/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:22:40,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:22:40,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:22:40,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:22:40,886 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-11 00:22:40,911 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:22:40,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:22:40,912 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:22:40,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:22:40,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:22:40,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:22:40,914 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:22:40,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:22:40,915 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:22:40,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:22:40,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:22:40,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:22:40,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:22:40,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:22:40,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:22:40,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:22:40,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:22:40,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:22:40,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:22:40,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:22:40,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:22:40,917 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:22:40,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:22:40,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:22:40,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:22:40,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:22:40,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:22:40,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:22:40,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:22:40,917 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:22:40,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:22:40,918 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:22:41,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:22:41,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:22:41,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:22:41,177 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:22:41,178 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:22:41,179 INFO L432 ainManager$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 [2021-03-11 00:22:41,179 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' [2021-03-11 00:22:41,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:22:41,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:22:41,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:22:41,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:22:41,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:22:41,219 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 11.03 12:22:41" (1/1) ... [2021-03-11 00:22:41,225 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 11.03 12:22:41" (1/1) ... [2021-03-11 00:22:41,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:22:41,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:22:41,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:22:41,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:22:41,237 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 11.03 12:22:41" (1/1) ... [2021-03-11 00:22:41,237 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 11.03 12:22:41" (1/1) ... [2021-03-11 00:22:41,238 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 11.03 12:22:41" (1/1) ... [2021-03-11 00:22:41,238 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 11.03 12:22:41" (1/1) ... [2021-03-11 00:22:41,241 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 11.03 12:22:41" (1/1) ... [2021-03-11 00:22:41,244 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 11.03 12:22:41" (1/1) ... [2021-03-11 00:22:41,245 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 11.03 12:22:41" (1/1) ... [2021-03-11 00:22:41,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:22:41,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:22:41,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:22:41,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:22:41,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:41" (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 [2021-03-11 00:22:41,308 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:22:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:22:41,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:22:41,309 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:22:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:22:41,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:22:41,309 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:22:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:22:41,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:22:41,310 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 00:22:41,310 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 00:22:41,310 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 00:22:41,311 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:22:41,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:22:41,469 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:22:41,471 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:22:41 BoogieIcfgContainer [2021-03-11 00:22:41,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:22:41,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:22:41,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:22:41,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:22:41,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:22:41" (1/2) ... [2021-03-11 00:22:41,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca72565 and model type sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:22:41, skipping insertion in model container [2021-03-11 00:22:41,478 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 11.03 12:22:41" (2/2) ... [2021-03-11 00:22:41,479 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-array-hom.wvr.bpl [2021-03-11 00:22:41,483 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:22:41,483 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:22:41,485 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:22:41,486 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:22:41,539 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 00:22:41,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 00:22:41,565 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:22:41,565 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:22:41,565 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:22:41,566 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:22:41,566 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:22:41,566 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:22:41,566 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:22:41,566 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:22:41,573 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-03-11 00:22:41,595 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) [2021-03-11 00:22:41,597 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) [2021-03-11 00:22:41,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-11 00:22:41,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:41,603 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:41,603 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:41,609 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-03-11 00:22:41,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:41,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325554017] [2021-03-11 00:22:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:41,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325554017] [2021-03-11 00:22:41,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:22:41,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:22:41,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937817059] [2021-03-11 00:22:41,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:22:41,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:41,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:22:41,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:22:41,792 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) [2021-03-11 00:22:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:41,877 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-03-11 00:22:41,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:22:41,878 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 [2021-03-11 00:22:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:41,890 INFO L225 Difference]: With dead ends: 154 [2021-03-11 00:22:41,890 INFO L226 Difference]: Without dead ends: 154 [2021-03-11 00:22:41,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:22:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-03-11 00:22:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-03-11 00:22:41,932 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) [2021-03-11 00:22:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-03-11 00:22:41,934 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-03-11 00:22:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:41,935 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-03-11 00:22:41,935 INFO L481 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) [2021-03-11 00:22:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-03-11 00:22:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:22:41,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:41,936 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:41,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:22:41,936 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-03-11 00:22:41,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:41,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770148874] [2021-03-11 00:22:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:41,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770148874] [2021-03-11 00:22:41,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:22:41,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:22:41,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067471299] [2021-03-11 00:22:41,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 00:22:41,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:41,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 00:22:41,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 00:22:41,975 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) [2021-03-11 00:22:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:41,998 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-03-11 00:22:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 00:22:41,998 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 [2021-03-11 00:22:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:41,999 INFO L225 Difference]: With dead ends: 158 [2021-03-11 00:22:41,999 INFO L226 Difference]: Without dead ends: 158 [2021-03-11 00:22:42,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:22:42,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-11 00:22:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-03-11 00:22:42,007 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) [2021-03-11 00:22:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-03-11 00:22:42,008 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-03-11 00:22:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:42,008 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-03-11 00:22:42,008 INFO L481 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) [2021-03-11 00:22:42,008 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-03-11 00:22:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:22:42,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:42,009 INFO L519 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] [2021-03-11 00:22:42,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 00:22:42,010 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:42,010 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-03-11 00:22:42,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:42,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288410407] [2021-03-11 00:22:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:42,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288410407] [2021-03-11 00:22:42,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893692875] [2021-03-11 00:22:42,335 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 [2021-03-11 00:22:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:42,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:22:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:42,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:22:42,672 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 [2021-03-11 00:22:42,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:42,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:42,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:42,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-03-11 00:22:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:42,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:42,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:42,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281354911] [2021-03-11 00:22:42,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:42,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:42,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:42,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:42,703 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) [2021-03-11 00:22:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:42,884 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-03-11 00:22:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:22:42,885 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 [2021-03-11 00:22:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:42,892 INFO L225 Difference]: With dead ends: 330 [2021-03-11 00:22:42,892 INFO L226 Difference]: Without dead ends: 315 [2021-03-11 00:22:42,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:22:42,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-11 00:22:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-03-11 00:22:42,912 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) [2021-03-11 00:22:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-03-11 00:22:42,913 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-03-11 00:22:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:42,913 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-03-11 00:22:42,913 INFO L481 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) [2021-03-11 00:22:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-03-11 00:22:42,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:22:42,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:42,914 INFO L519 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] [2021-03-11 00:22:43,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-11 00:22:43,129 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:43,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:43,130 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-03-11 00:22:43,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:43,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444817174] [2021-03-11 00:22:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:43,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444817174] [2021-03-11 00:22:43,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373003612] [2021-03-11 00:22:43,371 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) [2021-03-11 00:22:43,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:43,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:43,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:22:43,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:43,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:43,522 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 [2021-03-11 00:22:43,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:22:43,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:43,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:43,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-03-11 00:22:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:43,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:43,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-03-11 00:22:43,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947046371] [2021-03-11 00:22:43,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:43,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:43,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:43,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:43,613 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) [2021-03-11 00:22:43,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:43,970 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-03-11 00:22:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:22:43,971 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 [2021-03-11 00:22:43,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:43,973 INFO L225 Difference]: With dead ends: 374 [2021-03-11 00:22:43,973 INFO L226 Difference]: Without dead ends: 359 [2021-03-11 00:22:43,974 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:22:43,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-03-11 00:22:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-03-11 00:22:43,984 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) [2021-03-11 00:22:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-03-11 00:22:43,985 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-03-11 00:22:43,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:43,985 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-03-11 00:22:43,986 INFO L481 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) [2021-03-11 00:22:43,986 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-03-11 00:22:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:22:43,991 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:43,991 INFO L519 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] [2021-03-11 00:22:44,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:44,208 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:44,208 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-03-11 00:22:44,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:44,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604306586] [2021-03-11 00:22:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:44,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604306586] [2021-03-11 00:22:44,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145568011] [2021-03-11 00:22:44,359 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 [2021-03-11 00:22:44,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:22:44,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:44,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:22:44,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:44,474 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 [2021-03-11 00:22:44,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:44,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:44,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:44,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-03-11 00:22:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:44,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:44,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:22:44,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345372485] [2021-03-11 00:22:44,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:44,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:44,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:44,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:44,510 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) [2021-03-11 00:22:44,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:44,646 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-03-11 00:22:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:22:44,648 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 [2021-03-11 00:22:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:44,650 INFO L225 Difference]: With dead ends: 296 [2021-03-11 00:22:44,650 INFO L226 Difference]: Without dead ends: 281 [2021-03-11 00:22:44,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:22:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-03-11 00:22:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-03-11 00:22:44,654 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) [2021-03-11 00:22:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-03-11 00:22:44,655 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-03-11 00:22:44,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:44,656 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-03-11 00:22:44,656 INFO L481 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) [2021-03-11 00:22:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-03-11 00:22:44,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:22:44,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:44,658 INFO L519 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] [2021-03-11 00:22:44,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:44,876 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-03-11 00:22:44,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:44,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512331459] [2021-03-11 00:22:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:45,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512331459] [2021-03-11 00:22:45,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882110603] [2021-03-11 00:22:45,027 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 [2021-03-11 00:22:45,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:45,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:45,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:22:45,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:45,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:45,127 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 [2021-03-11 00:22:45,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:22:45,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:45,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:45,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2021-03-11 00:22:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:45,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:45,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:45,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369683862] [2021-03-11 00:22:45,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:45,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:45,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:45,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:45,186 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) [2021-03-11 00:22:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:45,387 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-03-11 00:22:45,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:22:45,387 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 [2021-03-11 00:22:45,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:45,390 INFO L225 Difference]: With dead ends: 425 [2021-03-11 00:22:45,391 INFO L226 Difference]: Without dead ends: 410 [2021-03-11 00:22:45,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:22:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-03-11 00:22:45,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-03-11 00:22:45,410 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) [2021-03-11 00:22:45,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-03-11 00:22:45,411 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-03-11 00:22:45,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:45,411 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-03-11 00:22:45,411 INFO L481 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) [2021-03-11 00:22:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-03-11 00:22:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:45,412 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:45,412 INFO L519 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] [2021-03-11 00:22:45,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:45,627 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:45,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:45,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-03-11 00:22:45,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:45,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922686879] [2021-03-11 00:22:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:45,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922686879] [2021-03-11 00:22:45,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093532888] [2021-03-11 00:22:45,666 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 [2021-03-11 00:22:45,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:22:45,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:45,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:45,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:45,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:45,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:22:45,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818054841] [2021-03-11 00:22:45,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:45,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:45,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:45,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:45,767 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) [2021-03-11 00:22:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:46,107 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-03-11 00:22:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:46,108 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 [2021-03-11 00:22:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:46,113 INFO L225 Difference]: With dead ends: 619 [2021-03-11 00:22:46,113 INFO L226 Difference]: Without dead ends: 619 [2021-03-11 00:22:46,113 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:22:46,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-03-11 00:22:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-03-11 00:22:46,120 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) [2021-03-11 00:22:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-03-11 00:22:46,121 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-03-11 00:22:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:46,123 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-03-11 00:22:46,123 INFO L481 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) [2021-03-11 00:22:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-03-11 00:22:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:46,124 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:46,124 INFO L519 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] [2021-03-11 00:22:46,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-11 00:22:46,340 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:46,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-03-11 00:22:46,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:46,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016381993] [2021-03-11 00:22:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:46,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016381993] [2021-03-11 00:22:46,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943152495] [2021-03-11 00:22:46,375 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 [2021-03-11 00:22:46,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:22:46,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:46,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:46,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:46,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:46,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:46,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449076358] [2021-03-11 00:22:46,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:46,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:46,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:46,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:46,488 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) [2021-03-11 00:22:47,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:47,188 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-03-11 00:22:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:22:47,188 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 [2021-03-11 00:22:47,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:47,192 INFO L225 Difference]: With dead ends: 1078 [2021-03-11 00:22:47,192 INFO L226 Difference]: Without dead ends: 1078 [2021-03-11 00:22:47,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 396.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:22:47,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-03-11 00:22:47,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-03-11 00:22:47,203 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) [2021-03-11 00:22:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-03-11 00:22:47,204 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-03-11 00:22:47,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:47,205 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-03-11 00:22:47,205 INFO L481 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) [2021-03-11 00:22:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-03-11 00:22:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:47,208 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:47,208 INFO L519 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] [2021-03-11 00:22:47,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:47,423 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:47,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-03-11 00:22:47,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:47,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961270006] [2021-03-11 00:22:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:47,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961270006] [2021-03-11 00:22:47,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802130839] [2021-03-11 00:22:47,465 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 [2021-03-11 00:22:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:47,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:47,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:47,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:47,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:47,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068609936] [2021-03-11 00:22:47,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:47,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:47,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:47,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:47,579 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) [2021-03-11 00:22:48,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:48,154 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-03-11 00:22:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:22:48,155 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 [2021-03-11 00:22:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:48,159 INFO L225 Difference]: With dead ends: 951 [2021-03-11 00:22:48,159 INFO L226 Difference]: Without dead ends: 951 [2021-03-11 00:22:48,159 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:22:48,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-03-11 00:22:48,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-03-11 00:22:48,167 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) [2021-03-11 00:22:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-03-11 00:22:48,168 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-03-11 00:22:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:48,168 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-03-11 00:22:48,168 INFO L481 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) [2021-03-11 00:22:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-03-11 00:22:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:48,169 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:48,169 INFO L519 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] [2021-03-11 00:22:48,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:48,384 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-03-11 00:22:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:48,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574408031] [2021-03-11 00:22:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:48,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574408031] [2021-03-11 00:22:48,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712904955] [2021-03-11 00:22:48,413 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) [2021-03-11 00:22:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:48,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:22:48,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:48,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:48,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:22:48,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717038687] [2021-03-11 00:22:48,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:22:48,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:48,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:22:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:22:48,498 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) [2021-03-11 00:22:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:48,595 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-03-11 00:22:48,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:22:48,595 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 [2021-03-11 00:22:48,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:48,598 INFO L225 Difference]: With dead ends: 669 [2021-03-11 00:22:48,598 INFO L226 Difference]: Without dead ends: 663 [2021-03-11 00:22:48,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:48,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-03-11 00:22:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-03-11 00:22:48,606 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) [2021-03-11 00:22:48,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-03-11 00:22:48,608 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-03-11 00:22:48,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:48,609 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-03-11 00:22:48,609 INFO L481 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) [2021-03-11 00:22:48,609 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-03-11 00:22:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:48,610 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:48,610 INFO L519 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] [2021-03-11 00:22:48,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-11 00:22:48,823 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:48,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:48,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-03-11 00:22:48,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:48,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121719877] [2021-03-11 00:22:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:48,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121719877] [2021-03-11 00:22:48,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903471840] [2021-03-11 00:22:48,864 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 [2021-03-11 00:22:48,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:48,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:48,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:48,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:48,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:22:48,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944583753] [2021-03-11 00:22:48,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:48,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:48,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:48,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:48,957 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) [2021-03-11 00:22:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:49,086 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-03-11 00:22:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:22:49,087 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 [2021-03-11 00:22:49,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:49,091 INFO L225 Difference]: With dead ends: 710 [2021-03-11 00:22:49,091 INFO L226 Difference]: Without dead ends: 672 [2021-03-11 00:22:49,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:22:49,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-03-11 00:22:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-03-11 00:22:49,102 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) [2021-03-11 00:22:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-03-11 00:22:49,104 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-03-11 00:22:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:49,104 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-03-11 00:22:49,104 INFO L481 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) [2021-03-11 00:22:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-03-11 00:22:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:49,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:49,106 INFO L519 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] [2021-03-11 00:22:49,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-11 00:22:49,319 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-03-11 00:22:49,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:49,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814469746] [2021-03-11 00:22:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:49,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814469746] [2021-03-11 00:22:49,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265449901] [2021-03-11 00:22:49,346 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 [2021-03-11 00:22:49,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:49,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:49,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:22:49,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:49,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:49,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:22:49,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373288312] [2021-03-11 00:22:49,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:22:49,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:49,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:22:49,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:22:49,423 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) [2021-03-11 00:22:49,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:49,512 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-03-11 00:22:49,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:22:49,513 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 [2021-03-11 00:22:49,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:49,515 INFO L225 Difference]: With dead ends: 830 [2021-03-11 00:22:49,516 INFO L226 Difference]: Without dead ends: 830 [2021-03-11 00:22:49,516 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-03-11 00:22:49,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-03-11 00:22:49,526 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) [2021-03-11 00:22:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-03-11 00:22:49,527 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-03-11 00:22:49,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:49,528 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-03-11 00:22:49,528 INFO L481 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) [2021-03-11 00:22:49,528 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-03-11 00:22:49,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:49,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:49,529 INFO L519 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] [2021-03-11 00:22:49,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-11 00:22:49,743 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:49,744 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-03-11 00:22:49,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:49,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691268653] [2021-03-11 00:22:49,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:49,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691268653] [2021-03-11 00:22:49,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171114135] [2021-03-11 00:22:49,780 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 [2021-03-11 00:22:49,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:22:49,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:49,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:49,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:49,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:49,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:49,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958014868] [2021-03-11 00:22:49,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:49,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:49,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:49,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:49,860 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) [2021-03-11 00:22:50,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:50,087 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-03-11 00:22:50,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:22:50,088 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 [2021-03-11 00:22:50,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:50,092 INFO L225 Difference]: With dead ends: 1196 [2021-03-11 00:22:50,092 INFO L226 Difference]: Without dead ends: 1196 [2021-03-11 00:22:50,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:22:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-03-11 00:22:50,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-03-11 00:22:50,107 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) [2021-03-11 00:22:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-03-11 00:22:50,128 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-03-11 00:22:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:50,128 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-03-11 00:22:50,129 INFO L481 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) [2021-03-11 00:22:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-03-11 00:22:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:50,130 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:50,130 INFO L519 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] [2021-03-11 00:22:50,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-11 00:22:50,336 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:50,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-03-11 00:22:50,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:50,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980435281] [2021-03-11 00:22:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:50,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980435281] [2021-03-11 00:22:50,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089994207] [2021-03-11 00:22:50,369 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 [2021-03-11 00:22:50,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:50,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:50,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:50,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:50,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:50,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:50,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376862719] [2021-03-11 00:22:50,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:50,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:50,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:50,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:50,460 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) [2021-03-11 00:22:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:50,836 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-03-11 00:22:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:22:50,836 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 [2021-03-11 00:22:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:50,841 INFO L225 Difference]: With dead ends: 1492 [2021-03-11 00:22:50,841 INFO L226 Difference]: Without dead ends: 1492 [2021-03-11 00:22:50,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:22:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-11 00:22:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-03-11 00:22:50,855 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) [2021-03-11 00:22:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-03-11 00:22:50,857 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-03-11 00:22:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:50,857 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-03-11 00:22:50,857 INFO L481 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) [2021-03-11 00:22:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-03-11 00:22:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:50,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:50,859 INFO L519 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] [2021-03-11 00:22:51,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-11 00:22:51,075 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:51,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:51,076 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-03-11 00:22:51,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:51,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571588825] [2021-03-11 00:22:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:51,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571588825] [2021-03-11 00:22:51,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120696094] [2021-03-11 00:22:51,107 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 [2021-03-11 00:22:51,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:51,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:51,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:51,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:51,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:22:51,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859439186] [2021-03-11 00:22:51,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:51,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:51,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:51,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:51,212 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) [2021-03-11 00:22:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:51,442 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-03-11 00:22:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:22:51,442 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 [2021-03-11 00:22:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:51,447 INFO L225 Difference]: With dead ends: 1258 [2021-03-11 00:22:51,447 INFO L226 Difference]: Without dead ends: 1248 [2021-03-11 00:22:51,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:22:51,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-03-11 00:22:51,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-03-11 00:22:51,465 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) [2021-03-11 00:22:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-03-11 00:22:51,467 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-03-11 00:22:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:51,468 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-03-11 00:22:51,468 INFO L481 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) [2021-03-11 00:22:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-03-11 00:22:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:51,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:51,469 INFO L519 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] [2021-03-11 00:22:51,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:51,682 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:51,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-03-11 00:22:51,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:51,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028672417] [2021-03-11 00:22:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:51,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028672417] [2021-03-11 00:22:51,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749036881] [2021-03-11 00:22:51,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:22:51,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:22:51,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:51,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:51,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:51,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:51,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:22:51,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816644106] [2021-03-11 00:22:51,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:51,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:51,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:51,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:51,832 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) [2021-03-11 00:22:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:52,070 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-03-11 00:22:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:22:52,071 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 [2021-03-11 00:22:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:52,075 INFO L225 Difference]: With dead ends: 1329 [2021-03-11 00:22:52,075 INFO L226 Difference]: Without dead ends: 1329 [2021-03-11 00:22:52,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:22:52,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-03-11 00:22:52,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-03-11 00:22:52,090 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) [2021-03-11 00:22:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-03-11 00:22:52,091 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-03-11 00:22:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:52,092 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-03-11 00:22:52,092 INFO L481 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) [2021-03-11 00:22:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-03-11 00:22:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:52,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:52,093 INFO L519 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] [2021-03-11 00:22:52,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:52,305 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-03-11 00:22:52,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:52,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577594840] [2021-03-11 00:22:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:52,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577594840] [2021-03-11 00:22:52,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967043461] [2021-03-11 00:22:52,344 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 [2021-03-11 00:22:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:52,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:52,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:22:52,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46931200] [2021-03-11 00:22:52,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:22:52,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:52,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:22:52,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:22:52,428 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) [2021-03-11 00:22:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:52,756 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-03-11 00:22:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:22:52,756 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 [2021-03-11 00:22:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:52,761 INFO L225 Difference]: With dead ends: 1548 [2021-03-11 00:22:52,761 INFO L226 Difference]: Without dead ends: 1544 [2021-03-11 00:22:52,761 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:22:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-03-11 00:22:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-03-11 00:22:52,777 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) [2021-03-11 00:22:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-03-11 00:22:52,779 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-03-11 00:22:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:52,779 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-03-11 00:22:52,779 INFO L481 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) [2021-03-11 00:22:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-03-11 00:22:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:52,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:52,781 INFO L519 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] [2021-03-11 00:22:52,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-11 00:22:52,996 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:52,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-03-11 00:22:52,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:52,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892321199] [2021-03-11 00:22:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:53,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892321199] [2021-03-11 00:22:53,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115982367] [2021-03-11 00:22:53,030 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 [2021-03-11 00:22:53,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:53,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:53,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:53,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:53,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:53,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:53,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507913356] [2021-03-11 00:22:53,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:53,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:53,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:53,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:53,129 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) [2021-03-11 00:22:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:53,795 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-03-11 00:22:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:22:53,795 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 [2021-03-11 00:22:53,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:53,810 INFO L225 Difference]: With dead ends: 2734 [2021-03-11 00:22:53,810 INFO L226 Difference]: Without dead ends: 2734 [2021-03-11 00:22:53,811 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:22:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-03-11 00:22:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-03-11 00:22:53,835 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) [2021-03-11 00:22:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-03-11 00:22:53,837 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-03-11 00:22:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:53,837 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-03-11 00:22:53,837 INFO L481 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) [2021-03-11 00:22:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-03-11 00:22:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:53,838 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:53,838 INFO L519 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] [2021-03-11 00:22:54,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:54,057 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-03-11 00:22:54,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:54,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801885067] [2021-03-11 00:22:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:54,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801885067] [2021-03-11 00:22:54,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597705540] [2021-03-11 00:22:54,089 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 [2021-03-11 00:22:54,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:22:54,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:54,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:54,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:54,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:54,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:54,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615157646] [2021-03-11 00:22:54,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:54,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:54,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:54,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:54,202 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) [2021-03-11 00:22:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:54,812 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-03-11 00:22:54,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:22:54,812 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 [2021-03-11 00:22:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:54,818 INFO L225 Difference]: With dead ends: 2693 [2021-03-11 00:22:54,818 INFO L226 Difference]: Without dead ends: 2693 [2021-03-11 00:22:54,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:22:54,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-03-11 00:22:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-03-11 00:22:54,840 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) [2021-03-11 00:22:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-03-11 00:22:54,842 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-03-11 00:22:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:54,842 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-03-11 00:22:54,843 INFO L481 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) [2021-03-11 00:22:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-03-11 00:22:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:54,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:54,844 INFO L519 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] [2021-03-11 00:22:55,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-11 00:22:55,059 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-03-11 00:22:55,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:55,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268790823] [2021-03-11 00:22:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:55,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268790823] [2021-03-11 00:22:55,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182945039] [2021-03-11 00:22:55,094 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 [2021-03-11 00:22:55,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:55,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:55,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:55,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:55,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:55,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:22:55,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72536167] [2021-03-11 00:22:55,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:55,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:55,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:55,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:55,177 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) [2021-03-11 00:22:55,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:55,735 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-03-11 00:22:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:22:55,736 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 [2021-03-11 00:22:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:55,741 INFO L225 Difference]: With dead ends: 2677 [2021-03-11 00:22:55,741 INFO L226 Difference]: Without dead ends: 2677 [2021-03-11 00:22:55,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:22:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-03-11 00:22:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-03-11 00:22:55,763 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) [2021-03-11 00:22:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-03-11 00:22:55,765 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-03-11 00:22:55,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:55,765 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-03-11 00:22:55,765 INFO L481 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) [2021-03-11 00:22:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-03-11 00:22:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:55,767 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:55,767 INFO L519 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] [2021-03-11 00:22:55,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-11 00:22:55,974 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:55,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:55,974 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-03-11 00:22:55,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:55,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16278905] [2021-03-11 00:22:55,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16278905] [2021-03-11 00:22:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028903407] [2021-03-11 00:22:56,008 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 [2021-03-11 00:22:56,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:22:56,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:56,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:56,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:56,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:56,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:22:56,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509984003] [2021-03-11 00:22:56,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:22:56,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:56,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:22:56,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:56,099 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) [2021-03-11 00:22:56,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:56,570 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-03-11 00:22:56,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:22:56,570 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 [2021-03-11 00:22:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:56,574 INFO L225 Difference]: With dead ends: 2474 [2021-03-11 00:22:56,575 INFO L226 Difference]: Without dead ends: 2470 [2021-03-11 00:22:56,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:22:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-03-11 00:22:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-03-11 00:22:56,595 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) [2021-03-11 00:22:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-03-11 00:22:56,597 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-03-11 00:22:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:56,597 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-03-11 00:22:56,597 INFO L481 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) [2021-03-11 00:22:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-03-11 00:22:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:56,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:56,599 INFO L519 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] [2021-03-11 00:22:56,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-11 00:22:56,813 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:56,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:56,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-03-11 00:22:56,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:56,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18427429] [2021-03-11 00:22:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:56,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18427429] [2021-03-11 00:22:56,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932570595] [2021-03-11 00:22:56,848 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 [2021-03-11 00:22:56,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:22:56,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:56,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:56,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:56,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:56,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:56,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845371030] [2021-03-11 00:22:56,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:56,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:56,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:56,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:56,946 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) [2021-03-11 00:22:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:57,515 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-03-11 00:22:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:22:57,515 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 [2021-03-11 00:22:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:57,520 INFO L225 Difference]: With dead ends: 2514 [2021-03-11 00:22:57,520 INFO L226 Difference]: Without dead ends: 2514 [2021-03-11 00:22:57,521 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:22:57,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-11 00:22:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-03-11 00:22:57,541 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) [2021-03-11 00:22:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-03-11 00:22:57,543 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-03-11 00:22:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:57,543 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-03-11 00:22:57,543 INFO L481 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) [2021-03-11 00:22:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-03-11 00:22:57,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:57,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:57,545 INFO L519 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] [2021-03-11 00:22:57,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-11 00:22:57,759 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:57,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-03-11 00:22:57,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:57,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320931110] [2021-03-11 00:22:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:57,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320931110] [2021-03-11 00:22:57,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560108704] [2021-03-11 00:22:57,789 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 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 [2021-03-11 00:22:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:57,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:57,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:57,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:57,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:22:57,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953987227] [2021-03-11 00:22:57,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:22:57,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:57,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:22:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:22:57,880 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) [2021-03-11 00:22:58,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:58,445 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-03-11 00:22:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:22:58,445 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 [2021-03-11 00:22:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:58,450 INFO L225 Difference]: With dead ends: 2332 [2021-03-11 00:22:58,450 INFO L226 Difference]: Without dead ends: 2328 [2021-03-11 00:22:58,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:22:58,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-03-11 00:22:58,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-03-11 00:22:58,469 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) [2021-03-11 00:22:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-03-11 00:22:58,471 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-03-11 00:22:58,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:58,472 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-03-11 00:22:58,472 INFO L481 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) [2021-03-11 00:22:58,472 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-03-11 00:22:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:58,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:58,473 INFO L519 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] [2021-03-11 00:22:58,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-11 00:22:58,683 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:58,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-03-11 00:22:58,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:58,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362322619] [2021-03-11 00:22:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:58,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362322619] [2021-03-11 00:22:58,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424400284] [2021-03-11 00:22:58,706 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 [2021-03-11 00:22:58,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:22:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:22:58,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:22:58,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:58,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:22:58,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16512005] [2021-03-11 00:22:58,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:22:58,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:58,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:22:58,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:22:58,778 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) [2021-03-11 00:22:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:58,845 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-03-11 00:22:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:22:58,845 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 [2021-03-11 00:22:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:58,847 INFO L225 Difference]: With dead ends: 929 [2021-03-11 00:22:58,847 INFO L226 Difference]: Without dead ends: 929 [2021-03-11 00:22:58,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:22:58,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-03-11 00:22:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-03-11 00:22:58,856 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) [2021-03-11 00:22:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-03-11 00:22:58,858 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-03-11 