:03:41,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:41,246 INFO L93 Difference]: Finished difference Result 80755 states and 301894 transitions. [2021-06-05 17:03:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:03:41,247 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 [2021-06-05 17:03:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:41,465 INFO L225 Difference]: With dead ends: 80755 [2021-06-05 17:03:41,465 INFO L226 Difference]: Without dead ends: 80755 [2021-06-05 17:03:41,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:03:41,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80755 states. [2021-06-05 17:03:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80755 to 52765. [2021-06-05 17:03:43,284 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) [2021-06-05 17:03:43,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52765 states to 52765 states and 205011 transitions. [2021-06-05 17:03:43,457 INFO L78 Accepts]: Start accepts. Automaton has 52765 states and 205011 transitions. Word has length 28 [2021-06-05 17:03:43,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:43,457 INFO L482 AbstractCegarLoop]: Abstraction has 52765 states and 205011 transitions. [2021-06-05 17:03:43,457 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) [2021-06-05 17:03:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 52765 states and 205011 transitions. [2021-06-05 17:03:43,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:43,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:43,550 INFO L521 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] [2021-06-05 17:03:43,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:43,750 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:43,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:43,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-06-05 17:03:43,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:43,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459816576] [2021-06-05 17:03:43,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:43,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:43,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459816576] [2021-06-05 17:03:43,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459816576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:43,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546139820] [2021-06-05 17:03:43,795 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 [2021-06-05 17:03:43,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:03:43,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:43,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:43,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:43,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546139820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:43,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:43,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:03:43,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640305327] [2021-06-05 17:03:43,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:03:43,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:43,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:03:43,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:03:43,933 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) [2021-06-05 17:03:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:45,134 INFO L93 Difference]: Finished difference Result 73770 states and 279838 transitions. [2021-06-05 17:03:45,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:03:45,134 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 [2021-06-05 17:03:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:45,718 INFO L225 Difference]: With dead ends: 73770 [2021-06-05 17:03:45,718 INFO L226 Difference]: Without dead ends: 73770 [2021-06-05 17:03:45,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 557.6ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:03:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73770 states. [2021-06-05 17:03:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73770 to 52795. [2021-06-05 17:03:47,131 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) [2021-06-05 17:03:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52795 states to 52795 states and 205118 transitions. [2021-06-05 17:03:47,303 INFO L78 Accepts]: Start accepts. Automaton has 52795 states and 205118 transitions. Word has length 28 [2021-06-05 17:03:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:47,303 INFO L482 AbstractCegarLoop]: Abstraction has 52795 states and 205118 transitions. [2021-06-05 17:03:47,304 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) [2021-06-05 17:03:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 52795 states and 205118 transitions. [2021-06-05 17:03:47,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:47,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:47,388 INFO L521 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] [2021-06-05 17:03:47,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:47,589 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:47,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:47,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-06-05 17:03:47,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:47,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326393278] [2021-06-05 17:03:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:47,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:47,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326393278] [2021-06-05 17:03:47,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326393278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:47,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643230695] [2021-06-05 17:03:47,627 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 [2021-06-05 17:03:47,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:03:47,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:47,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:47,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:47,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643230695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:47,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:47,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:03:47,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145293258] [2021-06-05 17:03:47,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:47,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:47,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:47,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:47,753 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) [2021-06-05 17:03:49,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:49,702 INFO L93 Difference]: Finished difference Result 74806 states and 282789 transitions. [2021-06-05 17:03:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:03:49,703 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 [2021-06-05 17:03:49,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:49,906 INFO L225 Difference]: With dead ends: 74806 [2021-06-05 17:03:49,906 INFO L226 Difference]: Without dead ends: 74806 [2021-06-05 17:03:49,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 921.5ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 17:03:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74806 states. [2021-06-05 17:03:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74806 to 53059. [2021-06-05 17:03:51,493 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) [2021-06-05 17:03:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53059 states to 53059 states and 205976 transitions. [2021-06-05 17:03:51,653 INFO L78 Accepts]: Start accepts. Automaton has 53059 states and 205976 transitions. Word has length 28 [2021-06-05 17:03:51,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:51,653 INFO L482 AbstractCegarLoop]: Abstraction has 53059 states and 205976 transitions. [2021-06-05 17:03:51,653 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) [2021-06-05 17:03:51,653 INFO L276 IsEmpty]: Start isEmpty. Operand 53059 states and 205976 transitions. [2021-06-05 17:03:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:51,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:51,735 INFO L521 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] [2021-06-05 17:03:51,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 17:03:51,937 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:51,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:51,937 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-06-05 17:03:51,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:51,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211292853] [2021-06-05 17:03:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:51,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:51,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211292853] [2021-06-05 17:03:51,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211292853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:51,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861213514] [2021-06-05 17:03:51,974 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 [2021-06-05 17:03:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:51,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:51,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:52,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861213514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:52,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:52,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:03:52,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160673238] [2021-06-05 17:03:52,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:52,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:52,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:52,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:52,094 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) [2021-06-05 17:03:53,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:53,818 INFO L93 Difference]: Finished difference Result 73815 states and 279970 transitions. [2021-06-05 17:03:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:03:53,818 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 [2021-06-05 17:03:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:54,029 INFO L225 Difference]: With dead ends: 73815 [2021-06-05 17:03:54,029 INFO L226 Difference]: Without dead ends: 73811 [2021-06-05 17:03:54,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 1015.9ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:03:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73811 states. [2021-06-05 17:03:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73811 to 52695. [2021-06-05 17:03:55,640 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) [2021-06-05 17:03:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52695 states to 52695 states and 204740 transitions. [2021-06-05 17:03:56,066 INFO L78 Accepts]: Start accepts. Automaton has 52695 states and 204740 transitions. Word has length 28 [2021-06-05 17:03:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:56,066 INFO L482 AbstractCegarLoop]: Abstraction has 52695 states and 204740 transitions. [2021-06-05 17:03:56,066 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) [2021-06-05 17:03:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 52695 states and 204740 transitions. [2021-06-05 17:03:56,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:56,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:56,157 INFO L521 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] [2021-06-05 17:03:56,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 17:03:56,357 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:56,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-06-05 17:03:56,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:56,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638538940] [2021-06-05 17:03:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:56,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:56,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638538940] [2021-06-05 17:03:56,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638538940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:56,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845069962] [2021-06-05 17:03:56,396 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 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 [2021-06-05 17:03:56,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:56,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:56,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:56,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:56,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845069962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:56,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:56,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:03:56,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761325109] [2021-06-05 17:03:56,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:03:56,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:56,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:03:56,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:03:56,514 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) [2021-06-05 17:03:57,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:57,437 INFO L93 Difference]: Finished difference Result 67805 states and 258963 transitions. [2021-06-05 17:03:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:03:57,438 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 [2021-06-05 17:03:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:57,628 INFO L225 Difference]: With dead ends: 67805 [2021-06-05 17:03:57,628 INFO L226 Difference]: Without dead ends: 67805 [2021-06-05 17:03:57,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 468.0ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:03:57,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67805 states. [2021-06-05 17:03:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67805 to 52711. [2021-06-05 17:03:59,377 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) [2021-06-05 17:03:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52711 states to 52711 states and 204888 transitions. [2021-06-05 17:03:59,549 INFO L78 Accepts]: Start accepts. Automaton has 52711 states and 204888 transitions. Word has length 28 [2021-06-05 17:03:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:59,549 INFO L482 AbstractCegarLoop]: Abstraction has 52711 states and 204888 transitions. [2021-06-05 17:03:59,549 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) [2021-06-05 17:03:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 52711 states and 204888 transitions. [2021-06-05 17:03:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:59,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:59,636 INFO L521 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] [2021-06-05 17:03:59,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 17:03:59,836 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-06-05 17:03:59,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:59,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424413537] [2021-06-05 17:03:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:59,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:59,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424413537] [2021-06-05 17:03:59,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424413537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:59,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358116280] [2021-06-05 17:03:59,875 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 [2021-06-05 17:03:59,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:03:59,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:59,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:59,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:59,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358116280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:59,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:59,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:03:59,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629968074] [2021-06-05 17:03:59,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:03:59,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:59,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:03:59,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:03:59,985 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) [2021-06-05 17:04:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:00,807 INFO L93 Difference]: Finished difference Result 66995 states and 256734 transitions. [2021-06-05 17:04:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:04:00,808 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 [2021-06-05 17:04:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:00,998 INFO L225 Difference]: With dead ends: 66995 [2021-06-05 17:04:00,998 INFO L226 Difference]: Without dead ends: 66983 [2021-06-05 17:04:00,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:04:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66983 states. [2021-06-05 17:04:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66983 to 52645. [2021-06-05 17:04:02,834 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) [2021-06-05 17:04:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52645 states to 52645 states and 204685 transitions. [2021-06-05 17:04:03,000 INFO L78 Accepts]: Start accepts. Automaton has 52645 states and 204685 transitions. Word has length 28 [2021-06-05 17:04:03,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:03,000 INFO L482 AbstractCegarLoop]: Abstraction has 52645 states and 204685 transitions. [2021-06-05 17:04:03,000 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) [2021-06-05 17:04:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 52645 states and 204685 transitions. [2021-06-05 17:04:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:03,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:03,084 INFO L521 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] [2021-06-05 17:04:03,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 17:04:03,284 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:03,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:03,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-06-05 17:04:03,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:03,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130652943] [2021-06-05 17:04:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:03,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:03,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130652943] [2021-06-05 17:04:03,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130652943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:03,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044213053] [2021-06-05 17:04:03,325 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 [2021-06-05 17:04:03,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:03,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:03,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:03,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:03,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044213053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:03,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:03,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:04:03,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038785683] [2021-06-05 17:04:03,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:03,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:03,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:03,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:03,451 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) [2021-06-05 17:04:04,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:04,146 INFO L93 Difference]: Finished difference Result 57259 states and 219875 transitions. [2021-06-05 17:04:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:04:04,146 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 [2021-06-05 17:04:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:04,305 INFO L225 Difference]: With dead ends: 57259 [2021-06-05 17:04:04,305 INFO L226 Difference]: Without dead ends: 57259 [2021-06-05 17:04:04,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 327.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:04:04,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57259 states. [2021-06-05 17:04:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57259 to 52853. [2021-06-05 17:04:05,715 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) [2021-06-05 17:04:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52853 states to 52853 states and 205377 transitions. [2021-06-05 17:04:06,220 INFO L78 Accepts]: Start accepts. Automaton has 52853 states and 205377 transitions. Word has length 28 [2021-06-05 17:04:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:06,220 INFO L482 AbstractCegarLoop]: Abstraction has 52853 states and 205377 transitions. [2021-06-05 17:04:06,220 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) [2021-06-05 17:04:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 52853 states and 205377 transitions. [2021-06-05 17:04:06,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:06,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:06,319 INFO L521 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] [2021-06-05 17:04:06,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-05 17:04:06,519 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:06,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:06,520 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-06-05 17:04:06,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:06,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805758035] [2021-06-05 17:04:06,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:06,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:06,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805758035] [2021-06-05 17:04:06,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805758035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:06,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830556893] [2021-06-05 17:04:06,555 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 [2021-06-05 17:04:06,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:04:06,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:06,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:06,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:06,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830556893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:06,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:06,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:04:06,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353121075] [2021-06-05 17:04:06,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:04:06,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:06,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:04:06,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:04:06,663 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) [2021-06-05 17:04:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:07,296 INFO L93 Difference]: Finished difference Result 57070 states and 219367 transitions. [2021-06-05 17:04:07,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:04:07,296 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 [2021-06-05 17:04:07,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:07,458 INFO L225 Difference]: With dead ends: 57070 [2021-06-05 17:04:07,459 INFO L226 Difference]: Without dead ends: 57066 [2021-06-05 17:04:07,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:04:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57066 states. [2021-06-05 17:04:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57066 to 52793. [2021-06-05 17:04:08,784 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) [2021-06-05 17:04:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52793 states to 52793 states and 205185 transitions. [2021-06-05 17:04:08,945 INFO L78 Accepts]: Start accepts. Automaton has 52793 states and 205185 transitions. Word has length 28 [2021-06-05 17:04:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:08,945 INFO L482 AbstractCegarLoop]: Abstraction has 52793 states and 205185 transitions. [2021-06-05 17:04:08,945 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) [2021-06-05 17:04:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 52793 states and 205185 transitions. [2021-06-05 17:04:09,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:09,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:09,031 INFO L521 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] [2021-06-05 17:04:09,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:09,232 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:09,232 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 87 times [2021-06-05 17:04:09,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:09,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718697427] [2021-06-05 17:04:09,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:09,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:09,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718697427] [2021-06-05 17:04:09,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718697427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:09,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180820989] [2021-06-05 17:04:09,273 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 [2021-06-05 17:04:09,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:04:09,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:09,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:09,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:09,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180820989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:09,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:09,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 17:04:09,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967632018] [2021-06-05 17:04:09,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:04:09,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:09,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:04:09,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:09,354 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) [2021-06-05 17:04:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:10,228 INFO L93 Difference]: Finished difference Result 57147 states and 219589 transitions. [2021-06-05 17:04:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:04:10,229 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 [2021-06-05 17:04:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:10,390 INFO L225 Difference]: With dead ends: 57147 [2021-06-05 17:04:10,390 INFO L226 Difference]: Without dead ends: 57147 [2021-06-05 17:04:10,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:04:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57147 states. [2021-06-05 17:04:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57147 to 52913. [2021-06-05 17:04:11,653 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) [2021-06-05 17:04:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52913 states to 52913 states and 205553 transitions. [2021-06-05 17:04:11,810 INFO L78 Accepts]: Start accepts. Automaton has 52913 states and 205553 transitions. Word has length 28 [2021-06-05 17:04:11,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:11,811 INFO L482 AbstractCegarLoop]: Abstraction has 52913 states and 205553 transitions. [2021-06-05 17:04:11,811 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) [2021-06-05 17:04:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 52913 states and 205553 transitions. [2021-06-05 17:04:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:11,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:11,891 INFO L521 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] [2021-06-05 17:04:12,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 17:04:12,093 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:12,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:12,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 88 times [2021-06-05 17:04:12,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:12,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500764438] [2021-06-05 17:04:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:04:12,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:12,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500764438] [2021-06-05 17:04:12,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500764438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:12,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033755133] [2021-06-05 17:04:12,128 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 [2021-06-05 17:04:12,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:12,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:12,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:12,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:04:12,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033755133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:12,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:12,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 17:04:12,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855975745] [2021-06-05 17:04:12,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:04:12,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:12,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:04:12,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:04:12,203 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) [2021-06-05 17:04:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:13,038 INFO L93 Difference]: Finished difference Result 57331 states and 220238 transitions. [2021-06-05 17:04:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:04:13,053 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 [2021-06-05 17:04:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:13,265 INFO L225 Difference]: With dead ends: 57331 [2021-06-05 17:04:13,265 INFO L226 Difference]: Without dead ends: 57319 [2021-06-05 17:04:13,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:04:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57319 states. [2021-06-05 17:04:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57319 to 53047. [2021-06-05 17:04:14,591 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) [2021-06-05 17:04:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53047 states to 53047 states and 205988 transitions. [2021-06-05 17:04:14,753 INFO L78 Accepts]: Start accepts. Automaton has 53047 states and 205988 transitions. Word has length 28 [2021-06-05 17:04:14,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:14,754 INFO L482 AbstractCegarLoop]: Abstraction has 53047 states and 205988 transitions. [2021-06-05 17:04:14,754 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) [2021-06-05 17:04:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 53047 states and 205988 transitions. [2021-06-05 17:04:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:14,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:14,837 INFO L521 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] [2021-06-05 17:04:15,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:15,038 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:15,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:15,038 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 89 times [2021-06-05 17:04:15,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:15,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522193643] [2021-06-05 17:04:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:15,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:15,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522193643] [2021-06-05 17:04:15,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522193643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:15,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754229852] [2021-06-05 17:04:15,076 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 [2021-06-05 17:04:15,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:04:15,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:15,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:15,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:15,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754229852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:15,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:15,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 17:04:15,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414489305] [2021-06-05 17:04:15,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:04:15,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:15,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:04:15,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:15,153 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) [2021-06-05 17:04:15,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:15,700 INFO L93 Difference]: Finished difference Result 57295 states and 220154 transitions. [2021-06-05 17:04:15,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:04:15,700 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 [2021-06-05 17:04:15,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:15,856 INFO L225 Difference]: With dead ends: 57295 [2021-06-05 17:04:15,856 INFO L226 Difference]: Without dead ends: 57275 [2021-06-05 17:04:15,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:04:15,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57275 states. [2021-06-05 17:04:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57275 to 53047. [2021-06-05 17:04:17,257 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) [2021-06-05 17:04:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53047 states to 53047 states and 205984 transitions. [2021-06-05 17:04:17,789 INFO L78 Accepts]: Start accepts. Automaton has 53047 states and 205984 transitions. Word has length 28 [2021-06-05 17:04:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:17,789 INFO L482 AbstractCegarLoop]: Abstraction has 53047 states and 205984 transitions. [2021-06-05 17:04:17,789 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) [2021-06-05 17:04:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 53047 states and 205984 transitions. [2021-06-05 17:04:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:17,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:17,888 INFO L521 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] [2021-06-05 17:04:18,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 17:04:18,093 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:18,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-06-05 17:04:18,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:18,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253466138] [2021-06-05 17:04:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:18,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:18,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253466138] [2021-06-05 17:04:18,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253466138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:18,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055153601] [2021-06-05 17:04:18,128 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 [2021-06-05 17:04:18,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:18,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:18,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:04:18,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:18,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055153601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:18,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:18,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:04:18,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817350532] [2021-06-05 17:04:18,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:18,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:18,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:18,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:18,224 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) [2021-06-05 17:04:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:18,772 INFO L93 Difference]: Finished difference Result 58008 states and 223549 transitions. [2021-06-05 17:04:18,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:04:18,772 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 [2021-06-05 17:04:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:18,936 INFO L225 Difference]: With dead ends: 58008 [2021-06-05 17:04:18,936 INFO L226 Difference]: Without dead ends: 57995 [2021-06-05 17:04:18,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:04:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57995 states. [2021-06-05 17:04:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57995 to 55780. [2021-06-05 17:04:20,255 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) [2021-06-05 17:04:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55780 states to 55780 states and 216972 transitions. [2021-06-05 17:04:20,423 INFO L78 Accepts]: Start accepts. Automaton has 55780 states and 216972 transitions. Word has length 28 [2021-06-05 17:04:20,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:20,424 INFO L482 AbstractCegarLoop]: Abstraction has 55780 states and 216972 transitions. [2021-06-05 17:04:20,424 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) [2021-06-05 17:04:20,424 INFO L276 IsEmpty]: Start isEmpty. Operand 55780 states and 216972 transitions. [2021-06-05 17:04:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:20,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:20,524 INFO L521 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] [2021-06-05 17:04:20,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:20,725 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:20,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:20,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-06-05 17:04:20,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:20,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121580077] [2021-06-05 17:04:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:20,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:20,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121580077] [2021-06-05 17:04:20,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121580077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:20,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518673181] [2021-06-05 17:04:20,759 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 [2021-06-05 17:04:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:20,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:04:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:20,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518673181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:20,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:20,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:04:20,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952907776] [2021-06-05 17:04:20,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:20,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:20,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:20,848 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) [2021-06-05 17:04:21,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:21,689 INFO L93 Difference]: Finished difference Result 61738 states and 236391 transitions. [2021-06-05 17:04:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:04:21,689 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 [2021-06-05 17:04:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:21,864 INFO L225 Difference]: With dead ends: 61738 [2021-06-05 17:04:21,864 INFO L226 Difference]: Without dead ends: 61738 [2021-06-05 17:04:21,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:04:21,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61738 states. [2021-06-05 17:04:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61738 to 49367. [2021-06-05 17:04:23,118 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) [2021-06-05 17:04:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49367 states to 49367 states and 191487 transitions. [2021-06-05 17:04:23,269 INFO L78 Accepts]: Start accepts. Automaton has 49367 states and 191487 transitions. Word has length 28 [2021-06-05 17:04:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:23,269 INFO L482 AbstractCegarLoop]: Abstraction has 49367 states and 191487 transitions. [2021-06-05 17:04:23,269 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) [2021-06-05 17:04:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 49367 states and 191487 transitions. [2021-06-05 17:04:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:23,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:23,347 INFO L521 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] [2021-06-05 17:04:23,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:23,548 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:23,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:23,548 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-06-05 17:04:23,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:23,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598581511] [2021-06-05 17:04:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:23,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:23,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598581511] [2021-06-05 17:04:23,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598581511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:23,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884467052] [2021-06-05 17:04:23,582 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 [2021-06-05 17:04:23,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:23,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:23,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:04:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:23,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884467052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:23,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:23,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:04:23,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968139155] [2021-06-05 17:04:23,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:23,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:23,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:23,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:23,676 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) [2021-06-05 17:04:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:24,263 INFO L93 Difference]: Finished difference Result 54325 states and 208211 transitions. [2021-06-05 17:04:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:04:24,263 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 [2021-06-05 17:04:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:24,793 INFO L225 Difference]: With dead ends: 54325 [2021-06-05 17:04:24,794 INFO L226 Difference]: Without dead ends: 54325 [2021-06-05 17:04:24,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:04:24,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54325 states. [2021-06-05 17:04:25,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54325 to 50200. [2021-06-05 17:04:25,728 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) [2021-06-05 17:04:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50200 states to 50200 states and 194645 transitions. [2021-06-05 17:04:26,223 INFO L78 Accepts]: Start accepts. Automaton has 50200 states and 194645 transitions. Word has length 28 [2021-06-05 17:04:26,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:26,223 INFO L482 AbstractCegarLoop]: Abstraction has 50200 states and 194645 transitions. [2021-06-05 17:04:26,223 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) [2021-06-05 17:04:26,223 INFO L276 IsEmpty]: Start isEmpty. Operand 50200 states and 194645 transitions. [2021-06-05 17:04:26,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:26,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:26,307 INFO L521 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] [2021-06-05 17:04:26,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:26,507 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:26,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:26,508 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-06-05 17:04:26,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:26,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282026385] [2021-06-05 17:04:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:26,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:26,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282026385] [2021-06-05 17:04:26,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282026385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:26,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169300496] [2021-06-05 17:04:26,549 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 [2021-06-05 17:04:26,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:04:26,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:26,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:04:26,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:26,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169300496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:26,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:26,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:04:26,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771759060] [2021-06-05 17:04:26,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:26,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:26,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:26,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:26,637 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) [2021-06-05 17:04:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:27,115 INFO L93 Difference]: Finished difference Result 52033 states and 200786 transitions. [2021-06-05 17:04:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:04:27,115 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 [2021-06-05 17:04:27,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:27,261 INFO L225 Difference]: With dead ends: 52033 [2021-06-05 17:04:27,261 INFO L226 Difference]: Without dead ends: 52033 [2021-06-05 17:04:27,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:04:27,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52033 states. [2021-06-05 17:04:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52033 to 50208. [2021-06-05 17:04:28,459 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) [2021-06-05 17:04:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50208 states to 50208 states and 194669 transitions. [2021-06-05 17:04:28,613 INFO L78 Accepts]: Start accepts. Automaton has 50208 states and 194669 transitions. Word has length 28 [2021-06-05 17:04:28,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:28,613 INFO L482 AbstractCegarLoop]: Abstraction has 50208 states and 194669 transitions. [2021-06-05 17:04:28,613 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) [2021-06-05 17:04:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 50208 states and 194669 transitions. [2021-06-05 17:04:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:28,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:28,692 INFO L521 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] [2021-06-05 17:04:28,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 17:04:28,893 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:28,893 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-06-05 17:04:28,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:28,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825530830] [2021-06-05 17:04:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:28,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:28,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825530830] [2021-06-05 17:04:28,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825530830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:28,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332357392] [2021-06-05 17:04:28,930 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 [2021-06-05 17:04:28,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:28,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:28,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:04:28,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:29,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332357392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:29,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:29,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:04:29,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694920951] [2021-06-05 17:04:29,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:04:29,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:29,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:04:29,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:04:29,019 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) [2021-06-05 17:04:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:29,832 INFO L93 Difference]: Finished difference Result 51753 states and 199864 transitions. [2021-06-05 17:04:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:04:29,833 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 [2021-06-05 17:04:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:29,971 INFO L225 Difference]: With dead ends: 51753 [2021-06-05 17:04:29,972 INFO L226 Difference]: Without dead ends: 51753 [2021-06-05 17:04:29,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:04:30,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51753 states. [2021-06-05 17:04:31,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51753 to 50102. [2021-06-05 17:04:31,182 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) [2021-06-05 17:04:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50102 states to 50102 states and 194245 transitions. [2021-06-05 17:04:31,336 INFO L78 Accepts]: Start accepts. Automaton has 50102 states and 194245 transitions. Word has length 28 [2021-06-05 17:04:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:31,336 INFO L482 AbstractCegarLoop]: Abstraction has 50102 states and 194245 transitions. [2021-06-05 17:04:31,336 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) [2021-06-05 17:04:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 50102 states and 194245 transitions. [2021-06-05 17:04:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:04:31,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:31,420 INFO L521 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] [2021-06-05 17:04:31,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:31,621 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-06-05 17:04:31,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:31,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405881916] [2021-06-05 17:04:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:31,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:31,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405881916] [2021-06-05 17:04:31,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405881916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:31,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012071651] [2021-06-05 17:04:31,833 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 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 [2021-06-05 17:04:31,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:04:31,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:31,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:04:31,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:32,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:32,279 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 [2021-06-05 17:04:32,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:32,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:32,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:32,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:5 [2021-06-05 17:04:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:32,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012071651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:32,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:32,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:04:32,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029516250] [2021-06-05 17:04:32,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:04:32,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:32,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:04:32,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:04:32,302 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) [2021-06-05 17:04:34,209 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-05 17:04:35,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:35,735 INFO L93 Difference]: Finished difference Result 58226 states and 218118 transitions. [2021-06-05 17:04:35,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:04:35,736 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 [2021-06-05 17:04:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:35,889 INFO L225 Difference]: With dead ends: 58226 [2021-06-05 17:04:35,889 INFO L226 Difference]: Without dead ends: 58196 [2021-06-05 17:04:35,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2842.9ms TimeCoverageRelationStatistics Valid=432, Invalid=2430, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:04:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58196 states. [2021-06-05 17:04:37,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58196 to 50237. [2021-06-05 17:04:37,062 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) [2021-06-05 17:04:37,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50237 states to 50237 states and 194730 transitions. [2021-06-05 17:04:37,223 INFO L78 Accepts]: Start accepts. Automaton has 50237 states