00:22:58,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:58,858 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-03-11 00:22:58,858 INFO L481 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) [2021-03-11 00:22:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-03-11 00:22:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:58,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:58,860 INFO L519 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] [2021-03-11 00:22:59,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:59,075 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:59,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:59,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-03-11 00:22:59,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:59,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920744592] [2021-03-11 00:22:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:59,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920744592] [2021-03-11 00:22:59,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93847536] [2021-03-11 00:22:59,111 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 [2021-03-11 00:22:59,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:59,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:59,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:59,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:59,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:59,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:22:59,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527473355] [2021-03-11 00:22:59,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:22:59,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:59,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:22:59,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:22:59,176 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) [2021-03-11 00:22:59,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:59,435 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-03-11 00:22:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:59,435 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 [2021-03-11 00:22:59,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:59,441 INFO L225 Difference]: With dead ends: 1555 [2021-03-11 00:22:59,441 INFO L226 Difference]: Without dead ends: 1555 [2021-03-11 00:22:59,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:22:59,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-03-11 00:22:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-03-11 00:22:59,465 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) [2021-03-11 00:22:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-03-11 00:22:59,467 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-03-11 00:22:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:59,468 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-03-11 00:22:59,468 INFO L481 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) [2021-03-11 00:22:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-03-11 00:22:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:22:59,470 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:59,470 INFO L519 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] [2021-03-11 00:22:59,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-11 00:22:59,683 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:59,683 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-03-11 00:22:59,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:59,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379921465] [2021-03-11 00:22:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:59,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379921465] [2021-03-11 00:22:59,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230150003] [2021-03-11 00:22:59,710 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 [2021-03-11 00:22:59,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:22:59,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:59,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:22:59,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:59,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:59,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:22:59,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315406532] [2021-03-11 00:22:59,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:22:59,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:59,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:22:59,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:22:59,792 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) [2021-03-11 00:23:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:00,025 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-03-11 00:23:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:23:00,025 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 [2021-03-11 00:23:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:00,028 INFO L225 Difference]: With dead ends: 1605 [2021-03-11 00:23:00,028 INFO L226 Difference]: Without dead ends: 1605 [2021-03-11 00:23:00,028 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:23:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-03-11 00:23:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-03-11 00:23:00,044 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) [2021-03-11 00:23:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-03-11 00:23:00,046 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-03-11 00:23:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:00,046 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-03-11 00:23:00,046 INFO L481 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) [2021-03-11 00:23:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-03-11 00:23:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:00,048 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:00,048 INFO L519 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] [2021-03-11 00:23:00,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:00,257 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:00,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:00,258 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-03-11 00:23:00,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:00,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026706167] [2021-03-11 00:23:00,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:23:00,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026706167] [2021-03-11 00:23:00,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97726998] [2021-03-11 00:23:00,285 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 [2021-03-11 00:23:00,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:00,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:00,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:00,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:23:00,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:00,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:23:00,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363557129] [2021-03-11 00:23:00,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:23:00,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:00,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:23:00,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:23:00,360 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) [2021-03-11 00:23:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:00,536 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-03-11 00:23:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:23:00,536 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 [2021-03-11 00:23:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:00,538 INFO L225 Difference]: With dead ends: 1524 [2021-03-11 00:23:00,538 INFO L226 Difference]: Without dead ends: 1520 [2021-03-11 00:23:00,538 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:23:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-03-11 00:23:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-03-11 00:23:00,551 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) [2021-03-11 00:23:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-03-11 00:23:00,553 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-03-11 00:23:00,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:00,553 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-03-11 00:23:00,553 INFO L481 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) [2021-03-11 00:23:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-03-11 00:23:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:00,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:00,555 INFO L519 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] [2021-03-11 00:23:00,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-11 00:23:00,766 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:00,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:00,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-03-11 00:23:00,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:00,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439456343] [2021-03-11 00:23:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:00,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439456343] [2021-03-11 00:23:00,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897634223] [2021-03-11 00:23:00,793 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 [2021-03-11 00:23:00,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:23:00,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:00,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:00,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:00,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:00,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:23:00,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551937777] [2021-03-11 00:23:00,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:23:00,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:00,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:23:00,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:23:00,856 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) [2021-03-11 00:23:01,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:01,059 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-03-11 00:23:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:23:01,059 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 [2021-03-11 00:23:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:01,061 INFO L225 Difference]: With dead ends: 1508 [2021-03-11 00:23:01,061 INFO L226 Difference]: Without dead ends: 1496 [2021-03-11 00:23:01,061 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:23:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-03-11 00:23:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-03-11 00:23:01,074 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) [2021-03-11 00:23:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-03-11 00:23:01,076 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-03-11 00:23:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:01,076 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-03-11 00:23:01,076 INFO L481 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) [2021-03-11 00:23:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-03-11 00:23:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:01,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:01,077 INFO L519 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] [2021-03-11 00:23:01,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:01,288 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:01,293 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-03-11 00:23:01,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:01,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573165309] [2021-03-11 00:23:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:01,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573165309] [2021-03-11 00:23:01,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431044262] [2021-03-11 00:23:01,334 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 [2021-03-11 00:23:01,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:23:01,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:01,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:01,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:01,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:01,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:23:01,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534531239] [2021-03-11 00:23:01,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:23:01,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:01,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:23:01,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:23:01,499 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) [2021-03-11 00:23:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:01,936 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-03-11 00:23:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:23:01,936 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 [2021-03-11 00:23:01,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:01,939 INFO L225 Difference]: With dead ends: 2412 [2021-03-11 00:23:01,939 INFO L226 Difference]: Without dead ends: 2412 [2021-03-11 00:23:01,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:23:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-03-11 00:23:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-03-11 00:23:01,955 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) [2021-03-11 00:23:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-03-11 00:23:01,958 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-03-11 00:23:01,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:01,958 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-03-11 00:23:01,958 INFO L481 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) [2021-03-11 00:23:01,958 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-03-11 00:23:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:01,959 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:01,959 INFO L519 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] [2021-03-11 00:23:02,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-11 00:23:02,170 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:02,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-03-11 00:23:02,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:02,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835065638] [2021-03-11 00:23:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:02,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835065638] [2021-03-11 00:23:02,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116893056] [2021-03-11 00:23:02,202 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) [2021-03-11 00:23:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:02,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:02,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:02,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:02,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:23:02,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007673971] [2021-03-11 00:23:02,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:23:02,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:02,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:23:02,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:23:02,296 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) [2021-03-11 00:23:02,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:02,714 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-03-11 00:23:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:23:02,715 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 [2021-03-11 00:23:02,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:02,718 INFO L225 Difference]: With dead ends: 2335 [2021-03-11 00:23:02,718 INFO L226 Difference]: Without dead ends: 2335 [2021-03-11 00:23:02,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 269.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:23:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-03-11 00:23:02,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-03-11 00:23:02,734 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) [2021-03-11 00:23:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:23:02,736 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:23:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:02,736 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:23:02,737 INFO L481 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) [2021-03-11 00:23:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:23:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:02,738 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:02,738 INFO L519 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] [2021-03-11 00:23:02,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:02,952 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-03-11 00:23:02,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:02,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685014297] [2021-03-11 00:23:02,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:02,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685014297] [2021-03-11 00:23:02,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583016959] [2021-03-11 00:23:02,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:23:03,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:23:03,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:03,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:03,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:03,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:03,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:23:03,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50174927] [2021-03-11 00:23:03,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:23:03,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:03,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:23:03,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:23:03,067 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) [2021-03-11 00:23:03,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:03,438 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-03-11 00:23:03,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:23:03,438 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 [2021-03-11 00:23:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:03,441 INFO L225 Difference]: With dead ends: 2285 [2021-03-11 00:23:03,442 INFO L226 Difference]: Without dead ends: 2285 [2021-03-11 00:23:03,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:23:03,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-03-11 00:23:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-03-11 00:23:03,458 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) [2021-03-11 00:23:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:23:03,460 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:23:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:03,460 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:23:03,460 INFO L481 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) [2021-03-11 00:23:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:23:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:03,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:03,462 INFO L519 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] [2021-03-11 00:23:03,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-11 00:23:03,677 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:03,678 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-03-11 00:23:03,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:03,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941449983] [2021-03-11 00:23:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:03,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941449983] [2021-03-11 00:23:03,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022240726] [2021-03-11 00:23:03,707 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 [2021-03-11 00:23:03,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:23:03,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:03,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:03,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:03,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:03,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:23:03,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570198802] [2021-03-11 00:23:03,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:23:03,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:03,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:23:03,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:23:03,782 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) [2021-03-11 00:23:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:04,104 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-03-11 00:23:04,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:23:04,104 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 [2021-03-11 00:23:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:04,107 INFO L225 Difference]: With dead ends: 2176 [2021-03-11 00:23:04,107 INFO L226 Difference]: Without dead ends: 2172 [2021-03-11 00:23:04,108 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:23:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-03-11 00:23:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-03-11 00:23:04,123 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) [2021-03-11 00:23:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:23:04,124 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:23:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:04,125 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:23:04,125 INFO L481 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) [2021-03-11 00:23:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:23:04,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:04,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:04,126 INFO L519 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] [2021-03-11 00:23:04,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:04,327 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:04,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:04,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-03-11 00:23:04,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:04,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754587781] [2021-03-11 00:23:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:04,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754587781] [2021-03-11 00:23:04,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686577178] [2021-03-11 00:23:04,356 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 [2021-03-11 00:23:04,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:04,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:04,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:04,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:04,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:04,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:23:04,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735248025] [2021-03-11 00:23:04,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:23:04,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:04,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:23:04,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:23:04,445 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) [2021-03-11 00:23:04,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:04,770 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-03-11 00:23:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:23:04,775 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 [2021-03-11 00:23:04,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:04,778 INFO L225 Difference]: With dead ends: 2199 [2021-03-11 00:23:04,778 INFO L226 Difference]: Without dead ends: 2199 [2021-03-11 00:23:04,778 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:23:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-03-11 00:23:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-03-11 00:23:04,793 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) [2021-03-11 00:23:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:23:04,795 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:23:04,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:04,795 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:23:04,795 INFO L481 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) [2021-03-11 00:23:04,795 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:23:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:04,796 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:04,796 INFO L519 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] [2021-03-11 00:23:04,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-11 00:23:04,997 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:04,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:04,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-03-11 00:23:04,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:04,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099211143] [2021-03-11 00:23:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:05,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099211143] [2021-03-11 00:23:05,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842515919] [2021-03-11 00:23:05,028 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 [2021-03-11 00:23:05,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:23:05,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:05,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:05,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:05,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:05,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:23:05,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516249339] [2021-03-11 00:23:05,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:23:05,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:05,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:23:05,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:23:05,114 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) [2021-03-11 00:23:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:05,450 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-03-11 00:23:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:23:05,451 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 [2021-03-11 00:23:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:05,453 INFO L225 Difference]: With dead ends: 2156 [2021-03-11 00:23:05,453 INFO L226 Difference]: Without dead ends: 2152 [2021-03-11 00:23:05,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:23:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-03-11 00:23:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-03-11 00:23:05,469 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) [2021-03-11 00:23:05,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:23:05,471 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:23:05,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:05,471 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:23:05,471 INFO L481 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) [2021-03-11 00:23:05,471 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:23:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:05,472 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:05,472 INFO L519 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] [2021-03-11 00:23:05,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-11 00:23:05,683 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:05,683 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-03-11 00:23:05,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:05,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045403047] [2021-03-11 00:23:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:05,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045403047] [2021-03-11 00:23:05,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80106620] [2021-03-11 00:23:05,716 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 [2021-03-11 00:23:05,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:23:05,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:05,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:05,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:05,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:05,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:23:05,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909589209] [2021-03-11 00:23:05,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:23:05,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:05,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:23:05,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:23:05,789 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) [2021-03-11 00:23:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:06,091 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-03-11 00:23:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:23:06,091 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 [2021-03-11 00:23:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:06,094 INFO L225 Difference]: With dead ends: 2097 [2021-03-11 00:23:06,094 INFO L226 Difference]: Without dead ends: 2097 [2021-03-11 00:23:06,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:23:06,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-03-11 00:23:06,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-03-11 00:23:06,116 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) [2021-03-11 00:23:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-03-11 00:23:06,118 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-03-11 00:23:06,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:06,118 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-03-11 00:23:06,118 INFO L481 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) [2021-03-11 00:23:06,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-03-11 00:23:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:06,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:06,120 INFO L519 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] [2021-03-11 00:23:06,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-11 00:23:06,326 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:06,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:06,327 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-03-11 00:23:06,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:06,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929960911] [2021-03-11 00:23:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:06,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929960911] [2021-03-11 00:23:06,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23532703] [2021-03-11 00:23:06,354 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 [2021-03-11 00:23:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:06,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:06,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:06,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:06,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:23:06,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716768656] [2021-03-11 00:23:06,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:23:06,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:06,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:23:06,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:23:06,430 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) [2021-03-11 00:23:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:06,688 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-03-11 00:23:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:23:06,688 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 [2021-03-11 00:23:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:06,691 INFO L225 Difference]: With dead ends: 1963 [2021-03-11 00:23:06,691 INFO L226 Difference]: Without dead ends: 1959 [2021-03-11 00:23:06,691 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:23:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-03-11 00:23:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-03-11 00:23:06,705 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) [2021-03-11 00:23:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-03-11 00:23:06,707 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-03-11 00:23:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:06,707 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-03-11 00:23:06,708 INFO L481 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) [2021-03-11 00:23:06,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-03-11 00:23:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:06,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:06,709 INFO L519 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] [2021-03-11 00:23:06,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-11 00:23:06,923 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:06,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-03-11 00:23:06,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:06,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731243520] [2021-03-11 00:23:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:06,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731243520] [2021-03-11 00:23:06,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528046049] [2021-03-11 00:23:06,950 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 [2021-03-11 00:23:06,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:23:06,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:06,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:06,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:07,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:07,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:23:07,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064062363] [2021-03-11 00:23:07,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:23:07,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:23:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:23:07,015 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) [2021-03-11 00:23:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:07,201 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-03-11 00:23:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:23:07,201 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 [2021-03-11 00:23:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:07,203 INFO L225 Difference]: With dead ends: 1728 [2021-03-11 00:23:07,203 INFO L226 Difference]: Without dead ends: 1716 [2021-03-11 00:23:07,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:23:07,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-03-11 00:23:07,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-03-11 00:23:07,216 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) [2021-03-11 00:23:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-03-11 00:23:07,218 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-03-11 00:23:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:07,218 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-03-11 00:23:07,218 INFO L481 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) [2021-03-11 00:23:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-03-11 00:23:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:07,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:07,220 INFO L519 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] [2021-03-11 00:23:07,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:07,423 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:07,423 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-03-11 00:23:07,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:07,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112220030] [2021-03-11 00:23:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:07,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112220030] [2021-03-11 00:23:07,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85925766] [2021-03-11 00:23:07,454 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 [2021-03-11 00:23:07,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:23:07,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:07,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:07,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:07,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:07,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:23:07,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822901822] [2021-03-11 00:23:07,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:23:07,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:07,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:23:07,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:23:07,542 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) [2021-03-11 00:23:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:07,856 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-03-11 00:23:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:23:07,856 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 [2021-03-11 00:23:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:07,858 INFO L225 Difference]: With dead ends: 1821 [2021-03-11 00:23:07,858 INFO L226 Difference]: Without dead ends: 1821 [2021-03-11 00:23:07,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:23:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-03-11 00:23:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-03-11 00:23:07,873 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) [2021-03-11 00:23:07,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-03-11 00:23:07,875 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-03-11 00:23:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:07,875 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-03-11 00:23:07,875 INFO L481 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) [2021-03-11 00:23:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-03-11 00:23:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:07,876 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:07,876 INFO L519 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] [2021-03-11 00:23:08,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-03-11 00:23:08,086 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:08,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-03-11 00:23:08,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:08,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669019596] [2021-03-11 00:23:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:08,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669019596] [2021-03-11 00:23:08,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667773257] [2021-03-11 00:23:08,115 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 [2021-03-11 00:23:08,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:08,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:08,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:08,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:08,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:08,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:23:08,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143580348] [2021-03-11 00:23:08,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:23:08,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:08,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:23:08,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:23:08,205 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) [2021-03-11 00:23:08,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:08,456 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-03-11 00:23:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:23:08,457 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 [2021-03-11 00:23:08,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:08,459 INFO L225 Difference]: With dead ends: 1790 [2021-03-11 00:23:08,459 INFO L226 Difference]: Without dead ends: 1786 [2021-03-11 00:23:08,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:23:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-11 00:23:08,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-03-11 00:23:08,473 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) [2021-03-11 00:23:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-03-11 00:23:08,475 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-03-11 00:23:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:08,475 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-03-11 00:23:08,476 INFO L481 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) [2021-03-11 00:23:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-03-11 00:23:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:23:08,477 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:08,477 INFO L519 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] [2021-03-11 00:23:08,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-11 00:23:08,678 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:08,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:08,678 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-03-11 00:23:08,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:08,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212493151] [2021-03-11 00:23:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:08,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212493151] [2021-03-11 00:23:08,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124054607] [2021-03-11 00:23:08,708 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 [2021-03-11 00:23:08,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:23:08,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:08,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:23:08,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:08,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:08,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:23:08,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143104402] [2021-03-11 00:23:08,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:23:08,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:08,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:23:08,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:23:08,779 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) [2021-03-11 00:23:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:08,926 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-03-11 00:23:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:23:08,927 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 [2021-03-11 00:23:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:08,929 INFO L225 Difference]: With dead ends: 1649 [2021-03-11 00:23:08,929 INFO L226 Difference]: Without dead ends: 1637 [2021-03-11 00:23:08,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:23:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-03-11 00:23:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-03-11 00:23:08,942 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) [2021-03-11 00:23:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-03-11 00:23:08,944 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-03-11 00:23:08,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:08,944 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-03-11 00:23:08,944 INFO L481 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) [2021-03-11 00:23:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-03-11 00:23:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:08,946 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:08,946 INFO L519 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] [2021-03-11 00:23:09,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:09,161 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-03-11 00:23:09,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:09,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883958741] [2021-03-11 00:23:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:09,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883958741] [2021-03-11 00:23:09,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190213183] [2021-03-11 00:23:09,372 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 [2021-03-11 00:23:09,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:09,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:09,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:09,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:09,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:09,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:09,575 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 [2021-03-11 00:23:09,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:09,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:09,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:09,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:23:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:09,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:09,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:23:09,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504162237] [2021-03-11 00:23:09,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:23:09,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:09,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:23:09,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:23:09,598 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) [2021-03-11 00:23:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:10,091 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-03-11 00:23:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:23:10,091 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 [2021-03-11 00:23:10,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:10,093 INFO L225 Difference]: With dead ends: 1517 [2021-03-11 00:23:10,093 INFO L226 Difference]: Without dead ends: 1502 [2021-03-11 00:23:10,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 522.5ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:23:10,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-03-11 00:23:10,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-03-11 00:23:10,105 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) [2021-03-11 00:23:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-03-11 00:23:10,108 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-03-11 00:23:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:10,108 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-03-11 00:23:10,108 INFO L481 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) [2021-03-11 00:23:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-03-11 00:23:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:10,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:10,109 INFO L519 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] [2021-03-11 00:23:10,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-11 00:23:10,310 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:10,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:10,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-03-11 00:23:10,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:10,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180514138] [2021-03-11 00:23:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:10,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180514138] [2021-03-11 00:23:10,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74436356] [2021-03-11 00:23:10,506 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) [2021-03-11 00:23:10,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:23:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:10,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:23:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:10,740 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-03-11 00:23:10,741 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 [2021-03-11 00:23:10,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:10,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:10,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:10,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-03-11 00:23:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:10,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:10,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:23:10,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218216002] [2021-03-11 00:23:10,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:23:10,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:10,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:23:10,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:23:10,778 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:23:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:11,566 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-03-11 00:23:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:23:11,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 [2021-03-11 00:23:11,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:11,568 INFO L225 Difference]: With dead ends: 1495 [2021-03-11 00:23:11,568 INFO L226 Difference]: Without dead ends: 1480 [2021-03-11 00:23:11,569 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 783.2ms TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:23:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-03-11 00:23:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-03-11 00:23:11,581 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) [2021-03-11 00:23:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-03-11 00:23:11,583 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-03-11 00:23:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:11,583 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-03-11 00:23:11,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:23:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-03-11 00:23:11,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:11,585 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:11,585 INFO L519 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] [2021-03-11 00:23:11,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:11,785 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:11,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:11,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-03-11 00:23:11,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:11,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731521551] [2021-03-11 00:23:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:12,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731521551] [2021-03-11 00:23:12,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099220379] [2021-03-11 00:23:12,109 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 [2021-03-11 00:23:12,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:23:12,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:12,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:23:12,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:12,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:12,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:12,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:12,272 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 [2021-03-11 00:23:12,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:12,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:12,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:12,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:23:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:12,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:12,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:23:12,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486336673] [2021-03-11 00:23:12,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:12,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:12,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:12,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:12,298 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) [2021-03-11 00:23:14,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:14,269 INFO L93 Difference]: Finished difference Result 1658 states and 5345 transitions. [2021-03-11 00:23:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:23:14,269 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 [2021-03-11 00:23:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:14,271 INFO L225 Difference]: With dead ends: 1658 [2021-03-11 00:23:14,271 INFO L226 Difference]: Without dead ends: 1643 [2021-03-11 00:23:14,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1855.2ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:23:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-03-11 00:23:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1180. [2021-03-11 00:23:14,284 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) [2021-03-11 00:23:14,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-03-11 00:23:14,286 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-03-11 00:23:14,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:14,287 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-03-11 00:23:14,287 INFO L481 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) [2021-03-11 00:23:14,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-03-11 00:23:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:14,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:14,288 INFO L519 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] [2021-03-11 00:23:14,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-11 00:23:14,489 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:14,489 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-03-11 00:23:14,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:14,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380607506] [2021-03-11 00:23:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:14,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380607506] [2021-03-11 00:23:14,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509751858] [2021-03-11 00:23:14,709 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 [2021-03-11 00:23:14,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:23:14,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:14,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:14,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:14,876 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-03-11 00:23:14,876 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 [2021-03-11 00:23:14,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:14,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:14,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:14,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:22 [2021-03-11 00:23:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:14,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:14,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:23:14,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784682333] [2021-03-11 00:23:14,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:14,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:14,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:14,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:14,926 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 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) [2021-03-11 00:23:16,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:16,442 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-03-11 00:23:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:23:16,442 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 [2021-03-11 00:23:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:16,445 INFO L225 Difference]: With dead ends: 1843 [2021-03-11 00:23:16,445 INFO L226 Difference]: Without dead ends: 1828 [2021-03-11 00:23:16,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1240.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:23:16,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-03-11 00:23:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-03-11 00:23:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-03-11 00:23:16,462 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-03-11 00:23:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:16,462 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-03-11 00:23:16,463 INFO L481 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) [2021-03-11 00:23:16,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-03-11 00:23:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:16,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:16,464 INFO L519 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] [2021-03-11 00:23:16,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:16,665 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:16,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:16,665 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-03-11 00:23:16,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:16,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763589724] [2021-03-11 00:23:16,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:16,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763589724] [2021-03-11 00:23:16,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479552877] [2021-03-11 00:23:16,943 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 [2021-03-11 00:23:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:16,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:16,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:17,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:17,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:17,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:17,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:17,108 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 [2021-03-11 00:23:17,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:17,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:17,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:17,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:23:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:17,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:17,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:23:17,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878945727] [2021-03-11 00:23:17,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:23:17,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:17,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:23:17,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:23:17,133 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 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) [2021-03-11 00:23:19,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:19,112 INFO L93 Difference]: Finished difference Result 1877 states and 5988 transitions. [2021-03-11 00:23:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:23:19,113 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 [2021-03-11 00:23:19,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:19,115 INFO L225 Difference]: With dead ends: 1877 [2021-03-11 00:23:19,115 INFO L226 Difference]: Without dead ends: 1862 [2021-03-11 00:23:19,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1858.0ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:23:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-03-11 00:23:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-03-11 00:23:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:19,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-03-11 00:23:19,131 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-03-11 00:23:19,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:19,131 INFO L480 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-03-11 00:23:19,131 INFO L481 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) [2021-03-11 00:23:19,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-03-11 00:23:19,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:19,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:19,133 INFO L519 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] [2021-03-11 00:23:19,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-11 00:23:19,334 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:19,334 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-03-11 00:23:19,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:19,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541058007] [2021-03-11 00:23:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:19,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541058007] [2021-03-11 00:23:19,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51925877] [2021-03-11 00:23:19,582 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 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 [2021-03-11 00:23:19,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:23:19,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:19,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:19,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:19,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:19,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:19,805 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 [2021-03-11 00:23:19,825 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:23:19,845 INFO L628 ElimStorePlain]: treesize reduction 19, result has 57.8 percent of original size [2021-03-11 00:23:19,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:19,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:38 [2021-03-11 00:23:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:19,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:19,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-11 00:23:19,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506330100] [2021-03-11 00:23:19,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:23:19,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:19,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:23:19,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:23:19,917 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 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) [2021-03-11 00:23:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:21,398 INFO L93 Difference]: Finished difference Result 2109 states and 6703 transitions. [2021-03-11 00:23:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:23:21,399 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 [2021-03-11 00:23:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:21,401 INFO L225 Difference]: With dead ends: 2109 [2021-03-11 00:23:21,401 INFO L226 Difference]: Without dead ends: 2094 [2021-03-11 00:23:21,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1348.3ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:23:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-03-11 00:23:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 1219. [2021-03-11 00:23:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-03-11 00:23:21,419 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-03-11 00:23:21,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:21,419 INFO L480 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-03-11 00:23:21,419 INFO L481 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) [2021-03-11 00:23:21,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-03-11 00:23:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:21,421 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:21,421 INFO L519 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] [2021-03-11 00:23:21,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-03-11 00:23:21,621 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:21,622 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-03-11 00:23:21,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:21,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729477644] [2021-03-11 00:23:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:21,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729477644] [2021-03-11 00:23:21,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52552354] [2021-03-11 00:23:21,814 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 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 [2021-03-11 00:23:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:21,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:21,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:22,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:22,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:22,007 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 [2021-03-11 00:23:22,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:22,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:22,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:22,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:23:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:22,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:22,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:23:22,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057823818] [2021-03-11 00:23:22,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:23:22,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:22,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:23:22,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:23:22,037 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 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) [2021-03-11 00:23:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:22,623 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-03-11 00:23:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:23:22,623 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 [2021-03-11 00:23:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:22,625 INFO L225 Difference]: With dead ends: 1622 [2021-03-11 00:23:22,625 INFO L226 Difference]: Without dead ends: 1607 [2021-03-11 00:23:22,626 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 618.3ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:23:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-03-11 00:23:22,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-03-11 00:23:22,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-03-11 00:23:22,647 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-03-11 00:23:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:22,647 INFO L480 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-03-11 00:23:22,647 INFO L481 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) [2021-03-11 00:23:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-03-11 00:23:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:22,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:22,649 INFO L519 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] [2021-03-11 00:23:22,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-11 00:23:22,863 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:22,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:22,864 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-03-11 00:23:22,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:22,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599237901] [2021-03-11 00:23:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:23,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599237901] [2021-03-11 00:23:23,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486321292] [2021-03-11 00:23:23,072 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 [2021-03-11 00:23:23,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:23:23,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:23,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:23:23,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:23,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:23,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:23,260 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 35 treesize of output 41 [2021-03-11 00:23:23,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:23,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:23,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:23,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:35 [2021-03-11 00:23:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:23,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:23,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:23:23,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995320062] [2021-03-11 00:23:23,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:23:23,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:23,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:23:23,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:23:23,366 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 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) [2021-03-11 00:23:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:25,071 INFO L93 Difference]: Finished difference Result 1847 states and 5891 transitions. [2021-03-11 00:23:25,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:23:25,071 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 [2021-03-11 00:23:25,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:25,074 INFO L225 Difference]: With dead ends: 1847 [2021-03-11 00:23:25,074 INFO L226 Difference]: Without dead ends: 1832 [2021-03-11 00:23:25,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1332.3ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:23:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-03-11 00:23:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1241. [2021-03-11 00:23:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.356451612903226) internal successors, (4162), 1240 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4162 transitions. [2021-03-11 00:23:25,091 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4162 transitions. Word has length 26 [2021-03-11 00:23:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:25,091 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 4162 transitions. [2021-03-11 00:23:25,091 INFO L481 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) [2021-03-11 00:23:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4162 transitions. [2021-03-11 00:23:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:25,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:25,093 INFO L519 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] [2021-03-11 00:23:25,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-11 00:23:25,294 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:25,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-03-11 00:23:25,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:25,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332576550] [2021-03-11 00:23:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:25,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332576550] [2021-03-11 00:23:25,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20943572] [2021-03-11 00:23:25,452 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 [2021-03-11 00:23:25,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:23:25,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:25,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:25,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:25,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:25,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:25,636 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 [2021-03-11 00:23:25,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:25,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:25,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:25,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:23:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:25,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:25,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:23:25,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657762345] [2021-03-11 00:23:25,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:23:25,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:25,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:23:25,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:23:25,674 INFO L87 Difference]: Start difference. First operand 1241 states and 4162 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) [2021-03-11 00:23:26,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:26,475 INFO L93 Difference]: Finished difference Result 1876 states and 6095 transitions. [2021-03-11 00:23:26,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:23:26,475 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 [2021-03-11 00:23:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:26,478 INFO L225 Difference]: With dead ends: 1876 [2021-03-11 00:23:26,478 INFO L226 Difference]: Without dead ends: 1861 [2021-03-11 00:23:26,478 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 731.7ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:23:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-03-11 00:23:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1250. [2021-03-11 00:23:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.3610888710968774) internal successors, (4198), 1249 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4198 transitions. [2021-03-11 00:23:26,495 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4198 transitions. Word has length 26 [2021-03-11 00:23:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:26,495 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 4198 transitions. [2021-03-11 00:23:26,495 INFO L481 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) [2021-03-11 00:23:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4198 transitions. [2021-03-11 00:23:26,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:26,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:26,497 INFO L519 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] [2021-03-11 00:23:26,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:26,698 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:26,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:26,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-03-11 00:23:26,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:26,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497581907] [2021-03-11 00:23:26,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:26,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497581907] [2021-03-11 00:23:26,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814463104] [2021-03-11 00:23:26,869 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 [2021-03-11 00:23:26,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:26,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:26,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:23:26,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:27,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:27,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:27,027 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 [2021-03-11 00:23:27,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:27,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:27,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:27,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:23:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:27,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:27,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:23:27,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490723077] [2021-03-11 00:23:27,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:23:27,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:27,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:23:27,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:23:27,055 INFO L87 Difference]: Start difference. First operand 1250 states and 4198 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) [2021-03-11 00:23:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:27,446 INFO L93 Difference]: Finished difference Result 1393 states and 4580 transitions. [2021-03-11 00:23:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:23:27,446 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 [2021-03-11 00:23:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:27,448 INFO L225 Difference]: With dead ends: 1393 [2021-03-11 00:23:27,448 INFO L226 Difference]: Without dead ends: 1378 [2021-03-11 00:23:27,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 369.6ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:23:27,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-03-11 00:23:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1246. [2021-03-11 00:23:27,460 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) [2021-03-11 00:23:27,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-03-11 00:23:27,462 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-03-11 00:23:27,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:27,462 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-03-11 00:23:27,462 INFO L481 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) [2021-03-11 00:23:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-03-11 00:23:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:27,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:27,464 INFO L519 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] [2021-03-11 00:23:27,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:27,664 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-03-11 00:23:27,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:27,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996508501] [2021-03-11 00:23:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:27,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996508501] [2021-03-11 00:23:27,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120799961] [2021-03-11 00:23:27,833 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:23:27,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:23:27,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:27,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:23:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:28,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:28,047 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-03-11 00:23:28,047 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 76 treesize of output 59 [2021-03-11 00:23:28,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:28,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:28,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:28,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:21 [2021-03-11 00:23:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:28,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:28,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:23:28,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386924223] [2021-03-11 00:23:28,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:23:28,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:28,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:23:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:23:28,117 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 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) [2021-03-11 00:23:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:29,581 INFO L93 Difference]: Finished difference Result 2076 states and 6735 transitions. [2021-03-11 00:23:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:23:29,581 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 [2021-03-11 00:23:29,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:29,584 INFO L225 Difference]: With dead ends: 2076 [2021-03-11 00:23:29,585 INFO L226 Difference]: Without dead ends: 2061 [2021-03-11 00:23:29,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1159.3ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:23:29,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-03-11 00:23:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1246. [2021-03-11 00:23:29,601 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) [2021-03-11 00:23:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-03-11 00:23:29,603 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-03-11 00:23:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:29,603 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-03-11 00:23:29,603 INFO L481 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) [2021-03-11 00:23:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-03-11 00:23:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:29,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:29,606 INFO L519 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] [2021-03-11 00:23:29,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-11 00:23:29,806 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-03-11 00:23:29,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:29,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196298361] [2021-03-11 00:23:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:30,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196298361] [2021-03-11 00:23:30,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185428824] [2021-03-11 00:23:30,001 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 [2021-03-11 00:23:30,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:23:30,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:30,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:23:30,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:30,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:30,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:30,172 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 [2021-03-11 00:23:30,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:23:30,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:30,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:30,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-03-11 00:23:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:30,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:30,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:23:30,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503461852] [2021-03-11 00:23:30,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:30,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:30,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:30,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:30,226 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 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) [2021-03-11 00:23:31,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:31,667 INFO L93 Difference]: Finished difference Result 1890 states and 6145 transitions. [2021-03-11 00:23:31,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:23:31,668 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 [2021-03-11 00:23:31,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:31,670 INFO L225 Difference]: With dead ends: 1890 [2021-03-11 00:23:31,670 INFO L226 Difference]: Without dead ends: 1875 [2021-03-11 00:23:31,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1250.4ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:23:31,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-03-11 00:23:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1246. [2021-03-11 00:23:31,692 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) [2021-03-11 00:23:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-03-11 00:23:31,694 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-03-11 00:23:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:31,695 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-03-11 00:23:31,695 INFO L481 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) [2021-03-11 00:23:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-03-11 00:23:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:31,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:31,697 INFO L519 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] [2021-03-11 00:23:31,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-11 00:23:31,897 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-03-11 00:23:31,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:31,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877909687] [2021-03-11 00:23:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:32,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877909687] [2021-03-11 00:23:32,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8844118] [2021-03-11 00:23:32,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:23:32,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:23:32,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:32,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:32,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:32,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:32,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:32,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:32,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:32,299 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 [2021-03-11 00:23:32,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:32,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:32,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:32,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:23:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:32,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:32,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:23:32,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257479676] [2021-03-11 00:23:32,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:32,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:32,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:32,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:32,332 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) [2021-03-11 00:23:34,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:34,312 INFO L93 Difference]: Finished difference Result 2938 states and 9138 transitions. [2021-03-11 00:23:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:23:34,313 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 [2021-03-11 00:23:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:34,317 INFO L225 Difference]: With dead ends: 2938 [2021-03-11 00:23:34,317 INFO L226 Difference]: Without dead ends: 2893 [2021-03-11 00:23:34,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1792.3ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:23:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-03-11 00:23:34,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1292. [2021-03-11 00:23:34,337 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) [2021-03-11 00:23:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-03-11 00:23:34,339 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-03-11 00:23:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:34,340 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-03-11 00:23:34,340 INFO L481 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) [2021-03-11 00:23:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-03-11 00:23:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:34,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:34,341 INFO L519 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] [2021-03-11 00:23:34,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:34,555 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:34,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-03-11 00:23:34,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:34,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762064738] [2021-03-11 00:23:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:34,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762064738] [2021-03-11 00:23:34,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277649394] [2021-03-11 00:23:34,782 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 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 [2021-03-11 00:23:34,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:34,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:34,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:23:34,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:34,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:34,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:34,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:34,950 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 [2021-03-11 00:23:34,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:34,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:34,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:34,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:23:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:34,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:34,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:23:34,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835077739] [2021-03-11 00:23:34,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:34,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:34,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:34,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:34,979 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 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) [2021-03-11 00:23:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:36,844 INFO L93 Difference]: Finished difference Result 2772 states and 8760 transitions. [2021-03-11 00:23:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:23:36,845 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 [2021-03-11 00:23:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:36,849 INFO L225 Difference]: With dead ends: 2772 [2021-03-11 00:23:36,849 INFO L226 Difference]: Without dead ends: 2727 [2021-03-11 00:23:36,849 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1618.5ms TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:23:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-03-11 00:23:36,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 1288. [2021-03-11 00:23:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3846153846153846) internal successors, (4356), 1287 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4356 transitions. [2021-03-11 00:23:36,870 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4356 transitions. Word has length 26 [2021-03-11 00:23:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:36,870 INFO L480 AbstractCegarLoop]: Abstraction has 1288 states and 4356 transitions. [2021-03-11 00:23:36,870 INFO L481 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) [2021-03-11 00:23:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4356 transitions. [2021-03-11 00:23:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:36,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:36,872 INFO L519 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] [2021-03-11 00:23:37,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:37,072 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-03-11 00:23:37,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:37,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561884750] [2021-03-11 00:23:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:37,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561884750] [2021-03-11 00:23:37,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098238167] [2021-03-11 00:23:37,302 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 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 [2021-03-11 00:23:37,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:23:37,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:37,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:37,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:37,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:37,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:37,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:37,438 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 [2021-03-11 00:23:37,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:23:37,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:37,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:37,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-03-11 00:23:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:37,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:37,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:23:37,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983442296] [2021-03-11 00:23:37,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:37,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:37,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:37,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:37,500 INFO L87 Difference]: Start difference. First operand 1288 states and 4356 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) [2021-03-11 00:23:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:39,953 INFO L93 Difference]: Finished difference Result 3091 states and 9690 transitions. [2021-03-11 00:23:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:23:39,953 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 [2021-03-11 00:23:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:39,959 INFO L225 Difference]: With dead ends: 3091 [2021-03-11 00:23:39,959 INFO L226 Difference]: Without dead ends: 3046 [2021-03-11 00:23:39,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2075.6ms TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:23:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2021-03-11 00:23:39,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 1292. [2021-03-11 00:23:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3903950426026337) internal successors, (4377), 1291 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:39,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4377 transitions. [2021-03-11 00:23:39,981 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4377 transitions. Word has length 26 [2021-03-11 00:23:39,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:39,982 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4377 transitions. [2021-03-11 00:23:39,982 INFO L481 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) [2021-03-11 00:23:39,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4377 transitions. [2021-03-11 00:23:39,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:39,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:39,984 INFO L519 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] [2021-03-11 00:23:40,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-03-11 00:23:40,184 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:40,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-03-11 00:23:40,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:40,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970412280] [2021-03-11 00:23:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:40,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970412280] [2021-03-11 00:23:40,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813473309] [2021-03-11 00:23:40,379 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 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 [2021-03-11 00:23:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:40,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:40,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:40,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:40,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:40,557 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 [2021-03-11 00:23:40,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:40,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:40,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:40,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:23:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:40,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:40,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:23:40,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641635576] [2021-03-11 00:23:40,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:23:40,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:40,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:23:40,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:23:40,580 INFO L87 Difference]: Start difference. First operand 1292 states and 4377 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) [2021-03-11 00:23:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:41,043 INFO L93 Difference]: Finished difference Result 1654 states and 5477 transitions. [2021-03-11 00:23:41,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:23:41,043 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 [2021-03-11 00:23:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:41,046 INFO L225 Difference]: With dead ends: 1654 [2021-03-11 00:23:41,046 INFO L226 Difference]: Without dead ends: 1639 [2021-03-11 00:23:41,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:23:41,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-03-11 00:23:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1309. [2021-03-11 00:23:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.385321100917431) internal successors, (4428), 1308 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4428 transitions. [2021-03-11 00:23:41,061 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4428 transitions. Word has length 26 [2021-03-11 00:23:41,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:41,062 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 4428 transitions. [2021-03-11 00:23:41,062 INFO L481 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) [2021-03-11 00:23:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4428 transitions. [2021-03-11 00:23:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:41,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:41,063 INFO L519 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] [2021-03-11 00:23:41,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-11 00:23:41,264 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:41,264 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-03-11 00:23:41,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:41,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52736054] [2021-03-11 00:23:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:41,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52736054] [2021-03-11 00:23:41,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767467965] [2021-03-11 00:23:41,476 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:23:41,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:23:41,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:23:41,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:41,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:41,673 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 [2021-03-11 00:23:41,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:41,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:41,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:41,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:91 [2021-03-11 00:23:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:41,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:41,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:23:41,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094954289] [2021-03-11 00:23:41,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:23:41,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:41,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:23:41,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:23:41,813 INFO L87 Difference]: Start difference. First operand 1309 states and 4428 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) [2021-03-11 00:23:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:43,329 INFO L93 Difference]: Finished difference Result 1924 states and 6179 transitions. [2021-03-11 00:23:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:23:43,330 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 [2021-03-11 00:23:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:43,332 INFO L225 Difference]: With dead ends: 1924 [2021-03-11 00:23:43,332 INFO L226 Difference]: Without dead ends: 1894 [2021-03-11 00:23:43,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1326.1ms TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:23:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-03-11 00:23:43,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1297. [2021-03-11 00:23:43,347 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) [2021-03-11 00:23:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-03-11 00:23:43,349 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-03-11 00:23:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:43,350 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-03-11 00:23:43,350 INFO L481 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) [2021-03-11 00:23:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-03-11 00:23:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:43,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:43,352 INFO L519 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] [2021-03-11 00:23:43,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:43,553 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:43,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1553655630, now seen corresponding path program 15 times [2021-03-11 00:23:43,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:43,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435213327] [2021-03-11 00:23:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:43,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435213327] [2021-03-11 00:23:43,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913779471] [2021-03-11 00:23:43,752 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 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 [2021-03-11 00:23:43,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:23:43,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:43,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-11 00:23:43,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:43,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:43,949 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 [2021-03-11 00:23:43,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:43,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:43,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:43,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:77 [2021-03-11 00:23:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:44,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:44,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-03-11 00:23:44,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299071548] [2021-03-11 00:23:44,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:44,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:44,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:44,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:44,029 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 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) [2021-03-11 00:23:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:45,355 INFO L93 Difference]: Finished difference Result 2000 states and 6503 transitions. [2021-03-11 00:23:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:23:45,356 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 [2021-03-11 00:23:45,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:45,358 INFO L225 Difference]: With dead ends: 2000 [2021-03-11 00:23:45,358 INFO L226 Difference]: Without dead ends: 1985 [2021-03-11 00:23:45,358 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1112.1ms TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:23:45,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-03-11 00:23:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1306. [2021-03-11 00:23:45,374 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) [2021-03-11 00:23:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-03-11 00:23:45,376 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-03-11 00:23:45,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:45,377 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-03-11 00:23:45,377 INFO L481 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) [2021-03-11 00:23:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-03-11 00:23:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:45,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:45,378 INFO L519 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] [2021-03-11 00:23:45,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:45,593 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:45,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 16 times [2021-03-11 00:23:45,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:45,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173345937] [2021-03-11 00:23:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:45,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173345937] [2021-03-11 00:23:45,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627188979] [2021-03-11 00:23:45,823 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 [2021-03-11 00:23:45,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:45,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:45,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:23:45,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:45,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:45,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:45,986 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 [2021-03-11 00:23:45,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:45,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:45,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:45,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:23:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:46,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:46,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:23:46,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838699539] [2021-03-11 00:23:46,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:23:46,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:46,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:23:46,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:23:46,014 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) [2021-03-11 00:23:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:46,282 INFO L93 Difference]: Finished difference Result 1441 states and 4791 transitions. [2021-03-11 00:23:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:23:46,282 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 [2021-03-11 00:23:46,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:46,285 INFO L225 Difference]: With dead ends: 1441 [2021-03-11 00:23:46,285 INFO L226 Difference]: Without dead ends: 1426 [2021-03-11 00:23:46,285 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:23:46,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-03-11 00:23:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1309. [2021-03-11 00:23:46,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3929663608562692) internal successors, (4438), 1308 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4438 transitions. [2021-03-11 00:23:46,300 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4438 transitions. Word has length 26 [2021-03-11 00:23:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:46,300 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 4438 transitions. [2021-03-11 00:23:46,300 INFO L481 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) [2021-03-11 00:23:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4438 transitions. [2021-03-11 00:23:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:46,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:46,302 INFO L519 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] [2021-03-11 00:23:46,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:46,517 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:46,518 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 17 times [2021-03-11 00:23:46,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:46,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760856363] [2021-03-11 00:23:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:46,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760856363] [2021-03-11 00:23:46,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898050054] [2021-03-11 00:23:46,715 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 [2021-03-11 00:23:46,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:23:46,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:46,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:23:46,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:46,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:46,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:46,897 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 [2021-03-11 00:23:46,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:23:46,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:46,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:46,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-03-11 00:23:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:46,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:46,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:23:46,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138716299] [2021-03-11 00:23:46,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:23:46,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:46,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:23:46,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:23:46,957 INFO L87 Difference]: Start difference. First operand 1309 states and 4438 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) [2021-03-11 00:23:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:48,335 INFO L93 Difference]: Finished difference Result 2201 states and 7163 transitions. [2021-03-11 00:23:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:23:48,336 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 [2021-03-11 00:23:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:48,339 INFO L225 Difference]: With dead ends: 2201 [2021-03-11 00:23:48,339 INFO L226 Difference]: Without dead ends: 2171 [2021-03-11 00:23:48,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1141.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:23:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-03-11 00:23:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1306. [2021-03-11 00:23:48,361 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) [2021-03-11 00:23:48,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-03-11 00:23:48,363 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-03-11 00:23:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:48,363 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-03-11 00:23:48,363 INFO L481 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) [2021-03-11 00:23:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-03-11 00:23:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:48,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:48,365 INFO L519 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] [2021-03-11 00:23:48,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-03-11 00:23:48,566 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:48,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 18 times [2021-03-11 00:23:48,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:48,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088147804] [2021-03-11 00:23:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:48,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088147804] [2021-03-11 00:23:48,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236945638] [2021-03-11 00:23:48,768 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 [2021-03-11 00:23:48,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:23:48,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:48,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:48,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:48,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:48,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:48,925 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 [2021-03-11 00:23:48,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:23:48,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:48,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:48,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-03-11 00:23:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:48,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:48,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:23:48,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785173072] [2021-03-11 00:23:48,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:48,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:48,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:48,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:48,973 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 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) [2021-03-11 00:23:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:50,032 INFO L93 Difference]: Finished difference Result 1909 states and 6282 transitions. [2021-03-11 00:23:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:23:50,033 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 [2021-03-11 00:23:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:50,035 INFO L225 Difference]: With dead ends: 1909 [2021-03-11 00:23:50,035 INFO L226 Difference]: Without dead ends: 1894 [2021-03-11 00:23:50,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 970.2ms TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:23:50,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-03-11 00:23:50,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1303. [2021-03-11 00:23:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.387864823348694) internal successors, (4411), 1302 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4411 transitions. [2021-03-11 00:23:50,054 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4411 transitions. Word has length 26 [2021-03-11 00:23:50,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:50,054 INFO L480 AbstractCegarLoop]: Abstraction has 1303 states and 4411 transitions. [2021-03-11 00:23:50,054 INFO L481 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) [2021-03-11 00:23:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4411 transitions. [2021-03-11 00:23:50,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:50,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:50,056 INFO L519 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] [2021-03-11 00:23:50,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:50,257 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:50,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-03-11 00:23:50,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:50,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067235217] [2021-03-11 00:23:50,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:50,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067235217] [2021-03-11 00:23:50,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132302300] [2021-03-11 00:23:50,463 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 [2021-03-11 00:23:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:50,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:50,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:50,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:50,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:50,650 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 [2021-03-11 00:23:50,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:50,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:50,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:50,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:23:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:50,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:50,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:23:50,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206454153] [2021-03-11 00:23:50,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:23:50,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:50,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:23:50,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:23:50,672 INFO L87 Difference]: Start difference. First operand 1303 states and 4411 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) [2021-03-11 00:23:51,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:51,177 INFO L93 Difference]: Finished difference Result 1736 states and 5716 transitions. [2021-03-11 00:23:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:23:51,178 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 [2021-03-11 00:23:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:51,180 INFO L225 Difference]: With dead ends: 1736 [2021-03-11 00:23:51,180 INFO L226 Difference]: Without dead ends: 1715 [2021-03-11 00:23:51,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 547.0ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:23:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-03-11 00:23:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1344. [2021-03-11 00:23:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3827252419955323) internal successors, (4543), 1343 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4543 transitions. [2021-03-11 00:23:51,197 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4543 transitions. Word has length 26 [2021-03-11 00:23:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:51,197 INFO L480 AbstractCegarLoop]: Abstraction has 1344 states and 4543 transitions. [2021-03-11 00:23:51,198 INFO L481 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) [2021-03-11 00:23:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4543 transitions. [2021-03-11 00:23:51,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:51,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:51,200 INFO L519 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] [2021-03-11 00:23:51,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-03-11 00:23:51,414 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:51,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:51,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-03-11 00:23:51,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:51,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836049938] [2021-03-11 00:23:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:51,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836049938] [2021-03-11 00:23:51,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537802538] [2021-03-11 00:23:51,682 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) [2021-03-11 00:23:51,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:23:51,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:51,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-11 00:23:51,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:51,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:51,902 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 [2021-03-11 00:23:51,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:51,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:51,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:51,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:89 [2021-03-11 00:23:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:52,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:52,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-11 00:23:52,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764548943] [2021-03-11 00:23:52,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:23:52,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:52,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:23:52,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:23:52,049 INFO L87 Difference]: Start difference. First operand 1344 states and 4543 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) [2021-03-11 00:23:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:53,256 INFO L93 Difference]: Finished difference Result 1754 states and 5590 transitions. [2021-03-11 00:23:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:23:53,256 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 [2021-03-11 00:23:53,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:53,259 INFO L225 Difference]: With dead ends: 1754 [2021-03-11 00:23:53,259 INFO L226 Difference]: Without dead ends: 1729 [2021-03-11 00:23:53,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1137.7ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:23:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-03-11 00:23:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1358. [2021-03-11 00:23:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3920412675018423) internal successors, (4603), 1357 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4603 transitions. [2021-03-11 00:23:53,276 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4603 transitions. Word has length 26 [2021-03-11 00:23:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:53,276 INFO L480 AbstractCegarLoop]: Abstraction has 1358 states and 4603 transitions. [2021-03-11 00:23:53,276 INFO L481 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) [2021-03-11 00:23:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4603 transitions. [2021-03-11 00:23:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:53,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:53,278 INFO L519 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] [2021-03-11 00:23:53,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:53,479 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:53,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-03-11 00:23:53,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:53,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573482224] [2021-03-11 00:23:53,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:53,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573482224] [2021-03-11 00:23:53,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544583838] [2021-03-11 00:23:53,721 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 [2021-03-11 00:23:53,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:23:53,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:53,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:23:53,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:53,915 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-03-11 00:23:53,915 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 [2021-03-11 00:23:53,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:53,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:53,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:53,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-03-11 00:23:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:53,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:53,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-11 00:23:53,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167973435] [2021-03-11 00:23:53,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:53,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:53,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:53,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:53,975 INFO L87 Difference]: Start difference. First operand 1358 states and 4603 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) [2021-03-11 00:23:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:54,779 INFO L93 Difference]: Finished difference Result 1743 states and 5751 transitions. [2021-03-11 00:23:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:23:54,780 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 [2021-03-11 00:23:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:54,782 INFO L225 Difference]: With dead ends: 1743 [2021-03-11 00:23:54,782 INFO L226 Difference]: Without dead ends: 1714 [2021-03-11 00:23:54,783 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 813.4ms TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:23:54,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-03-11 00:23:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1361. [2021-03-11 00:23:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.3926470588235293) internal successors, (4614), 1360 states have internal predecessors, (4614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:54,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4614 transitions. [2021-03-11 00:23:54,799 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4614 transitions. Word has length 26 [2021-03-11 00:23:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:54,799 INFO L480 AbstractCegarLoop]: Abstraction has 1361 states and 4614 transitions. [2021-03-11 00:23:54,800 INFO L481 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) [2021-03-11 00:23:54,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4614 transitions. [2021-03-11 00:23:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:54,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:54,802 INFO L519 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] [2021-03-11 00:23:55,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-11 00:23:55,002 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:55,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:55,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-03-11 00:23:55,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:55,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818273560] [2021-03-11 00:23:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:55,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818273560] [2021-03-11 00:23:55,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367714037] [2021-03-11 00:23:55,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:23:55,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:55,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:55,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:23:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:55,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:55,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:23:55,423 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 [2021-03-11 00:23:55,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:55,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:55,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:55,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:23:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:55,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:55,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:23:55,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907775657] [2021-03-11 00:23:55,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:23:55,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:55,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:23:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:23:55,451 INFO L87 Difference]: Start difference. First operand 1361 states and 4614 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) [2021-03-11 00:23:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:55,781 INFO L93 Difference]: Finished difference Result 1474 states and 4920 transitions. [2021-03-11 00:23:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:23:55,782 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 [2021-03-11 00:23:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:55,784 INFO L225 Difference]: With dead ends: 1474 [2021-03-11 00:23:55,784 INFO L226 Difference]: Without dead ends: 1459 [2021-03-11 00:23:55,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 397.8ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:23:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-03-11 00:23:55,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1367. [2021-03-11 00:23:55,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.394582723279649) internal successors, (4637), 1366 states have internal predecessors, (4637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4637 transitions. [2021-03-11 00:23:55,799 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4637 transitions. Word has length 26 [2021-03-11 00:23:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:55,799 INFO L480 AbstractCegarLoop]: Abstraction has 1367 states and 4637 transitions. [2021-03-11 00:23:55,799 INFO L481 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) [2021-03-11 00:23:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4637 transitions. [2021-03-11 00:23:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:55,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:55,801 INFO L519 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] [2021-03-11 00:23:56,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:56,015 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:56,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:56,015 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-03-11 00:23:56,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:56,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571672729] [2021-03-11 00:23:56,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:56,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571672729] [2021-03-11 00:23:56,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380330156] [2021-03-11 00:23:56,250 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 [2021-03-11 00:23:56,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:23:56,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:56,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:23:56,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:56,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:56,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:56,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:23:56,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:23:56,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:56,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:56,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-03-11 00:23:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:56,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:56,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:23:56,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356188484] [2021-03-11 00:23:56,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:23:56,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:56,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:23:56,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:23:56,513 INFO L87 Difference]: Start difference. First operand 1367 states and 4637 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) [2021-03-11 00:23:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:57,094 INFO L93 Difference]: Finished difference Result 1826 states and 6031 transitions. [2021-03-11 00:23:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:23:57,094 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 [2021-03-11 00:23:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:57,097 INFO L225 Difference]: With dead ends: 1826 [2021-03-11 00:23:57,097 INFO L226 Difference]: Without dead ends: 1801 [2021-03-11 00:23:57,097 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 685.7ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:23:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-03-11 00:23:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1374. [2021-03-11 00:23:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.3991260014566644) internal successors, (4667), 1373 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4667 transitions. [2021-03-11 00:23:57,114 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4667 transitions. Word has length 26 [2021-03-11 00:23:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:57,114 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4667 transitions. [2021-03-11 00:23:57,115 INFO L481 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) [2021-03-11 00:23:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4667 transitions. [2021-03-11 00:23:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:57,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:57,116 INFO L519 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] [2021-03-11 00:23:57,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-11 00:23:57,319 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:57,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-03-11 00:23:57,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:57,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96487101] [2021-03-11 00:23:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:57,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96487101] [2021-03-11 00:23:57,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182347372] [2021-03-11 00:23:57,535 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 [2021-03-11 00:23:57,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:23:57,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:57,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:57,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:57,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:57,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:57,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:57,720 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 [2021-03-11 00:23:57,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:23:57,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:57,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:57,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-03-11 00:23:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:57,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:57,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:23:57,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641866529] [2021-03-11 00:23:57,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:23:57,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:57,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:23:57,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:23:57,774 INFO L87 Difference]: Start difference. First operand 1374 states and 4667 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) [2021-03-11 00:23:58,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:58,544 INFO L93 Difference]: Finished difference Result 1851 states and 6138 transitions. [2021-03-11 00:23:58,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:23:58,544 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 [2021-03-11 00:23:58,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:58,547 INFO L225 Difference]: With dead ends: 1851 [2021-03-11 00:23:58,547 INFO L226 Difference]: Without dead ends: 1832 [2021-03-11 00:23:58,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 784.7ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:23:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-03-11 00:23:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1386. [2021-03-11 00:23:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4021660649819494) internal successors, (4712), 1385 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4712 transitions. [2021-03-11 00:23:58,566 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4712 transitions. Word has length 26 [2021-03-11 00:23:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:58,566 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4712 transitions. [2021-03-11 00:23:58,566 INFO L481 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) [2021-03-11 00:23:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4712 transitions. [2021-03-11 00:23:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:58,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:58,568 INFO L519 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] [2021-03-11 00:23:58,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-03-11 00:23:58,783 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:58,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:58,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 25 times [2021-03-11 00:23:58,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:58,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465710481] [2021-03-11 00:23:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:58,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465710481] [2021-03-11 00:23:58,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753291260] [2021-03-11 00:23:58,981 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 [2021-03-11 00:23:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:59,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:23:59,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:59,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:23:59,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:59,145 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 [2021-03-11 00:23:59,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:23:59,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:59,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:59,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-03-11 00:23:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:59,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:59,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:23:59,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084197419] [2021-03-11 00:23:59,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:23:59,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:59,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:23:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:23:59,209 INFO L87 Difference]: Start difference. First operand 1386 states and 4712 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) [2021-03-11 00:23:59,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:59,680 INFO L93 Difference]: Finished difference Result 1888 states and 6257 transitions. [2021-03-11 00:23:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:23:59,681 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 [2021-03-11 00:23:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:59,684 INFO L225 Difference]: With dead ends: 1888 [2021-03-11 00:23:59,684 INFO L226 Difference]: Without dead ends: 1863 [2021-03-11 00:23:59,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 515.9ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:23:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-03-11 00:23:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1386. [2021-03-11 00:23:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4021660649819494) internal successors, (4712), 1385 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4712 transitions. [2021-03-11 00:23:59,701 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4712 transitions. Word has length 26 [2021-03-11 00:23:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:59,702 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4712 transitions. [2021-03-11 00:23:59,702 INFO L481 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) [2021-03-11 00:23:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4712 transitions. [2021-03-11 00:23:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:23:59,703 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:59,703 INFO L519 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] [2021-03-11 00:23:59,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-11 00:23:59,904 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:59,905 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-03-11 00:23:59,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:59,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226348933] [2021-03-11 00:23:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:00,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226348933] [2021-03-11 00:24:00,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290038098] [2021-03-11 00:24:00,283 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 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 [2021-03-11 00:24:00,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:24:00,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:00,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:24:00,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:00,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:00,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:00,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:00,449 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 [2021-03-11 00:24:00,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:00,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:00,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:00,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:24:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:00,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:00,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:24:00,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115902424] [2021-03-11 00:24:00,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:24:00,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:00,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:24:00,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:00,472 INFO L87 Difference]: Start difference. First operand 1386 states and 4712 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) [2021-03-11 00:24:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:01,588 INFO L93 Difference]: Finished difference Result 1823 states and 6011 transitions. [2021-03-11 00:24:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:24:01,588 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 [2021-03-11 00:24:01,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:01,591 INFO L225 Difference]: With dead ends: 1823 [2021-03-11 00:24:01,591 INFO L226 Difference]: Without dead ends: 1797 [2021-03-11 00:24:01,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1231.2ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:24:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-03-11 00:24:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1398. [2021-03-11 00:24:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.397279885468862) internal successors, (4746), 1397 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4746 transitions. [2021-03-11 00:24:01,608 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4746 transitions. Word has length 26 [2021-03-11 00:24:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:01,608 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4746 transitions. [2021-03-11 00:24:01,608 INFO L481 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) [2021-03-11 00:24:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4746 transitions. [2021-03-11 00:24:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:01,609 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:01,609 INFO L519 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] [2021-03-11 00:24:01,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:01,810 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:01,810 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-03-11 00:24:01,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:01,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423893452] [2021-03-11 00:24:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:02,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423893452] [2021-03-11 00:24:02,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903022352] [2021-03-11 00:24:02,114 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 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 [2021-03-11 00:24:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:02,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:24:02,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:02,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:02,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:02,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:02,287 