and 194730 transitions. Word has length 30 [2021-06-05 17:04:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:37,223 INFO L482 AbstractCegarLoop]: Abstraction has 50237 states and 194730 transitions. [2021-06-05 17:04:37,223 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) [2021-06-05 17:04:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 50237 states and 194730 transitions. [2021-06-05 17:04:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:04:37,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:37,307 INFO L521 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] [2021-06-05 17:04:37,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 17:04:37,507 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:37,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:37,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-06-05 17:04:37,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:37,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309835154] [2021-06-05 17:04:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:37,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:37,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309835154] [2021-06-05 17:04:37,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309835154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:37,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792921540] [2021-06-05 17:04:37,715 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) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:37,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:04:37,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:37,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:04:37,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:38,310 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 17:04:38,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 17:04:38,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:38,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:38,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:38,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 17:04:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:38,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792921540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:38,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:38,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:04:38,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432831071] [2021-06-05 17:04:38,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:04:38,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:38,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:04:38,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:04:38,337 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) [2021-06-05 17:04:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:40,677 INFO L93 Difference]: Finished difference Result 58234 states and 218176 transitions. [2021-06-05 17:04:40,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:04:40,678 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 [2021-06-05 17:04:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:40,829 INFO L225 Difference]: With dead ends: 58234 [2021-06-05 17:04:40,829 INFO L226 Difference]: Without dead ends: 58204 [2021-06-05 17:04:40,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2121.0ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:04:41,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58204 states. [2021-06-05 17:04:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58204 to 50243. [2021-06-05 17:04:41,932 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) [2021-06-05 17:04:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50243 states to 50243 states and 194755 transitions. [2021-06-05 17:04:42,324 INFO L78 Accepts]: Start accepts. Automaton has 50243 states and 194755 transitions. Word has length 30 [2021-06-05 17:04:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:42,324 INFO L482 AbstractCegarLoop]: Abstraction has 50243 states and 194755 transitions. [2021-06-05 17:04:42,324 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) [2021-06-05 17:04:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 50243 states and 194755 transitions. [2021-06-05 17:04:42,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:04:42,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:42,408 INFO L521 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] [2021-06-05 17:04:42,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 17:04:42,608 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:42,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 175 times [2021-06-05 17:04:42,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:42,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574372598] [2021-06-05 17:04:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:42,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:42,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574372598] [2021-06-05 17:04:42,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574372598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:42,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230958060] [2021-06-05 17:04:42,883 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 [2021-06-05 17:04:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:42,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:04:42,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:43,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:43,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:43,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:43,117 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 [2021-06-05 17:04:43,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:43,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:43,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:43,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:04:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:43,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230958060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:43,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:43,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 17:04:43,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113012580] [2021-06-05 17:04:43,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:04:43,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:43,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:04:43,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:04:43,140 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) [2021-06-05 17:04:44,474 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 17:04:45,132 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-06-05 17:04:45,759 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 17:04:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:46,911 INFO L93 Difference]: Finished difference Result 71226 states and 266663 transitions. [2021-06-05 17:04:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 17:04:46,912 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 [2021-06-05 17:04:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:47,102 INFO L225 Difference]: With dead ends: 71226 [2021-06-05 17:04:47,102 INFO L226 Difference]: Without dead ends: 71211 [2021-06-05 17:04:47,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 3155.8ms TimeCoverageRelationStatistics Valid=489, Invalid=3171, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:04:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71211 states. [2021-06-05 17:04:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71211 to 50282. [2021-06-05 17:04:48,389 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) [2021-06-05 17:04:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50282 states to 50282 states and 194893 transitions. [2021-06-05 17:04:48,554 INFO L78 Accepts]: Start accepts. Automaton has 50282 states and 194893 transitions. Word has length 30 [2021-06-05 17:04:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:48,554 INFO L482 AbstractCegarLoop]: Abstraction has 50282 states and 194893 transitions. [2021-06-05 17:04:48,554 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) [2021-06-05 17:04:48,554 INFO L276 IsEmpty]: Start isEmpty. Operand 50282 states and 194893 transitions. [2021-06-05 17:04:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:04:48,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:48,638 INFO L521 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] [2021-06-05 17:04:48,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:48,838 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:48,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:48,839 INFO L82 PathProgramCache]: Analyzing trace with hash -547667522, now seen corresponding path program 176 times [2021-06-05 17:04:48,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:48,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311772344] [2021-06-05 17:04:48,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:49,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:49,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311772344] [2021-06-05 17:04:49,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311772344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:49,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110295856] [2021-06-05 17:04:49,321 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 [2021-06-05 17:04:49,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:49,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:49,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:04:49,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:49,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:49,672 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 [2021-06-05 17:04:49,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:49,743 INFO L628 ElimStorePlain]: treesize reduction 51, result has 46.9 percent of original size [2021-06-05 17:04:49,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 17:04:49,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:108 [2021-06-05 17:04:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:49,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110295856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:49,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:49,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 17:04:49,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468008098] [2021-06-05 17:04:49,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:04:49,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:49,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:04:49,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:04:49,867 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) [2021-06-05 17:04:50,971 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-06-05 17:04:51,699 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 17:04:52,116 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 17:04:52,516 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-05 17:04:52,840 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 17:04:52,971 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 17:04:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:54,040 INFO L93 Difference]: Finished difference Result 60601 states and 225495 transitions. [2021-06-05 17:04:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:04:54,040 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 [2021-06-05 17:04:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:54,201 INFO L225 Difference]: With dead ends: 60601 [2021-06-05 17:04:54,201 INFO L226 Difference]: Without dead ends: 60571 [2021-06-05 17:04:54,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 3764.3ms TimeCoverageRelationStatistics Valid=665, Invalid=3757, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:04:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60571 states. [2021-06-05 17:04:55,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60571 to 50303. [2021-06-05 17:04:55,314 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) [2021-06-05 17:04:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50303 states to 50303 states and 194964 transitions. [2021-06-05 17:04:55,466 INFO L78 Accepts]: Start accepts. Automaton has 50303 states and 194964 transitions. Word has length 30 [2021-06-05 17:04:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:55,466 INFO L482 AbstractCegarLoop]: Abstraction has 50303 states and 194964 transitions. [2021-06-05 17:04:55,466 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) [2021-06-05 17:04:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 50303 states and 194964 transitions. [2021-06-05 17:04:55,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:04:55,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:55,548 INFO L521 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] [2021-06-05 17:04:55,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 17:04:55,748 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1002714042, now seen corresponding path program 177 times [2021-06-05 17:04:55,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:55,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180766240] [2021-06-05 17:04:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:56,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:56,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180766240] [2021-06-05 17:04:56,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180766240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:56,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123531622] [2021-06-05 17:04:56,022 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 [2021-06-05 17:04:56,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:04:56,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:56,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 17:04:56,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:56,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:56,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:56,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:56,286 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 [2021-06-05 17:04:56,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:56,335 INFO L628 ElimStorePlain]: treesize reduction 73, result has 25.5 percent of original size [2021-06-05 17:04:56,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:56,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:37 [2021-06-05 17:04:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:56,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123531622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:56,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:56,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:04:56,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389039283] [2021-06-05 17:04:56,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:04:56,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:56,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:04:56,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:04:56,406 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) [2021-06-05 17:04:56,732 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-06-05 17:04:58,071 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 17:04:58,318 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 17:04:58,991 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-05 17:04:59,315 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 17:04:59,518 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 17:04:59,751 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 17:05:00,236 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 17:05:01,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:01,668 INFO L93 Difference]: Finished difference Result 79320 states and 295712 transitions. [2021-06-05 17:05:01,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:05:01,669 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 [2021-06-05 17:05:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:01,884 INFO L225 Difference]: With dead ends: 79320 [2021-06-05 17:05:01,885 INFO L226 Difference]: Without dead ends: 79290 [2021-06-05 17:05:01,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 4384.7ms TimeCoverageRelationStatistics Valid=667, Invalid=5033, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 17:05:01,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79290 states. [2021-06-05 17:05:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79290 to 50315. [2021-06-05 17:05:03,182 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) [2021-06-05 17:05:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50315 states to 50315 states and 195014 transitions. [2021-06-05 17:05:03,338 INFO L78 Accepts]: Start accepts. Automaton has 50315 states and 195014 transitions. Word has length 30 [2021-06-05 17:05:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:03,338 INFO L482 AbstractCegarLoop]: Abstraction has 50315 states and 195014 transitions. [2021-06-05 17:05:03,338 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) [2021-06-05 17:05:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 50315 states and 195014 transitions. [2021-06-05 17:05:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:03,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:03,424 INFO L521 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] [2021-06-05 17:05:03,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:03,633 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:03,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2016530042, now seen corresponding path program 178 times [2021-06-05 17:05:03,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:03,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399043360] [2021-06-05 17:05:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:04,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:04,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399043360] [2021-06-05 17:05:04,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399043360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:04,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112315243] [2021-06-05 17:05:04,137 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 [2021-06-05 17:05:04,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:04,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:04,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:05:04,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:04,452 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 17:05:04,452 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 [2021-06-05 17:05:04,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:04,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:04,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:04,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 17:05:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:04,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112315243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:04,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:04,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:05:04,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820050858] [2021-06-05 17:05:04,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:05:04,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:04,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:05:04,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:05:04,478 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) [2021-06-05 17:05:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:07,346 INFO L93 Difference]: Finished difference Result 61699 states and 228811 transitions. [2021-06-05 17:05:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:05:07,347 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 [2021-06-05 17:05:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:07,504 INFO L225 Difference]: With dead ends: 61699 [2021-06-05 17:05:07,504 INFO L226 Difference]: Without dead ends: 61624 [2021-06-05 17:05:07,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2510.2ms TimeCoverageRelationStatistics Valid=551, Invalid=2419, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:05:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61624 states. [2021-06-05 17:05:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61624 to 50371. [2021-06-05 17:05:08,741 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) [2021-06-05 17:05:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50371 states to 50371 states and 195199 transitions. [2021-06-05 17:05:08,903 INFO L78 Accepts]: Start accepts. Automaton has 50371 states and 195199 transitions. Word has length 30 [2021-06-05 17:05:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:08,903 INFO L482 AbstractCegarLoop]: Abstraction has 50371 states and 195199 transitions. [2021-06-05 17:05:08,903 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) [2021-06-05 17:05:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 50371 states and 195199 transitions. [2021-06-05 17:05:08,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:08,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:08,989 INFO L521 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] [2021-06-05 17:05:09,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 17:05:09,190 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:09,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:09,190 INFO L82 PathProgramCache]: Analyzing trace with hash -728055690, now seen corresponding path program 179 times [2021-06-05 17:05:09,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:09,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630531085] [2021-06-05 17:05:09,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:09,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:09,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630531085] [2021-06-05 17:05:09,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630531085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:09,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713971967] [2021-06-05 17:05:09,477 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 [2021-06-05 17:05:09,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:05:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 17:05:09,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:09,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:09,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:09,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:09,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:09,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:09,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:09,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:09,866 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 [2021-06-05 17:05:09,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:09,880 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-06-05 17:05:09,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:09,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:5 [2021-06-05 17:05:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:09,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713971967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:09,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:09,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 17:05:09,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779128178] [2021-06-05 17:05:09,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:05:09,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:09,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:05:09,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:05:09,899 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) [2021-06-05 17:05:11,077 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 17:05:11,439 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 17:05:11,572 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-05 17:05:12,239 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-06-05 17:05:12,610 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-06-05 17:05:12,953 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-05 17:05:13,207 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 17:05:13,607 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 17:05:15,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:15,158 INFO L93 Difference]: Finished difference Result 71419 states and 267281 transitions. [2021-06-05 17:05:15,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 17:05:15,158 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 [2021-06-05 17:05:15,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:15,349 INFO L225 Difference]: With dead ends: 71419 [2021-06-05 17:05:15,349 INFO L226 Difference]: Without dead ends: 71404 [2021-06-05 17:05:15,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 4045.5ms TimeCoverageRelationStatistics Valid=568, Invalid=3854, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:05:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71404 states. [2021-06-05 17:05:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71404 to 50405. [2021-06-05 17:05:16,605 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) [2021-06-05 17:05:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50405 states to 50405 states and 195314 transitions. [2021-06-05 17:05:16,757 INFO L78 Accepts]: Start accepts. Automaton has 50405 states and 195314 transitions. Word has length 30 [2021-06-05 17:05:16,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:16,757 INFO L482 AbstractCegarLoop]: Abstraction has 50405 states and 195314 transitions. [2021-06-05 17:05:16,757 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) [2021-06-05 17:05:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 50405 states and 195314 transitions. [2021-06-05 17:05:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:16,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:16,839 INFO L521 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] [2021-06-05 17:05:17,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 17:05:17,039 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:17,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:17,040 INFO L82 PathProgramCache]: Analyzing trace with hash -610282946, now seen corresponding path program 180 times [2021-06-05 17:05:17,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:17,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889844204] [2021-06-05 17:05:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:17,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:17,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889844204] [2021-06-05 17:05:17,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889844204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:17,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675481437] [2021-06-05 17:05:17,221 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 [2021-06-05 17:05:17,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:05:17,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:17,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:05:17,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:17,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:17,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:17,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:17,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:17,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:17,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:17,511 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 [2021-06-05 17:05:17,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:17,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:17,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:17,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:05:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:17,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675481437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:17,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:17,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:05:17,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175189195] [2021-06-05 17:05:17,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:05:17,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:17,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:05:17,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:05:17,539 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) [2021-06-05 17:05:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:20,880 INFO L93 Difference]: Finished difference Result 83242 states and 309514 transitions. [2021-06-05 17:05:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 17:05:20,880 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 [2021-06-05 17:05:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:21,109 INFO L225 Difference]: With dead ends: 83242 [2021-06-05 17:05:21,110 INFO L226 Difference]: Without dead ends: 83227 [2021-06-05 17:05:21,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 2264.6ms TimeCoverageRelationStatistics Valid=401, Invalid=3259, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:05:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83227 states. [2021-06-05 17:05:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83227 to 50447. [2021-06-05 17:05:22,730 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) [2021-06-05 17:05:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50447 states to 50447 states and 195453 transitions. [2021-06-05 17:05:22,883 INFO L78 Accepts]: Start accepts. Automaton has 50447 states and 195453 transitions. Word has length 30 [2021-06-05 17:05:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:22,883 INFO L482 AbstractCegarLoop]: Abstraction has 50447 states and 195453 transitions. [2021-06-05 17:05:22,883 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) [2021-06-05 17:05:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 50447 states and 195453 transitions. [2021-06-05 17:05:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:22,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:22,962 INFO L521 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] [2021-06-05 17:05:23,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:23,163 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:23,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:23,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1538513590, now seen corresponding path program 181 times [2021-06-05 17:05:23,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:23,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957826993] [2021-06-05 17:05:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:23,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:23,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957826993] [2021-06-05 17:05:23,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957826993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:23,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310181675] [2021-06-05 17:05:23,335 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 [2021-06-05 17:05:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:23,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:05:23,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:23,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:23,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:23,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:23,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:23,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:23,643 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 [2021-06-05 17:05:23,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:23,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:23,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:23,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:05:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:23,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310181675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:23,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:23,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:05:23,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925190983] [2021-06-05 17:05:23,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:05:23,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:23,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:05:23,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:05:23,671 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) [2021-06-05 17:05:25,777 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-05 17:05:26,968 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 17:05:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:27,504 INFO L93 Difference]: Finished difference Result 94065 states and 345973 transitions. [2021-06-05 17:05:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 17:05:27,504 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 [2021-06-05 17:05:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:27,747 INFO L225 Difference]: With dead ends: 94065 [2021-06-05 17:05:27,747 INFO L226 Difference]: Without dead ends: 94014 [2021-06-05 17:05:27,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2916.3ms TimeCoverageRelationStatistics Valid=507, Invalid=3653, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:05:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94014 states. [2021-06-05 17:05:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94014 to 50456. [2021-06-05 17:05:29,799 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) [2021-06-05 17:05:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50456 states to 50456 states and 195492 transitions. [2021-06-05 17:05:29,962 INFO L78 Accepts]: Start accepts. Automaton has 50456 states and 195492 transitions. Word has length 30 [2021-06-05 17:05:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:29,963 INFO L482 AbstractCegarLoop]: Abstraction has 50456 states and 195492 transitions. [2021-06-05 17:05:29,963 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) [2021-06-05 17:05:29,963 INFO L276 IsEmpty]: Start isEmpty. Operand 50456 states and 195492 transitions. [2021-06-05 17:05:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:30,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:30,051 INFO L521 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] [2021-06-05 17:05:30,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:30,251 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:30,252 INFO L82 PathProgramCache]: Analyzing trace with hash -372848078, now seen corresponding path program 90 times [2021-06-05 17:05:30,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:30,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331112872] [2021-06-05 17:05:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:30,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:30,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331112872] [2021-06-05 17:05:30,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331112872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:30,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646072469] [2021-06-05 17:05:30,682 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 [2021-06-05 17:05:30,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:05:30,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:30,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:05:30,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:31,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:31,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:31,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:31,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:31,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:31,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:31,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:31,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:31,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:31,025 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 [2021-06-05 17:05:31,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:31,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:31,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:31,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:12 [2021-06-05 17:05:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:31,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646072469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:31,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:31,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:05:31,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582964888] [2021-06-05 17:05:31,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:05:31,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:31,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:05:31,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:05:31,052 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) [2021-06-05 17:05:32,182 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 17:05:32,790 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 17:05:33,421 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-05 17:05:33,640 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-05 17:05:33,863 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 17:05:34,052 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 17:05:36,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:36,115 INFO L93 Difference]: Finished difference Result 63848 states and 240271 transitions. [2021-06-05 17:05:36,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:05:36,116 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 [2021-06-05 17:05:36,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:36,292 INFO L225 Difference]: With dead ends: 63848 [2021-06-05 17:05:36,292 INFO L226 Difference]: Without dead ends: 63833 [2021-06-05 17:05:36,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 4214.7ms TimeCoverageRelationStatistics Valid=540, Invalid=3366, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:05:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63833 states. [2021-06-05 17:05:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63833 to 50491. [2021-06-05 17:05:37,518 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) [2021-06-05 17:05:37,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50491 states to 50491 states and 195578 transitions. [2021-06-05 17:05:37,672 INFO L78 Accepts]: Start accepts. Automaton has 50491 states and 195578 transitions. Word has length 30 [2021-06-05 17:05:37,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:37,672 INFO L482 AbstractCegarLoop]: Abstraction has 50491 states and 195578 transitions. [2021-06-05 17:05:37,672 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) [2021-06-05 17:05:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 50491 states and 195578 transitions. [2021-06-05 17:05:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:37,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:37,758 INFO L521 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] [2021-06-05 17:05:37,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:37,958 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:37,959 INFO L82 PathProgramCache]: Analyzing trace with hash -792944066, now seen corresponding path program 182 times [2021-06-05 17:05:37,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:37,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839406012] [2021-06-05 17:05:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:38,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:38,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839406012] [2021-06-05 17:05:38,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839406012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:38,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630756648] [2021-06-05 17:05:38,176 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 [2021-06-05 17:05:38,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:38,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:38,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:05:38,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:38,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:38,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:38,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:38,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:38,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:38,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:38,565 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 [2021-06-05 17:05:38,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:38,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:38,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:38,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:05:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:38,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630756648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:38,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:38,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:05:38,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457132966] [2021-06-05 17:05:38,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:05:38,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:38,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:05:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:05:38,602 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) [2021-06-05 17:05:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:42,069 INFO L93 Difference]: Finished difference Result 84008 states and 311824 transitions. [2021-06-05 17:05:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:05:42,069 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 [2021-06-05 17:05:42,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:42,284 INFO L225 Difference]: With dead ends: 84008 [2021-06-05 17:05:42,285 INFO L226 Difference]: Without dead ends: 83993 [2021-06-05 17:05:42,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2207.3ms TimeCoverageRelationStatistics Valid=357, Invalid=2949, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:05:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83993 states. [2021-06-05 17:05:43,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83993 to 50558. [2021-06-05 17:05:43,780 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) [2021-06-05 17:05:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50558 states to 50558 states and 195814 transitions. [2021-06-05 17:05:44,186 INFO L78 Accepts]: Start accepts. Automaton has 50558 states and 195814 transitions. Word has length 30 [2021-06-05 17:05:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:44,186 INFO L482 AbstractCegarLoop]: Abstraction has 50558 states and 195814 transitions. [2021-06-05 17:05:44,186 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) [2021-06-05 17:05:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 50558 states and 195814 transitions. [2021-06-05 17:05:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:44,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:44,272 INFO L521 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] [2021-06-05 17:05:44,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:44,472 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:44,473 INFO L82 PathProgramCache]: Analyzing trace with hash 956036336, now seen corresponding path program 183 times [2021-06-05 17:05:44,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:44,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567967140] [2021-06-05 17:05:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:44,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:44,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567967140] [2021-06-05 17:05:44,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567967140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:44,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798553780] [2021-06-05 17:05:44,649 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 [2021-06-05 17:05:44,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:05:44,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:44,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 17:05:44,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:45,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:45,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:45,123 INFO L354 Elim1Store]: treesize reduction 37, result has 49.3 percent of original size [2021-06-05 17:05:45,124 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 [2021-06-05 17:05:45,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:45,215 INFO L628 ElimStorePlain]: treesize reduction 25, result has 80.8 percent of original size [2021-06-05 17:05:45,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:45,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:75, output treesize:33 [2021-06-05 17:05:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:45,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798553780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:45,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:45,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 17:05:45,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101120631] [2021-06-05 17:05:45,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:05:45,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:05:45,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:05:45,290 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) [2021-06-05 17:05:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:49,113 INFO L93 Difference]: Finished difference Result 83166 states and 309365 transitions. [2021-06-05 17:05:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:05:49,113 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 [2021-06-05 17:05:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:49,326 INFO L225 Difference]: With dead ends: 83166 [2021-06-05 17:05:49,326 INFO L226 Difference]: Without dead ends: 83136 [2021-06-05 17:05:49,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2397.1ms TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:05:49,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83136 states. [2021-06-05 17:05:50,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83136 to 50558. [2021-06-05 17:05:50,761 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) [2021-06-05 17:05:51,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50558 states to 50558 states and 195814 transitions. [2021-06-05 17:05:51,260 INFO L78 Accepts]: Start accepts. Automaton has 50558 states and 195814 transitions. Word has length 30 [2021-06-05 17:05:51,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:51,260 INFO L482 AbstractCegarLoop]: Abstraction has 50558 states and 195814 transitions. [2021-06-05 17:05:51,260 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) [2021-06-05 17:05:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 50558 states and 195814 transitions. [2021-06-05 17:05:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:51,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:51,350 INFO L521 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] [2021-06-05 17:05:51,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:51,551 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:51,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:51,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1261273866, now seen corresponding path program 184 times [2021-06-05 17:05:51,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:51,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059178283] [2021-06-05 17:05:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:51,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:51,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059178283] [2021-06-05 17:05:51,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059178283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:51,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166611927] [2021-06-05 17:05:51,759 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 [2021-06-05 17:05:51,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:51,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:51,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:05:51,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:52,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:52,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:52,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:52,064 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 [2021-06-05 17:05:52,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:52,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:52,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:52,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-05 17:05:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:52,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166611927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:52,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:52,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:05:52,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298562307] [2021-06-05 17:05:52,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:05:52,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:52,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:05:52,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:05:52,086 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) [2021-06-05 17:05:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:54,724 INFO L93 Difference]: Finished difference Result 69018 states and 261530 transitions. [2021-06-05 17:05:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:05:54,724 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 [2021-06-05 17:05:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:54,917 INFO L225 Difference]: With dead ends: 69018 [2021-06-05 17:05:54,917 INFO L226 Difference]: Without dead ends: 68952 [2021-06-05 17:05:54,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1842.5ms TimeCoverageRelationStatistics Valid=521, Invalid=2131, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:05:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68952 states. [2021-06-05 17:05:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68952 to 50665. [2021-06-05 17:05:56,180 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) [2021-06-05 17:05:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50665 states to 50665 states and 196235 transitions. [2021-06-05 17:05:56,335 INFO L78 Accepts]: Start accepts. Automaton has 50665 states and 196235 transitions. Word has length 30 [2021-06-05 17:05:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:56,335 INFO L482 AbstractCegarLoop]: Abstraction has 50665 states and 196235 transitions. [2021-06-05 17:05:56,335 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) [2021-06-05 17:05:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 50665 states and 196235 transitions. [2021-06-05 17:05:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:56,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:56,419 INFO L521 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] [2021-06-05 17:05:56,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 17:05:56,620 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:56,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1005295414, now seen corresponding path program 185 times [2021-06-05 17:05:56,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:56,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384470216] [2021-06-05 17:05:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:56,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:56,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384470216] [2021-06-05 17:05:56,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384470216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:56,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915634158] [2021-06-05 17:05:56,827 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 [2021-06-05 17:05:56,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:05:56,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:56,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:05:56,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:57,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:57,122 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 [2021-06-05 17:05:57,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:57,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:57,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:57,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-05 17:05:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:57,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915634158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:57,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:57,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:05:57,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312674603] [2021-06-05 17:05:57,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:05:57,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:57,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:05:57,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:05:57,147 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) [2021-06-05 17:05:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:59,565 INFO L93 Difference]: Finished difference Result 68874 states and 261214 transitions. [2021-06-05 17:05:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:05:59,565 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 [2021-06-05 17:05:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:59,746 INFO L225 Difference]: With dead ends: 68874 [2021-06-05 17:05:59,746 INFO L226 Difference]: Without dead ends: 68826 [2021-06-05 17:05:59,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1538.4ms TimeCoverageRelationStatistics Valid=498, Invalid=2052, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:05:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68826 states. [2021-06-05 17:06:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68826 to 50649. [2021-06-05 17:06:01,028 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) [2021-06-05 