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 [2021-03-11 00:24:02,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:02,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:02,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:02,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:24:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:02,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:02,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:24:02,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845959498] [2021-03-11 00:24:02,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:24:02,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:02,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:24:02,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:24:02,317 INFO L87 Difference]: Start difference. First operand 1398 states and 4746 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) [2021-03-11 00:24:03,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:03,441 INFO L93 Difference]: Finished difference Result 1968 states and 6512 transitions. [2021-03-11 00:24:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:24:03,442 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 [2021-03-11 00:24:03,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:03,445 INFO L225 Difference]: With dead ends: 1968 [2021-03-11 00:24:03,445 INFO L226 Difference]: Without dead ends: 1953 [2021-03-11 00:24:03,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1130.6ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:24:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-03-11 00:24:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1398. [2021-03-11 00:24:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.397279885468862) internal successors, (4746), 1397 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4746 transitions. [2021-03-11 00:24:03,463 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4746 transitions. Word has length 26 [2021-03-11 00:24:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:03,463 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4746 transitions. [2021-03-11 00:24:03,463 INFO L481 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) [2021-03-11 00:24:03,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4746 transitions. [2021-03-11 00:24:03,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:03,465 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:03,465 INFO L519 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] [2021-03-11 00:24:03,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-11 00:24:03,666 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:03,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:03,666 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 26 times [2021-03-11 00:24:03,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:03,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539912297] [2021-03-11 00:24:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:03,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539912297] [2021-03-11 00:24:03,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967766381] [2021-03-11 00:24:03,921 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 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 [2021-03-11 00:24:03,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:24:03,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:03,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:24:03,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:04,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:04,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:04,083 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 [2021-03-11 00:24:04,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:24:04,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:04,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:04,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-03-11 00:24:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:04,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:04,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:24:04,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110614944] [2021-03-11 00:24:04,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:24:04,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:04,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:24:04,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:04,138 INFO L87 Difference]: Start difference. First operand 1398 states and 4746 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) [2021-03-11 00:24:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:05,409 INFO L93 Difference]: Finished difference Result 2014 states and 6565 transitions. [2021-03-11 00:24:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:24:05,410 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 [2021-03-11 00:24:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:05,412 INFO L225 Difference]: With dead ends: 2014 [2021-03-11 00:24:05,413 INFO L226 Difference]: Without dead ends: 1995 [2021-03-11 00:24:05,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1101.9ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:24:05,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-03-11 00:24:05,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1407. [2021-03-11 00:24:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 3.3975817923186344) internal successors, (4777), 1406 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:05,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4777 transitions. [2021-03-11 00:24:05,431 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4777 transitions. Word has length 26 [2021-03-11 00:24:05,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:05,431 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 4777 transitions. [2021-03-11 00:24:05,431 INFO L481 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) [2021-03-11 00:24:05,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4777 transitions. [2021-03-11 00:24:05,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:05,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:05,433 INFO L519 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] [2021-03-11 00:24:05,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:05,643 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:05,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:05,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-03-11 00:24:05,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:05,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688605870] [2021-03-11 00:24:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:05,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688605870] [2021-03-11 00:24:05,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950097140] [2021-03-11 00:24:05,934 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 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 [2021-03-11 00:24:05,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:24:05,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:05,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:24:05,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:06,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:06,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:06,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:06,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:06,092 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 [2021-03-11 00:24:06,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:06,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:06,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:06,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:24:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:06,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:06,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:24:06,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697247094] [2021-03-11 00:24:06,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:24:06,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:06,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:24:06,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:24:06,115 INFO L87 Difference]: Start difference. First operand 1407 states and 4777 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) [2021-03-11 00:24:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:07,563 INFO L93 Difference]: Finished difference Result 2051 states and 6623 transitions. [2021-03-11 00:24:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:24:07,564 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 [2021-03-11 00:24:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:07,567 INFO L225 Difference]: With dead ends: 2051 [2021-03-11 00:24:07,567 INFO L226 Difference]: Without dead ends: 2029 [2021-03-11 00:24:07,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1369.6ms TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:24:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-03-11 00:24:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1414. [2021-03-11 00:24:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 3.3984430290162773) internal successors, (4802), 1413 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) [2021-03-11 00:24:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4802 transitions. [2021-03-11 00:24:07,586 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4802 transitions. Word has length 26 [2021-03-11 00:24:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:07,586 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 4802 transitions. [2021-03-11 00:24:07,586 INFO L481 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) [2021-03-11 00:24:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4802 transitions. [2021-03-11 00:24:07,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:07,588 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:07,588 INFO L519 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] [2021-03-11 00:24:07,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-03-11 00:24:07,788 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:07,788 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-03-11 00:24:07,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:07,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496872047] [2021-03-11 00:24:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:08,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496872047] [2021-03-11 00:24:08,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750277976] [2021-03-11 00:24:08,015 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 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 [2021-03-11 00:24:08,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:24:08,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:24:08,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:08,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:08,309 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 59 [2021-03-11 00:24:08,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:24:08,654 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 67 [2021-03-11 00:24:08,655 INFO L628 ElimStorePlain]: treesize reduction 196, result has 42.5 percent of original size [2021-03-11 00:24:08,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:08,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:530 [2021-03-11 00:24:09,002 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-03-11 00:24:09,158 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-11 00:24:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:09,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:09,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-03-11 00:24:09,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403366553] [2021-03-11 00:24:09,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:24:09,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:09,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:24:09,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:24:09,191 INFO L87 Difference]: Start difference. First operand 1414 states and 4802 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) [2021-03-11 00:24:12,083 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-03-11 00:24:12,377 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-03-11 00:24:12,569 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-03-11 00:24:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:12,631 INFO L93 Difference]: Finished difference Result 2512 states and 8095 transitions. [2021-03-11 00:24:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:24:12,631 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 [2021-03-11 00:24:12,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:12,635 INFO L225 Difference]: With dead ends: 2512 [2021-03-11 00:24:12,635 INFO L226 Difference]: Without dead ends: 2497 [2021-03-11 00:24:12,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 3148.0ms TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:24:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-03-11 00:24:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1424. [2021-03-11 00:24:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.399156711173577) internal successors, (4837), 1423 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4837 transitions. [2021-03-11 00:24:12,657 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4837 transitions. Word has length 26 [2021-03-11 00:24:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:12,657 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 4837 transitions. [2021-03-11 00:24:12,657 INFO L481 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) [2021-03-11 00:24:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4837 transitions. [2021-03-11 00:24:12,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:12,659 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:12,659 INFO L519 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] [2021-03-11 00:24:12,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:12,860 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:12,860 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-03-11 00:24:12,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:12,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838801960] [2021-03-11 00:24:12,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:13,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838801960] [2021-03-11 00:24:13,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344329737] [2021-03-11 00:24:13,121 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 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 [2021-03-11 00:24:13,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:24:13,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:13,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:24:13,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:13,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:13,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:13,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:13,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:13,311 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 [2021-03-11 00:24:13,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:13,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:13,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:13,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:24:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:13,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:13,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:24:13,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143567994] [2021-03-11 00:24:13,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:24:13,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:13,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:24:13,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:13,342 INFO L87 Difference]: Start difference. First operand 1424 states and 4837 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) [2021-03-11 00:24:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:15,237 INFO L93 Difference]: Finished difference Result 3025 states and 9657 transitions. [2021-03-11 00:24:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:24:15,238 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 [2021-03-11 00:24:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:15,243 INFO L225 Difference]: With dead ends: 3025 [2021-03-11 00:24:15,243 INFO L226 Difference]: Without dead ends: 2989 [2021-03-11 00:24:15,243 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1598.1ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:24:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2021-03-11 00:24:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 1557. [2021-03-11 00:24:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.417095115681234) internal successors, (5317), 1556 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5317 transitions. [2021-03-11 00:24:15,267 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5317 transitions. Word has length 26 [2021-03-11 00:24:15,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:15,267 INFO L480 AbstractCegarLoop]: Abstraction has 1557 states and 5317 transitions. [2021-03-11 00:24:15,267 INFO L481 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) [2021-03-11 00:24:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5317 transitions. [2021-03-11 00:24:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:15,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:15,270 INFO L519 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] [2021-03-11 00:24:15,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-03-11 00:24:15,470 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:15,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:15,470 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-03-11 00:24:15,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:15,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664445337] [2021-03-11 00:24:15,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:15,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664445337] [2021-03-11 00:24:15,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737961020] [2021-03-11 00:24:15,721 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 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 [2021-03-11 00:24:15,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:24:15,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:24:15,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:15,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:15,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:15,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:15,867 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 [2021-03-11 00:24:15,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:24:15,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:15,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:15,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-03-11 00:24:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:15,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:15,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:24:15,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903592236] [2021-03-11 00:24:15,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:24:15,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:15,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:24:15,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:15,943 INFO L87 Difference]: Start difference. First operand 1557 states and 5317 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) [2021-03-11 00:24:18,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:18,242 INFO L93 Difference]: Finished difference Result 3407 states and 10755 transitions. [2021-03-11 00:24:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:24:18,243 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 [2021-03-11 00:24:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:18,248 INFO L225 Difference]: With dead ends: 3407 [2021-03-11 00:24:18,248 INFO L226 Difference]: Without dead ends: 3350 [2021-03-11 00:24:18,248 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 2001.1ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:24:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-03-11 00:24:18,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 1580. [2021-03-11 00:24:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-03-11 00:24:18,277 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-03-11 00:24:18,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:18,277 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-03-11 00:24:18,277 INFO L481 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) [2021-03-11 00:24:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-03-11 00:24:18,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:18,279 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:18,279 INFO L519 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] [2021-03-11 00:24:18,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:18,480 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:18,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 27 times [2021-03-11 00:24:18,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:18,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226609498] [2021-03-11 00:24:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:18,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226609498] [2021-03-11 00:24:18,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161307299] [2021-03-11 00:24:18,682 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 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 [2021-03-11 00:24:18,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:24:18,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:18,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:24:18,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:18,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:18,935 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 [2021-03-11 00:24:18,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:18,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:18,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:24:18,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:182 [2021-03-11 00:24:19,143 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:24:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:19,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:19,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-03-11 00:24:19,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095468883] [2021-03-11 00:24:19,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:24:19,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:19,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:24:19,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:19,176 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 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) [2021-03-11 00:24:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:21,272 INFO L93 Difference]: Finished difference Result 2188 states and 7228 transitions. [2021-03-11 00:24:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:24:21,273 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 [2021-03-11 00:24:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:21,276 INFO L225 Difference]: With dead ends: 2188 [2021-03-11 00:24:21,276 INFO L226 Difference]: Without dead ends: 2158 [2021-03-11 00:24:21,277 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1851.7ms TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:24:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-03-11 00:24:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1591. [2021-03-11 00:24:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.419496855345912) internal successors, (5437), 1590 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5437 transitions. [2021-03-11 00:24:21,298 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5437 transitions. Word has length 26 [2021-03-11 00:24:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:21,298 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5437 transitions. [2021-03-11 00:24:21,298 INFO L481 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) [2021-03-11 00:24:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5437 transitions. [2021-03-11 00:24:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:21,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:21,301 INFO L519 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] [2021-03-11 00:24:21,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-11 00:24:21,501 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:21,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:21,501 INFO L82 PathProgramCache]: Analyzing trace with hash -105433162, now seen corresponding path program 28 times [2021-03-11 00:24:21,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:21,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801957003] [2021-03-11 00:24:21,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:21,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801957003] [2021-03-11 00:24:21,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47174008] [2021-03-11 00:24:21,692 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 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 [2021-03-11 00:24:21,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:24:21,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:21,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:24:21,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:21,853 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-03-11 00:24:21,854 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 [2021-03-11 00:24:21,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:21,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:21,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:21,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:22 [2021-03-11 00:24:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:21,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:21,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:24:21,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569023254] [2021-03-11 00:24:21,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:24:21,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:21,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:24:21,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:21,913 INFO L87 Difference]: Start difference. First operand 1591 states and 5437 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) [2021-03-11 00:24:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:23,358 INFO L93 Difference]: Finished difference Result 2267 states and 7551 transitions. [2021-03-11 00:24:23,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:24:23,359 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 [2021-03-11 00:24:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:23,362 INFO L225 Difference]: With dead ends: 2267 [2021-03-11 00:24:23,362 INFO L226 Difference]: Without dead ends: 2248 [2021-03-11 00:24:23,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1140.7ms TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:24:23,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-03-11 00:24:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1594. [2021-03-11 00:24:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.418706842435656) internal successors, (5446), 1593 states have internal predecessors, (5446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5446 transitions. [2021-03-11 00:24:23,383 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5446 transitions. Word has length 26 [2021-03-11 00:24:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:23,384 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 5446 transitions. [2021-03-11 00:24:23,384 INFO L481 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) [2021-03-11 00:24:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5446 transitions. [2021-03-11 00:24:23,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:23,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:23,386 INFO L519 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] [2021-03-11 00:24:23,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:23,586 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:23,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 29 times [2021-03-11 00:24:23,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:23,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944430220] [2021-03-11 00:24:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:23,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944430220] [2021-03-11 00:24:23,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910869423] [2021-03-11 00:24:23,777 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 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 [2021-03-11 00:24:23,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:24:23,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:23,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:24:23,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:23,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:23,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:23,952 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 [2021-03-11 00:24:23,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:24:23,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:23,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:23,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-03-11 00:24:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:24,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:24,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:24:24,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062874736] [2021-03-11 00:24:24,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:24:24,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:24,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:24:24,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:24,018 INFO L87 Difference]: Start difference. First operand 1594 states and 5446 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) [2021-03-11 00:24:25,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:25,245 INFO L93 Difference]: Finished difference Result 2170 states and 7222 transitions. [2021-03-11 00:24:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:24:25,246 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 [2021-03-11 00:24:25,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:25,250 INFO L225 Difference]: With dead ends: 2170 [2021-03-11 00:24:25,250 INFO L226 Difference]: Without dead ends: 2145 [2021-03-11 00:24:25,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 977.2ms TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:24:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-03-11 00:24:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1588. [2021-03-11 00:24:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.420289855072464) internal successors, (5428), 1587 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5428 transitions. [2021-03-11 00:24:25,270 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5428 transitions. Word has length 26 [2021-03-11 00:24:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:25,271 INFO L480 AbstractCegarLoop]: Abstraction has 1588 states and 5428 transitions. [2021-03-11 00:24:25,271 INFO L481 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) [2021-03-11 00:24:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5428 transitions. [2021-03-11 00:24:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:25,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:25,273 INFO L519 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] [2021-03-11 00:24:25,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-03-11 00:24:25,473 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:25,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:25,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-03-11 00:24:25,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:25,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365848857] [2021-03-11 00:24:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:25,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365848857] [2021-03-11 00:24:25,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805345539] [2021-03-11 00:24:25,798 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 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 [2021-03-11 00:24:25,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:24:25,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:25,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:24:25,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:25,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:25,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:25,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:25,966 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 [2021-03-11 00:24:25,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:25,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:25,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:25,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:24:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:25,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:25,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:24:25,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127852798] [2021-03-11 00:24:25,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:24:25,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:25,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:24:25,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:24:25,992 INFO L87 Difference]: Start difference. First operand 1588 states and 5428 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) [2021-03-11 00:24:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:27,227 INFO L93 Difference]: Finished difference Result 2065 states and 6822 transitions. [2021-03-11 00:24:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:24:27,228 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 [2021-03-11 00:24:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:27,230 INFO L225 Difference]: With dead ends: 2065 [2021-03-11 00:24:27,230 INFO L226 Difference]: Without dead ends: 2043 [2021-03-11 00:24:27,231 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1259.4ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:24:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-03-11 00:24:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1580. [2021-03-11 00:24:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-03-11 00:24:27,250 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-03-11 00:24:27,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:27,250 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-03-11 00:24:27,250 INFO L481 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) [2021-03-11 00:24:27,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-03-11 00:24:27,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:27,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:27,252 INFO L519 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] [2021-03-11 00:24:27,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-03-11 00:24:27,453 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:27,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:27,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-03-11 00:24:27,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:27,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164353170] [2021-03-11 00:24:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:27,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164353170] [2021-03-11 00:24:27,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736896265] [2021-03-11 00:24:27,799 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 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 [2021-03-11 00:24:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:27,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:24:27,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:27,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:27,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:27,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:27,994 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 [2021-03-11 00:24:27,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:28,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:28,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:28,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:24:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:28,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:28,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:24:28,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554129751] [2021-03-11 00:24:28,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:24:28,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:28,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:24:28,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:24:28,026 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 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) [2021-03-11 00:24:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:29,444 INFO L93 Difference]: Finished difference Result 2212 states and 7331 transitions. [2021-03-11 00:24:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:24:29,444 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 [2021-03-11 00:24:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:29,448 INFO L225 Difference]: With dead ends: 2212 [2021-03-11 00:24:29,448 INFO L226 Difference]: Without dead ends: 2197 [2021-03-11 00:24:29,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1386.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:24:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-03-11 00:24:29,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1580. [2021-03-11 00:24:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-03-11 00:24:29,476 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-03-11 00:24:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:29,476 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-03-11 00:24:29,477 INFO L481 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) [2021-03-11 00:24:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-03-11 00:24:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:29,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:29,479 INFO L519 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] [2021-03-11 00:24:29,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:29,683 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:29,683 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-03-11 00:24:29,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:29,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253449421] [2021-03-11 00:24:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:29,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253449421] [2021-03-11 00:24:29,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172750151] [2021-03-11 00:24:29,967 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 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 [2021-03-11 00:24:29,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:24:29,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:29,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:24:29,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:30,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:30,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:30,225 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 [2021-03-11 00:24:30,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:24:30,398 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-03-11 00:24:30,399 INFO L628 ElimStorePlain]: treesize reduction 79, result has 51.8 percent of original size [2021-03-11 00:24:30,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:30,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:293 [2021-03-11 00:24:30,559 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2021-03-11 00:24:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:30,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:30,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-03-11 00:24:30,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188125304] [2021-03-11 00:24:30,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:24:30,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:30,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:24:30,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:24:30,665 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-03-11 00:24:31,942 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:24:33,269 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-03-11 00:24:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:35,010 INFO L93 Difference]: Finished difference Result 2788 states and 8924 transitions. [2021-03-11 00:24:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:24:35,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 [2021-03-11 00:24:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:35,015 INFO L225 Difference]: With dead ends: 2788 [2021-03-11 00:24:35,015 INFO L226 Difference]: Without dead ends: 2747 [2021-03-11 00:24:35,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 3705.0ms TimeCoverageRelationStatistics Valid=600, Invalid=3432, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:24:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-03-11 00:24:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 1590. [2021-03-11 00:24:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.42039018250472) internal successors, (5435), 1589 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:35,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5435 transitions. [2021-03-11 00:24:35,040 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5435 transitions. Word has length 26 [2021-03-11 00:24:35,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:35,040 INFO L480 AbstractCegarLoop]: Abstraction has 1590 states and 5435 transitions. [2021-03-11 00:24:35,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-03-11 00:24:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5435 transitions. [2021-03-11 00:24:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:35,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:35,042 INFO L519 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] [2021-03-11 00:24:35,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:35,243 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:35,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:35,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1044384706, now seen corresponding path program 51 times [2021-03-11 00:24:35,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:35,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109785859] [2021-03-11 00:24:35,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:35,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109785859] [2021-03-11 00:24:35,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462130778] [2021-03-11 00:24:35,546 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 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 [2021-03-11 00:24:35,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:24:35,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:35,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:24:35,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:35,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:35,778 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-03-11 00:24:35,779 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 98 treesize of output 94 [2021-03-11 00:24:35,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:35,832 INFO L628 ElimStorePlain]: treesize reduction 84, result has 27.6 percent of original size [2021-03-11 00:24:35,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:35,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:46 [2021-03-11 00:24:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:35,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:35,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-11 00:24:35,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423467416] [2021-03-11 00:24:35,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:24:35,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:35,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:24:35,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:24:35,951 INFO L87 Difference]: Start difference. First operand 1590 states and 5435 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-03-11 00:24:36,822 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:24:38,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:38,747 INFO L93 Difference]: Finished difference Result 2573 states and 8472 transitions. [2021-03-11 00:24:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:24:38,748 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 [2021-03-11 00:24:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:38,752 INFO L225 Difference]: With dead ends: 2573 [2021-03-11 00:24:38,752 INFO L226 Difference]: Without dead ends: 2532 [2021-03-11 00:24:38,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2587.6ms TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:24:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-03-11 00:24:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1583. [2021-03-11 00:24:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4190897597977243) internal successors, (5409), 1582 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5409 transitions. [2021-03-11 00:24:38,774 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5409 transitions. Word has length 26 [2021-03-11 00:24:38,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:38,774 INFO L480 AbstractCegarLoop]: Abstraction has 1583 states and 5409 transitions. [2021-03-11 00:24:38,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-03-11 00:24:38,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5409 transitions. [2021-03-11 00:24:38,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:38,776 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:38,777 INFO L519 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] [2021-03-11 00:24:38,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-03-11 00:24:38,979 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:38,979 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 52 times [2021-03-11 00:24:38,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:38,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526354100] [2021-03-11 00:24:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:39,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526354100] [2021-03-11 00:24:39,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577067580] [2021-03-11 00:24:39,277 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 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 [2021-03-11 00:24:39,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:24:39,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:39,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:24:39,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:39,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:39,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:39,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:24:39,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:24:39,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:39,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:39,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-03-11 00:24:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:39,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:39,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:24:39,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934261431] [2021-03-11 00:24:39,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:24:39,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:39,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:24:39,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:39,518 INFO L87 Difference]: Start difference. First operand 1583 states and 5409 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) [2021-03-11 00:24:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:41,295 INFO L93 Difference]: Finished difference Result 2559 states and 8411 transitions. [2021-03-11 00:24:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:24:41,296 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 [2021-03-11 00:24:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:41,300 INFO L225 Difference]: With dead ends: 2559 [2021-03-11 00:24:41,300 INFO L226 Difference]: Without dead ends: 2514 [2021-03-11 00:24:41,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1478.9ms TimeCoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:24:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-11 00:24:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1594. [2021-03-11 00:24:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.4199623352165727) internal successors, (5448), 1593 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5448 transitions. [2021-03-11 00:24:41,334 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5448 transitions. Word has length 26 [2021-03-11 00:24:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:41,334 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 5448 transitions. [2021-03-11 00:24:41,335 INFO L481 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) [2021-03-11 00:24:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5448 transitions. [2021-03-11 00:24:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:41,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:41,337 INFO L519 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] [2021-03-11 00:24:41,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-03-11 00:24:41,537 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:41,538 INFO L82 PathProgramCache]: Analyzing trace with hash -54538374, now seen corresponding path program 53 times [2021-03-11 00:24:41,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:41,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658490511] [2021-03-11 00:24:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:41,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658490511] [2021-03-11 00:24:41,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032355975] [2021-03-11 00:24:41,788 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 [2021-03-11 00:24:41,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:24:41,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:41,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:24:41,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:41,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:41,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:41,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:41,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:41,972 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 [2021-03-11 00:24:41,978 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:24:41,997 INFO L628 ElimStorePlain]: treesize reduction 24, result has 42.9 percent of original size [2021-03-11 00:24:41,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:41,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:18 [2021-03-11 00:24:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:42,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:42,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-03-11 00:24:42,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840978537] [2021-03-11 00:24:42,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:24:42,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:42,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:24:42,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:24:42,045 INFO L87 Difference]: Start difference. First operand 1594 states and 5448 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) [2021-03-11 00:24:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:46,037 INFO L93 Difference]: Finished difference Result 3314 states and 10467 transitions. [2021-03-11 00:24:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-11 00:24:46,038 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 [2021-03-11 00:24:46,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:46,044 INFO L225 Difference]: With dead ends: 3314 [2021-03-11 00:24:46,044 INFO L226 Difference]: Without dead ends: 3267 [2021-03-11 00:24:46,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 3146.7ms TimeCoverageRelationStatistics Valid=884, Invalid=4372, Unknown=0, NotChecked=0, Total=5256 [2021-03-11 00:24:46,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2021-03-11 00:24:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 1619. [2021-03-11 00:24:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.4283065512978985) internal successors, (5547), 1618 states have internal predecessors, (5547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5547 transitions. [2021-03-11 00:24:46,071 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5547 transitions. Word has length 26 [2021-03-11 00:24:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:46,071 INFO L480 AbstractCegarLoop]: Abstraction has 1619 states and 5547 transitions. [2021-03-11 00:24:46,072 INFO L481 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) [2021-03-11 00:24:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5547 transitions. [2021-03-11 00:24:46,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:46,074 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:46,074 INFO L519 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] [2021-03-11 00:24:46,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-03-11 00:24:46,274 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:46,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:46,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 30 times [2021-03-11 00:24:46,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:46,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246501248] [2021-03-11 00:24:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246501248] [2021-03-11 00:24:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662622544] [2021-03-11 00:24:46,416 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 [2021-03-11 00:24:46,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:24:46,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:46,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:24:46,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:46,688 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-03-11 00:24:46,688 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 61 treesize of output 48 [2021-03-11 00:24:46,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:46,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:46,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:46,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:17 [2021-03-11 00:24:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:46,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:46,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:24:46,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555293265] [2021-03-11 00:24:46,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:24:46,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:46,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:24:46,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:24:46,752 INFO L87 Difference]: Start difference. First operand 1619 states and 5547 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) [2021-03-11 00:24:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:48,330 INFO L93 Difference]: Finished difference Result 2129 states and 7041 transitions. [2021-03-11 00:24:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:24:48,331 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 [2021-03-11 00:24:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:48,334 INFO L225 Difference]: With dead ends: 2129 [2021-03-11 00:24:48,334 INFO L226 Difference]: Without dead ends: 2114 [2021-03-11 00:24:48,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1074.1ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:24:48,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-03-11 00:24:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1607. [2021-03-11 00:24:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.430884184308842) internal successors, (5510), 1606 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5510 transitions. [2021-03-11 00:24:48,362 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5510 transitions. Word has length 26 [2021-03-11 00:24:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:48,362 INFO L480 AbstractCegarLoop]: Abstraction has 1607 states and 5510 transitions. [2021-03-11 00:24:48,362 INFO L481 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) [2021-03-11 00:24:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5510 transitions. [2021-03-11 00:24:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:48,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:48,364 INFO L519 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] [2021-03-11 00:24:48,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-03-11 00:24:48,565 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:48,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:48,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1033146674, now seen corresponding path program 31 times [2021-03-11 00:24:48,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:48,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372043044] [2021-03-11 00:24:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:48,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372043044] [2021-03-11 00:24:48,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940947494] [2021-03-11 00:24:48,710 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 [2021-03-11 00:24:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:48,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:24:48,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:48,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:48,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:48,957 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 [2021-03-11 00:24:48,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:48,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:48,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:48,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:24:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:48,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:48,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:24:48,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510627480] [2021-03-11 00:24:48,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:24:48,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:48,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:24:48,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:24:48,992 INFO L87 Difference]: Start difference. First operand 1607 states and 5510 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) [2021-03-11 00:24:49,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:49,285 INFO L93 Difference]: Finished difference Result 1918 states and 6461 transitions. [2021-03-11 00:24:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:24:49,286 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 [2021-03-11 00:24:49,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:49,288 INFO L225 Difference]: With dead ends: 1918 [2021-03-11 00:24:49,288 INFO L226 Difference]: Without dead ends: 1903 [2021-03-11 00:24:49,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:24:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2021-03-11 00:24:49,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1601. [2021-03-11 00:24:49,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.430625) internal successors, (5489), 1600 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5489 transitions. [2021-03-11 00:24:49,306 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5489 transitions. Word has length 26 [2021-03-11 00:24:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:49,307 INFO L480 AbstractCegarLoop]: Abstraction has 1601 states and 5489 transitions. [2021-03-11 00:24:49,307 INFO L481 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) [2021-03-11 00:24:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5489 transitions. [2021-03-11 00:24:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:49,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:49,309 INFO L519 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] [2021-03-11 00:24:49,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-03-11 00:24:49,509 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 32 times [2021-03-11 00:24:49,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:49,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528671001] [2021-03-11 00:24:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:49,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528671001] [2021-03-11 00:24:49,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151794389] [2021-03-11 00:24:49,653 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 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 [2021-03-11 00:24:49,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:24:49,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:49,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:24:49,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:49,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:49,858 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-03-11 00:24:49,859 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 64 treesize of output 59 [2021-03-11 00:24:49,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:49,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:49,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:49,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:32 [2021-03-11 00:24:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:49,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:49,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:24:49,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283529455] [2021-03-11 00:24:49,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:24:49,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:49,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:24:49,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:24:49,957 INFO L87 Difference]: Start difference. First operand 1601 states and 5489 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:24:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:51,225 INFO L93 Difference]: Finished difference Result 2777 states and 9028 transitions. [2021-03-11 00:24:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:24:51,226 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 [2021-03-11 00:24:51,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:51,231 INFO L225 Difference]: With dead ends: 2777 [2021-03-11 00:24:51,231 INFO L226 Difference]: Without dead ends: 2726 [2021-03-11 00:24:51,231 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1059.0ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:24:51,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-03-11 00:24:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1631. [2021-03-11 00:24:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.4404907975460124) internal successors, (5608), 1630 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5608 transitions. [2021-03-11 00:24:51,255 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5608 transitions. Word has length 26 [2021-03-11 00:24:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:51,256 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 5608 transitions. [2021-03-11 00:24:51,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:24:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5608 transitions. [2021-03-11 00:24:51,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:51,258 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:51,258 INFO L519 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] [2021-03-11 00:24:51,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:51,458 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:51,458 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 33 times [2021-03-11 00:24:51,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:51,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827216746] [2021-03-11 00:24:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:51,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827216746] [2021-03-11 00:24:51,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495583326] [2021-03-11 00:24:51,624 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 [2021-03-11 00:24:51,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:24:51,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:51,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:24:51,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:51,896 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-03-11 00:24:51,897 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 41 [2021-03-11 00:24:51,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:51,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:51,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:51,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:5 [2021-03-11 00:24:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:51,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:51,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:24:51,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687767993] [2021-03-11 00:24:51,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:24:51,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:51,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:24:51,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:51,924 INFO L87 Difference]: Start difference. First operand 1631 states and 5608 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) [2021-03-11 00:24:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:52,451 INFO L93 Difference]: Finished difference Result 2060 states and 6895 transitions. [2021-03-11 00:24:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:24:52,451 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 [2021-03-11 00:24:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:52,455 INFO L225 Difference]: With dead ends: 2060 [2021-03-11 00:24:52,455 INFO L226 Difference]: Without dead ends: 2039 [2021-03-11 00:24:52,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:24:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-03-11 00:24:52,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1631. [2021-03-11 00:24:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.4404907975460124) internal successors, (5608), 1630 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:52,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5608 transitions. [2021-03-11 00:24:52,475 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5608 transitions. Word has length 26 [2021-03-11 00:24:52,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:52,475 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 5608 transitions. [2021-03-11 00:24:52,475 INFO L481 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) [2021-03-11 00:24:52,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5608 transitions. [2021-03-11 00:24:52,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:52,477 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:52,477 INFO L519 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] [2021-03-11 00:24:52,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-03-11 00:24:52,678 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:52,679 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 34 times [2021-03-11 00:24:52,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:52,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923446990] [2021-03-11 00:24:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:52,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923446990] [2021-03-11 00:24:52,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371512449] [2021-03-11 00:24:52,855 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 [2021-03-11 00:24:52,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:24:52,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:52,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:24:52,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:53,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:53,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:53,056 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 [2021-03-11 00:24:53,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:53,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:53,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:53,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:24:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:53,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:53,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:24:53,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270651225] [2021-03-11 00:24:53,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:24:53,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:53,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:24:53,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:24:53,088 INFO L87 Difference]: Start difference. First operand 1631 states and 5608 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) [2021-03-11 00:24:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:53,422 INFO L93 Difference]: Finished difference Result 1947 states and 6547 transitions. [2021-03-11 00:24:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:24:53,423 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 [2021-03-11 00:24:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:53,426 INFO L225 Difference]: With dead ends: 1947 [2021-03-11 00:24:53,426 INFO L226 Difference]: Without dead ends: 1928 [2021-03-11 00:24:53,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:24:53,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-03-11 00:24:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1625. [2021-03-11 00:24:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.440270935960591) internal successors, (5587), 1624 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5587 transitions. [2021-03-11 00:24:53,457 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5587 transitions. Word has length 26 [2021-03-11 00:24:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:53,457 INFO L480 AbstractCegarLoop]: Abstraction has 1625 states and 5587 transitions. [2021-03-11 00:24:53,457 INFO L481 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) [2021-03-11 00:24:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5587 transitions. [2021-03-11 00:24:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:53,460 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:53,460 INFO L519 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] [2021-03-11 00:24:53,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:53,660 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash 475685792, now seen corresponding path program 35 times [2021-03-11 00:24:53,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:53,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200076596] [2021-03-11 00:24:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:53,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200076596] [2021-03-11 00:24:53,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415796448] [2021-03-11 00:24:53,823 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 [2021-03-11 