17:06:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50649 states to 50649 states and 196193 transitions. [2021-06-05 17:06:01,178 INFO L78 Accepts]: Start accepts. Automaton has 50649 states and 196193 transitions. Word has length 30 [2021-06-05 17:06:01,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:01,178 INFO L482 AbstractCegarLoop]: Abstraction has 50649 states and 196193 transitions. [2021-06-05 17:06:01,178 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) [2021-06-05 17:06:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 50649 states and 196193 transitions. [2021-06-05 17:06:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:01,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:01,259 INFO L521 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] [2021-06-05 17:06:01,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 17:06:01,459 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:01,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:01,459 INFO L82 PathProgramCache]: Analyzing trace with hash -893195398, now seen corresponding path program 186 times [2021-06-05 17:06:01,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:01,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134875135] [2021-06-05 17:06:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:01,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:01,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134875135] [2021-06-05 17:06:01,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134875135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:01,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653692662] [2021-06-05 17:06:01,659 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 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 [2021-06-05 17:06:01,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:06:01,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:01,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:06:01,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:01,991 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-05 17:06:02,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:02,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:02,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:02,239 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 [2021-06-05 17:06:02,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:02,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:02,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:02,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-05 17:06:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:02,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653692662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:02,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:02,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:06:02,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5870305] [2021-06-05 17:06:02,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:06:02,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:02,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:06:02,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:06:02,264 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) [2021-06-05 17:06:05,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:05,189 INFO L93 Difference]: Finished difference Result 72235 states and 271440 transitions. [2021-06-05 17:06:05,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:06:05,189 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 [2021-06-05 17:06:05,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:05,363 INFO L225 Difference]: With dead ends: 72235 [2021-06-05 17:06:05,363 INFO L226 Difference]: Without dead ends: 72163 [2021-06-05 17:06:05,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1958.1ms TimeCoverageRelationStatistics Valid=695, Invalid=2727, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:06:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72163 states. [2021-06-05 17:06:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72163 to 50684. [2021-06-05 17:06:06,596 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) [2021-06-05 17:06:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50684 states to 50684 states and 196299 transitions. [2021-06-05 17:06:06,748 INFO L78 Accepts]: Start accepts. Automaton has 50684 states and 196299 transitions. Word has length 30 [2021-06-05 17:06:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:06,748 INFO L482 AbstractCegarLoop]: Abstraction has 50684 states and 196299 transitions. [2021-06-05 17:06:06,749 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) [2021-06-05 17:06:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 50684 states and 196299 transitions. [2021-06-05 17:06:06,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:06,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:06,830 INFO L521 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] [2021-06-05 17:06:07,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:07,030 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:07,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:07,031 INFO L82 PathProgramCache]: Analyzing trace with hash -319132678, now seen corresponding path program 187 times [2021-06-05 17:06:07,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:07,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812258378] [2021-06-05 17:06:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:07,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:07,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812258378] [2021-06-05 17:06:07,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812258378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:07,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180579107] [2021-06-05 17:06:07,230 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) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 17:06:07,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:07,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:07,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:07,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:07,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:07,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:07,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:07,575 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 [2021-06-05 17:06:07,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:07,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:07,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:07,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:15 [2021-06-05 17:06:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:07,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180579107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:07,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:07,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 17:06:07,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917725629] [2021-06-05 17:06:07,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:06:07,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:07,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:06:07,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:06:07,630 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) [2021-06-05 17:06:09,133 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 17:06:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:12,894 INFO L93 Difference]: Finished difference Result 91851 states and 339846 transitions. [2021-06-05 17:06:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:06:12,895 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 [2021-06-05 17:06:12,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:13,130 INFO L225 Difference]: With dead ends: 91851 [2021-06-05 17:06:13,130 INFO L226 Difference]: Without dead ends: 91815 [2021-06-05 17:06:13,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 4006.3ms TimeCoverageRelationStatistics Valid=631, Invalid=5221, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 17:06:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91815 states. [2021-06-05 17:06:14,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91815 to 50856. [2021-06-05 17:06:14,606 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) [2021-06-05 17:06:14,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50856 states to 50856 states and 196875 transitions. [2021-06-05 17:06:14,762 INFO L78 Accepts]: Start accepts. Automaton has 50856 states and 196875 transitions. Word has length 30 [2021-06-05 17:06:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:14,762 INFO L482 AbstractCegarLoop]: Abstraction has 50856 states and 196875 transitions. [2021-06-05 17:06:14,762 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) [2021-06-05 17:06:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 50856 states and 196875 transitions. [2021-06-05 17:06:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:14,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:14,845 INFO L521 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] [2021-06-05 17:06:15,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-05 17:06:15,045 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:15,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:15,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1890767390, now seen corresponding path program 188 times [2021-06-05 17:06:15,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:15,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029137452] [2021-06-05 17:06:15,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:15,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:15,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029137452] [2021-06-05 17:06:15,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029137452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:15,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550447933] [2021-06-05 17:06:15,246 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 [2021-06-05 17:06:15,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:15,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:15,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 17:06:15,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:15,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:15,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:15,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:15,666 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 [2021-06-05 17:06:15,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:15,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:15,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:06:15,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:23 [2021-06-05 17:06:16,117 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 17:06:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:16,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550447933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:16,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:16,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-05 17:06:16,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850593707] [2021-06-05 17:06:16,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:06:16,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:16,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:06:16,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:06:16,136 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) [2021-06-05 17:06:19,766 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 17:06:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:21,230 INFO L93 Difference]: Finished difference Result 71154 states and 268043 transitions. [2021-06-05 17:06:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:06:21,231 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 [2021-06-05 17:06:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:21,417 INFO L225 Difference]: With dead ends: 71154 [2021-06-05 17:06:21,417 INFO L226 Difference]: Without dead ends: 71103 [2021-06-05 17:06:21,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 4037.7ms TimeCoverageRelationStatistics Valid=839, Invalid=4563, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 17:06:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71103 states. [2021-06-05 17:06:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71103 to 50856. [2021-06-05 17:06:22,641 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) [2021-06-05 17:06:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50856 states to 50856 states and 196875 transitions. [2021-06-05 17:06:22,794 INFO L78 Accepts]: Start accepts. Automaton has 50856 states and 196875 transitions. Word has length 30 [2021-06-05 17:06:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:22,794 INFO L482 AbstractCegarLoop]: Abstraction has 50856 states and 196875 transitions. [2021-06-05 17:06:22,794 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) [2021-06-05 17:06:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 50856 states and 196875 transitions. [2021-06-05 17:06:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:22,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:22,877 INFO L521 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] [2021-06-05 17:06:23,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:23,077 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:23,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:23,078 INFO L82 PathProgramCache]: Analyzing trace with hash -137630626, now seen corresponding path program 189 times [2021-06-05 17:06:23,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:23,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255575239] [2021-06-05 17:06:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:23,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:23,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255575239] [2021-06-05 17:06:23,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255575239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:23,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958213038] [2021-06-05 17:06:23,274 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 [2021-06-05 17:06:23,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:06:23,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:23,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:06:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:23,651 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-06-05 17:06:23,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:23,781 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 [2021-06-05 17:06:23,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:23,823 INFO L628 ElimStorePlain]: treesize reduction 53, result has 45.9 percent of original size [2021-06-05 17:06:23,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:06:23,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:103 [2021-06-05 17:06:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:23,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958213038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:23,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:23,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 17:06:23,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623293399] [2021-06-05 17:06:23,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:06:23,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:23,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:06:23,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:06:23,915 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) [2021-06-05 17:06:27,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:27,950 INFO L93 Difference]: Finished difference Result 71044 states and 267781 transitions. [2021-06-05 17:06:27,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 17:06:27,950 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 [2021-06-05 17:06:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:28,142 INFO L225 Difference]: With dead ends: 71044 [2021-06-05 17:06:28,142 INFO L226 Difference]: Without dead ends: 70990 [2021-06-05 17:06:28,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 3188.5ms TimeCoverageRelationStatistics Valid=670, Invalid=3886, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:06:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70990 states. [2021-06-05 17:06:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70990 to 50820. [2021-06-05 17:06:29,393 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) [2021-06-05 17:06:29,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50820 states to 50820 states and 196762 transitions. [2021-06-05 17:06:29,550 INFO L78 Accepts]: Start accepts. Automaton has 50820 states and 196762 transitions. Word has length 30 [2021-06-05 17:06:29,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:29,550 INFO L482 AbstractCegarLoop]: Abstraction has 50820 states and 196762 transitions. [2021-06-05 17:06:29,551 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) [2021-06-05 17:06:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 50820 states and 196762 transitions. [2021-06-05 17:06:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:29,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:29,632 INFO L521 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] [2021-06-05 17:06:29,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:29,833 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:29,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:29,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2075040334, now seen corresponding path program 190 times [2021-06-05 17:06:29,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:29,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34984686] [2021-06-05 17:06:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:29,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:29,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34984686] [2021-06-05 17:06:29,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34984686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:29,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322615055] [2021-06-05 17:06:29,990 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 [2021-06-05 17:06:30,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:30,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:30,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:06:30,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:30,324 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 17:06:30,324 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 [2021-06-05 17:06:30,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:30,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:30,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:30,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 17:06:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:30,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322615055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:30,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:30,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:06:30,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047496075] [2021-06-05 17:06:30,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:06:30,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:30,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:06:30,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:06:30,348 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) [2021-06-05 17:06:30,922 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 17:06:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:33,679 INFO L93 Difference]: Finished difference Result 76562 states and 289629 transitions. [2021-06-05 17:06:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:06:33,679 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 [2021-06-05 17:06:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:34,126 INFO L225 Difference]: With dead ends: 76562 [2021-06-05 17:06:34,126 INFO L226 Difference]: Without dead ends: 76526 [2021-06-05 17:06:34,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 2415.3ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:06:34,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76526 states. [2021-06-05 17:06:35,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76526 to 50849. [2021-06-05 17:06:35,407 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) [2021-06-05 17:06:35,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50849 states to 50849 states and 196890 transitions. [2021-06-05 17:06:35,566 INFO L78 Accepts]: Start accepts. Automaton has 50849 states and 196890 transitions. Word has length 30 [2021-06-05 17:06:35,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:35,566 INFO L482 AbstractCegarLoop]: Abstraction has 50849 states and 196890 transitions. [2021-06-05 17:06:35,566 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) [2021-06-05 17:06:35,566 INFO L276 IsEmpty]: Start isEmpty. Operand 50849 states and 196890 transitions. [2021-06-05 17:06:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:35,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:35,651 INFO L521 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] [2021-06-05 17:06:35,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:35,852 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:35,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2052117870, now seen corresponding path program 191 times [2021-06-05 17:06:35,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:35,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429187029] [2021-06-05 17:06:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:36,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:36,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429187029] [2021-06-05 17:06:36,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429187029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:36,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372485968] [2021-06-05 17:06:36,012 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 [2021-06-05 17:06:36,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:06:36,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:36,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:06:36,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:36,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:36,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:36,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:36,255 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 [2021-06-05 17:06:36,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:36,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:36,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:36,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-05 17:06:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:36,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372485968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:36,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:36,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 17:06:36,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820621802] [2021-06-05 17:06:36,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:06:36,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:36,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:06:36,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:06:36,281 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) [2021-06-05 17:06:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:37,859 INFO L93 Difference]: Finished difference Result 60558 states and 229990 transitions. [2021-06-05 17:06:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:06:37,860 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 [2021-06-05 17:06:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:38,059 INFO L225 Difference]: With dead ends: 60558 [2021-06-05 17:06:38,059 INFO L226 Difference]: Without dead ends: 60543 [2021-06-05 17:06:38,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 851.8ms TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:06:38,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60543 states. [2021-06-05 17:06:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60543 to 50841. [2021-06-05 17:06:39,370 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) [2021-06-05 17:06:39,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50841 states to 50841 states and 196862 transitions. [2021-06-05 17:06:39,527 INFO L78 Accepts]: Start accepts. Automaton has 50841 states and 196862 transitions. Word has length 30 [2021-06-05 17:06:39,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:39,527 INFO L482 AbstractCegarLoop]: Abstraction has 50841 states and 196862 transitions. [2021-06-05 17:06:39,527 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) [2021-06-05 17:06:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 50841 states and 196862 transitions. [2021-06-05 17:06:39,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:39,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:39,612 INFO L521 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] [2021-06-05 17:06:39,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:39,812 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:39,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:39,812 INFO L82 PathProgramCache]: Analyzing trace with hash -15398158, now seen corresponding path program 192 times [2021-06-05 17:06:39,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:39,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089506835] [2021-06-05 17:06:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:40,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:40,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089506835] [2021-06-05 17:06:40,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089506835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:40,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507296154] [2021-06-05 17:06:40,004 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 [2021-06-05 17:06:40,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:06:40,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:40,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 17:06:40,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:40,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:40,410 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 [2021-06-05 17:06:40,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:40,563 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-06-05 17:06:40,563 INFO L628 ElimStorePlain]: treesize reduction 217, result has 29.5 percent of original size [2021-06-05 17:06:40,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:40,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:200 [2021-06-05 17:06:40,724 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-06-05 17:06:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:40,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507296154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:40,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:40,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-06-05 17:06:40,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909090879] [2021-06-05 17:06:40,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 17:06:40,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:40,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 17:06:40,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:06:40,858 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) [2021-06-05 17:06:43,883 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-06-05 17:06:44,378 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-05 17:06:45,414 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-05 17:06:47,241 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 17:06:47,578 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 17:06:47,714 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 17:06:47,907 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 17:06:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:48,367 INFO L93 Difference]: Finished difference Result 81005 states and 305937 transitions. [2021-06-05 17:06:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 17:06:48,368 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 [2021-06-05 17:06:48,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:48,736 INFO L225 Difference]: With dead ends: 81005 [2021-06-05 17:06:48,736 INFO L226 Difference]: Without dead ends: 80960 [2021-06-05 17:06:48,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3094 ImplicationChecksByTransitivity, 6044.3ms TimeCoverageRelationStatistics Valid=1313, Invalid=7807, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 17:06:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80960 states. [2021-06-05 17:06:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80960 to 50848. [2021-06-05 17:06:50,048 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) [2021-06-05 17:06:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50848 states to 50848 states and 196889 transitions. [2021-06-05 17:06:50,209 INFO L78 Accepts]: Start accepts. Automaton has 50848 states and 196889 transitions. Word has length 30 [2021-06-05 17:06:50,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:50,209 INFO L482 AbstractCegarLoop]: Abstraction has 50848 states and 196889 transitions. [2021-06-05 17:06:50,209 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) [2021-06-05 17:06:50,209 INFO L276 IsEmpty]: Start isEmpty. Operand 50848 states and 196889 transitions. [2021-06-05 17:06:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:50,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:50,292 INFO L521 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] [2021-06-05 17:06:50,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-05 17:06:50,492 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:50,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:50,493 INFO L82 PathProgramCache]: Analyzing trace with hash -512119518, now seen corresponding path program 193 times [2021-06-05 17:06:50,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:50,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333828772] [2021-06-05 17:06:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:50,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:50,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333828772] [2021-06-05 17:06:50,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333828772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:50,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850179900] [2021-06-05 17:06:50,687 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 [2021-06-05 17:06:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:50,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:06:50,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:51,030 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 17:06:51,031 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 [2021-06-05 17:06:51,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:51,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:51,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:51,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 17:06:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:51,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850179900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:51,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:51,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:06:51,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062405877] [2021-06-05 17:06:51,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:06:51,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:51,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:06:51,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:06:51,056 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) [2021-06-05 17:06:52,695 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 17:06:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:54,001 INFO L93 Difference]: Finished difference Result 77700 states and 291511 transitions. [2021-06-05 17:06:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:06:54,001 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 [2021-06-05 17:06:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:54,212 INFO L225 Difference]: With dead ends: 77700 [2021-06-05 17:06:54,212 INFO L226 Difference]: Without dead ends: 77655 [2021-06-05 17:06:54,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 2171.1ms TimeCoverageRelationStatistics Valid=677, Invalid=2745, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:06:54,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77655 states. [2021-06-05 17:06:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77655 to 50905. [2021-06-05 17:06:55,687 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) [2021-06-05 17:06:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50905 states to 50905 states and 197153 transitions. [2021-06-05 17:06:55,842 INFO L78 Accepts]: Start accepts. Automaton has 50905 states and 197153 transitions. Word has length 30 [2021-06-05 17:06:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:55,842 INFO L482 AbstractCegarLoop]: Abstraction has 50905 states and 197153 transitions. [2021-06-05 17:06:55,842 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) [2021-06-05 17:06:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 50905 states and 197153 transitions. [2021-06-05 17:06:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:56,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:56,229 INFO L521 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] [2021-06-05 17:06:56,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:56,452 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:56,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2129652298, now seen corresponding path program 194 times [2021-06-05 17:06:56,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:56,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377263628] [2021-06-05 17:06:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:56,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:56,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377263628] [2021-06-05 17:06:56,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377263628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:56,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997314298] [2021-06-05 17:06:56,653 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 [2021-06-05 17:06:56,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:56,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:56,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:06:56,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:56,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:56,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:56,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:56,923 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 [2021-06-05 17:06:56,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:56,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:56,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:06:56,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:23 [2021-06-05 17:06:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:56,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997314298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:56,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:56,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:06:56,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666564038] [2021-06-05 17:06:56,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:06:56,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:56,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:06:56,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:06:56,984 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) [2021-06-05 17:06:59,661 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-06-05 17:07:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:00,976 INFO L93 Difference]: Finished difference Result 83144 states and 313968 transitions. [2021-06-05 17:07:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 17:07:00,976 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 [2021-06-05 17:07:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:01,200 INFO L225 Difference]: With dead ends: 83144 [2021-06-05 17:07:01,201 INFO L226 Difference]: Without dead ends: 83114 [2021-06-05 17:07:01,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 2995.4ms TimeCoverageRelationStatistics Valid=1067, Invalid=4633, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 17:07:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83114 states. [2021-06-05 17:07:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83114 to 50927. [2021-06-05 17:07:02,587 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) [2021-06-05 17:07:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50927 states to 50927 states and 197259 transitions. [2021-06-05 17:07:02,740 INFO L78 Accepts]: Start accepts. Automaton has 50927 states and 197259 transitions. Word has length 30 [2021-06-05 17:07:02,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:02,741 INFO L482 AbstractCegarLoop]: Abstraction has 50927 states and 197259 transitions. [2021-06-05 17:07:02,741 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) [2021-06-05 17:07:02,741 INFO L276 IsEmpty]: Start isEmpty. Operand 50927 states and 197259 transitions. [2021-06-05 17:07:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:03,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:03,076 INFO L521 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] [2021-06-05 17:07:03,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 17:07:03,299 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:03,300 INFO L82 PathProgramCache]: Analyzing trace with hash 382550838, now seen corresponding path program 195 times [2021-06-05 17:07:03,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:03,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866128549] [2021-06-05 17:07:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:03,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:03,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866128549] [2021-06-05 17:07:03,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866128549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:03,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78855636] [2021-06-05 17:07:03,525 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 [2021-06-05 17:07:03,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:07:03,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:03,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:07:03,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:03,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:03,822 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 [2021-06-05 17:07:03,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:03,864 INFO L628 ElimStorePlain]: treesize reduction 51, result has 46.9 percent of original size [2021-06-05 17:07:03,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 17:07:03,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:83 [2021-06-05 17:07:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:03,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78855636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:03,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:03,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 17:07:03,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837501935] [2021-06-05 17:07:03,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:07:03,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:03,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:07:03,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:07:03,966 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) [2021-06-05 17:07:04,473 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-05 17:07:06,549 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 17:07:06,741 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 17:07:07,250 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 17:07:07,738 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-05 17:07:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:08,569 INFO L93 Difference]: Finished difference Result 74529 states and 282265 transitions. [2021-06-05 17:07:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:07:08,570 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 [2021-06-05 17:07:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:08,769 INFO L225 Difference]: With dead ends: 74529 [2021-06-05 17:07:08,770 INFO L226 Difference]: Without dead ends: 74499 [2021-06-05 17:07:08,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 3486.3ms TimeCoverageRelationStatistics Valid=826, Invalid=4144, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:07:08,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74499 states. [2021-06-05 17:07:09,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74499 to 50939. [2021-06-05 17:07:10,049 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) [2021-06-05 17:07:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50939 states to 50939 states and 197312 transitions. [2021-06-05 17:07:10,213 INFO L78 Accepts]: Start accepts. Automaton has 50939 states and 197312 transitions. Word has length 30 [2021-06-05 17:07:10,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:10,213 INFO L482 AbstractCegarLoop]: Abstraction has 50939 states and 197312 transitions. [2021-06-05 17:07:10,213 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) [2021-06-05 17:07:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 50939 states and 197312 transitions. [2021-06-05 17:07:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:10,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:10,525 INFO L521 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] [2021-06-05 17:07:10,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-06-05 17:07:10,748 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:10,748 INFO L82 PathProgramCache]: Analyzing trace with hash 956613558, now seen corresponding path program 196 times [2021-06-05 17:07:10,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:10,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11269586] [2021-06-05 17:07:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:10,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:10,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11269586] [2021-06-05 17:07:10,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11269586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:10,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532330848] [2021-06-05 17:07:10,927 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 [2021-06-05 17:07:10,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:10,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 17:07:10,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:11,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:11,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:11,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:11,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:11,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:11,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:11,280 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 [2021-06-05 17:07:11,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:11,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:11,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:11,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:22 [2021-06-05 17:07:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:11,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532330848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:11,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:11,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 17:07:11,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351517576] [2021-06-05 17:07:11,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:07:11,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:11,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:07:11,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:07:11,335 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) [2021-06-05 17:07:13,912 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 17:07:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:18,025 INFO L93 Difference]: Finished difference Result 97250 states and 359275 transitions. [2021-06-05 17:07:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 17:07:18,026 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 [2021-06-05 17:07:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:18,281 INFO L225 Difference]: With dead ends: 97250 [2021-06-05 17:07:18,282 INFO L226 Difference]: Without dead ends: 97199 [2021-06-05 17:07:18,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 4831.5ms TimeCoverageRelationStatistics Valid=1104, Invalid=7452, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 17:07:18,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97199 states. [2021-06-05 17:07:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97199 to 51032. [2021-06-05 17:07:19,861 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) [2021-06-05 17:07:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51032 states to 51032 states and 197709 transitions. [2021-06-05 17:07:20,026 INFO L78 Accepts]: Start accepts. Automaton has 51032 states and 197709 transitions. Word has length 30 [2021-06-05 17:07:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:20,027 INFO L482 AbstractCegarLoop]: Abstraction has 51032 states and 197709 transitions. [2021-06-05 17:07:20,027 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) [2021-06-05 17:07:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 51032 states and 197709 transitions. [2021-06-05 17:07:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:20,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:20,119 INFO L521 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] [2021-06-05 17:07:20,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:20,320 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:20,320 INFO L82 PathProgramCache]: Analyzing trace with hash 354888434, now seen corresponding path program 197 times [2021-06-05 17:07:20,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:20,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297234693] [2021-06-05 17:07:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:20,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:20,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297234693] [2021-06-05 17:07:20,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297234693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:20,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750206013] [2021-06-05 17:07:20,481 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 [2021-06-05 17:07:20,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:07:20,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:20,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:07:20,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:21,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:21,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:21,064 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 [2021-06-05 17:07:21,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:07:21,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:21,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:07:21,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:23 [2021-06-05 17:07:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:21,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750206013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:21,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:21,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:07:21,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382399960] [2021-06-05 17:07:21,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:07:21,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:21,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:07:21,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:07:21,148 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) [2021-06-05 17:07:24,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:24,716 INFO L93 Difference]: Finished difference Result 84956 states and 320071 transitions. [2021-06-05 17:07:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 17:07:24,716 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 [2021-06-05 17:07:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:24,950 INFO L225 Difference]: With dead ends: 84956 [2021-06-05 17:07:24,950 INFO L226 Difference]: Without dead ends: 84926 [2021-06-05 17:07:24,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 2463.4ms TimeCoverageRelationStatistics Valid=1060, Invalid=4052, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 17:07:25,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84926 states. [2021-06-05 17:07:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84926 to 51051. [2021-06-05 17:07:26,355 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) [2021-06-05 17:07:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51051 states to 51051 states and 197810 transitions. [2021-06-05 17:07:26,510 INFO L78 Accepts]: Start accepts. Automaton has 51051 states and 197810 transitions. Word has length 30 [2021-06-05 17:07:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:26,511 INFO L482 AbstractCegarLoop]: Abstraction has 51051 states and 197810 transitions. [2021-06-05 17:07:26,511 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) [2021-06-05 17:07:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 51051 states and 197810 transitions. [2021-06-05 17:07:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:26,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:26,593 INFO L521 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] [2021-06-05 17:07:26,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:26,793 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash 375624962, now seen corresponding path program 198 times [2021-06-05 17:07:26,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:26,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942760456] [2021-06-05 17:07:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:27,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:27,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942760456] [2021-06-05 17:07:27,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942760456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:27,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987411721] [2021-06-05 17:07:27,026 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 [2021-06-05 17:07:27,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:07:27,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:27,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:07:27,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:27,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:27,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:27,363 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 [2021-06-05 17:07:27,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:27,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:27,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:27,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 17:07:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:27,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987411721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:27,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:27,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 17:07:27,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824112079] [2021-06-05 17:07:27,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:07:27,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:27,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:07:27,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:07:27,386 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) [2021-06-05 17:07:27,685 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-06-05 17:07:29,730 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 17:07:30,315 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 17:07:30,645 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 17:07:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:31,516 INFO L93 Difference]: Finished difference Result 78799 states and 296374 transitions. [2021-06-05 17:07:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:07:31,516 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 [2021-06-05 17:07:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:31,726 INFO L225 Difference]: With dead ends: 78799 [2021-06-05 17:07:31,726 INFO L226 Difference]: Without dead ends: 78784 [2021-06-05 17:07:31,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 3109.5ms TimeCoverageRelationStatistics Valid=747, Invalid=3543, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:07:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78784 states. [2021-06-05 17:07:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78784 to 51046. [2021-06-05 17:07:33,051 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) [2021-06-05 17:07:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51046 states to 51046 states and 197788 transitions. [2021-06-05 17:07:33,205 INFO L78 Accepts]: Start accepts. Automaton has 51046 states and 197788 transitions. Word has length 30 [2021-06-05 17:07:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:33,205 INFO L482 AbstractCegarLoop]: Abstraction has 51046 states and 197788 transitions. [2021-06-05 17:07:33,206 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) [2021-06-05 17:07:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 51046 states and 197788 transitions. [2021-06-05 17:07:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:33,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:33,288 INFO L521 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] [2021-06-05 17:07:33,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 