00:24:53,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:24:53,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:53,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:24:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:53,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:54,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:54,006 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 3 case distinctions, treesize of input 22 treesize of output 30 [2021-03-11 00:24:54,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:54,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:54,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:54,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:125 [2021-03-11 00:24:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:54,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:54,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-11 00:24:54,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448427697] [2021-03-11 00:24:54,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:24:54,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:54,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:24:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:54,176 INFO L87 Difference]: Start difference. First operand 1625 states and 5587 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) [2021-03-11 00:24:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:56,292 INFO L93 Difference]: Finished difference Result 2536 states and 8195 transitions. [2021-03-11 00:24:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:24:56,293 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 [2021-03-11 00:24:56,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:56,296 INFO L225 Difference]: With dead ends: 2536 [2021-03-11 00:24:56,297 INFO L226 Difference]: Without dead ends: 2486 [2021-03-11 00:24:56,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1601.5ms TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:24:56,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-03-11 00:24:56,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1619. [2021-03-11 00:24:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.434487021013597) internal successors, (5557), 1618 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5557 transitions. [2021-03-11 00:24:56,319 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5557 transitions. Word has length 26 [2021-03-11 00:24:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:56,319 INFO L480 AbstractCegarLoop]: Abstraction has 1619 states and 5557 transitions. [2021-03-11 00:24:56,319 INFO L481 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) [2021-03-11 00:24:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5557 transitions. [2021-03-11 00:24:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:56,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:56,321 INFO L519 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] [2021-03-11 00:24:56,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:56,522 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:56,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1353247494, now seen corresponding path program 36 times [2021-03-11 00:24:56,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:56,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501664234] [2021-03-11 00:24:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:56,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501664234] [2021-03-11 00:24:56,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296674359] [2021-03-11 00:24:56,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:24:56,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:24:56,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:56,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:24:56,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:56,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:56,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:24:56,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:24:56,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:56,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:56,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:56,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:24:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:56,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:56,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:24:56,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025552230] [2021-03-11 00:24:56,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:24:56,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:56,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:24:56,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:24:56,930 INFO L87 Difference]: Start difference. First operand 1619 states and 5557 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) [2021-03-11 00:24:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:57,135 INFO L93 Difference]: Finished difference Result 1694 states and 5722 transitions. [2021-03-11 00:24:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:24:57,135 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 [2021-03-11 00:24:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:57,138 INFO L225 Difference]: With dead ends: 1694 [2021-03-11 00:24:57,138 INFO L226 Difference]: Without dead ends: 1675 [2021-03-11 00:24:57,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:57,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-03-11 00:24:57,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1611. [2021-03-11 00:24:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.432919254658385) internal successors, (5527), 1610 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5527 transitions. [2021-03-11 00:24:57,156 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5527 transitions. Word has length 26 [2021-03-11 00:24:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:57,156 INFO L480 AbstractCegarLoop]: Abstraction has 1611 states and 5527 transitions. [2021-03-11 00:24:57,157 INFO L481 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) [2021-03-11 00:24:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5527 transitions. [2021-03-11 00:24:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:57,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:57,159 INFO L519 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] [2021-03-11 00:24:57,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:57,359 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:57,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:57,359 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 37 times [2021-03-11 00:24:57,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:57,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748038641] [2021-03-11 00:24:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:57,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748038641] [2021-03-11 00:24:57,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781389266] [2021-03-11 00:24:57,526 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 [2021-03-11 00:24:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:57,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:24:57,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:57,746 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-03-11 00:24:57,747 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 [2021-03-11 00:24:57,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:57,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:57,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:57,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-03-11 00:24:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:57,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:57,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:24:57,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486987640] [2021-03-11 00:24:57,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:24:57,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:57,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:24:57,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:24:57,779 INFO L87 Difference]: Start difference. First operand 1611 states and 5527 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) [2021-03-11 00:24:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:58,051 INFO L93 Difference]: Finished difference Result 1742 states and 5886 transitions. [2021-03-11 00:24:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:24:58,052 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 [2021-03-11 00:24:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:58,055 INFO L225 Difference]: With dead ends: 1742 [2021-03-11 00:24:58,055 INFO L226 Difference]: Without dead ends: 1727 [2021-03-11 00:24:58,055 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 331.7ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-03-11 00:24:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1599. [2021-03-11 00:24:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4399249061326658) internal successors, (5497), 1598 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5497 transitions. [2021-03-11 00:24:58,074 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5497 transitions. Word has length 26 [2021-03-11 00:24:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:58,074 INFO L480 AbstractCegarLoop]: Abstraction has 1599 states and 5497 transitions. [2021-03-11 00:24:58,074 INFO L481 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) [2021-03-11 00:24:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5497 transitions. [2021-03-11 00:24:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:58,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:58,076 INFO L519 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] [2021-03-11 00:24:58,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-03-11 00:24:58,291 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:58,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1929714430, now seen corresponding path program 38 times [2021-03-11 00:24:58,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:58,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778043358] [2021-03-11 00:24:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:58,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778043358] [2021-03-11 00:24:58,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234571371] [2021-03-11 00:24:58,461 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 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 [2021-03-11 00:24:58,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:24:58,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:58,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:24:58,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:58,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:58,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:24:58,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:58,646 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 [2021-03-11 00:24:58,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:24:58,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:58,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:58,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-03-11 00:24:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:58,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:58,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:24:58,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595888734] [2021-03-11 00:24:58,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:24:58,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:58,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:24:58,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:24:58,722 INFO L87 Difference]: Start difference. First operand 1599 states and 5497 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) [2021-03-11 00:24:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:59,510 INFO L93 Difference]: Finished difference Result 2325 states and 7667 transitions. [2021-03-11 00:24:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:24:59,510 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 [2021-03-11 00:24:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:59,514 INFO L225 Difference]: With dead ends: 2325 [2021-03-11 00:24:59,514 INFO L226 Difference]: Without dead ends: 2279 [2021-03-11 00:24:59,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 709.8ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:24:59,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-03-11 00:24:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1606. [2021-03-11 00:24:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.4386292834890964) internal successors, (5519), 1605 states have internal predecessors, (5519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5519 transitions. [2021-03-11 00:24:59,536 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5519 transitions. Word has length 26 [2021-03-11 00:24:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:59,537 INFO L480 AbstractCegarLoop]: Abstraction has 1606 states and 5519 transitions. [2021-03-11 00:24:59,537 INFO L481 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) [2021-03-11 00:24:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5519 transitions. [2021-03-11 00:24:59,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:24:59,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:59,539 INFO L519 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] [2021-03-11 00:24:59,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-03-11 00:24:59,739 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1357140426, now seen corresponding path program 39 times [2021-03-11 00:24:59,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:59,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208914462] [2021-03-11 00:24:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:59,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208914462] [2021-03-11 00:24:59,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523347232] [2021-03-11 00:24:59,887 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 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 [2021-03-11 00:24:59,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:24:59,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:59,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:24:59,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:00,113 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:25:00,114 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 [2021-03-11 00:25:00,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:00,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:00,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:25:00,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:67 [2021-03-11 00:25:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:00,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:00,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:25:00,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550022877] [2021-03-11 00:25:00,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:00,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:00,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:00,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:00,245 INFO L87 Difference]: Start difference. First operand 1606 states and 5519 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) [2021-03-11 00:25:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:01,040 INFO L93 Difference]: Finished difference Result 2392 states and 7918 transitions. [2021-03-11 00:25:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:25:01,041 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 [2021-03-11 00:25:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:01,045 INFO L225 Difference]: With dead ends: 2392 [2021-03-11 00:25:01,045 INFO L226 Difference]: Without dead ends: 2373 [2021-03-11 00:25:01,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 817.1ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:25:01,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-03-11 00:25:01,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1609. [2021-03-11 00:25:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 3.4353233830845773) internal successors, (5524), 1608 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5524 transitions. [2021-03-11 00:25:01,068 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5524 transitions. Word has length 26 [2021-03-11 00:25:01,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:01,068 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 5524 transitions. [2021-03-11 00:25:01,068 INFO L481 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) [2021-03-11 00:25:01,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5524 transitions. [2021-03-11 00:25:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:01,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:01,071 INFO L519 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] [2021-03-11 00:25:01,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:01,271 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:01,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:01,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 40 times [2021-03-11 00:25:01,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:01,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618970735] [2021-03-11 00:25:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:01,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618970735] [2021-03-11 00:25:01,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246378204] [2021-03-11 00:25:01,453 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 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 [2021-03-11 00:25:01,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:25:01,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:01,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:25:01,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:01,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:01,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:01,680 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 [2021-03-11 00:25:01,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:25:01,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:01,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:01,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-03-11 00:25:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:01,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:01,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:25:01,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892808904] [2021-03-11 00:25:01,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:01,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:01,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:01,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:01,755 INFO L87 Difference]: Start difference. First operand 1609 states and 5524 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) [2021-03-11 00:25:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:02,211 INFO L93 Difference]: Finished difference Result 2162 states and 7222 transitions. [2021-03-11 00:25:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:25:02,212 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 [2021-03-11 00:25:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:02,215 INFO L225 Difference]: With dead ends: 2162 [2021-03-11 00:25:02,215 INFO L226 Difference]: Without dead ends: 2137 [2021-03-11 00:25:02,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 533.1ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:25:02,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-03-11 00:25:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1600. [2021-03-11 00:25:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.434021263289556) internal successors, (5491), 1599 states have internal predecessors, (5491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5491 transitions. [2021-03-11 00:25:02,235 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5491 transitions. Word has length 26 [2021-03-11 00:25:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:02,235 INFO L480 AbstractCegarLoop]: Abstraction has 1600 states and 5491 transitions. [2021-03-11 00:25:02,235 INFO L481 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) [2021-03-11 00:25:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5491 transitions. [2021-03-11 00:25:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:02,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:02,237 INFO L519 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] [2021-03-11 00:25:02,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-03-11 00:25:02,438 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash -48158490, now seen corresponding path program 41 times [2021-03-11 00:25:02,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:02,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083709341] [2021-03-11 00:25:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:02,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083709341] [2021-03-11 00:25:02,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538873763] [2021-03-11 00:25:02,581 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 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 [2021-03-11 00:25:02,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:25:02,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:02,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:25:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:02,853 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-03-11 00:25:02,853 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 [2021-03-11 00:25:02,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:02,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:02,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:02,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-03-11 00:25:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:02,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:02,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:25:02,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368613999] [2021-03-11 00:25:02,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:25:02,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:02,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:25:02,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:25:02,884 INFO L87 Difference]: Start difference. First operand 1600 states and 5491 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:25:03,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:03,461 INFO L93 Difference]: Finished difference Result 2058 states and 6891 transitions. [2021-03-11 00:25:03,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:25:03,462 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 [2021-03-11 00:25:03,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:03,465 INFO L225 Difference]: With dead ends: 2058 [2021-03-11 00:25:03,466 INFO L226 Difference]: Without dead ends: 2043 [2021-03-11 00:25:03,466 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 632.0ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:25:03,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-03-11 00:25:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1589. [2021-03-11 00:25:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1588 states have (on average 3.434508816120907) internal successors, (5454), 1588 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 5454 transitions. [2021-03-11 00:25:03,486 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 5454 transitions. Word has length 26 [2021-03-11 00:25:03,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:03,486 INFO L480 AbstractCegarLoop]: Abstraction has 1589 states and 5454 transitions. [2021-03-11 00:25:03,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:25:03,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 5454 transitions. [2021-03-11 00:25:03,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:03,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:03,488 INFO L519 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] [2021-03-11 00:25:03,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:03,689 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:03,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:03,689 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 42 times [2021-03-11 00:25:03,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:03,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275120130] [2021-03-11 00:25:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:03,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275120130] [2021-03-11 00:25:03,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882919929] [2021-03-11 00:25:03,837 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 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 [2021-03-11 00:25:03,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:25:03,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:03,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:25:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:04,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:04,080 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 22 treesize of output 32 [2021-03-11 00:25:04,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:04,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:04,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:04,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:25 [2021-03-11 00:25:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:04,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:04,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:25:04,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857094781] [2021-03-11 00:25:04,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:25:04,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:04,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:25:04,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:25:04,146 INFO L87 Difference]: Start difference. First operand 1589 states and 5454 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) [2021-03-11 00:25:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:05,350 INFO L93 Difference]: Finished difference Result 2237 states and 7390 transitions. [2021-03-11 00:25:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:25:05,351 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 [2021-03-11 00:25:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:05,355 INFO L225 Difference]: With dead ends: 2237 [2021-03-11 00:25:05,355 INFO L226 Difference]: Without dead ends: 2207 [2021-03-11 00:25:05,355 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 990.5ms TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:25:05,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-03-11 00:25:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1640. [2021-03-11 00:25:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.4283099450884684) internal successors, (5619), 1639 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5619 transitions. [2021-03-11 00:25:05,377 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5619 transitions. Word has length 26 [2021-03-11 00:25:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:05,377 INFO L480 AbstractCegarLoop]: Abstraction has 1640 states and 5619 transitions. [2021-03-11 00:25:05,377 INFO L481 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) [2021-03-11 00:25:05,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5619 transitions. [2021-03-11 00:25:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:05,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:05,380 INFO L519 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] [2021-03-11 00:25:05,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:05,594 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:05,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 43 times [2021-03-11 00:25:05,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:05,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608991376] [2021-03-11 00:25:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:05,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608991376] [2021-03-11 00:25:05,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026399234] [2021-03-11 00:25:05,749 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 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 [2021-03-11 00:25:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:05,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:25:05,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:05,936 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-03-11 00:25:05,937 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 [2021-03-11 00:25:05,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:05,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:05,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:05,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-03-11 00:25:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:06,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:06,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:25:06,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611558700] [2021-03-11 00:25:06,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:06,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:06,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:06,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:06,008 INFO L87 Difference]: Start difference. First operand 1640 states and 5619 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) [2021-03-11 00:25:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:06,566 INFO L93 Difference]: Finished difference Result 2346 states and 7809 transitions. [2021-03-11 00:25:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:25:06,566 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 [2021-03-11 00:25:06,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:06,570 INFO L225 Difference]: With dead ends: 2346 [2021-03-11 00:25:06,570 INFO L226 Difference]: Without dead ends: 2331 [2021-03-11 00:25:06,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 561.6ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:25:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-03-11 00:25:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1634. [2021-03-11 00:25:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.4280465401102265) internal successors, (5598), 1633 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5598 transitions. [2021-03-11 00:25:06,594 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5598 transitions. Word has length 26 [2021-03-11 00:25:06,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:06,594 INFO L480 AbstractCegarLoop]: Abstraction has 1634 states and 5598 transitions. [2021-03-11 00:25:06,594 INFO L481 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) [2021-03-11 00:25:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5598 transitions. [2021-03-11 00:25:06,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:06,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:06,596 INFO L519 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] [2021-03-11 00:25:06,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-03-11 00:25:06,797 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:06,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:06,797 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 44 times [2021-03-11 00:25:06,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:06,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988323976] [2021-03-11 00:25:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:06,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988323976] [2021-03-11 00:25:06,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207367936] [2021-03-11 00:25:06,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:25:06,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:25:06,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:06,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:25:06,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:07,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:07,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:07,137 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 [2021-03-11 00:25:07,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:07,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:07,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:25:07,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:67 [2021-03-11 00:25:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:07,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:07,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:25:07,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330169486] [2021-03-11 00:25:07,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:07,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:07,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:07,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:07,255 INFO L87 Difference]: Start difference. First operand 1634 states and 5598 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) [2021-03-11 00:25:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:07,658 INFO L93 Difference]: Finished difference Result 2148 states and 7204 transitions. [2021-03-11 00:25:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:25:07,659 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 [2021-03-11 00:25:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:07,662 INFO L225 Difference]: With dead ends: 2148 [2021-03-11 00:25:07,662 INFO L226 Difference]: Without dead ends: 2133 [2021-03-11 00:25:07,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 516.0ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:25:07,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-03-11 00:25:07,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1637. [2021-03-11 00:25:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.4315403422982884) internal successors, (5614), 1636 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) [2021-03-11 00:25:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5614 transitions. [2021-03-11 00:25:07,683 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5614 transitions. Word has length 26 [2021-03-11 00:25:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:07,683 INFO L480 AbstractCegarLoop]: Abstraction has 1637 states and 5614 transitions. [2021-03-11 00:25:07,683 INFO L481 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) [2021-03-11 00:25:07,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5614 transitions. [2021-03-11 00:25:07,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:07,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:07,685 INFO L519 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] [2021-03-11 00:25:07,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-03-11 00:25:07,885 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 45 times [2021-03-11 00:25:07,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:07,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672974757] [2021-03-11 00:25:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:08,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672974757] [2021-03-11 00:25:08,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262089917] [2021-03-11 00:25:08,013 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 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 [2021-03-11 00:25:08,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:25:08,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:08,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:25:08,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:08,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:08,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:08,206 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 25 treesize of output 31 [2021-03-11 00:25:08,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:25:08,273 INFO L628 ElimStorePlain]: treesize reduction 8, result has 88.1 percent of original size [2021-03-11 00:25:08,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:25:08,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:76 [2021-03-11 00:25:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:08,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:08,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-11 00:25:08,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665733730] [2021-03-11 00:25:08,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:25:08,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:08,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:25:08,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:25:08,409 INFO L87 Difference]: Start difference. First operand 1637 states and 5614 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2021-03-11 00:25:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:08,945 INFO L93 Difference]: Finished difference Result 2178 states and 7300 transitions. [2021-03-11 00:25:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:25:08,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 26 [2021-03-11 00:25:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:08,949 INFO L225 Difference]: With dead ends: 2178 [2021-03-11 00:25:08,949 INFO L226 Difference]: Without dead ends: 2163 [2021-03-11 00:25:08,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 533.3ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:25:08,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-03-11 00:25:08,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1655. [2021-03-11 00:25:08,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 3.4268440145102783) internal successors, (5668), 1654 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 5668 transitions. [2021-03-11 00:25:08,971 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 5668 transitions. Word has length 26 [2021-03-11 00:25:08,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:08,971 INFO L480 AbstractCegarLoop]: Abstraction has 1655 states and 5668 transitions. [2021-03-11 00:25:08,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2021-03-11 00:25:08,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 5668 transitions. [2021-03-11 00:25:08,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:08,973 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:08,973 INFO L519 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] [2021-03-11 00:25:09,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:09,174 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:09,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:09,174 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 46 times [2021-03-11 00:25:09,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:09,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183378618] [2021-03-11 00:25:09,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:09,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183378618] [2021-03-11 00:25:09,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80788144] [2021-03-11 00:25:09,320 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 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 [2021-03-11 00:25:09,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:25:09,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:25:09,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:09,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:09,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:09,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:09,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:09,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:25:09,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:25:09,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:09,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:09,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-03-11 00:25:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:09,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:09,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:25:09,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241409315] [2021-03-11 00:25:09,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:09,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:09,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:09,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:09,577 INFO L87 Difference]: Start difference. First operand 1655 states and 5668 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) [2021-03-11 00:25:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:10,656 INFO L93 Difference]: Finished difference Result 2191 states and 7346 transitions. [2021-03-11 00:25:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:25:10,657 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 [2021-03-11 00:25:10,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:10,660 INFO L225 Difference]: With dead ends: 2191 [2021-03-11 00:25:10,660 INFO L226 Difference]: Without dead ends: 2176 [2021-03-11 00:25:10,661 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 784.5ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:25:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-03-11 00:25:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1673. [2021-03-11 00:25:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.424043062200957) internal successors, (5725), 1672 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5725 transitions. [2021-03-11 00:25:10,684 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5725 transitions. Word has length 26 [2021-03-11 00:25:10,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:10,684 INFO L480 AbstractCegarLoop]: Abstraction has 1673 states and 5725 transitions. [2021-03-11 00:25:10,684 INFO L481 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) [2021-03-11 00:25:10,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5725 transitions. [2021-03-11 00:25:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:10,686 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:10,686 INFO L519 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] [2021-03-11 00:25:10,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-03-11 00:25:10,887 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:10,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:10,887 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-03-11 00:25:10,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:10,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903430688] [2021-03-11 00:25:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:11,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903430688] [2021-03-11 00:25:11,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934058128] [2021-03-11 00:25:11,084 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 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 [2021-03-11 00:25:11,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:25:11,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:25:11,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:11,357 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:25:11,357 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 [2021-03-11 00:25:11,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:11,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:11,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:25:11,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:75 [2021-03-11 00:25:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:11,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:11,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:25:11,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631832701] [2021-03-11 00:25:11,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:25:11,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:11,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:25:11,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:25:11,489 INFO L87 Difference]: Start difference. First operand 1673 states and 5725 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) [2021-03-11 00:25:12,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:12,204 INFO L93 Difference]: Finished difference Result 2244 states and 7491 transitions. [2021-03-11 00:25:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:25:12,205 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 [2021-03-11 00:25:12,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:12,209 INFO L225 Difference]: With dead ends: 2244 [2021-03-11 00:25:12,209 INFO L226 Difference]: Without dead ends: 2219 [2021-03-11 00:25:12,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 735.6ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:25:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-03-11 00:25:12,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1674. [2021-03-11 00:25:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.4273759713090257) internal successors, (5734), 1673 states have internal predecessors, (5734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5734 transitions. [2021-03-11 00:25:12,232 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5734 transitions. Word has length 26 [2021-03-11 00:25:12,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:12,232 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 5734 transitions. [2021-03-11 00:25:12,232 INFO L481 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) [2021-03-11 00:25:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5734 transitions. [2021-03-11 00:25:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:12,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:12,234 INFO L519 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] [2021-03-11 00:25:12,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:12,435 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:12,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:12,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-03-11 00:25:12,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:12,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854011825] [2021-03-11 00:25:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:12,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854011825] [2021-03-11 00:25:12,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295286160] [2021-03-11 00:25:12,583 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 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 [2021-03-11 00:25:12,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:25:12,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:12,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:25:12,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:12,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:12,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:12,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:25:12,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:25:12,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:12,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:12,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-03-11 00:25:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:12,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:12,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:25:12,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955414454] [2021-03-11 00:25:12,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:12,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:12,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:12,858 INFO L87 Difference]: Start difference. First operand 1674 states and 5734 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) [2021-03-11 00:25:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:13,639 INFO L93 Difference]: Finished difference Result 2307 states and 7682 transitions. [2021-03-11 00:25:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:25:13,640 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 [2021-03-11 00:25:13,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:13,643 INFO L225 Difference]: With dead ends: 2307 [2021-03-11 00:25:13,643 INFO L226 Difference]: Without dead ends: 2271 [2021-03-11 00:25:13,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 706.2ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:25:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2021-03-11 00:25:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1692. [2021-03-11 00:25:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.4299231224127733) internal successors, (5800), 1691 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5800 transitions. [2021-03-11 00:25:13,665 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5800 transitions. Word has length 26 [2021-03-11 00:25:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:13,665 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 5800 transitions. [2021-03-11 00:25:13,665 INFO L481 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) [2021-03-11 00:25:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5800 transitions. [2021-03-11 00:25:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:13,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:13,667 INFO L519 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] [2021-03-11 00:25:13,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-03-11 00:25:13,868 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2134220646, now seen corresponding path program 54 times [2021-03-11 00:25:13,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:13,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140773905] [2021-03-11 00:25:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:14,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140773905] [2021-03-11 00:25:14,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662277358] [2021-03-11 00:25:14,209 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 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 [2021-03-11 00:25:14,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:25:14,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:14,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:25:14,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:14,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:14,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:14,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:14,362 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 [2021-03-11 00:25:14,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:14,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:14,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:14,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:25:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:14,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:14,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-03-11 00:25:14,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913076152] [2021-03-11 00:25:14,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:25:14,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:14,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:25:14,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:25:14,388 INFO L87 Difference]: Start difference. First operand 1692 states and 5800 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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) [2021-03-11 00:25:15,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:15,212 INFO L93 Difference]: Finished difference Result 2173 states and 7209 transitions. [2021-03-11 00:25:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:25:15,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 26 [2021-03-11 00:25:15,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:15,216 INFO L225 Difference]: With dead ends: 2173 [2021-03-11 00:25:15,216 INFO L226 Difference]: Without dead ends: 2147 [2021-03-11 00:25:15,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 946.2ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:25:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-03-11 00:25:15,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1684. [2021-03-11 00:25:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.4307783719548426) internal successors, (5774), 1683 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:15,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5774 transitions. [2021-03-11 00:25:15,237 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5774 transitions. Word has length 26 [2021-03-11 00:25:15,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:15,237 INFO L480 AbstractCegarLoop]: Abstraction has 1684 states and 5774 transitions. [2021-03-11 00:25:15,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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) [2021-03-11 00:25:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5774 transitions. [2021-03-11 00:25:15,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:15,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:15,239 INFO L519 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] [2021-03-11 00:25:15,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:15,440 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:15,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-03-11 00:25:15,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:15,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557110327] [2021-03-11 00:25:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:15,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557110327] [2021-03-11 00:25:15,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044891439] [2021-03-11 00:25:15,640 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 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 [2021-03-11 00:25:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:15,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:25:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:15,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:15,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:15,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:15,822 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 [2021-03-11 00:25:15,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:15,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:15,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:15,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:25:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:15,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:15,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:25:15,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259492421] [2021-03-11 00:25:15,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:25:15,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:15,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:25:15,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:25:15,850 INFO L87 Difference]: Start difference. First operand 1684 states and 5774 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) 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) [2021-03-11 00:25:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:16,388 INFO L93 Difference]: Finished difference Result 2015 states and 6632 transitions. [2021-03-11 00:25:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:25:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 26 [2021-03-11 00:25:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:16,392 INFO L225 Difference]: With dead ends: 2015 [2021-03-11 00:25:16,392 INFO L226 Difference]: Without dead ends: 1993 [2021-03-11 00:25:16,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 586.5ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:25:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-03-11 00:25:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1686. [2021-03-11 00:25:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.430860534124629) internal successors, (5781), 1685 states have internal predecessors, (5781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5781 transitions. [2021-03-11 00:25:16,415 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5781 transitions. Word has length 26 [2021-03-11 00:25:16,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:16,415 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 5781 transitions. [2021-03-11 00:25:16,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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) [2021-03-11 00:25:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5781 transitions. [2021-03-11 00:25:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:16,417 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:16,417 INFO L519 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] [2021-03-11 00:25:16,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-03-11 00:25:16,619 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:16,620 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-03-11 00:25:16,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:16,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424992768] [2021-03-11 00:25:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:16,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424992768] [2021-03-11 00:25:16,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179242716] [2021-03-11 00:25:16,875 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 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 [2021-03-11 00:25:16,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:25:16,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:16,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:25:16,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:17,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:17,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:17,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:17,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:17,059 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 [2021-03-11 00:25:17,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:17,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:17,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:17,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:25:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:17,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:17,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:25:17,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652033452] [2021-03-11 00:25:17,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:25:17,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:17,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:25:17,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:25:17,095 INFO L87 Difference]: Start difference. First operand 1686 states and 5781 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-03-11 00:25:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:17,696 INFO L93 Difference]: Finished difference Result 2069 states and 6957 transitions. [2021-03-11 00:25:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:25:17,699 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 [2021-03-11 00:25:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:17,703 INFO L225 Difference]: With dead ends: 2069 [2021-03-11 00:25:17,703 INFO L226 Difference]: Without dead ends: 2038 [2021-03-11 00:25:17,703 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 694.0ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:25:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-03-11 00:25:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1692. [2021-03-11 00:25:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.4287403903015967) internal successors, (5798), 1691 states have internal predecessors, (5798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5798 transitions. [2021-03-11 00:25:17,724 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5798 transitions. Word has length 26 [2021-03-11 00:25:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:17,724 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 5798 transitions. [2021-03-11 00:25:17,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-03-11 00:25:17,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5798 transitions. [2021-03-11 00:25:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:17,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:17,726 INFO L519 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] [2021-03-11 00:25:17,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-03-11 00:25:17,935 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:17,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:17,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-03-11 00:25:17,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:17,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023237825] [2021-03-11 00:25:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:18,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023237825] [2021-03-11 00:25:18,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424040919] [2021-03-11 00:25:18,167 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 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 [2021-03-11 00:25:18,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:25:18,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:18,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:25:18,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:18,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:18,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:18,394 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 28 treesize of output 32 [2021-03-11 00:25:18,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:18,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:18,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:18,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:81 [2021-03-11 00:25:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:18,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:18,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:25:18,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695214482] [2021-03-11 00:25:18,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:25:18,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:18,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:25:18,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:25:18,543 INFO L87 Difference]: Start difference. First operand 1692 states and 5798 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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) [2021-03-11 00:25:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:19,185 INFO L93 Difference]: Finished difference Result 2105 states and 7051 transitions. [2021-03-11 00:25:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:25:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 26 [2021-03-11 00:25:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:19,189 INFO L225 Difference]: With dead ends: 2105 [2021-03-11 00:25:19,190 INFO L226 Difference]: Without dead ends: 2090 [2021-03-11 00:25:19,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 768.1ms TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:25:19,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-03-11 00:25:19,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1692. [2021-03-11 00:25:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.4287403903015967) internal successors, (5798), 1691 states have internal predecessors, (5798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5798 transitions. [2021-03-11 00:25:19,212 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5798 transitions. Word has length 26 [2021-03-11 00:25:19,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:19,212 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 5798 transitions. [2021-03-11 00:25:19,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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) [2021-03-11 00:25:19,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5798 transitions. [2021-03-11 00:25:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:19,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:19,214 INFO L519 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] [2021-03-11 00:25:19,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:19,415 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:19,415 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-03-11 00:25:19,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:19,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379400930] [2021-03-11 00:25:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:19,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379400930] [2021-03-11 00:25:19,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425206980] [2021-03-11 00:25:19,644 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 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 [2021-03-11 00:25:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:19,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:25:19,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:19,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:19,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:19,817 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 [2021-03-11 00:25:19,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:25:19,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:19,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:19,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-03-11 00:25:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:19,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:19,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:25:19,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784332478] [2021-03-11 00:25:19,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:19,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:19,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:19,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:19,887 INFO L87 Difference]: Start difference. First operand 1692 states and 5798 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) [2021-03-11 00:25:21,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:21,653 INFO L93 Difference]: Finished difference Result 2382 states and 7859 transitions. [2021-03-11 00:25:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:25:21,654 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 [2021-03-11 00:25:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:21,658 INFO L225 Difference]: With dead ends: 2382 [2021-03-11 00:25:21,658 INFO L226 Difference]: Without dead ends: 2367 [2021-03-11 00:25:21,659 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1226.0ms TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:25:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-03-11 00:25:21,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1699. [2021-03-11 00:25:21,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 3.4287396937573615) internal successors, (5822), 1698 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 5822 transitions. [2021-03-11 00:25:21,688 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 5822 transitions. Word has length 26 [2021-03-11 00:25:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:21,688 INFO L480 AbstractCegarLoop]: Abstraction has 1699 states and 5822 transitions. [2021-03-11 00:25:21,688 INFO L481 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) [2021-03-11 00:25:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 5822 transitions. [2021-03-11 00:25:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:21,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:21,691 INFO L519 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] [2021-03-11 00:25:21,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:21,891 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:21,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-03-11 00:25:21,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:21,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017512114] [2021-03-11 00:25:21,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:22,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017512114] [2021-03-11 00:25:22,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170888211] [2021-03-11 00:25:22,048 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 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 [2021-03-11 00:25:22,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:25:22,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:22,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:25:22,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:22,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:22,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:22,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:22,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:22,278 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 [2021-03-11 00:25:22,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:22,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:22,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:22,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-03-11 00:25:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:22,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:22,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:25:22,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841200331] [2021-03-11 00:25:22,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:25:22,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:22,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:25:22,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:25:22,307 INFO L87 Difference]: Start difference. First operand 1699 states and 5822 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) [2021-03-11 00:25:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:23,474 INFO L93 Difference]: Finished difference Result 2569 states and 8218 transitions. [2021-03-11 00:25:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:25:23,475 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 [2021-03-11 00:25:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:23,480 INFO L225 Difference]: With dead ends: 2569 [2021-03-11 00:25:23,480 INFO L226 Difference]: Without dead ends: 2547 [2021-03-11 00:25:23,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 894.7ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:25:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-03-11 00:25:23,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 1746. [2021-03-11 00:25:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 3.428080229226361) internal successors, (5982), 1745 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5982 transitions. [2021-03-11 00:25:23,515 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5982 transitions. Word has length 26 [2021-03-11 00:25:23,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:23,515 INFO L480 AbstractCegarLoop]: Abstraction has 1746 states and 5982 transitions. [2021-03-11 00:25:23,515 INFO L481 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) [2021-03-11 00:25:23,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5982 transitions. [2021-03-11 00:25:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:23,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:23,518 INFO L519 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] [2021-03-11 00:25:23,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:23,718 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:23,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-03-11 00:25:23,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:23,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566394951] [2021-03-11 00:25:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:23,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566394951] [2021-03-11 00:25:23,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132162135] [2021-03-11 00:25:23,907 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 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 [2021-03-11 00:25:23,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:25:23,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:23,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:25:23,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:24,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:24,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:24,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:24,090 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 [2021-03-11 00:25:24,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:24,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:24,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:24,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-03-11 00:25:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:24,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:24,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:25:24,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812330764] [2021-03-11 00:25:24,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:25:24,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:24,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:25:24,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:25:24,125 INFO L87 Difference]: Start difference. First operand 1746 states and 5982 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) [2021-03-11 00:25:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:25,214 INFO L93 Difference]: Finished difference Result 3031 states and 9775 transitions. [2021-03-11 00:25:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:25:25,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:25:25,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:25,220 INFO L225 Difference]: With dead ends: 3031 [2021-03-11 00:25:25,220 INFO L226 Difference]: Without dead ends: 3001 [2021-03-11 00:25:25,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 821.4ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:25:25,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-03-11 00:25:25,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1808. [2021-03-11 00:25:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1807 states have (on average 3.4305478693967904) internal successors, (6199), 1807 states have internal predecessors, (6199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 6199 transitions. [2021-03-11 00:25:25,247 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 6199 transitions. Word has length 26 [2021-03-11 00:25:25,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:25,247 INFO L480 AbstractCegarLoop]: Abstraction has 1808 states and 6199 transitions. [2021-03-11 00:25:25,247 INFO L481 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) [2021-03-11 00:25:25,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 6199 transitions. [2021-03-11 00:25:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:25,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:25,249 INFO L519 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] [2021-03-11 00:25:25,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:25,451 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:25,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:25,451 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-03-11 00:25:25,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:25,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78664844] [2021-03-11 00:25:25,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:25,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78664844] [2021-03-11 00:25:25,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335329508] [2021-03-11 00:25:25,675 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 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 [2021-03-11 00:25:25,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:25:25,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:25,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:25:25,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:25,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:25,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:25,964 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 [2021-03-11 00:25:25,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:25:26,164 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-03-11 00:25:26,164 INFO L628 ElimStorePlain]: treesize reduction 95, result has 45.4 percent of original size [2021-03-11 00:25:26,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:26,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:325 [2021-03-11 00:25:26,346 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-11 00:25:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:26,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:26,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-11 00:25:26,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54235332] [2021-03-11 00:25:26,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:25:26,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:26,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:25:26,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:25:26,465 INFO L87 Difference]: Start difference. First operand 1808 states and 6199 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) [2021-03-11 00:25:28,438 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-03-11 00:25:28,776 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-11 00:25:29,175 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-03-11 00:25:29,328 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-11 00:25:29,747 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-03-11 00:25:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:29,931 INFO L93 Difference]: Finished difference Result 3468 states and 10976 transitions. [2021-03-11 00:25:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:25:29,931 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 [2021-03-11 00:25:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:29,937 INFO L225 Difference]: With dead ends: 3468 [2021-03-11 00:25:29,937 INFO L226 Difference]: Without dead ends: 3395 [2021-03-11 00:25:29,938 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 3075.6ms TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:25:29,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-03-11 00:25:29,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 1827. [2021-03-11 00:25:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.4342825848849947) internal successors, (6271), 1826 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6271 transitions. [2021-03-11 00:25:29,967 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6271 transitions. Word has length 26 [2021-03-11 00:25:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:29,967 INFO L480 AbstractCegarLoop]: Abstraction has 1827 states and 6271 transitions. [2021-03-11 00:25:29,967 INFO L481 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) [2021-03-11 00:25:29,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6271 transitions. [2021-03-11 00:25:29,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:29,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:29,970 INFO L519 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] [2021-03-11 00:25:30,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:30,170 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:30,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1345416738, now seen corresponding path program 50 times [2021-03-11 00:25:30,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:30,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646565845] [2021-03-11 00:25:30,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:30,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646565845] [2021-03-11 00:25:30,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590470575] [2021-03-11 00:25:30,366 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 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 [2021-03-11 00:25:30,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:25:30,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:30,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:25:30,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:30,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:30,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:30,658 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 [2021-03-11 00:25:30,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:30,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:30,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:30,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:120 [2021-03-11 00:25:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:30,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:30,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:25:30,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991412713] [2021-03-11 00:25:30,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:25:30,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:25:30,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:25:30,888 INFO L87 Difference]: Start difference. First operand 1827 states and 6271 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) [2021-03-11 00:25:32,718 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-11 00:25:33,895 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-03-11 00:25:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:34,294 INFO L93 Difference]: Finished difference Result 2596 states and 8537 transitions. [2021-03-11 00:25:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:25:34,295 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 [2021-03-11 00:25:34,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:34,299 INFO L225 Difference]: With dead ends: 2596 [2021-03-11 00:25:34,299 INFO L226 Difference]: Without dead ends: 2581 [2021-03-11 00:25:34,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2681.4ms TimeCoverageRelationStatistics Valid=391, Invalid=2365, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:25:34,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-03-11 00:25:34,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 1845. [2021-03-11 00:25:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 3.4322125813449023) internal successors, (6329), 1844 states have internal predecessors, (6329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:34,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 6329 transitions. [2021-03-11 00:25:34,325 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 6329 transitions. Word has length 26 [2021-03-11 00:25:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:34,325 INFO L480 AbstractCegarLoop]: Abstraction has 1845 states and 6329 transitions. [2021-03-11 00:25:34,325 INFO L481 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) [2021-03-11 00:25:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 6329 transitions. [2021-03-11 00:25:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:34,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:34,328 INFO L519 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] [2021-03-11 00:25:34,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:34,528 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:34,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:34,529 INFO L82 PathProgramCache]: Analyzing trace with hash 294836038, now seen corresponding path program 51 times [2021-03-11 00:25:34,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:34,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927405213] [2021-03-11 00:25:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:34,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927405213] [2021-03-11 00:25:34,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326921845] [2021-03-11 00:25:34,698 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 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 [2021-03-11 00:25:34,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:25:34,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:34,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-11 00:25:34,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:34,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:34,900 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 [2021-03-11 00:25:34,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:34,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:34,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:34,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:77 [2021-03-11 00:25:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:35,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:35,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-03-11 00:25:35,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098112956] [2021-03-11 00:25:35,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:35,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:35,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:35,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:35,078 INFO L87 Difference]: Start difference. First operand 1845 states and 6329 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) [2021-03-11 00:25:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:37,381 INFO L93 Difference]: Finished difference Result 2945 states and 9563 transitions. [2021-03-11 00:25:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:25:37,382 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 [2021-03-11 00:25:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:37,387 INFO L225 Difference]: With dead ends: 2945 [2021-03-11 00:25:37,387 INFO L226 Difference]: Without dead ends: 2930 [2021-03-11 00:25:37,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1749.8ms TimeCoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:25:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-03-11 00:25:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 1841. [2021-03-11 00:25:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.429891304347826) internal successors, (6311), 1840 states have internal predecessors, (6311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6311 transitions. [2021-03-11 00:25:37,413 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6311 transitions. Word has length 26 [2021-03-11 00:25:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:37,414 INFO L480 AbstractCegarLoop]: Abstraction has 1841 states and 6311 transitions. [2021-03-11 00:25:37,414 INFO L481 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) [2021-03-11 00:25:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6311 transitions. [2021-03-11 00:25:37,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:37,416 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:37,416 INFO L519 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] [2021-03-11 00:25:37,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-03-11 00:25:37,617 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:37,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:37,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 52 times [2021-03-11 00:25:37,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:37,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218319256] [2021-03-11 00:25:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:37,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218319256] [2021-03-11 00:25:37,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067173126] [2021-03-11 00:25:37,785 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 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 [2021-03-11 00:25:37,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:25:37,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:37,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:25:37,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:37,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:37,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:37,957 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 [2021-03-11 00:25:37,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:25:37,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:37,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:37,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-03-11 00:25:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:38,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:38,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:25:38,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143907172] [2021-03-11 00:25:38,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:25:38,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:38,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:25:38,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:25:38,028 INFO L87 Difference]: Start difference. First operand 1841 states and 6311 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) [2021-03-11 00:25:39,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:39,114 INFO L93 Difference]: Finished difference Result 2554 states and 8486 transitions. [2021-03-11 00:25:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:25:39,114 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 [2021-03-11 00:25:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:39,119 INFO L225 Difference]: With dead ends: 2554 [2021-03-11 00:25:39,119 INFO L226 Difference]: Without dead ends: 2529 [2021-03-11 00:25:39,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 719.5ms TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:25:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-03-11 00:25:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1829. [2021-03-11 00:25:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 3.4343544857768054) internal successors, (6278), 1828 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 6278 transitions. [2021-03-11 00:25:39,145 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 6278 transitions. Word has length 26 [2021-03-11 00:25:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:39,145 INFO L480 AbstractCegarLoop]: Abstraction has 1829 states and 6278 transitions. [2021-03-11 00:25:39,146 INFO L481 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) [2021-03-11 00:25:39,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 6278 transitions. [2021-03-11 00:25:39,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:39,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:39,148 INFO L519 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] [2021-03-11 00:25:39,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-03-11 00:25:39,362 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:39,362 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-03-11 00:25:39,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:39,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998241483] [2021-03-11 00:25:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:39,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998241483] [2021-03-11 00:25:39,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237956185] [2021-03-11 00:25:39,571 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 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 [2021-03-11 00:25:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:39,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:25:39,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:39,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:39,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:39,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:39,793 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 [2021-03-11 00:25:39,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:39,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:39,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:39,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:25:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:39,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:39,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:25:39,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908253392] [2021-03-11 00:25:39,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:25:39,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:39,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:25:39,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:25:39,824 INFO L87 Difference]: Start difference. First operand 1829 states and 6278 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) [2021-03-11 00:25:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:41,286 INFO L93 Difference]: Finished difference Result 2460 states and 8152 transitions. [2021-03-11 00:25:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:25:41,286 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 [2021-03-11 00:25:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:41,291 INFO L225 Difference]: With dead ends: 2460 [2021-03-11 00:25:41,291 INFO L226 Difference]: Without dead ends: 2438 [2021-03-11 00:25:41,291 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1128.0ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:25:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-03-11 00:25:41,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1826. [2021-03-11 00:25:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.433972602739726) internal successors, (6267), 1825 states have internal predecessors, (6267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6267 transitions. [2021-03-11 00:25:41,316 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6267 transitions. Word has length 26 [2021-03-11 00:25:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:41,316 INFO L480 AbstractCegarLoop]: Abstraction has 1826 states and 6267 transitions. [2021-03-11 00:25:41,316 INFO L481 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) [2021-03-11 00:25:41,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6267 transitions. [2021-03-11 00:25:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:41,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:41,319 INFO L519 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] [2021-03-11 00:25:41,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-03-11 00:25:41,519 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:41,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:41,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-03-11 00:25:41,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:41,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700478661] [2021-03-11 00:25:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700478661] [2021-03-11 00:25:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169654106] [2021-03-11 00:25:41,737 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 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 [2021-03-11 00:25:41,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:25:41,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:41,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:25:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:41,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:41,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:41,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:41,976 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 [2021-03-11 00:25:41,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:41,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:41,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:41,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-03-11 00:25:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:42,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:42,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:25:42,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113589114] [2021-03-11 00:25:42,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:25:42,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:42,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:25:42,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:25:42,023 INFO L87 Difference]: Start difference. First operand 1826 states and 6267 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) 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) [2021-03-11 00:25:43,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:43,520 INFO L93 Difference]: Finished difference Result 2532 states and 8399 transitions. [2021-03-11 00:25:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:25:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) 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 26 [2021-03-11 00:25:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:43,526 INFO L225 Difference]: With dead ends: 2532 [2021-03-11 00:25:43,526 INFO L226 Difference]: Without dead ends: 2513 [2021-03-11 00:25:43,526 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1305.7ms TimeCoverageRelationStatistics Valid=293, Invalid=1039, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:25:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-03-11 00:25:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1829. [2021-03-11 00:25:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 3.435995623632385) internal successors, (6281), 1828 states have internal predecessors, (6281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 6281 transitions. [2021-03-11 00:25:43,550 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 6281 transitions. Word has length 26 [2021-03-11 00:25:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:43,550 INFO L480 AbstractCegarLoop]: Abstraction has 1829 states and 6281 transitions. [2021-03-11 00:25:43,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) 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) [2021-03-11 00:25:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 6281 transitions. [2021-03-11 00:25:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:43,552 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:43,552 INFO L519 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] [2021-03-11 00:25:43,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:43,753 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:43,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:43,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1211067586, now seen corresponding path program 63 times [2021-03-11 00:25:43,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:43,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136439619] [2021-03-11 00:25:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136439619] [2021-03-11 00:25:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870701113] [2021-03-11 00:25:43,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:25:44,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:25:44,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:44,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:25:44,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:44,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:44,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:44,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:44,157 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 [2021-03-11 00:25:44,164 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:25:44,192 INFO L628 ElimStorePlain]: treesize reduction 17, result has 55.3 percent of original size [2021-03-11 00:25:44,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:44,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-03-11 00:25:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:44,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:44,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:25:44,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543678306] [2021-03-11 00:25:44,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:25:44,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:44,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:25:44,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:25:44,258 INFO L87 Difference]: Start difference. First operand 1829 states and 6281 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) [2021-03-11 00:25:45,842 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-11 00:25:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:45,965 INFO L93 Difference]: Finished difference Result 2965 states and 9658 transitions. [2021-03-11 00:25:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:25:45,965 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 [2021-03-11 00:25:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:45,971 INFO L225 Difference]: With dead ends: 2965 [2021-03-11 00:25:45,971 INFO L226 Difference]: Without dead ends: 2921 [2021-03-11 00:25:45,971 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1509.5ms TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:25:45,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-03-11 00:25:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1870. [2021-03-11 00:25:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.431246655965757) internal successors, (6413), 1869 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6413 transitions. [2021-03-11 00:25:46,001 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6413 transitions. Word has length 26 [2021-03-11 00:25:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:46,001 INFO L480 AbstractCegarLoop]: Abstraction has 1870 states and 6413 transitions. [2021-03-11 00:25:46,001 INFO L481 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) [2021-03-11 00:25:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6413 transitions. [2021-03-11 00:25:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:46,004 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:46,004 INFO L519 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] [2021-03-11 00:25:46,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-03-11 00:25:46,205 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:46,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1633671286, now seen corresponding path program 53 times [2021-03-11 00:25:46,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:46,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375620815] [2021-03-11 00:25:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:46,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375620815] [2021-03-11 00:25:46,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611647952] [2021-03-11 00:25:46,429 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 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 [2021-03-11 00:25:46,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:25:46,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:46,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:25:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:46,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:46,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:25:46,760 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 [2021-03-11 00:25:46,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:46,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:46,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:46,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:25:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:46,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:46,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:25:46,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789462751] [2021-03-11 00:25:46,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:25:46,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:46,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:25:46,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:25:46,795 INFO L87 Difference]: Start difference. First operand 1870 states and 6413 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:25:47,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:47,637 INFO L93 Difference]: Finished difference Result 2376 states and 7962 transitions. [2021-03-11 00:25:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:25:47,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 [2021-03-11 00:25:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:47,642 INFO L225 Difference]: With dead ends: 2376 [2021-03-11 00:25:47,642 INFO L226 Difference]: Without dead ends: 2361 [2021-03-11 00:25:47,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 750.9ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:25:47,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-03-11 00:25:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1867. [2021-03-11 00:25:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.4260450160771705) internal successors, (6393), 1866 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:47,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6393 transitions. [2021-03-11 00:25:47,662 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6393 transitions. Word has length 26 [2021-03-11 00:25:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:47,663 INFO L480 AbstractCegarLoop]: Abstraction has 1867 states and 6393 transitions. [2021-03-11 00:25:47,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:25:47,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6393 transitions. [2021-03-11 00:25:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:47,665 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:47,665 INFO L519 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] [2021-03-11 00:25:47,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:47,865 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:47,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:47,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 54 times [2021-03-11 00:25:47,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:47,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15058308] [2021-03-11 00:25:47,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:48,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15058308] [2021-03-11 00:25:48,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848474772] [2021-03-11 00:25:48,039 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 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 [2021-03-11 00:25:48,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:25:48,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:48,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:25:48,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:48,258 INFO L354 Elim1Store]: treesize reduction 35, result has 36.4 percent of original size [2021-03-11 00:25:48,259 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 76 treesize of output 67 [2021-03-11 00:25:48,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:48,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:48,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:48,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:35 [2021-03-11 00:25:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:48,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:48,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:25:48,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197812849] [2021-03-11 00:25:48,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:25:48,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:48,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:25:48,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:25:48,381 INFO L87 Difference]: Start difference. First operand 1867 states and 6393 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) [2021-03-11 00:25:50,013 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-03-11 00:25:50,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:50,980 INFO L93 Difference]: Finished difference Result 2818 states and 9211 transitions. [2021-03-11 00:25:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:25:50,981 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 [2021-03-11 00:25:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:50,985 INFO L225 Difference]: With dead ends: 2818 [2021-03-11 00:25:50,985 INFO L226 Difference]: Without dead ends: 2753 [2021-03-11 00:25:50,986 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1892.8ms TimeCoverageRelationStatistics Valid=355, Invalid=1901, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:25:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-03-11 00:25:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 1890. [2021-03-11 00:25:51,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4187400741132876) internal successors, (6458), 1889 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6458 transitions. [2021-03-11 00:25:51,012 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6458 transitions. Word has length 26 [2021-03-11 00:25:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:51,012 INFO L480 AbstractCegarLoop]: Abstraction has 1890 states and 6458 transitions. [2021-03-11 00:25:51,012 INFO L481 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) [2021-03-11 00:25:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6458 transitions. [2021-03-11 00:25:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:51,014 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:51,014 INFO L519 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] [2021-03-11 00:25:51,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-03-11 00:25:51,215 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash -322804878, now seen corresponding path program 55 times [2021-03-11 00:25:51,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:51,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299277383] [2021-03-11 00:25:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:51,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299277383] [2021-03-11 00:25:51,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516569436] [2021-03-11 00:25:51,384 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 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 [2021-03-11 00:25:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:51,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:25:51,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:51,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:51,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:51,571 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 [2021-03-11 00:25:51,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:25:51,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:51,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:51,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-03-11 00:25:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:51,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:51,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:25:51,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499387567] [2021-03-11 00:25:51,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:51,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:51,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:51,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:51,643 INFO L87 Difference]: Start difference. First operand 1890 states and 6458 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) [2021-03-11 00:25:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:53,026 INFO L93 Difference]: Finished difference Result 2691 states and 8967 transitions. [2021-03-11 00:25:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:25:53,027 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 [2021-03-11 00:25:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:53,032 INFO L225 Difference]: With dead ends: 2691 [2021-03-11 00:25:53,032 INFO L226 Difference]: Without dead ends: 2676 [2021-03-11 00:25:53,032 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1036.5ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:25:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-03-11 00:25:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1879. [2021-03-11 00:25:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4222577209797658) internal successors, (6427), 1878 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6427 transitions. [2021-03-11 00:25:53,057 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6427 transitions. Word has length 26 [2021-03-11 00:25:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:53,058 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6427 transitions. [2021-03-11 00:25:53,058 INFO L481 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) [2021-03-11 00:25:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6427 transitions. [2021-03-11 00:25:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:53,060 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:53,060 INFO L519 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] [2021-03-11 00:25:53,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-03-11 00:25:53,261 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:53,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:53,261 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 56 times [2021-03-11 00:25:53,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:53,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663134736] [2021-03-11 00:25:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:53,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663134736] [2021-03-11 00:25:53,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731052644] [2021-03-11 00:25:53,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:25:53,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:25:53,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:53,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:25:53,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:53,677 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-03-11 00:25:53,678 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 [2021-03-11 00:25:53,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:53,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:53,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:53,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-03-11 00:25:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:53,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:53,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:25:53,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336248033] [2021-03-11 00:25:53,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:53,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:53,754 INFO L87 Difference]: Start difference. First operand 1879 states and 6427 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) [2021-03-11 00:25:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:54,919 INFO L93 Difference]: Finished difference Result 2580 states and 8592 transitions. [2021-03-11 00:25:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:25:54,920 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 [2021-03-11 00:25:54,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:54,924 INFO L225 Difference]: With dead ends: 2580 [2021-03-11 00:25:54,924 INFO L226 Difference]: Without dead ends: 2544 [2021-03-11 00:25:54,924 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 949.7ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:25:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-03-11 00:25:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1879. [2021-03-11 00:25:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4222577209797658) internal successors, (6427), 1878 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6427 transitions. [2021-03-11 00:25:54,948 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6427 transitions. Word has length 26 [2021-03-11 00:25:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:54,948 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6427 transitions. [2021-03-11 00:25:54,948 INFO L481 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) [2021-03-11 00:25:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6427 transitions. [2021-03-11 00:25:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:54,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:54,951 INFO L519 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] [2021-03-11 00:25:55,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-03-11 00:25:55,155 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:55,156 INFO L82 PathProgramCache]: Analyzing trace with hash -89207746, now seen corresponding path program 64 times [2021-03-11 00:25:55,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:55,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489118227] [2021-03-11 00:25:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:55,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489118227] [2021-03-11 00:25:55,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333907622] [2021-03-11 00:25:55,428 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 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 [2021-03-11 00:25:55,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:25:55,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:55,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:25:55,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:55,696 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-03-11 00:25:55,696 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 56 [2021-03-11 00:25:55,702 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:55,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:55,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:55,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:87, output treesize:10 [2021-03-11 00:25:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:55,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:55,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:25:55,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7670059] [2021-03-11 00:25:55,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:25:55,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:55,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:25:55,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:25:55,744 INFO L87 Difference]: Start difference. First operand 1879 states and 6427 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) [2021-03-11 00:25:57,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:57,113 INFO L93 Difference]: Finished difference Result 2397 states and 7991 transitions. [2021-03-11 00:25:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:25:57,114 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 [2021-03-11 00:25:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:57,118 INFO L225 Difference]: With dead ends: 2397 [2021-03-11 00:25:57,118 INFO L226 Difference]: Without dead ends: 2382 [2021-03-11 00:25:57,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1227.0ms TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:25:57,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-03-11 00:25:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1879. [2021-03-11 00:25:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4222577209797658) internal successors, (6427), 1878 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6427 transitions. [2021-03-11 00:25:57,141 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6427 transitions. Word has length 26 [2021-03-11 00:25:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:57,142 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6427 transitions. [2021-03-11 00:25:57,142 INFO L481 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) [2021-03-11 00:25:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6427 transitions. [2021-03-11 00:25:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:25:57,144 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:57,144 INFO L519 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] [2021-03-11 00:25:57,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:57,345 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:57,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:57,345 INFO L82 PathProgramCache]: Analyzing trace with hash -63112514, now seen corresponding path program 65 times [2021-03-11 00:25:57,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:57,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101165350] [2021-03-11 00:25:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:57,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101165350] [2021-03-11 00:25:57,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260733282] [2021-03-11 00:25:57,539 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 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 [2021-03-11 00:25:57,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:25:57,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:57,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:25:57,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:57,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:57,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:25:57,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:57,732 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 [2021-03-11 00:25:57,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-11 00:25:57,769 INFO L628 ElimStorePlain]: treesize reduction 24, result has 46.7 percent of original size [2021-03-11 00:25:57,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:57,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-03-11 00:25:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:57,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:57,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:25:57,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358397044] [2021-03-11 00:25:57,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:25:57,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:57,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:25:57,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:25:57,837 INFO L87 Difference]: Start difference. First operand 1879 states and 6427 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) [2021-03-11 00:25:58,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:58,958 INFO L93 Difference]: Finished difference Result 2617 states and 8669 transitions. [2021-03-11 00:25:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:25:58,959 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 [2021-03-11 00:25:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:58,962 INFO L225 Difference]: With dead ends: 2617 [2021-03-11 00:25:58,963 INFO L226 Difference]: Without dead ends: 2587 [2021-03-11 00:25:58,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 894.5ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:25:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-03-11 00:25:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1866. [2021-03-11 00:25:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.4176943699731903) internal successors, (6374), 1865 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6374 transitions. [2021-03-11 00:25:58,986 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6374 transitions. Word has length 26 [2021-03-11 00:25:58,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:58,987 INFO L480 AbstractCegarLoop]: Abstraction has 1866 states and 6374 transitions. [2021-03-11 00:25:58,987 INFO L481 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) [2021-03-11 00:25:58,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6374 transitions. [2021-03-11 00:25:58,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:25:58,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:58,989 INFO L519 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] [2021-03-11 00:25:59,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:59,189 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:59,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:59,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 57 times [2021-03-11 00:25:59,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:59,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391031891] [2021-03-11 00:25:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:59,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391031891] [2021-03-11 00:25:59,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921462569] [2021-03-11 00:25:59,261 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 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 [2021-03-11 00:25:59,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:25:59,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:59,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:25:59,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:59,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:59,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:25:59,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259560911] [2021-03-11 00:25:59,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:25:59,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:59,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:25:59,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:25:59,447 INFO L87 Difference]: Start difference. First operand 1866 states and 6374 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) [2021-03-11 00:26:00,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:00,732 INFO L93 Difference]: Finished difference Result 4807 states and 14882 transitions. [2021-03-11 00:26:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:26:00,733 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 [2021-03-11 00:26:00,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:00,740 INFO L225 Difference]: With dead ends: 4807 [2021-03-11 00:26:00,740 INFO L226 Difference]: Without dead ends: 4807 [2021-03-11 00:26:00,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 759.6ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:26:00,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-03-11 00:26:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 2064. [2021-03-11 00:26:00,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 3.4755210857973826) internal successors, (7170), 2063 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 7170 transitions. [2021-03-11 00:26:00,777 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 7170 transitions. Word has length 28 [2021-03-11 00:26:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:00,777 INFO L480 AbstractCegarLoop]: Abstraction has 2064 states and 7170 transitions. [2021-03-11 00:26:00,777 INFO L481 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) [2021-03-11 00:26:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 7170 transitions. [2021-03-11 00:26:00,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:00,780 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:00,780 INFO L519 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] [2021-03-11 00:26:00,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:00,980 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:00,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 58 times [2021-03-11 00:26:00,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:00,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453219404] [2021-03-11 00:26:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:01,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453219404] [2021-03-11 00:26:01,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310967107] [2021-03-11 00:26:01,061 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 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 [2021-03-11 00:26:01,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:26:01,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:01,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:01,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:26:01,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106534358] [2021-03-11 00:26:01,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:26:01,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:01,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:26:01,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:26:01,251 INFO L87 Difference]: Start difference. First operand 2064 states and 7170 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) [2021-03-11 00:26:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:02,980 INFO L93 Difference]: Finished difference Result 6392 states and 19484 transitions. [2021-03-11 00:26:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-11 00:26:02,981 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 [2021-03-11 00:26:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:02,992 INFO L225 Difference]: With dead ends: 6392 [2021-03-11 00:26:02,992 INFO L226 Difference]: Without dead ends: 6392 [2021-03-11 00:26:02,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 1049.0ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-03-11 00:26:02,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6392 states. [2021-03-11 00:26:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6392 to 2078. [2021-03-11 00:26:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 3.4848338950409246) internal successors, (7238), 2077 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 7238 transitions. [2021-03-11 00:26:03,039 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 7238 transitions. Word has length 28 [2021-03-11 00:26:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:03,039 INFO L480 AbstractCegarLoop]: Abstraction has 2078 states and 7238 transitions. [2021-03-11 00:26:03,040 INFO L481 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) [2021-03-11 00:26:03,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 7238 transitions. [2021-03-11 00:26:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:03,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:03,042 INFO L519 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] [2021-03-11 00:26:03,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-03-11 00:26:03,243 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:03,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 59 times [2021-03-11 00:26:03,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:03,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319377006] [2021-03-11 00:26:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:03,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319377006] [2021-03-11 00:26:03,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025310828] [2021-03-11 00:26:03,300 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 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 [2021-03-11 00:26:03,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:26:03,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:03,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:03,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:03,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:03,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:26:03,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599689618] [2021-03-11 00:26:03,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:26:03,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:03,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:26:03,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:26:03,484 INFO L87 Difference]: Start difference. First operand 2078 states and 7238 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) [2021-03-11 00:26:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:05,284 INFO L93 Difference]: Finished difference Result 5781 states and 18006 transitions. [2021-03-11 00:26:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-11 00:26:05,285 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 [2021-03-11 00:26:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:05,295 INFO L225 Difference]: With dead ends: 5781 [2021-03-11 00:26:05,295 INFO L226 Difference]: Without dead ends: 5781 [2021-03-11 00:26:05,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 1016.1ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-03-11 00:26:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5781 states. [2021-03-11 00:26:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5781 to 2023. [2021-03-11 00:26:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.4579624134520275) internal successors, (6992), 2022 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6992 transitions. [2021-03-11 00:26:05,340 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6992 transitions. Word has length 28 [2021-03-11 00:26:05,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:05,340 INFO L480 AbstractCegarLoop]: Abstraction has 2023 states and 6992 transitions. [2021-03-11 00:26:05,340 INFO L481 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) [2021-03-11 00:26:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6992 transitions. [2021-03-11 00:26:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:05,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:05,343 INFO L519 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] [2021-03-11 00:26:05,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:05,543 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:05,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:05,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 60 times [2021-03-11 00:26:05,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:05,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121875983] [2021-03-11 00:26:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:05,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121875983] [2021-03-11 00:26:05,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919341416] [2021-03-11 00:26:05,602 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 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 [2021-03-11 00:26:05,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:26:05,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:05,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:05,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:05,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:26:05,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732224178] [2021-03-11 00:26:05,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:26:05,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:05,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:26:05,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:26:05,774 INFO L87 Difference]: Start difference. First operand 2023 states and 6992 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) [2021-03-11 00:26:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:07,255 INFO L93 Difference]: Finished difference Result 4893 states and 15049 transitions. [2021-03-11 00:26:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:26:07,256 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 [2021-03-11 00:26:07,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:07,264 INFO L225 Difference]: With dead ends: 4893 [2021-03-11 00:26:07,264 INFO L226 Difference]: Without dead ends: 4893 [2021-03-11 00:26:07,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 890.8ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-03-11 00:26:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4893 states. [2021-03-11 00:26:07,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4893 to 2033. [2021-03-11 00:26:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.453740157480315) internal successors, (7018), 2032 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:07,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7018 transitions. [2021-03-11 00:26:07,303 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7018 transitions. Word has length 28 [2021-03-11 00:26:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:07,303 INFO L480 AbstractCegarLoop]: Abstraction has 2033 states and 7018 transitions. [2021-03-11 00:26:07,303 INFO L481 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) [2021-03-11 00:26:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7018 transitions. [2021-03-11 00:26:07,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:07,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:07,306 INFO L519 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] [2021-03-11 00:26:07,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:07,507 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:07,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:07,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 66 times [2021-03-11 00:26:07,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:07,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353121133] [2021-03-11 00:26:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:07,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353121133] [2021-03-11 00:26:07,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890415720] [2021-03-11 00:26:07,584 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 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 [2021-03-11 00:26:07,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:26:07,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:07,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:07,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:07,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:07,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:26:07,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168146083] [2021-03-11 00:26:07,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:26:07,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:07,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:26:07,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:26:07,750 INFO L87 Difference]: Start difference. First operand 2033 states and 7018 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) [2021-03-11 00:26:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:08,641 INFO L93 Difference]: Finished difference Result 4312 states and 13444 transitions. [2021-03-11 00:26:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:26:08,641 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 [2021-03-11 00:26:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:08,649 INFO L225 Difference]: With dead ends: 4312 [2021-03-11 00:26:08,649 INFO L226 Difference]: Without dead ends: 4312 [2021-03-11 00:26:08,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:26:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-03-11 00:26:08,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 2089. [2021-03-11 00:26:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 3.439176245210728) internal successors, (7181), 2088 states have internal predecessors, (7181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 7181 transitions. [2021-03-11 00:26:08,685 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 7181 transitions. Word has length 28 [2021-03-11 00:26:08,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:08,686 INFO L480 AbstractCegarLoop]: Abstraction has 2089 states and 7181 transitions. [2021-03-11 00:26:08,686 INFO L481 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) [2021-03-11 00:26:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 7181 transitions. [2021-03-11 00:26:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:08,688 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:08,688 INFO L519 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] [2021-03-11 00:26:08,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:08,898 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 61 times [2021-03-11 00:26:08,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:08,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985146019] [2021-03-11 00:26:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:26:08,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985146019] [2021-03-11 00:26:08,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361601096] [2021-03-11 00:26:08,938 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 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 [2021-03-11 00:26:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:08,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:26:08,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:26:09,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:09,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:26:09,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026925639] [2021-03-11 00:26:09,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:26:09,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:09,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:26:09,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:26:09,063 INFO L87 Difference]: Start difference. First operand 2089 states and 7181 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) [2021-03-11 00:26:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:09,313 INFO L93 Difference]: Finished difference Result 3577 states and 11658 transitions. [2021-03-11 00:26:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:26:09,314 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 [2021-03-11 00:26:09,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:09,321 INFO L225 Difference]: With dead ends: 3577 [2021-03-11 00:26:09,321 INFO L226 Difference]: Without dead ends: 3553 [2021-03-11 00:26:09,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:26:09,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-03-11 00:26:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2470. [2021-03-11 00:26:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.5107330903199676) internal successors, (8668), 2469 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8668 transitions. [2021-03-11 00:26:09,357 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8668 transitions. Word has length 28 [2021-03-11 00:26:09,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:09,357 INFO L480 AbstractCegarLoop]: Abstraction has 2470 states and 8668 transitions. [2021-03-11 00:26:09,357 INFO L481 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) [2021-03-11 00:26:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8668 transitions. [2021-03-11 00:26:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:09,360 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:09,360 INFO L519 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] [2021-03-11 00:26:09,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:09,561 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:09,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:09,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 62 times [2021-03-11 00:26:09,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:09,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916968378] [2021-03-11 00:26:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:09,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916968378] [2021-03-11 00:26:09,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237877499] [2021-03-11 00:26:09,614 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 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 [2021-03-11 00:26:09,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:26:09,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:09,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:26:09,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:09,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:09,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:26:09,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015380149] [2021-03-11 00:26:09,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:26:09,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:09,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:26:09,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:26:09,772 INFO L87 Difference]: Start difference. First operand 2470 states and 8668 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) [2021-03-11 00:26:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:10,682 INFO L93 Difference]: Finished difference Result 4198 states and 13424 transitions. [2021-03-11 00:26:10,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:26:10,683 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 [2021-03-11 00:26:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:10,690 INFO L225 Difference]: With dead ends: 4198 [2021-03-11 00:26:10,690 INFO L226 Difference]: Without dead ends: 4151 [2021-03-11 00:26:10,690 