17:07:33,489 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:33,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:33,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2136041370, now seen corresponding path program 199 times [2021-06-05 17:07:33,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:33,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078263484] [2021-06-05 17:07:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:33,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:33,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078263484] [2021-06-05 17:07:33,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078263484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:33,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958991848] [2021-06-05 17:07:33,674 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 [2021-06-05 17:07:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:33,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 17:07:33,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:34,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:34,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:34,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:34,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:34,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:34,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:34,023 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 [2021-06-05 17:07:34,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:34,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:34,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:34,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:22 [2021-06-05 17:07:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:34,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958991848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:34,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:34,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 17:07:34,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101774810] [2021-06-05 17:07:34,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:07:34,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:34,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:07:34,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:07:34,077 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) [2021-06-05 17:07:38,523 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 17:07:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:40,494 INFO L93 Difference]: Finished difference Result 96322 states and 356717 transitions. [2021-06-05 17:07:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 17:07:40,494 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 [2021-06-05 17:07:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:40,747 INFO L225 Difference]: With dead ends: 96322 [2021-06-05 17:07:40,747 INFO L226 Difference]: Without dead ends: 96271 [2021-06-05 17:07:40,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 4649.6ms TimeCoverageRelationStatistics Valid=1004, Invalid=6478, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 17:07:40,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96271 states. [2021-06-05 17:07:42,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96271 to 51050. [2021-06-05 17:07:42,442 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) [2021-06-05 17:07:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51050 states to 51050 states and 197806 transitions. [2021-06-05 17:07:42,597 INFO L78 Accepts]: Start accepts. Automaton has 51050 states and 197806 transitions. Word has length 30 [2021-06-05 17:07:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:42,597 INFO L482 AbstractCegarLoop]: Abstraction has 51050 states and 197806 transitions. [2021-06-05 17:07:42,597 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) [2021-06-05 17:07:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 51050 states and 197806 transitions. [2021-06-05 17:07:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:42,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:42,679 INFO L521 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] [2021-06-05 17:07:42,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 17:07:42,879 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:42,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:42,880 INFO L82 PathProgramCache]: Analyzing trace with hash -302392718, now seen corresponding path program 200 times [2021-06-05 17:07:42,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:42,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311578046] [2021-06-05 17:07:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:43,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:43,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311578046] [2021-06-05 17:07:43,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311578046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:43,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363620421] [2021-06-05 17:07:43,056 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 [2021-06-05 17:07:43,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:43,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:43,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:07:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:43,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:43,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:43,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:43,294 INFO L354 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2021-06-05 17:07:43,294 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 [2021-06-05 17:07:43,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:43,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:43,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:43,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:87, output treesize:22 [2021-06-05 17:07:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:43,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363620421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:43,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:43,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:07:43,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46077744] [2021-06-05 17:07:43,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:07:43,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:43,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:07:43,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:07:43,363 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) [2021-06-05 17:07:47,158 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 17:07:47,662 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 17:07:48,435 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-05 17:07:49,155 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-05 17:07:50,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:50,351 INFO L93 Difference]: Finished difference Result 98122 states and 365133 transitions. [2021-06-05 17:07:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 17:07:50,352 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 [2021-06-05 17:07:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:50,634 INFO L225 Difference]: With dead ends: 98122 [2021-06-05 17:07:50,634 INFO L226 Difference]: Without dead ends: 98092 [2021-06-05 17:07:50,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2561 ImplicationChecksByTransitivity, 4781.5ms TimeCoverageRelationStatistics Valid=993, Invalid=6839, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 17:07:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98092 states. [2021-06-05 17:07:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98092 to 51052. [2021-06-05 17:07:52,455 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) [2021-06-05 17:07:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51052 states to 51052 states and 197815 transitions. [2021-06-05 17:07:52,618 INFO L78 Accepts]: Start accepts. Automaton has 51052 states and 197815 transitions. Word has length 30 [2021-06-05 17:07:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:52,618 INFO L482 AbstractCegarLoop]: Abstraction has 51052 states and 197815 transitions. [2021-06-05 17:07:52,618 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) [2021-06-05 17:07:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 51052 states and 197815 transitions. [2021-06-05 17:07:52,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:52,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:52,701 INFO L521 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] [2021-06-05 17:07:52,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:52,902 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:52,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:52,902 INFO L82 PathProgramCache]: Analyzing trace with hash -225306266, now seen corresponding path program 201 times [2021-06-05 17:07:52,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:52,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606383710] [2021-06-05 17:07:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:53,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:53,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606383710] [2021-06-05 17:07:53,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606383710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:53,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689491654] [2021-06-05 17:07:53,111 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 [2021-06-05 17:07:53,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:07:53,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:53,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:07:53,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:53,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:53,441 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 [2021-06-05 17:07:53,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:53,499 INFO L628 ElimStorePlain]: treesize reduction 68, result has 39.8 percent of original size [2021-06-05 17:07:53,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:07:53,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:82 [2021-06-05 17:07:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:53,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689491654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:53,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:53,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 17:07:53,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376974384] [2021-06-05 17:07:53,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:07:53,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:53,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:07:53,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:07:53,634 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) [2021-06-05 17:07:56,719 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 17:07:56,913 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-05 17:07:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:58,208 INFO L93 Difference]: Finished difference Result 63398 states and 235417 transitions. [2021-06-05 17:07:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:07:58,208 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 [2021-06-05 17:07:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:58,378 INFO L225 Difference]: With dead ends: 63398 [2021-06-05 17:07:58,378 INFO L226 Difference]: Without dead ends: 63290 [2021-06-05 17:07:58,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3598.4ms TimeCoverageRelationStatistics Valid=699, Invalid=3333, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:07:58,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63290 states. [2021-06-05 17:07:59,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63290 to 51149. [2021-06-05 17:07:59,555 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) [2021-06-05 17:07:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51149 states to 51149 states and 198233 transitions. [2021-06-05 17:07:59,957 INFO L78 Accepts]: Start accepts. Automaton has 51149 states and 198233 transitions. Word has length 30 [2021-06-05 17:07:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:59,958 INFO L482 AbstractCegarLoop]: Abstraction has 51149 states and 198233 transitions. [2021-06-05 17:07:59,958 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) [2021-06-05 17:07:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 51149 states and 198233 transitions. [2021-06-05 17:08:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:00,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:00,046 INFO L521 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] [2021-06-05 17:08:00,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 17:08:00,246 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:00,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:00,247 INFO L82 PathProgramCache]: Analyzing trace with hash 348756454, now seen corresponding path program 202 times [2021-06-05 17:08:00,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:00,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354600039] [2021-06-05 17:08:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:00,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:00,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354600039] [2021-06-05 17:08:00,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354600039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:00,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156253267] [2021-06-05 17:08:00,408 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 [2021-06-05 17:08:00,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:08:00,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:00,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:08:00,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:00,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:00,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:00,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:00,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:00,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:00,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:00,695 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 [2021-06-05 17:08:00,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:08:00,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:00,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:00,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:08:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:00,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156253267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:00,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:00,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:08:00,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284647626] [2021-06-05 17:08:00,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:08:00,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:00,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:08:00,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:08:00,723 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) [2021-06-05 17:08:01,341 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 17:08:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:05,487 INFO L93 Difference]: Finished difference Result 90253 states and 334745 transitions. [2021-06-05 17:08:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:08:05,487 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 [2021-06-05 17:08:05,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:05,963 INFO L225 Difference]: With dead ends: 90253 [2021-06-05 17:08:05,963 INFO L226 Difference]: Without dead ends: 90208 [2021-06-05 17:08:05,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 3205.7ms TimeCoverageRelationStatistics Valid=745, Invalid=5417, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 17:08:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90208 states. [2021-06-05 17:08:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90208 to 51198. [2021-06-05 17:08:07,407 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) [2021-06-05 17:08:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51198 states to 51198 states and 198433 transitions. [2021-06-05 17:08:07,578 INFO L78 Accepts]: Start accepts. Automaton has 51198 states and 198433 transitions. Word has length 30 [2021-06-05 17:08:07,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:07,578 INFO L482 AbstractCegarLoop]: Abstraction has 51198 states and 198433 transitions. [2021-06-05 17:08:07,578 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) [2021-06-05 17:08:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 51198 states and 198433 transitions. [2021-06-05 17:08:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:07,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:07,668 INFO L521 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] [2021-06-05 17:08:07,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:07,868 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:07,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:07,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1442848042, now seen corresponding path program 203 times [2021-06-05 17:08:07,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:07,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705236494] [2021-06-05 17:08:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:08,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:08,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705236494] [2021-06-05 17:08:08,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705236494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:08,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518960192] [2021-06-05 17:08:08,033 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 [2021-06-05 17:08:08,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:08:08,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:08,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:08:08,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:08,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:08,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:08,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:08,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:08,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:08,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:08,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:08,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:08,281 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 [2021-06-05 17:08:08,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:08:08,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:08,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:08,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:22 [2021-06-05 17:08:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:08,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518960192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:08,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:08,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:08:08,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945981305] [2021-06-05 17:08:08,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:08:08,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:08,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:08:08,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:08:08,338 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) [2021-06-05 17:08:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:14,644 INFO L93 Difference]: Finished difference Result 89164 states and 331673 transitions. [2021-06-05 17:08:14,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:08:14,644 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 [2021-06-05 17:08:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:14,888 INFO L225 Difference]: With dead ends: 89164 [2021-06-05 17:08:14,888 INFO L226 Difference]: Without dead ends: 89134 [2021-06-05 17:08:14,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 3782.1ms TimeCoverageRelationStatistics Valid=760, Invalid=7796, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 17:08:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89134 states. [2021-06-05 17:08:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89134 to 51198. [2021-06-05 17:08:16,326 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) [2021-06-05 17:08:16,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51198 states to 51198 states and 198427 transitions. [2021-06-05 17:08:16,486 INFO L78 Accepts]: Start accepts. Automaton has 51198 states and 198427 transitions. Word has length 30 [2021-06-05 17:08:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:16,486 INFO L482 AbstractCegarLoop]: Abstraction has 51198 states and 198427 transitions. [2021-06-05 17:08:16,486 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) [2021-06-05 17:08:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 51198 states and 198427 transitions. [2021-06-05 17:08:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:16,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:16,571 INFO L521 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] [2021-06-05 17:08:16,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:16,772 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:16,772 INFO L82 PathProgramCache]: Analyzing trace with hash -703322718, now seen corresponding path program 204 times [2021-06-05 17:08:16,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:16,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921409478] [2021-06-05 17:08:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:17,090 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-05 17:08:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:17,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:17,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921409478] [2021-06-05 17:08:17,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921409478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:17,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062022418] [2021-06-05 17:08:17,248 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 [2021-06-05 17:08:17,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:08:17,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:17,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:08:17,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:17,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:17,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:17,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:17,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:17,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:17,536 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 [2021-06-05 17:08:17,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:08:17,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:17,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:17,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:08:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:17,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062022418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:17,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:17,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:08:17,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646212169] [2021-06-05 17:08:17,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:08:17,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:17,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:08:17,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:08:17,563 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) [2021-06-05 17:08:20,443 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 17:08:22,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:22,565 INFO L93 Difference]: Finished difference Result 100466 states and 369497 transitions. [2021-06-05 17:08:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 17:08:22,565 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 [2021-06-05 17:08:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:22,844 INFO L225 Difference]: With dead ends: 100466 [2021-06-05 17:08:22,844 INFO L226 Difference]: Without dead ends: 100421 [2021-06-05 17:08:22,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 4084.5ms TimeCoverageRelationStatistics Valid=949, Invalid=6191, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:08:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100421 states. [2021-06-05 17:08:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100421 to 51219. [2021-06-05 17:08:24,634 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) [2021-06-05 17:08:24,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51219 states to 51219 states and 198507 transitions. [2021-06-05 17:08:24,798 INFO L78 Accepts]: Start accepts. Automaton has 51219 states and 198507 transitions. Word has length 30 [2021-06-05 17:08:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:24,798 INFO L482 AbstractCegarLoop]: Abstraction has 51219 states and 198507 transitions. [2021-06-05 17:08:24,798 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) [2021-06-05 17:08:24,799 INFO L276 IsEmpty]: Start isEmpty. Operand 51219 states and 198507 transitions. [2021-06-05 17:08:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:24,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:24,885 INFO L521 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] [2021-06-05 17:08:25,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:25,086 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:25,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:25,086 INFO L82 PathProgramCache]: Analyzing trace with hash 103853306, now seen corresponding path program 205 times [2021-06-05 17:08:25,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:25,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331210896] [2021-06-05 17:08:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:25,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:25,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331210896] [2021-06-05 17:08:25,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331210896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:25,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512971169] [2021-06-05 17:08:25,324 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 [2021-06-05 17:08:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:25,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:08:25,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:25,621 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 17:08:25,621 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 [2021-06-05 17:08:25,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:08:25,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:25,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:25,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 