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:26:10,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-03-11 00:26:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 2635. [2021-03-11 00:26:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 3.5292331055429007) internal successors, (9296), 2634 states have internal predecessors, (9296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 9296 transitions. [2021-03-11 00:26:10,732 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 9296 transitions. Word has length 28 [2021-03-11 00:26:10,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:10,732 INFO L480 AbstractCegarLoop]: Abstraction has 2635 states and 9296 transitions. [2021-03-11 00:26:10,732 INFO L481 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) [2021-03-11 00:26:10,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 9296 transitions. [2021-03-11 00:26:10,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:10,735 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:10,735 INFO L519 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] [2021-03-11 00:26:10,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-03-11 00:26:10,939 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:10,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:10,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1904037996, now seen corresponding path program 67 times [2021-03-11 00:26:10,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:10,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298430396] [2021-03-11 00:26:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:11,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298430396] [2021-03-11 00:26:11,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800439958] [2021-03-11 00:26:11,003 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 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 [2021-03-11 00:26:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:11,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:11,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:11,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-11 00:26:11,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120105539] [2021-03-11 00:26:11,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:26:11,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:11,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:26:11,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:26:11,192 INFO L87 Difference]: Start difference. First operand 2635 states and 9296 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) [2021-03-11 00:26:11,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:11,844 INFO L93 Difference]: Finished difference Result 5078 states and 16878 transitions. [2021-03-11 00:26:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:26:11,845 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 [2021-03-11 00:26:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:11,872 INFO L225 Difference]: With dead ends: 5078 [2021-03-11 00:26:11,873 INFO L226 Difference]: Without dead ends: 4991 [2021-03-11 00:26:11,873 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 494.9ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:26:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2021-03-11 00:26:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 3295. [2021-03-11 00:26:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 3.5491803278688523) internal successors, (11691), 3294 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11691 transitions. [2021-03-11 00:26:11,930 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11691 transitions. Word has length 28 [2021-03-11 00:26:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:11,930 INFO L480 AbstractCegarLoop]: Abstraction has 3295 states and 11691 transitions. [2021-03-11 00:26:11,930 INFO L481 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) [2021-03-11 00:26:11,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11691 transitions. [2021-03-11 00:26:11,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:11,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:11,935 INFO L519 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] [2021-03-11 00:26:12,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-03-11 00:26:12,147 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:12,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 63 times [2021-03-11 00:26:12,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:12,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026061961] [2021-03-11 00:26:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:12,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026061961] [2021-03-11 00:26:12,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497666292] [2021-03-11 00:26:12,203 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 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 [2021-03-11 00:26:12,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:26:12,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:12,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:26:12,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:12,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:12,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:26:12,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654691061] [2021-03-11 00:26:12,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:26:12,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:12,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:26:12,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:26:12,377 INFO L87 Difference]: Start difference. First operand 3295 states and 11691 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) [2021-03-11 00:26:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:13,421 INFO L93 Difference]: Finished difference Result 5501 states and 17502 transitions. [2021-03-11 00:26:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:26:13,422 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 [2021-03-11 00:26:13,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:13,432 INFO L225 Difference]: With dead ends: 5501 [2021-03-11 00:26:13,432 INFO L226 Difference]: Without dead ends: 5475 [2021-03-11 00:26:13,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:26:13,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2021-03-11 00:26:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 3313. [2021-03-11 00:26:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 3.5543478260869565) internal successors, (11772), 3312 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 11772 transitions. [2021-03-11 00:26:13,513 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 11772 transitions. Word has length 28 [2021-03-11 00:26:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:13,513 INFO L480 AbstractCegarLoop]: Abstraction has 3313 states and 11772 transitions. [2021-03-11 00:26:13,514 INFO L481 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) [2021-03-11 00:26:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 11772 transitions. [2021-03-11 00:26:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:13,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:13,518 INFO L519 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] [2021-03-11 00:26:13,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:13,718 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:13,719 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 64 times [2021-03-11 00:26:13,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:13,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153289307] [2021-03-11 00:26:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:13,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153289307] [2021-03-11 00:26:13,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706039658] [2021-03-11 00:26:13,769 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 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 [2021-03-11 00:26:13,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:26:13,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:13,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:26:13,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:13,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:13,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:26:13,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112054151] [2021-03-11 00:26:13,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:26:13,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:13,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:26:13,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:26:13,939 INFO L87 Difference]: Start difference. First operand 3313 states and 11772 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) [2021-03-11 00:26:14,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:14,997 INFO L93 Difference]: Finished difference Result 5556 states and 17694 transitions. [2021-03-11 00:26:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:26:14,998 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 [2021-03-11 00:26:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:15,008 INFO L225 Difference]: With dead ends: 5556 [2021-03-11 00:26:15,008 INFO L226 Difference]: Without dead ends: 5525 [2021-03-11 00:26:15,008 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:26:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-03-11 00:26:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 3306. [2021-03-11 00:26:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3305 states have (on average 3.5606656580937974) internal successors, (11768), 3305 states have internal predecessors, (11768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 11768 transitions. [2021-03-11 00:26:15,070 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 11768 transitions. Word has length 28 [2021-03-11 00:26:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:15,071 INFO L480 AbstractCegarLoop]: Abstraction has 3306 states and 11768 transitions. [2021-03-11 00:26:15,071 INFO L481 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) [2021-03-11 00:26:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 11768 transitions. [2021-03-11 00:26:15,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:15,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:15,075 INFO L519 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] [2021-03-11 00:26:15,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-03-11 00:26:15,276 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:15,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:15,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 65 times [2021-03-11 00:26:15,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:15,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870677545] [2021-03-11 00:26:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:15,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870677545] [2021-03-11 00:26:15,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149845846] [2021-03-11 00:26:15,325 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 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 [2021-03-11 00:26:15,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:26:15,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:15,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:26:15,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:15,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:15,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:26:15,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151292386] [2021-03-11 00:26:15,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:26:15,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:15,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:26:15,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:26:15,482 INFO L87 Difference]: Start difference. First operand 3306 states and 11768 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) [2021-03-11 00:26:16,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:16,271 INFO L93 Difference]: Finished difference Result 6732 states and 21804 transitions. [2021-03-11 00:26:16,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:26:16,272 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 [2021-03-11 00:26:16,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:16,282 INFO L225 Difference]: With dead ends: 6732 [2021-03-11 00:26:16,282 INFO L226 Difference]: Without dead ends: 6685 [2021-03-11 00:26:16,283 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:26:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6685 states. [2021-03-11 00:26:16,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6685 to 3469. [2021-03-11 00:26:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3469 states, 3468 states have (on average 3.605824682814302) internal successors, (12505), 3468 states have internal predecessors, (12505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 12505 transitions. [2021-03-11 00:26:16,350 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 12505 transitions. Word has length 28 [2021-03-11 00:26:16,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:16,350 INFO L480 AbstractCegarLoop]: Abstraction has 3469 states and 12505 transitions. [2021-03-11 00:26:16,351 INFO L481 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) [2021-03-11 00:26:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 12505 transitions. [2021-03-11 00:26:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:16,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:16,355 INFO L519 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] [2021-03-11 00:26:16,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-03-11 00:26:16,555 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:16,555 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 66 times [2021-03-11 00:26:16,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:16,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513318121] [2021-03-11 00:26:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:26:16,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513318121] [2021-03-11 00:26:16,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837997434] [2021-03-11 00:26:16,588 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 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 [2021-03-11 00:26:16,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:26:16,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:26:16,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:26:16,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:16,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:26:16,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094052046] [2021-03-11 00:26:16,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:26:16,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:16,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:26:16,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:26:16,706 INFO L87 Difference]: Start difference. First operand 3469 states and 12505 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) [2021-03-11 00:26:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:16,936 INFO L93 Difference]: Finished difference Result 5136 states and 17042 transitions. [2021-03-11 00:26:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:26:16,937 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 [2021-03-11 00:26:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:16,968 INFO L225 Difference]: With dead ends: 5136 [2021-03-11 00:26:16,968 INFO L226 Difference]: Without dead ends: 5136 [2021-03-11 00:26:16,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:26:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5136 states. [2021-03-11 00:26:17,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5136 to 3266. [2021-03-11 00:26:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3265 states have (on average 3.559571209800919) internal successors, (11622), 3265 states have internal predecessors, (11622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:17,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 11622 transitions. [2021-03-11 00:26:17,021 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 11622 transitions. Word has length 28 [2021-03-11 00:26:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:17,021 INFO L480 AbstractCegarLoop]: Abstraction has 3266 states and 11622 transitions. [2021-03-11 00:26:17,021 INFO L481 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) [2021-03-11 00:26:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 11622 transitions. [2021-03-11 00:26:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:17,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:17,025 INFO L519 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] [2021-03-11 00:26:17,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-03-11 00:26:17,226 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 67 times [2021-03-11 00:26:17,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:17,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803431334] [2021-03-11 00:26:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:17,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803431334] [2021-03-11 00:26:17,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856431857] [2021-03-11 00:26:17,278 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 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 [2021-03-11 00:26:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:17,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:17,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:17,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:26:17,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361314585] [2021-03-11 00:26:17,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:26:17,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:17,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:26:17,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:26:17,426 INFO L87 Difference]: Start difference. First operand 3266 states and 11622 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) [2021-03-11 00:26:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:18,398 INFO L93 Difference]: Finished difference Result 7168 states and 22913 transitions. [2021-03-11 00:26:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-11 00:26:18,399 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 [2021-03-11 00:26:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:18,412 INFO L225 Difference]: With dead ends: 7168 [2021-03-11 00:26:18,412 INFO L226 Difference]: Without dead ends: 7168 [2021-03-11 00:26:18,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 570.3ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:26:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7168 states. [2021-03-11 00:26:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7168 to 3296. [2021-03-11 00:26:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3296 states, 3295 states have (on average 3.559028831562974) internal successors, (11727), 3295 states have internal predecessors, (11727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 11727 transitions. [2021-03-11 00:26:18,507 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 11727 transitions. Word has length 28 [2021-03-11 00:26:18,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:18,508 INFO L480 AbstractCegarLoop]: Abstraction has 3296 states and 11727 transitions. [2021-03-11 00:26:18,508 INFO L481 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) [2021-03-11 00:26:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 11727 transitions. [2021-03-11 00:26:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:18,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:18,512 INFO L519 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] [2021-03-11 00:26:18,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:18,713 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:18,713 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 68 times [2021-03-11 00:26:18,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:18,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679520496] [2021-03-11 00:26:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:18,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679520496] [2021-03-11 00:26:18,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716900706] [2021-03-11 00:26:18,766 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 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 [2021-03-11 00:26:18,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:26:18,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:18,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:18,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:18,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:18,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:26:18,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420198892] [2021-03-11 00:26:18,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:26:18,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:18,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:26:18,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:26:18,913 INFO L87 Difference]: Start difference. First operand 3296 states and 11727 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) [2021-03-11 00:26:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:20,107 INFO L93 Difference]: Finished difference Result 7462 states and 23886 transitions. [2021-03-11 00:26:20,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-11 00:26:20,108 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 [2021-03-11 00:26:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:20,122 INFO L225 Difference]: With dead ends: 7462 [2021-03-11 00:26:20,122 INFO L226 Difference]: Without dead ends: 7462 [2021-03-11 00:26:20,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 638.0ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:26:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2021-03-11 00:26:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 3426. [2021-03-11 00:26:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 3.542773722627737) internal successors, (12134), 3425 states have internal predecessors, (12134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 12134 transitions. [2021-03-11 00:26:20,228 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 12134 transitions. Word has length 28 [2021-03-11 00:26:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:20,229 INFO L480 AbstractCegarLoop]: Abstraction has 3426 states and 12134 transitions. [2021-03-11 00:26:20,229 INFO L481 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) [2021-03-11 00:26:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 12134 transitions. [2021-03-11 00:26:20,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:20,233 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:20,233 INFO L519 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] [2021-03-11 00:26:20,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:20,434 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 69 times [2021-03-11 00:26:20,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:20,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951158085] [2021-03-11 00:26:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:20,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951158085] [2021-03-11 00:26:20,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329078737] [2021-03-11 00:26:20,492 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 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 [2021-03-11 00:26:20,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:26:20,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:20,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:26:20,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:20,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:20,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:26:20,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875460081] [2021-03-11 00:26:20,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:26:20,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:20,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:26:20,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:26:20,650 INFO L87 Difference]: Start difference. First operand 3426 states and 12134 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) [2021-03-11 00:26:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:21,581 INFO L93 Difference]: Finished difference Result 7933 states and 25424 transitions. [2021-03-11 00:26:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:26:21,583 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 [2021-03-11 00:26:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:21,597 INFO L225 Difference]: With dead ends: 7933 [2021-03-11 00:26:21,597 INFO L226 Difference]: Without dead ends: 7920 [2021-03-11 00:26:21,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 570.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:26:21,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2021-03-11 00:26:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 4071. [2021-03-11 00:26:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4071 states, 4070 states have (on average 3.5847665847665846) internal successors, (14590), 4070 states have internal predecessors, (14590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4071 states to 4071 states and 14590 transitions. [2021-03-11 00:26:21,689 INFO L78 Accepts]: Start accepts. Automaton has 4071 states and 14590 transitions. Word has length 28 [2021-03-11 00:26:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:21,689 INFO L480 AbstractCegarLoop]: Abstraction has 4071 states and 14590 transitions. [2021-03-11 00:26:21,689 INFO L481 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) [2021-03-11 00:26:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4071 states and 14590 transitions. [2021-03-11 00:26:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:21,695 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:21,695 INFO L519 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] [2021-03-11 00:26:21,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:21,895 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:21,896 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 70 times [2021-03-11 00:26:21,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:21,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981580274] [2021-03-11 00:26:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:21,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981580274] [2021-03-11 00:26:21,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181048148] [2021-03-11 00:26:21,962 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 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 [2021-03-11 00:26:21,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:26:21,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:21,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:26:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:22,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:22,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:26:22,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441714550] [2021-03-11 00:26:22,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:26:22,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:22,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:26:22,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:26:22,111 INFO L87 Difference]: Start difference. First operand 4071 states and 14590 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) [2021-03-11 00:26:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:23,054 INFO L93 Difference]: Finished difference Result 8195 states and 26154 transitions. [2021-03-11 00:26:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:26:23,055 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 [2021-03-11 00:26:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:23,071 INFO L225 Difference]: With dead ends: 8195 [2021-03-11 00:26:23,071 INFO L226 Difference]: Without dead ends: 8195 [2021-03-11 00:26:23,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 582.4ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:26:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8195 states. [2021-03-11 00:26:23,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8195 to 3824. [2021-03-11 00:26:23,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3824 states, 3823 states have (on average 3.550353125817421) internal successors, (13573), 3823 states have internal predecessors, (13573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3824 states to 3824 states and 13573 transitions. [2021-03-11 00:26:23,159 INFO L78 Accepts]: Start accepts. Automaton has 3824 states and 13573 transitions. Word has length 28 [2021-03-11 00:26:23,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:23,159 INFO L480 AbstractCegarLoop]: Abstraction has 3824 states and 13573 transitions. [2021-03-11 00:26:23,159 INFO L481 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) [2021-03-11 00:26:23,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3824 states and 13573 transitions. [2021-03-11 00:26:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:23,164 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:23,164 INFO L519 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] [2021-03-11 00:26:23,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable373 [2021-03-11 00:26:23,364 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:23,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:23,365 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 71 times [2021-03-11 00:26:23,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:23,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504117003] [2021-03-11 00:26:23,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:23,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504117003] [2021-03-11 00:26:23,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188971206] [2021-03-11 00:26:23,417 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 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 [2021-03-11 00:26:23,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:26:23,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:23,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:23,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:23,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:23,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:26:23,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682570603] [2021-03-11 00:26:23,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:26:23,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:23,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:26:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:26:23,559 INFO L87 Difference]: Start difference. First operand 3824 states and 13573 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) [2021-03-11 00:26:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:24,664 INFO L93 Difference]: Finished difference Result 7301 states and 23970 transitions. [2021-03-11 00:26:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-11 00:26:24,665 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 [2021-03-11 00:26:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:24,678 INFO L225 Difference]: With dead ends: 7301 [2021-03-11 00:26:24,678 INFO L226 Difference]: Without dead ends: 7297 [2021-03-11 00:26:24,679 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 613.6ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:26:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7297 states. [2021-03-11 00:26:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7297 to 3457. [2021-03-11 00:26:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3457 states, 3456 states have (on average 3.595775462962963) internal successors, (12427), 3456 states have internal predecessors, (12427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3457 states to 3457 states and 12427 transitions. [2021-03-11 00:26:24,754 INFO L78 Accepts]: Start accepts. Automaton has 3457 states and 12427 transitions. Word has length 28 [2021-03-11 00:26:24,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:24,754 INFO L480 AbstractCegarLoop]: Abstraction has 3457 states and 12427 transitions. [2021-03-11 00:26:24,755 INFO L481 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) [2021-03-11 00:26:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3457 states and 12427 transitions. [2021-03-11 00:26:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:24,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:24,759 INFO L519 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] [2021-03-11 00:26:24,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:24,960 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:24,960 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 72 times [2021-03-11 00:26:24,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:24,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692307010] [2021-03-11 00:26:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:25,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692307010] [2021-03-11 00:26:25,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616415052] [2021-03-11 00:26:25,016 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 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 [2021-03-11 00:26:25,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:26:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:25,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:25,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:25,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:25,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:26:25,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801183700] [2021-03-11 00:26:25,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:26:25,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:25,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:26:25,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:26:25,199 INFO L87 Difference]: Start difference. First operand 3457 states and 12427 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) [2021-03-11 00:26:26,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:26,751 INFO L93 Difference]: Finished difference Result 11600 states and 38331 transitions. [2021-03-11 00:26:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-11 00:26:26,753 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 [2021-03-11 00:26:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:26,772 INFO L225 Difference]: With dead ends: 11600 [2021-03-11 00:26:26,772 INFO L226 Difference]: Without dead ends: 11600 [2021-03-11 00:26:26,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 903.6ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-03-11 00:26:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11600 states. [2021-03-11 00:26:26,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11600 to 3751. [2021-03-11 00:26:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3750 states have (on average 3.6784) internal successors, (13794), 3750 states have internal predecessors, (13794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:26,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 13794 transitions. [2021-03-11 00:26:26,878 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 13794 transitions. Word has length 28 [2021-03-11 00:26:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:26,878 INFO L480 AbstractCegarLoop]: Abstraction has 3751 states and 13794 transitions. [2021-03-11 00:26:26,879 INFO L481 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) [2021-03-11 00:26:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 13794 transitions. [2021-03-11 00:26:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:26,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:26,883 INFO L519 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] [2021-03-11 00:26:27,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-03-11 00:26:27,084 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:27,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:27,084 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 73 times [2021-03-11 00:26:27,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:27,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119808157] [2021-03-11 00:26:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:27,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119808157] [2021-03-11 00:26:27,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149556057] [2021-03-11 00:26:27,151 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 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 [2021-03-11 00:26:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:27,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:27,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:27,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:26:27,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212590973] [2021-03-11 00:26:27,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:26:27,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:27,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:26:27,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:26:27,346 INFO L87 Difference]: Start difference. First operand 3751 states and 13794 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) [2021-03-11 00:26:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:28,973 INFO L93 Difference]: Finished difference Result 11294 states and 37514 transitions. [2021-03-11 00:26:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-11 00:26:28,974 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 [2021-03-11 00:26:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:28,995 INFO L225 Difference]: With dead ends: 11294 [2021-03-11 00:26:28,995 INFO L226 Difference]: Without dead ends: 11294 [2021-03-11 00:26:28,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 966.3ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-03-11 00:26:29,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11294 states. [2021-03-11 00:26:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11294 to 3699. [2021-03-11 00:26:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3698 states have (on average 3.657382368848026) internal successors, (13525), 3698 states have internal predecessors, (13525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 13525 transitions. [2021-03-11 00:26:29,106 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 13525 transitions. Word has length 28 [2021-03-11 00:26:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:29,106 INFO L480 AbstractCegarLoop]: Abstraction has 3699 states and 13525 transitions. [2021-03-11 00:26:29,106 INFO L481 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) [2021-03-11 00:26:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 13525 transitions. [2021-03-11 00:26:29,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:29,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:29,111 INFO L519 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] [2021-03-11 00:26:29,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:29,312 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:29,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:29,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 74 times [2021-03-11 00:26:29,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:29,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377558856] [2021-03-11 00:26:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:29,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377558856] [2021-03-11 00:26:29,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416901633] [2021-03-11 00:26:29,367 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 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 [2021-03-11 00:26:29,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:26:29,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:29,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:29,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:29,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:29,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:26:29,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531416004] [2021-03-11 00:26:29,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:26:29,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:29,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:26:29,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:26:29,546 INFO L87 Difference]: Start difference. First operand 3699 states and 13525 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) [2021-03-11 00:26:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:31,078 INFO L93 Difference]: Finished difference Result 10614 states and 34080 transitions. [2021-03-11 00:26:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-11 00:26:31,080 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 [2021-03-11 00:26:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:31,102 INFO L225 Difference]: With dead ends: 10614 [2021-03-11 00:26:31,102 INFO L226 Difference]: Without dead ends: 10614 [2021-03-11 00:26:31,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 815.3ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:26:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10614 states. [2021-03-11 00:26:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10614 to 3739. [2021-03-11 00:26:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 3.6615837346174427) internal successors, (13687), 3738 states have internal predecessors, (13687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 13687 transitions. [2021-03-11 00:26:31,220 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 13687 transitions. Word has length 28 [2021-03-11 00:26:31,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:31,221 INFO L480 AbstractCegarLoop]: Abstraction has 3739 states and 13687 transitions. [2021-03-11 00:26:31,221 INFO L481 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) [2021-03-11 00:26:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 13687 transitions. [2021-03-11 00:26:31,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:31,226 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:31,226 INFO L519 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] [2021-03-11 00:26:31,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-03-11 00:26:31,426 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:31,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:31,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 75 times [2021-03-11 00:26:31,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:31,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127015655] [2021-03-11 00:26:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:31,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127015655] [2021-03-11 00:26:31,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025054680] [2021-03-11 00:26:31,497 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 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 [2021-03-11 00:26:31,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:26:31,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:31,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:31,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:31,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:31,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:26:31,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736885028] [2021-03-11 00:26:31,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:26:31,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:31,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:26:31,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:26:31,662 INFO L87 Difference]: Start difference. First operand 3739 states and 13687 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) [2021-03-11 00:26:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:33,195 INFO L93 Difference]: Finished difference Result 10000 states and 32572 transitions. [2021-03-11 00:26:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-11 00:26:33,197 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 [2021-03-11 00:26:33,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:33,215 INFO L225 Difference]: With dead ends: 10000 [2021-03-11 00:26:33,216 INFO L226 Difference]: Without dead ends: 9992 [2021-03-11 00:26:33,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 833.2ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:26:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9992 states. [2021-03-11 00:26:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9992 to 3705. [2021-03-11 00:26:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3704 states have (on average 3.6565874730021597) internal successors, (13544), 3704 states have internal predecessors, (13544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 13544 transitions. [2021-03-11 00:26:33,320 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 13544 transitions. Word has length 28 [2021-03-11 00:26:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:33,320 INFO L480 AbstractCegarLoop]: Abstraction has 3705 states and 13544 transitions. [2021-03-11 00:26:33,320 INFO L481 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) [2021-03-11 00:26:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 13544 transitions. [2021-03-11 00:26:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:33,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:33,325 INFO L519 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] [2021-03-11 00:26:33,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-03-11 00:26:33,526 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:33,526 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 76 times [2021-03-11 00:26:33,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:33,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468901979] [2021-03-11 00:26:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:33,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468901979] [2021-03-11 00:26:33,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907414975] [2021-03-11 00:26:33,583 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 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 [2021-03-11 00:26:33,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:26:33,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:33,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:33,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:33,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:33,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:26:33,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161293380] [2021-03-11 00:26:33,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:26:33,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:33,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:26:33,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:26:33,774 INFO L87 Difference]: Start difference. First operand 3705 states and 13544 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) [2021-03-11 00:26:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:35,373 INFO L93 Difference]: Finished difference Result 9602 states and 31462 transitions. [2021-03-11 00:26:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-11 00:26:35,374 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 [2021-03-11 00:26:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:35,392 INFO L225 Difference]: With dead ends: 9602 [2021-03-11 00:26:35,392 INFO L226 Difference]: Without dead ends: 9602 [2021-03-11 00:26:35,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 883.7ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:26:35,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9602 states. [2021-03-11 00:26:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9602 to 3721. [2021-03-11 00:26:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3720 states have (on average 3.6580645161290324) internal successors, (13608), 3720 states have internal predecessors, (13608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 13608 transitions. [2021-03-11 00:26:35,491 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 13608 transitions. Word has length 28 [2021-03-11 00:26:35,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:35,491 INFO L480 AbstractCegarLoop]: Abstraction has 3721 states and 13608 transitions. [2021-03-11 00:26:35,491 INFO L481 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) [2021-03-11 00:26:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 13608 transitions. [2021-03-11 00:26:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:35,496 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:35,496 INFO L519 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] [2021-03-11 00:26:35,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:35,697 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:35,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 77 times [2021-03-11 00:26:35,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:35,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731612607] [2021-03-11 00:26:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:35,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731612607] [2021-03-11 00:26:35,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283212810] [2021-03-11 00:26:35,751 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 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 [2021-03-11 00:26:35,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:26:35,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:35,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:35,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:35,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:35,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:26:35,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13448855] [2021-03-11 00:26:35,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:26:35,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:35,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:26:35,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:26:35,933 INFO L87 Difference]: Start difference. First operand 3721 states and 13608 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) [2021-03-11 00:26:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:37,485 INFO L93 Difference]: Finished difference Result 9267 states and 30667 transitions. [2021-03-11 00:26:37,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:26:37,486 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 [2021-03-11 00:26:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:37,502 INFO L225 Difference]: With dead ends: 9267 [2021-03-11 00:26:37,502 INFO L226 Difference]: Without dead ends: 9259 [2021-03-11 00:26:37,502 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 819.4ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:26:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9259 states. [2021-03-11 00:26:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9259 to 3389. [2021-03-11 00:26:37,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 3388 states have (on average 3.5714285714285716) internal successors, (12100), 3388 states have internal predecessors, (12100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 12100 transitions. [2021-03-11 00:26:37,590 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 12100 transitions. Word has length 28 [2021-03-11 00:26:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:37,590 INFO L480 AbstractCegarLoop]: Abstraction has 3389 states and 12100 transitions. [2021-03-11 00:26:37,590 INFO L481 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) [2021-03-11 00:26:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 12100 transitions. [2021-03-11 00:26:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:37,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:37,595 INFO L519 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] [2021-03-11 00:26:37,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-03-11 00:26:37,803 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:37,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:37,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 78 times [2021-03-11 00:26:37,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:37,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125282296] [2021-03-11 00:26:37,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:37,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125282296] [2021-03-11 00:26:37,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330968517] [2021-03-11 00:26:37,860 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 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 [2021-03-11 00:26:37,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:26:37,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:37,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:37,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:38,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:38,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:26:38,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480203200] [2021-03-11 00:26:38,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:26:38,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:26:38,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:26:38,068 INFO L87 Difference]: Start difference. First operand 3389 states and 12100 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) [2021-03-11 00:26:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:39,563 INFO L93 Difference]: Finished difference Result 7033 states and 23007 transitions. [2021-03-11 00:26:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-11 00:26:39,564 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 [2021-03-11 00:26:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:39,577 INFO L225 Difference]: With dead ends: 7033 [2021-03-11 00:26:39,577 INFO L226 Difference]: Without dead ends: 7033 [2021-03-11 00:26:39,578 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 905.8ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-03-11 00:26:39,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7033 states. [2021-03-11 00:26:39,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7033 to 3401. [2021-03-11 00:26:39,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 3.57) internal successors, (12138), 3400 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) [2021-03-11 00:26:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 12138 transitions. [2021-03-11 00:26:39,646 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 12138 transitions. Word has length 28 [2021-03-11 00:26:39,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:39,646 INFO L480 AbstractCegarLoop]: Abstraction has 3401 states and 12138 transitions. [2021-03-11 00:26:39,646 INFO L481 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) [2021-03-11 00:26:39,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 12138 transitions. [2021-03-11 00:26:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:39,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:39,650 INFO L519 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] [2021-03-11 00:26:39,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:39,851 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:39,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 79 times [2021-03-11 00:26:39,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:39,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010339405] [2021-03-11 00:26:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:39,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010339405] [2021-03-11 00:26:39,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650311519] [2021-03-11 00:26:39,914 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 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 [2021-03-11 00:26:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:39,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:39,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:40,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:40,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:26:40,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781150084] [2021-03-11 00:26:40,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:26:40,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:40,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:26:40,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:26:40,149 INFO L87 Difference]: Start difference. First operand 3401 states and 12138 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) [2021-03-11 00:26:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:42,085 INFO L93 Difference]: Finished difference Result 7961 states and 25396 transitions. [2021-03-11 00:26:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-11 00:26:42,086 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 [2021-03-11 00:26:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:42,100 INFO L225 Difference]: With dead ends: 7961 [2021-03-11 00:26:42,100 INFO L226 Difference]: Without dead ends: 7961 [2021-03-11 00:26:42,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1247.9ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-03-11 00:26:42,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2021-03-11 00:26:42,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 3467. [2021-03-11 00:26:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 3.5646278130409694) internal successors, (12355), 3466 states have internal predecessors, (12355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 12355 transitions. [2021-03-11 00:26:42,179 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 12355 transitions. Word has length 28 [2021-03-11 00:26:42,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:42,179 INFO L480 AbstractCegarLoop]: Abstraction has 3467 states and 12355 transitions. [2021-03-11 00:26:42,179 INFO L481 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) [2021-03-11 00:26:42,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 12355 transitions. [2021-03-11 00:26:42,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:42,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:42,184 INFO L519 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] [2021-03-11 00:26:42,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:42,384 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:42,385 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 80 times [2021-03-11 00:26:42,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:42,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341447746] [2021-03-11 00:26:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:42,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341447746] [2021-03-11 00:26:42,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057325780] [2021-03-11 00:26:42,450 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 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 [2021-03-11 00:26:42,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:26:42,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:42,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:42,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:42,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:26:42,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779772644] [2021-03-11 00:26:42,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:26:42,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:42,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:26:42,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:26:42,724 INFO L87 Difference]: Start difference. First operand 3467 states and 12355 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) [2021-03-11 00:26:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:44,523 INFO L93 Difference]: Finished difference Result 7344 states and 23768 transitions. [2021-03-11 00:26:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-11 00:26:44,525 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 [2021-03-11 00:26:44,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:44,564 INFO L225 Difference]: With dead ends: 7344 [2021-03-11 00:26:44,564 INFO L226 Difference]: Without dead ends: 7340 [2021-03-11 00:26:44,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1151.1ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-03-11 00:26:44,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7340 states. [2021-03-11 00:26:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7340 to 3402. [2021-03-11 00:26:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 3.5624816230520433) internal successors, (12116), 3401 states have internal predecessors, (12116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:44,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 12116 transitions. [2021-03-11 00:26:44,639 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 12116 transitions. Word has length 28 [2021-03-11 00:26:44,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:44,639 INFO L480 AbstractCegarLoop]: Abstraction has 3402 states and 12116 transitions. [2021-03-11 00:26:44,639 INFO L481 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) [2021-03-11 00:26:44,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 12116 transitions. [2021-03-11 00:26:44,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:44,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:44,644 INFO L519 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] [2021-03-11 00:26:44,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:44,844 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:44,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 68 times [2021-03-11 00:26:44,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:44,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734354153] [2021-03-11 00:26:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:44,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734354153] [2021-03-11 00:26:44,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949403678] [2021-03-11 00:26:44,920 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 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 [2021-03-11 00:26:44,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:26:44,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:44,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:44,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:45,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:45,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:26:45,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621921389] [2021-03-11 00:26:45,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:26:45,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:45,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:26:45,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:26:45,105 INFO L87 Difference]: Start difference. First operand 3402 states and 12116 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) [2021-03-11 00:26:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:46,121 INFO L93 Difference]: Finished difference Result 6487 states and 21356 transitions. [2021-03-11 00:26:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:26:46,121 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 [2021-03-11 00:26:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:46,131 INFO L225 Difference]: With dead ends: 6487 [2021-03-11 00:26:46,131 INFO L226 Difference]: Without dead ends: 6487 [2021-03-11 00:26:46,132 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:26:46,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6487 states. [2021-03-11 00:26:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6487 to 3406. [2021-03-11 00:26:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 3.5641703377386196) internal successors, (12136), 3405 states have internal predecessors, (12136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 12136 transitions. [2021-03-11 00:26:46,192 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 12136 transitions. Word has length 28 [2021-03-11 00:26:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:46,192 INFO L480 AbstractCegarLoop]: Abstraction has 3406 states and 12136 transitions. [2021-03-11 00:26:46,192 INFO L481 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) [2021-03-11 00:26:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 12136 transitions. [2021-03-11 00:26:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:46,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:46,196 INFO L519 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] [2021-03-11 00:26:46,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:46,397 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:46,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:46,397 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 69 times [2021-03-11 00:26:46,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:46,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432235506] [2021-03-11 00:26:46,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:46,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432235506] [2021-03-11 00:26:46,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316958638] [2021-03-11 00:26:46,463 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 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 [2021-03-11 00:26:46,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:26:46,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:46,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:46,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:46,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:26:46,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330014933] [2021-03-11 00:26:46,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:26:46,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:46,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:26:46,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:26:46,635 INFO L87 Difference]: Start difference. First operand 3406 states and 12136 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) [2021-03-11 00:26:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:47,989 INFO L93 Difference]: Finished difference Result 6961 states and 22678 transitions. [2021-03-11 00:26:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:26:47,990 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 [2021-03-11 00:26:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:48,003 INFO L225 Difference]: With dead ends: 6961 [2021-03-11 00:26:48,003 INFO L226 Difference]: Without dead ends: 6961 [2021-03-11 00:26:48,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 787.6ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:26:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2021-03-11 00:26:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 3420. [2021-03-11 00:26:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.5615677098566834) internal successors, (12177), 3419 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 12177 transitions. [2021-03-11 00:26:48,078 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 12177 transitions. Word has length 28 [2021-03-11 00:26:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:48,078 INFO L480 AbstractCegarLoop]: Abstraction has 3420 states and 12177 transitions. [2021-03-11 00:26:48,078 INFO L481 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) [2021-03-11 00:26:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 12177 transitions. [2021-03-11 00:26:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:48,083 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:48,083 INFO L519 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] [2021-03-11 00:26:48,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-03-11 00:26:48,283 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:48,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:48,284 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 70 times [2021-03-11 00:26:48,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:48,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467579765] [2021-03-11 00:26:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:48,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467579765] [2021-03-11 00:26:48,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608155277] [2021-03-11 00:26:48,356 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 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 [2021-03-11 00:26:48,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:26:48,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:48,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:48,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:48,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:48,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:26:48,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807750474] [2021-03-11 00:26:48,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:26:48,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:48,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:26:48,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:26:48,536 INFO L87 Difference]: Start difference. First operand 3420 states and 12177 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) [2021-03-11 00:26:50,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:50,185 INFO L93 Difference]: Finished difference Result 7467 states and 24110 transitions. [2021-03-11 00:26:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-11 00:26:50,187 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 [2021-03-11 00:26:50,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:50,201 INFO L225 Difference]: With dead ends: 7467 [2021-03-11 00:26:50,201 INFO L226 Difference]: Without dead ends: 7467 [2021-03-11 00:26:50,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 958.4ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:26:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7467 states. [2021-03-11 00:26:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7467 to 3500. [2021-03-11 00:26:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3500 states, 3499 states have (on average 3.5550157187767932) internal successors, (12439), 3499 states have internal predecessors, (12439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 12439 transitions. [2021-03-11 00:26:50,285 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 12439 transitions. Word has length 28 [2021-03-11 00:26:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:50,285 INFO L480 AbstractCegarLoop]: Abstraction has 3500 states and 12439 transitions. [2021-03-11 00:26:50,285 INFO L481 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) [2021-03-11 00:26:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 12439 transitions. [2021-03-11 00:26:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:50,289 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:50,289 INFO L519 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] [2021-03-11 00:26:50,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-03-11 00:26:50,490 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:50,490 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 71 times [2021-03-11 00:26:50,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:50,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971449855] [2021-03-11 00:26:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:50,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971449855] [2021-03-11 00:26:50,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280337940] [2021-03-11 00:26:50,557 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 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 [2021-03-11 00:26:50,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:26:50,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:50,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:50,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:50,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-03-11 