17:08:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:25,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512971169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:25,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:25,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:08:25,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135856957] [2021-06-05 17:08:25,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:08:25,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:25,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:08:25,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:08:25,645 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) [2021-06-05 17:08:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:28,714 INFO L93 Difference]: Finished difference Result 72664 states and 274266 transitions. [2021-06-05 17:08:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:08:28,714 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 [2021-06-05 17:08:28,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:28,958 INFO L225 Difference]: With dead ends: 72664 [2021-06-05 17:08:28,958 INFO L226 Difference]: Without dead ends: 72586 [2021-06-05 17:08:28,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1718.1ms TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:08:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72586 states. [2021-06-05 17:08:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72586 to 51288. [2021-06-05 17:08:30,374 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) [2021-06-05 17:08:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51288 states to 51288 states and 198778 transitions. [2021-06-05 17:08:30,529 INFO L78 Accepts]: Start accepts. Automaton has 51288 states and 198778 transitions. Word has length 30 [2021-06-05 17:08:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:30,529 INFO L482 AbstractCegarLoop]: Abstraction has 51288 states and 198778 transitions. [2021-06-05 17:08:30,529 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) [2021-06-05 17:08:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 51288 states and 198778 transitions. [2021-06-05 17:08:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:30,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:30,611 INFO L521 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] [2021-06-05 17:08:30,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-05 17:08:30,811 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:30,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:30,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1693723682, now seen corresponding path program 206 times [2021-06-05 17:08:30,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:30,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806241437] [2021-06-05 17:08:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:31,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:31,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806241437] [2021-06-05 17:08:31,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806241437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:31,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380211616] [2021-06-05 17:08:31,019 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 [2021-06-05 17:08:31,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:31,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:31,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:08:31,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:31,501 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-05 17:08:31,530 INFO L354 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2021-06-05 17:08:31,531 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 [2021-06-05 17:08:31,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:08:31,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:31,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:31,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:17 [2021-06-05 17:08:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:31,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380211616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:31,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:31,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:08:31,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425930760] [2021-06-05 17:08:31,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:08:31,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:31,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:08:31,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:08:31,594 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) [2021-06-05 17:08:35,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:35,349 INFO L93 Difference]: Finished difference Result 74850 states and 281175 transitions. [2021-06-05 17:08:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:08:35,350 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 [2021-06-05 17:08:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:35,555 INFO L225 Difference]: With dead ends: 74850 [2021-06-05 17:08:35,555 INFO L226 Difference]: Without dead ends: 74784 [2021-06-05 17:08:35,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 2443.8ms TimeCoverageRelationStatistics Valid=630, Invalid=2792, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:08:35,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74784 states. [2021-06-05 17:08:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74784 to 51286. [2021-06-05 17:08:36,873 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) [2021-06-05 17:08:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51286 states to 51286 states and 198763 transitions. [2021-06-05 17:08:37,034 INFO L78 Accepts]: Start accepts. Automaton has 51286 states and 198763 transitions. Word has length 30 [2021-06-05 17:08:37,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:37,034 INFO L482 AbstractCegarLoop]: Abstraction has 51286 states and 198763 transitions. [2021-06-05 17:08:37,034 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) [2021-06-05 17:08:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 51286 states and 198763 transitions. [2021-06-05 17:08:37,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:37,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:37,122 INFO L521 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] [2021-06-05 17:08:37,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 17:08:37,323 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:37,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2086344974, now seen corresponding path program 207 times [2021-06-05 17:08:37,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:37,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484010585] [2021-06-05 17:08:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:37,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:37,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484010585] [2021-06-05 17:08:37,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484010585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:37,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848159135] [2021-06-05 17:08:37,515 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 [2021-06-05 17:08:37,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:08:37,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:37,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 17:08:37,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:37,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:37,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:37,915 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 [2021-06-05 17:08:38,230 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 161 [2021-06-05 17:08:38,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:08:38,592 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 73 [2021-06-05 17:08:38,592 INFO L628 ElimStorePlain]: treesize reduction 588, result has 22.5 percent of original size [2021-06-05 17:08:38,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:38,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:756 [2021-06-05 17:08:39,025 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2021-06-05 17:08:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:39,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848159135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:39,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:39,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 17:08:39,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006309047] [2021-06-05 17:08:39,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:08:39,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:08:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:08:39,206 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) [2021-06-05 17:08:40,186 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 39 [2021-06-05 17:08:41,396 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 17:08:44,725 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 17:08:44,994 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-05 17:08:45,218 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 17:08:45,363 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2021-06-05 17:08:45,645 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-06-05 17:08:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:46,032 INFO L93 Difference]: Finished difference Result 99242 states and 366200 transitions. [2021-06-05 17:08:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 17:08:46,033 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 [2021-06-05 17:08:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:46,308 INFO L225 Difference]: With dead ends: 99242 [2021-06-05 17:08:46,308 INFO L226 Difference]: Without dead ends: 99212 [2021-06-05 17:08:46,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 5620.6ms TimeCoverageRelationStatistics Valid=882, Invalid=6774, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 17:08:46,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99212 states. [2021-06-05 17:08:47,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99212 to 51295. [2021-06-05 17:08:47,939 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) [2021-06-05 17:08:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51295 states to 51295 states and 198793 transitions. [2021-06-05 17:08:48,101 INFO L78 Accepts]: Start accepts. Automaton has 51295 states and 198793 transitions. Word has length 30 [2021-06-05 17:08:48,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:48,101 INFO L482 AbstractCegarLoop]: Abstraction has 51295 states and 198793 transitions. [2021-06-05 17:08:48,101 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) [2021-06-05 17:08:48,101 INFO L276 IsEmpty]: Start isEmpty. Operand 51295 states and 198793 transitions. [2021-06-05 17:08:48,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:48,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:48,186 INFO L521 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] [2021-06-05 17:08:48,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:48,387 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:48,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:48,387 INFO L82 PathProgramCache]: Analyzing trace with hash 714714600, now seen corresponding path program 208 times [2021-06-05 17:08:48,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:48,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280793269] [2021-06-05 17:08:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:48,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:48,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280793269] [2021-06-05 17:08:48,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280793269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:48,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151195060] [2021-06-05 17:08:48,577 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 [2021-06-05 17:08:48,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:08:48,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:48,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:08:48,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:49,015 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-06-05 17:08:49,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:49,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:49,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:49,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:49,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:49,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:49,252 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 [2021-06-05 17:08:49,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:08:49,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:49,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:49,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 17:08:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:49,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151195060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:49,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:49,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:08:49,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254982912] [2021-06-05 17:08:49,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:08:49,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:49,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:08:49,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:08:49,277 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) [2021-06-05 17:08:52,509 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-05 17:08:53,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:53,529 INFO L93 Difference]: Finished difference Result 88709 states and 330422 transitions. [2021-06-05 17:08:53,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:08:53,530 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 [2021-06-05 17:08:53,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:53,766 INFO L225 Difference]: With dead ends: 88709 [2021-06-05 17:08:53,766 INFO L226 Difference]: Without dead ends: 88679 [2021-06-05 17:08:53,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 3504.5ms TimeCoverageRelationStatistics Valid=694, Invalid=4276, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:08:53,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88679 states. [2021-06-05 17:08:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88679 to 51308. [2021-06-05 17:08:55,366 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) [2021-06-05 17:08:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51308 states to 51308 states and 198848 transitions. [2021-06-05 17:08:55,525 INFO L78 Accepts]: Start accepts. Automaton has 51308 states and 198848 transitions. Word has length 30 [2021-06-05 17:08:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:55,525 INFO L482 AbstractCegarLoop]: Abstraction has 51308 states and 198848 transitions. [2021-06-05 17:08:55,525 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) [2021-06-05 17:08:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 51308 states and 198848 transitions. [2021-06-05 17:08:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:55,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:55,611 INFO L521 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] [2021-06-05 17:08:55,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:55,812 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:55,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1077811610, now seen corresponding path program 209 times [2021-06-05 17:08:55,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:55,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984157302] [2021-06-05 17:08:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:56,111 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-06-05 17:08:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:56,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:56,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984157302] [2021-06-05 17:08:56,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984157302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:56,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356196305] [2021-06-05 17:08:56,205 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 [2021-06-05 17:08:56,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:08:56,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:56,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:08:56,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:56,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:56,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:56,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:56,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:56,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:56,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:56,604 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 [2021-06-05 17:08:56,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:08:56,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:56,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:56,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:5 [2021-06-05 17:08:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:56,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356196305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:56,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:56,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:08:56,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961722937] [2021-06-05 17:08:56,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:08:56,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:56,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:08:56,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:08:56,633 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) [2021-06-05 17:08:59,577 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-05 17:09:01,656 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 17:09:01,947 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-06-05 17:09:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:02,533 INFO L93 Difference]: Finished difference Result 100753 states and 371531 transitions. [2021-06-05 17:09:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:09:02,534 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 [2021-06-05 17:09:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:02,822 INFO L225 Difference]: With dead ends: 100753 [2021-06-05 17:09:02,822 INFO L226 Difference]: Without dead ends: 100723 [2021-06-05 17:09:02,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 4425.6ms TimeCoverageRelationStatistics Valid=829, Invalid=4721, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 17:09:03,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100723 states. [2021-06-05 17:09:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100723 to 51325. [2021-06-05 17:09:04,493 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) [2021-06-05 17:09:04,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51325 states to 51325 states and 198929 transitions. [2021-06-05 17:09:04,660 INFO L78 Accepts]: Start accepts. Automaton has 51325 states and 198929 transitions. Word has length 30 [2021-06-05 17:09:04,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:04,660 INFO L482 AbstractCegarLoop]: Abstraction has 51325 states and 198929 transitions. [2021-06-05 17:09:04,661 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) [2021-06-05 17:09:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand 51325 states and 198929 transitions. [2021-06-05 17:09:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:04,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:04,744 INFO L521 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] [2021-06-05 17:09:04,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-05 17:09:04,944 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1599622906, now seen corresponding path program 210 times [2021-06-05 17:09:04,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:04,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82956345] [2021-06-05 17:09:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:05,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:05,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82956345] [2021-06-05 17:09:05,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82956345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:05,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284151092] [2021-06-05 17:09:05,151 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 [2021-06-05 17:09:05,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:09:05,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 17:09:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:05,527 INFO L354 Elim1Store]: treesize reduction 16, result has 82.0 percent of original size [2021-06-05 17:09:05,527 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 [2021-06-05 17:09:05,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:09:06,587 WARN L205 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 93 [2021-06-05 17:09:06,587 INFO L628 ElimStorePlain]: treesize reduction 561, result has 33.1 percent of original size [2021-06-05 17:09:06,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:09:06,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:129, output treesize:1483 [2021-06-05 17:09:07,676 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 100 [2021-06-05 17:09:07,979 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-06-05 17:09:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:08,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284151092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:08,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:08,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 17:09:08,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127675102] [2021-06-05 17:09:08,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:09:08,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:08,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:09:08,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:09:08,376 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) [2021-06-05 17:09:10,568 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 128 Received shutdown request... [2021-06-05 17:09:13,604 WARN L222 SmtUtils]: Removed 9 from assertion stack [2021-06-05 17:09:13,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 17:09:13,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:13,805 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 17:09:13,806 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 17:09:13,808 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 17:09:13,808 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:09:13 BasicIcfg [2021-06-05 17:09:13,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 17:09:13,809 INFO L168 Benchmark]: Toolchain (without parser) took 759286.93 ms. Allocated memory was 329.3 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 308.4 MB in the beginning and 13.3 GB in the end (delta: -13.0 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.0 GB. [2021-06-05 17:09:13,809 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 329.3 MB. Free memory was 309.6 MB in the beginning and 309.5 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:09:13,809 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.90 ms. Allocated memory is still 329.3 MB. Free memory was 308.4 MB in the beginning and 306.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:09:13,809 INFO L168 Benchmark]: Boogie Preprocessor took 18.91 ms. Allocated memory is still 329.3 MB. Free memory was 306.9 MB in the beginning and 305.9 MB in the end (delta: 986.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:09:13,809 INFO L168 Benchmark]: RCFGBuilder took 300.41 ms. Allocated memory is still 329.3 MB. Free memory was 305.9 MB in the beginning and 293.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 17:09:13,809 INFO L168 Benchmark]: TraceAbstraction took 758923.85 ms. Allocated memory was 329.3 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 292.8 MB in the beginning and 13.3 GB in the end (delta: -13.0 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.0 GB. [2021-06-05 17:09:13,810 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 0.13 ms. Allocated memory is still 329.3 MB. Free memory was 309.6 MB in the beginning and 309.5 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.90 ms. Allocated memory is still 329.3 MB. Free memory was 308.4 MB in the beginning and 306.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.91 ms. Allocated memory is still 329.3 MB. Free memory was 306.9 MB in the beginning and 305.9 MB in the end (delta: 986.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 300.41 ms. Allocated memory is still 329.3 MB. Free memory was 305.9 MB in the beginning and 293.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 758923.85 ms. Allocated memory was 329.3 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 292.8 MB in the beginning and 13.3 GB in the end (delta: -13.0 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (51325states) and FLOYD_HOARE automaton (currently 59 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 69 for 71ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (51325states) and FLOYD_HOARE automaton (currently 59 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 69 for 71ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (51325states) and FLOYD_HOARE automaton (currently 59 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 69 for 71ms.. - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (51325states) and FLOYD_HOARE automaton (currently 59 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 69 for 71ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 758797.0ms, OverallIterations: 302, TraceHistogramMax: 3, EmptinessCheckTime: 9859.8ms, AutomataDifference: 425649.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 42.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14930 SDtfs, 84689 SDslu, 125407 SDs, 0 SdLazy, 208952 SolverSat, 15129 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 104482.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20121 GetRequests, 6343 SyntacticMatches, 373 SemanticMatches, 13404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236853 ImplicationChecksByTransitivity, 290331.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55780occurred in iteration=259, InterpolantAutomatonStates: 11693, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 162174.6ms AutomataMinimizationTime, 301 MinimizatonAttempts, 2439722 StatesRemovedByMinimization, 300 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 956.9ms SsaConstructionTime, 3184.0ms SatisfiabilityAnalysisTime, 89720.2ms InterpolantComputationTime, 16318 NumberOfCodeBlocks, 16318 NumberOfCodeBlocksAsserted, 1053 NumberOfCheckSat, 15716 ConstructedInterpolants, 392 QuantifiedInterpolants, 191650 SizeOfPredicates, 1448 NumberOfNonLiveVariables, 21250 ConjunctsInSsa, 5274 ConjunctsInUnsatCore, 602 InterpolantComputations, 2 PerfectInterpolantSequences, 1056/5525 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