00:26:50,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626021934] [2021-03-11 00:26:50,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:26:50,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:50,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:26:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:26:50,787 INFO L87 Difference]: Start difference. First operand 3500 states and 12439 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) [2021-03-11 00:26:51,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:51,907 INFO L93 Difference]: Finished difference Result 7330 states and 25046 transitions. [2021-03-11 00:26:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:26:51,909 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 [2021-03-11 00:26:51,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:51,924 INFO L225 Difference]: With dead ends: 7330 [2021-03-11 00:26:51,924 INFO L226 Difference]: Without dead ends: 7330 [2021-03-11 00:26:51,924 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 743.8ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:26:51,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-03-11 00:26:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 4678. [2021-03-11 00:26:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 3.6730810348514003) internal successors, (17179), 4677 states have internal predecessors, (17179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 17179 transitions. [2021-03-11 00:26:52,012 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 17179 transitions. Word has length 28 [2021-03-11 00:26:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:52,013 INFO L480 AbstractCegarLoop]: Abstraction has 4678 states and 17179 transitions. [2021-03-11 00:26:52,013 INFO L481 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) [2021-03-11 00:26:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 17179 transitions. [2021-03-11 00:26:52,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:52,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:52,020 INFO L519 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] [2021-03-11 00:26:52,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-03-11 00:26:52,221 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:52,221 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 72 times [2021-03-11 00:26:52,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:52,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339410111] [2021-03-11 00:26:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:52,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339410111] [2021-03-11 00:26:52,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594337819] [2021-03-11 00:26:52,298 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 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 [2021-03-11 00:26:52,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:26:52,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:52,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:26:52,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:52,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:52,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:26:52,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065738554] [2021-03-11 00:26:52,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:26:52,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:52,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:26:52,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:26:52,481 INFO L87 Difference]: Start difference. First operand 4678 states and 17179 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) [2021-03-11 00:26:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:53,982 INFO L93 Difference]: Finished difference Result 8463 states and 28955 transitions. [2021-03-11 00:26:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-11 00:26:53,984 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 [2021-03-11 00:26:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:53,999 INFO L225 Difference]: With dead ends: 8463 [2021-03-11 00:26:53,999 INFO L226 Difference]: Without dead ends: 8459 [2021-03-11 00:26:53,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 859.7ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:26:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8459 states. [2021-03-11 00:26:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8459 to 4570. [2021-03-11 00:26:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 3.683738235937842) internal successors, (16831), 4569 states have internal predecessors, (16831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 16831 transitions. [2021-03-11 00:26:54,113 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 16831 transitions. Word has length 28 [2021-03-11 00:26:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:54,113 INFO L480 AbstractCegarLoop]: Abstraction has 4570 states and 16831 transitions. [2021-03-11 00:26:54,113 INFO L481 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) [2021-03-11 00:26:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 16831 transitions. [2021-03-11 00:26:54,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:54,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:54,119 INFO L519 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] [2021-03-11 00:26:54,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-03-11 00:26:54,320 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:54,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:54,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 81 times [2021-03-11 00:26:54,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:54,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894723244] [2021-03-11 00:26:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:54,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894723244] [2021-03-11 00:26:54,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414478142] [2021-03-11 00:26:54,374 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 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 [2021-03-11 00:26:54,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:26:54,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:54,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:26:54,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:54,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:54,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-11 00:26:54,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842361029] [2021-03-11 00:26:54,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:26:54,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:54,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:26:54,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:26:54,578 INFO L87 Difference]: Start difference. First operand 4570 states and 16831 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) [2021-03-11 00:26:56,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:56,052 INFO L93 Difference]: Finished difference Result 9645 states and 32628 transitions. [2021-03-11 00:26:56,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:26:56,054 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 [2021-03-11 00:26:56,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:56,074 INFO L225 Difference]: With dead ends: 9645 [2021-03-11 00:26:56,074 INFO L226 Difference]: Without dead ends: 9633 [2021-03-11 00:26:56,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 835.4ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:26:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9633 states. [2021-03-11 00:26:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9633 to 5049. [2021-03-11 00:26:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5049 states, 5048 states have (on average 3.7652535657686212) internal successors, (19007), 5048 states have internal predecessors, (19007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5049 states to 5049 states and 19007 transitions. [2021-03-11 00:26:56,214 INFO L78 Accepts]: Start accepts. Automaton has 5049 states and 19007 transitions. Word has length 28 [2021-03-11 00:26:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:56,214 INFO L480 AbstractCegarLoop]: Abstraction has 5049 states and 19007 transitions. [2021-03-11 00:26:56,214 INFO L481 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) [2021-03-11 00:26:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5049 states and 19007 transitions. [2021-03-11 00:26:56,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:56,221 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:56,221 INFO L519 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] [2021-03-11 00:26:56,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-03-11 00:26:56,421 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:56,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:56,422 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 82 times [2021-03-11 00:26:56,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:56,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258961916] [2021-03-11 00:26:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:56,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258961916] [2021-03-11 00:26:56,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247300851] [2021-03-11 00:26:56,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:26:56,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:26:56,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:56,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:26:56,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:56,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:56,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-11 00:26:56,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719092561] [2021-03-11 00:26:56,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:26:56,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:56,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:26:56,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:26:56,678 INFO L87 Difference]: Start difference. First operand 5049 states and 19007 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) [2021-03-11 00:26:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:58,287 INFO L93 Difference]: Finished difference Result 9975 states and 33666 transitions. [2021-03-11 00:26:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:26:58,289 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 [2021-03-11 00:26:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:58,309 INFO L225 Difference]: With dead ends: 9975 [2021-03-11 00:26:58,309 INFO L226 Difference]: Without dead ends: 9975 [2021-03-11 00:26:58,309 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 912.4ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:26:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9975 states. [2021-03-11 00:26:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9975 to 5068. [2021-03-11 00:26:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5068 states, 5067 states have (on average 3.7499506611407143) internal successors, (19001), 5067 states have internal predecessors, (19001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:58,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5068 states to 5068 states and 19001 transitions. [2021-03-11 00:26:58,450 INFO L78 Accepts]: Start accepts. Automaton has 5068 states and 19001 transitions. Word has length 28 [2021-03-11 00:26:58,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:58,451 INFO L480 AbstractCegarLoop]: Abstraction has 5068 states and 19001 transitions. [2021-03-11 00:26:58,451 INFO L481 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) [2021-03-11 00:26:58,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5068 states and 19001 transitions. [2021-03-11 00:26:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:58,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:58,458 INFO L519 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] [2021-03-11 00:26:58,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-03-11 00:26:58,658 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:58,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:58,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 83 times [2021-03-11 00:26:58,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:58,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021308358] [2021-03-11 00:26:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:58,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021308358] [2021-03-11 00:26:58,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732483933] [2021-03-11 00:26:58,722 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 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 [2021-03-11 00:26:58,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:26:58,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:58,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:26:58,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:58,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:58,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:26:58,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067389449] [2021-03-11 00:26:58,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:26:58,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:58,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:26:58,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:26:58,894 INFO L87 Difference]: Start difference. First operand 5068 states and 19001 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) [2021-03-11 00:26:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:59,773 INFO L93 Difference]: Finished difference Result 9405 states and 33542 transitions. [2021-03-11 00:26:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:26:59,775 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 [2021-03-11 00:26:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:59,795 INFO L225 Difference]: With dead ends: 9405 [2021-03-11 00:26:59,796 INFO L226 Difference]: Without dead ends: 9322 [2021-03-11 00:26:59,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 456.9ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:26:59,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9322 states. [2021-03-11 00:26:59,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9322 to 6492. [2021-03-11 00:26:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6492 states, 6491 states have (on average 3.795717146818672) internal successors, (24638), 6491 states have internal predecessors, (24638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6492 states to 6492 states and 24638 transitions. [2021-03-11 00:26:59,932 INFO L78 Accepts]: Start accepts. Automaton has 6492 states and 24638 transitions. Word has length 28 [2021-03-11 00:26:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:59,932 INFO L480 AbstractCegarLoop]: Abstraction has 6492 states and 24638 transitions. [2021-03-11 00:26:59,932 INFO L481 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) [2021-03-11 00:26:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 6492 states and 24638 transitions. [2021-03-11 00:26:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:26:59,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:59,943 INFO L519 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] [2021-03-11 00:27:00,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:00,144 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:00,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:00,144 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 84 times [2021-03-11 00:27:00,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:00,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907623327] [2021-03-11 00:27:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:00,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907623327] [2021-03-11 00:27:00,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549912251] [2021-03-11 00:27:00,202 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 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 [2021-03-11 00:27:00,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:27:00,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:00,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:27:00,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:00,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:00,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-03-11 00:27:00,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636971226] [2021-03-11 00:27:00,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:27:00,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:00,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:27:00,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:27:00,363 INFO L87 Difference]: Start difference. First operand 6492 states and 24638 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) [2021-03-11 00:27:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:00,756 INFO L93 Difference]: Finished difference Result 8975 states and 31868 transitions. [2021-03-11 00:27:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:27:00,758 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 [2021-03-11 00:27:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:00,777 INFO L225 Difference]: With dead ends: 8975 [2021-03-11 00:27:00,777 INFO L226 Difference]: Without dead ends: 8975 [2021-03-11 00:27:00,777 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:27:00,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8975 states. [2021-03-11 00:27:00,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8975 to 6570. [2021-03-11 00:27:00,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6569 states have (on average 3.777896179022682) internal successors, (24817), 6569 states have internal predecessors, (24817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 24817 transitions. [2021-03-11 00:27:00,920 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 24817 transitions. Word has length 28 [2021-03-11 00:27:00,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:00,920 INFO L480 AbstractCegarLoop]: Abstraction has 6570 states and 24817 transitions. [2021-03-11 00:27:00,920 INFO L481 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) [2021-03-11 00:27:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 24817 transitions. [2021-03-11 00:27:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:00,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:00,931 INFO L519 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] [2021-03-11 00:27:01,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:01,132 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:01,132 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 85 times [2021-03-11 00:27:01,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:01,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438209170] [2021-03-11 00:27:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:01,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438209170] [2021-03-11 00:27:01,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771659958] [2021-03-11 00:27:01,221 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 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 [2021-03-11 00:27:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:01,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:01,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:01,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:01,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-11 00:27:01,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582908846] [2021-03-11 00:27:01,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:27:01,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:01,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:27:01,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:27:01,415 INFO L87 Difference]: Start difference. First operand 6570 states and 24817 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) [2021-03-11 00:27:02,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:02,928 INFO L93 Difference]: Finished difference Result 13578 states and 47526 transitions. [2021-03-11 00:27:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-11 00:27:02,930 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 [2021-03-11 00:27:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:02,961 INFO L225 Difference]: With dead ends: 13578 [2021-03-11 00:27:02,961 INFO L226 Difference]: Without dead ends: 13578 [2021-03-11 00:27:02,962 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 923.4ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:27:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13578 states. [2021-03-11 00:27:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13578 to 7315. [2021-03-11 00:27:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 7314 states have (on average 3.7873940388296417) internal successors, (27701), 7314 states have internal predecessors, (27701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 27701 transitions. [2021-03-11 00:27:03,175 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 27701 transitions. Word has length 28 [2021-03-11 00:27:03,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:03,175 INFO L480 AbstractCegarLoop]: Abstraction has 7315 states and 27701 transitions. [2021-03-11 00:27:03,175 INFO L481 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) [2021-03-11 00:27:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 27701 transitions. [2021-03-11 00:27:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:03,187 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:03,187 INFO L519 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] [2021-03-11 00:27:03,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:03,388 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:03,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:03,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 86 times [2021-03-11 00:27:03,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:03,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569375377] [2021-03-11 00:27:03,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:03,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569375377] [2021-03-11 00:27:03,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677038376] [2021-03-11 00:27:03,493 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 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 [2021-03-11 00:27:03,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:27:03,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:03,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:03,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:03,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:03,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-03-11 00:27:03,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913958152] [2021-03-11 00:27:03,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:27:03,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:03,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:27:03,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:27:03,672 INFO L87 Difference]: Start difference. First operand 7315 states and 27701 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) [2021-03-11 00:27:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:04,824 INFO L93 Difference]: Finished difference Result 13779 states and 48245 transitions. [2021-03-11 00:27:04,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:27:04,826 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 [2021-03-11 00:27:04,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:04,856 INFO L225 Difference]: With dead ends: 13779 [2021-03-11 00:27:04,856 INFO L226 Difference]: Without dead ends: 13779 [2021-03-11 00:27:04,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 693.9ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:27:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13779 states. [2021-03-11 00:27:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13779 to 7585. [2021-03-11 00:27:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 7584 states have (on average 3.7655590717299576) internal successors, (28558), 7584 states have internal predecessors, (28558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 28558 transitions. [2021-03-11 00:27:05,095 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 28558 transitions. Word has length 28 [2021-03-11 00:27:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:05,095 INFO L480 AbstractCegarLoop]: Abstraction has 7585 states and 28558 transitions. [2021-03-11 00:27:05,096 INFO L481 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) [2021-03-11 00:27:05,096 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 28558 transitions. [2021-03-11 00:27:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:05,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:05,108 INFO L519 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] [2021-03-11 00:27:05,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:05,308 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:05,309 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 87 times [2021-03-11 00:27:05,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:05,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112950390] [2021-03-11 00:27:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:05,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112950390] [2021-03-11 00:27:05,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191416560] [2021-03-11 00:27:05,369 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 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 [2021-03-11 00:27:05,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:27:05,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:05,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:27:05,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:05,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:05,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:27:05,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499971502] [2021-03-11 00:27:05,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:27:05,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:05,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:27:05,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:27:05,550 INFO L87 Difference]: Start difference. First operand 7585 states and 28558 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) [2021-03-11 00:27:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:06,293 INFO L93 Difference]: Finished difference Result 10144 states and 36719 transitions. [2021-03-11 00:27:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:27:06,296 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 [2021-03-11 00:27:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:06,317 INFO L225 Difference]: With dead ends: 10144 [2021-03-11 00:27:06,317 INFO L226 Difference]: Without dead ends: 10114 [2021-03-11 00:27:06,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 397.7ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:27:06,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10114 states. [2021-03-11 00:27:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10114 to 8411. [2021-03-11 00:27:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8411 states, 8410 states have (on average 3.7869203329369796) internal successors, (31848), 8410 states have internal predecessors, (31848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8411 states to 8411 states and 31848 transitions. [2021-03-11 00:27:06,479 INFO L78 Accepts]: Start accepts. Automaton has 8411 states and 31848 transitions. Word has length 28 [2021-03-11 00:27:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:06,479 INFO L480 AbstractCegarLoop]: Abstraction has 8411 states and 31848 transitions. [2021-03-11 00:27:06,479 INFO L481 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) [2021-03-11 00:27:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand 8411 states and 31848 transitions. [2021-03-11 00:27:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:06,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:06,493 INFO L519 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] [2021-03-11 00:27:06,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:06,693 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:06,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:06,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 88 times [2021-03-11 00:27:06,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:06,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397341555] [2021-03-11 00:27:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:06,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397341555] [2021-03-11 00:27:06,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694923263] [2021-03-11 00:27:06,750 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 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 [2021-03-11 00:27:06,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:27:06,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:06,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:27:06,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:06,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:06,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:27:06,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417123548] [2021-03-11 00:27:06,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:27:06,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:06,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:27:06,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:27:06,925 INFO L87 Difference]: Start difference. First operand 8411 states and 31848 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) [2021-03-11 00:27:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:07,670 INFO L93 Difference]: Finished difference Result 10709 states and 38590 transitions. [2021-03-11 00:27:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:27:07,672 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 [2021-03-11 00:27:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:07,694 INFO L225 Difference]: With dead ends: 10709 [2021-03-11 00:27:07,695 INFO L226 Difference]: Without dead ends: 10709 [2021-03-11 00:27:07,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:27:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10709 states. [2021-03-11 00:27:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10709 to 8451. [2021-03-11 00:27:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 3.7830769230769232) internal successors, (31967), 8450 states have internal predecessors, (31967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 31967 transitions. [2021-03-11 00:27:07,858 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 31967 transitions. Word has length 28 [2021-03-11 00:27:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:07,858 INFO L480 AbstractCegarLoop]: Abstraction has 8451 states and 31967 transitions. [2021-03-11 00:27:07,858 INFO L481 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) [2021-03-11 00:27:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 31967 transitions. [2021-03-11 00:27:07,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:07,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:07,872 INFO L519 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] [2021-03-11 00:27:08,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:08,072 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:08,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 89 times [2021-03-11 00:27:08,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:08,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810953965] [2021-03-11 00:27:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:08,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810953965] [2021-03-11 00:27:08,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539965715] [2021-03-11 00:27:08,153 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 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 [2021-03-11 00:27:08,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:27:08,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:08,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:08,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:08,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:08,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-03-11 00:27:08,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775911620] [2021-03-11 00:27:08,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:27:08,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:08,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:27:08,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:27:08,321 INFO L87 Difference]: Start difference. First operand 8451 states and 31967 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) [2021-03-11 00:27:09,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:09,563 INFO L93 Difference]: Finished difference Result 14453 states and 51485 transitions. [2021-03-11 00:27:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:27:09,565 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 [2021-03-11 00:27:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:09,599 INFO L225 Difference]: With dead ends: 14453 [2021-03-11 00:27:09,599 INFO L226 Difference]: Without dead ends: 14449 [2021-03-11 00:27:09,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 691.5ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:27:09,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14449 states. [2021-03-11 00:27:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14449 to 8349. [2021-03-11 00:27:09,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8349 states, 8348 states have (on average 3.7870148538572113) internal successors, (31614), 8348 states have internal predecessors, (31614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8349 states to 8349 states and 31614 transitions. [2021-03-11 00:27:09,857 INFO L78 Accepts]: Start accepts. Automaton has 8349 states and 31614 transitions. Word has length 28 [2021-03-11 00:27:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:09,857 INFO L480 AbstractCegarLoop]: Abstraction has 8349 states and 31614 transitions. [2021-03-11 00:27:09,857 INFO L481 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) [2021-03-11 00:27:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 8349 states and 31614 transitions. [2021-03-11 00:27:09,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:09,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:09,869 INFO L519 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] [2021-03-11 00:27:10,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:10,070 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:10,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 90 times [2021-03-11 00:27:10,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:10,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868322589] [2021-03-11 00:27:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:10,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868322589] [2021-03-11 00:27:10,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166720077] [2021-03-11 00:27:10,142 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 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 [2021-03-11 00:27:10,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:27:10,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:27:10,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:10,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:10,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:27:10,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050822964] [2021-03-11 00:27:10,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:27:10,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:10,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:27:10,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:27:10,338 INFO L87 Difference]: Start difference. First operand 8349 states and 31614 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) [2021-03-11 00:27:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:11,235 INFO L93 Difference]: Finished difference Result 10938 states and 39433 transitions. [2021-03-11 00:27:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:27:11,237 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 [2021-03-11 00:27:11,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:11,261 INFO L225 Difference]: With dead ends: 10938 [2021-03-11 00:27:11,261 INFO L226 Difference]: Without dead ends: 10938 [2021-03-11 00:27:11,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 508.5ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:27:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10938 states. [2021-03-11 00:27:11,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10938 to 8295. [2021-03-11 00:27:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8295 states, 8294 states have (on average 3.780564263322884) internal successors, (31356), 8294 states have internal predecessors, (31356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8295 states to 8295 states and 31356 transitions. [2021-03-11 00:27:11,422 INFO L78 Accepts]: Start accepts. Automaton has 8295 states and 31356 transitions. Word has length 28 [2021-03-11 00:27:11,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:11,422 INFO L480 AbstractCegarLoop]: Abstraction has 8295 states and 31356 transitions. [2021-03-11 00:27:11,422 INFO L481 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) [2021-03-11 00:27:11,422 INFO L276 IsEmpty]: Start isEmpty. Operand 8295 states and 31356 transitions. [2021-03-11 00:27:11,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:11,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:11,435 INFO L519 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] [2021-03-11 00:27:11,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-03-11 00:27:11,637 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:11,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 91 times [2021-03-11 00:27:11,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:11,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828519252] [2021-03-11 00:27:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:11,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828519252] [2021-03-11 00:27:11,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973123957] [2021-03-11 00:27:11,725 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 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 [2021-03-11 00:27:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:11,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:11,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:11,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:11,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-11 00:27:11,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215898396] [2021-03-11 00:27:11,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:27:11,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:11,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:27:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:27:11,899 INFO L87 Difference]: Start difference. First operand 8295 states and 31356 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) [2021-03-11 00:27:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:13,260 INFO L93 Difference]: Finished difference Result 14334 states and 50973 transitions. [2021-03-11 00:27:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:27:13,262 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 [2021-03-11 00:27:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:13,288 INFO L225 Difference]: With dead ends: 14334 [2021-03-11 00:27:13,289 INFO L226 Difference]: Without dead ends: 14322 [2021-03-11 00:27:13,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 769.5ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:27:13,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14322 states. [2021-03-11 00:27:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14322 to 8295. [2021-03-11 00:27:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8295 states, 8294 states have (on average 3.780081986978539) internal successors, (31352), 8294 states have internal predecessors, (31352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8295 states to 8295 states and 31352 transitions. [2021-03-11 00:27:13,469 INFO L78 Accepts]: Start accepts. Automaton has 8295 states and 31352 transitions. Word has length 28 [2021-03-11 00:27:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:13,469 INFO L480 AbstractCegarLoop]: Abstraction has 8295 states and 31352 transitions. [2021-03-11 00:27:13,469 INFO L481 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) [2021-03-11 00:27:13,469 INFO L276 IsEmpty]: Start isEmpty. Operand 8295 states and 31352 transitions. [2021-03-11 00:27:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:13,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:13,480 INFO L519 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] [2021-03-11 00:27:13,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-03-11 00:27:13,681 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:13,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:13,681 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 92 times [2021-03-11 00:27:13,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:13,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519624647] [2021-03-11 00:27:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:13,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519624647] [2021-03-11 00:27:13,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186855839] [2021-03-11 00:27:13,755 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 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 [2021-03-11 00:27:13,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:27:13,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:13,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:13,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:13,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:13,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-11 00:27:13,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581699109] [2021-03-11 00:27:13,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:27:13,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:13,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:27:13,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:27:13,934 INFO L87 Difference]: Start difference. First operand 8295 states and 31352 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) [2021-03-11 00:27:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:16,432 INFO L93 Difference]: Finished difference Result 22194 states and 77568 transitions. [2021-03-11 00:27:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-11 00:27:16,432 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 [2021-03-11 00:27:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:16,481 INFO L225 Difference]: With dead ends: 22194 [2021-03-11 00:27:16,482 INFO L226 Difference]: Without dead ends: 22194 [2021-03-11 00:27:16,482 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 1514.8ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-03-11 00:27:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22194 states. [2021-03-11 00:27:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22194 to 11506. [2021-03-11 00:27:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11506 states, 11505 states have (on average 3.8243372446762276) internal successors, (43999), 11505 states have internal predecessors, (43999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11506 states to 11506 states and 43999 transitions. [2021-03-11 00:27:16,857 INFO L78 Accepts]: Start accepts. Automaton has 11506 states and 43999 transitions. Word has length 28 [2021-03-11 00:27:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:16,857 INFO L480 AbstractCegarLoop]: Abstraction has 11506 states and 43999 transitions. [2021-03-11 00:27:16,858 INFO L481 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) [2021-03-11 00:27:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 11506 states and 43999 transitions. [2021-03-11 00:27:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:16,877 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:16,877 INFO L519 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] [2021-03-11 00:27:17,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-03-11 00:27:17,078 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:17,078 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 93 times [2021-03-11 00:27:17,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:17,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538959677] [2021-03-11 00:27:17,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:17,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538959677] [2021-03-11 00:27:17,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978474181] [2021-03-11 00:27:17,169 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 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 [2021-03-11 00:27:17,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:27:17,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:17,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:17,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:17,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:17,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-11 00:27:17,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301318040] [2021-03-11 00:27:17,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:27:17,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:17,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:27:17,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:27:17,379 INFO L87 Difference]: Start difference. First operand 11506 states and 43999 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) [2021-03-11 00:27:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:19,742 INFO L93 Difference]: Finished difference Result 21305 states and 75279 transitions. [2021-03-11 00:27:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:27:19,744 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 [2021-03-11 00:27:19,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:19,794 INFO L225 Difference]: With dead ends: 21305 [2021-03-11 00:27:19,795 INFO L226 Difference]: Without dead ends: 21293 [2021-03-11 00:27:19,795 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 1353.4ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-03-11 00:27:19,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21293 states. [2021-03-11 00:27:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21293 to 11322. [2021-03-11 00:27:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11322 states, 11321 states have (on average 3.8303153431675647) internal successors, (43363), 11321 states have internal predecessors, (43363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11322 states to 11322 states and 43363 transitions. [2021-03-11 00:27:20,146 INFO L78 Accepts]: Start accepts. Automaton has 11322 states and 43363 transitions. Word has length 28 [2021-03-11 00:27:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:20,146 INFO L480 AbstractCegarLoop]: Abstraction has 11322 states and 43363 transitions. [2021-03-11 00:27:20,146 INFO L481 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) [2021-03-11 00:27:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 11322 states and 43363 transitions. [2021-03-11 00:27:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:20,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:20,166 INFO L519 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] [2021-03-11 00:27:20,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:20,367 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:20,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:20,367 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 94 times [2021-03-11 00:27:20,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:20,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414006809] [2021-03-11 00:27:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:20,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414006809] [2021-03-11 00:27:20,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566277127] [2021-03-11 00:27:20,458 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 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 [2021-03-11 00:27:20,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:27:20,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:20,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:20,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:20,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:20,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-11 00:27:20,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826469997] [2021-03-11 00:27:20,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:27:20,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:20,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:27:20,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:27:20,643 INFO L87 Difference]: Start difference. First operand 11322 states and 43363 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) [2021-03-11 00:27:22,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:22,807 INFO L93 Difference]: Finished difference Result 21173 states and 74684 transitions. [2021-03-11 00:27:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-11 00:27:22,809 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 [2021-03-11 00:27:22,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:22,860 INFO L225 Difference]: With dead ends: 21173 [2021-03-11 00:27:22,860 INFO L226 Difference]: Without dead ends: 21137 [2021-03-11 00:27:22,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1269.2ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-03-11 00:27:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21137 states. [2021-03-11 00:27:23,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21137 to 11370. [2021-03-11 00:27:23,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 11369 states have (on average 3.829624417275046) internal successors, (43539), 11369 states have internal predecessors, (43539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 43539 transitions. [2021-03-11 00:27:23,209 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 43539 transitions. Word has length 28 [2021-03-11 00:27:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:23,209 INFO L480 AbstractCegarLoop]: Abstraction has 11370 states and 43539 transitions. [2021-03-11 00:27:23,209 INFO L481 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) [2021-03-11 00:27:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 43539 transitions. [2021-03-11 00:27:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:23,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:23,229 INFO L519 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] [2021-03-11 00:27:23,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-03-11 00:27:23,430 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:23,430 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 95 times [2021-03-11 00:27:23,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:23,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676067753] [2021-03-11 00:27:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:23,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676067753] [2021-03-11 00:27:23,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446616671] [2021-03-11 00:27:23,520 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 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 [2021-03-11 00:27:23,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:27:23,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:23,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:23,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:23,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:23,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:27:23,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408209040] [2021-03-11 00:27:23,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:27:23,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:23,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:27:23,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:27:23,789 INFO L87 Difference]: Start difference. First operand 11370 states and 43539 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) [2021-03-11 00:27:26,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:26,941 INFO L93 Difference]: Finished difference Result 20914 states and 74023 transitions. [2021-03-11 00:27:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-03-11 00:27:26,941 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 [2021-03-11 00:27:26,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:26,986 INFO L225 Difference]: With dead ends: 20914 [2021-03-11 00:27:26,986 INFO L226 Difference]: Without dead ends: 20914 [2021-03-11 00:27:26,987 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 1958.6ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-03-11 00:27:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20914 states. [2021-03-11 00:27:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20914 to 11566. [2021-03-11 00:27:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11566 states, 11565 states have (on average 3.820925205361003) internal successors, (44189), 11565 states have internal predecessors, (44189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11566 states to 11566 states and 44189 transitions. [2021-03-11 00:27:27,277 INFO L78 Accepts]: Start accepts. Automaton has 11566 states and 44189 transitions. Word has length 28 [2021-03-11 00:27:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:27,277 INFO L480 AbstractCegarLoop]: Abstraction has 11566 states and 44189 transitions. [2021-03-11 00:27:27,277 INFO L481 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) [2021-03-11 00:27:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 11566 states and 44189 transitions. [2021-03-11 00:27:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:27,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:27,294 INFO L519 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] [2021-03-11 00:27:27,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:27,495 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:27,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:27,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 96 times [2021-03-11 00:27:27,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:27,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455627208] [2021-03-11 00:27:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:27,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455627208] [2021-03-11 00:27:27,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463852128] [2021-03-11 00:27:27,571 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 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 [2021-03-11 00:27:27,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:27:27,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:27,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:27,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:27,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:27,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:27:27,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948587106] [2021-03-11 00:27:27,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:27:27,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:27,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:27:27,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:27:27,793 INFO L87 Difference]: Start difference. First operand 11566 states and 44189 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) [2021-03-11 00:27:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:30,549 INFO L93 Difference]: Finished difference Result 20375 states and 72554 transitions. [2021-03-11 00:27:30,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-11 00:27:30,551 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 [2021-03-11 00:27:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:30,602 INFO L225 Difference]: With dead ends: 20375 [2021-03-11 00:27:30,602 INFO L226 Difference]: Without dead ends: 20363 [2021-03-11 00:27:30,603 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1629.8ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-03-11 00:27:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20363 states. [2021-03-11 00:27:30,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20363 to 11444. [2021-03-11 00:27:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11444 states, 11443 states have (on average 3.82469632089487) internal successors, (43766), 11443 states have internal predecessors, (43766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11444 states to 11444 states and 43766 transitions. [2021-03-11 00:27:30,923 INFO L78 Accepts]: Start accepts. Automaton has 11444 states and 43766 transitions. Word has length 28 [2021-03-11 00:27:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:30,923 INFO L480 AbstractCegarLoop]: Abstraction has 11444 states and 43766 transitions. [2021-03-11 00:27:30,923 INFO L481 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) [2021-03-11 00:27:30,923 INFO L276 IsEmpty]: Start isEmpty. Operand 11444 states and 43766 transitions. [2021-03-11 00:27:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:30,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:30,943 INFO L519 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] [2021-03-11 00:27:31,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-03-11 00:27:31,144 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:31,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 97 times [2021-03-11 00:27:31,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:31,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584204752] [2021-03-11 00:27:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:31,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584204752] [2021-03-11 00:27:31,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731758422] [2021-03-11 00:27:31,272 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 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 [2021-03-11 00:27:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:31,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:31,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:31,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:31,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-03-11 00:27:31,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040487939] [2021-03-11 00:27:31,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:27:31,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:31,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:27:31,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:27:31,575 INFO L87 Difference]: Start difference. First operand 11444 states and 43766 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) [2021-03-11 00:27:33,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:33,987 INFO L93 Difference]: Finished difference Result 19613 states and 70459 transitions. [2021-03-11 00:27:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-11 00:27:33,990 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 [2021-03-11 00:27:33,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:34,034 INFO L225 Difference]: With dead ends: 19613 [2021-03-11 00:27:34,034 INFO L226 Difference]: Without dead ends: 19577 [2021-03-11 00:27:34,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 1480.4ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-03-11 00:27:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19577 states. [2021-03-11 00:27:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19577 to 11468. [2021-03-11 00:27:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11468 states, 11467 states have (on average 3.8236679166303307) internal successors, (43846), 11467 states have internal predecessors, (43846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11468 states to 11468 states and 43846 transitions. [2021-03-11 00:27:34,317 INFO L78 Accepts]: Start accepts. Automaton has 11468 states and 43846 transitions. Word has length 28 [2021-03-11 00:27:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:34,317 INFO L480 AbstractCegarLoop]: Abstraction has 11468 states and 43846 transitions. [2021-03-11 00:27:34,318 INFO L481 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) [2021-03-11 00:27:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 11468 states and 43846 transitions. [2021-03-11 00:27:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:34,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:34,335 INFO L519 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] [2021-03-11 00:27:34,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:34,536 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:34,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:34,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 98 times [2021-03-11 00:27:34,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:34,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254919341] [2021-03-11 00:27:34,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:34,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254919341] [2021-03-11 00:27:34,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104992802] [2021-03-11 00:27:34,612 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 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 [2021-03-11 00:27:34,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:27:34,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:34,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:34,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:34,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:34,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:27:34,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283867518] [2021-03-11 00:27:34,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:27:34,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:34,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:27:34,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:27:34,878 INFO L87 Difference]: Start difference. First operand 11468 states and 43846 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) [2021-03-11 00:27:37,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:37,884 INFO L93 Difference]: Finished difference Result 28622 states and 102312 transitions. [2021-03-11 00:27:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-03-11 00:27:37,887 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 [2021-03-11 00:27:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:37,961 INFO L225 Difference]: With dead ends: 28622 [2021-03-11 00:27:37,961 INFO L226 Difference]: Without dead ends: 28622 [2021-03-11 00:27:37,962 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 1829.3ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-03-11 00:27:37,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28622 states. [2021-03-11 00:27:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28622 to 11820. [2021-03-11 00:27:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11820 states, 11819 states have (on average 3.8508334038412726) internal successors, (45513), 11819 states have internal predecessors, (45513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11820 states to 11820 states and 45513 transitions. [2021-03-11 00:27:38,376 INFO L78 Accepts]: Start accepts. Automaton has 11820 states and 45513 transitions. Word has length 28 [2021-03-11 00:27:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:38,377 INFO L480 AbstractCegarLoop]: Abstraction has 11820 states and 45513 transitions. [2021-03-11 00:27:38,377 INFO L481 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) [2021-03-11 00:27:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 11820 states and 45513 transitions. [2021-03-11 00:27:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:38,398 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:38,398 INFO L519 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] [2021-03-11 00:27:38,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-03-11 00:27:38,599 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:38,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 99 times [2021-03-11 00:27:38,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:38,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873368223] [2021-03-11 00:27:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:38,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873368223] [2021-03-11 00:27:38,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725713983] [2021-03-11 00:27:38,685 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 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 [2021-03-11 00:27:38,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:27:38,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:38,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:38,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:38,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:38,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:27:38,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408689029] [2021-03-11 00:27:38,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:27:38,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:38,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:27:38,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:27:38,942 INFO L87 Difference]: Start difference. First operand 11820 states and 45513 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) [2021-03-11 00:27:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:41,653 INFO L93 Difference]: Finished difference Result 28081 states and 101108 transitions. [2021-03-11 00:27:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-03-11 00:27:41,656 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 [2021-03-11 00:27:41,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:41,719 INFO L225 Difference]: With dead ends: 28081 [2021-03-11 00:27:41,719 INFO L226 Difference]: Without dead ends: 28081 [2021-03-11 00:27:41,719 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 1699.9ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-03-11 00:27:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28081 states. [2021-03-11 00:27:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28081 to 11710. [2021-03-11 00:27:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11710 states, 11709 states have (on average 3.838244085746007) internal successors, (44942), 11709 states have internal predecessors, (44942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11710 states to 11710 states and 44942 transitions. [2021-03-11 00:27:42,086 INFO L78 Accepts]: Start accepts. Automaton has 11710 states and 44942 transitions. Word has length 28 [2021-03-11 00:27:42,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:42,086 INFO L480 AbstractCegarLoop]: Abstraction has 11710 states and 44942 transitions. [2021-03-11 00:27:42,086 INFO L481 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) [2021-03-11 00:27:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 11710 states and 44942 transitions. [2021-03-11 00:27:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:42,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:42,104 INFO L519 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] [2021-03-11 00:27:42,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:42,305 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:42,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:42,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 100 times [2021-03-11 00:27:42,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:42,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989919111] [2021-03-11 00:27:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:42,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989919111] [2021-03-11 00:27:42,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441479047] [2021-03-11 00:27:42,378 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 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 [2021-03-11 00:27:42,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:27:42,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:42,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:42,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:42,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:42,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:27:42,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906276732] [2021-03-11 00:27:42,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:27:42,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:42,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:27:42,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:27:42,638 INFO L87 Difference]: Start difference. First operand 11710 states and 44942 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) [2021-03-11 00:27:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:44,454 INFO L93 Difference]: Finished difference Result 22237 states and 80394 transitions. [2021-03-11 00:27:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:27:44,456 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 [2021-03-11 00:27:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:44,502 INFO L225 Difference]: With dead ends: 22237 [2021-03-11 00:27:44,503 INFO L226 Difference]: Without dead ends: 22237 [2021-03-11 00:27:44,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1007.8ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:27:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22237 states. [2021-03-11 00:27:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22237 to 11719. [2021-03-11 00:27:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11719 states, 11718 states have (on average 3.8372589179040792) internal successors, (44965), 11718 states have internal predecessors, (44965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11719 states to 11719 states and 44965 transitions. [2021-03-11 00:27:44,837 INFO L78 Accepts]: Start accepts. Automaton has 11719 states and 44965 transitions. Word has length 28 [2021-03-11 00:27:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:44,837 INFO L480 AbstractCegarLoop]: Abstraction has 11719 states and 44965 transitions. [2021-03-11 00:27:44,837 INFO L481 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) [2021-03-11 00:27:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 11719 states and 44965 transitions. [2021-03-11 00:27:44,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:44,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:44,855 INFO L519 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] [2021-03-11 00:27:45,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:45,056 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:45,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:45,056 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 101 times [2021-03-11 00:27:45,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:45,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325357251] [2021-03-11 00:27:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:45,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325357251] [2021-03-11 00:27:45,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207674697] [2021-03-11 00:27:45,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:27:45,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:27:45,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:45,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:45,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:45,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:45,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:27:45,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417990186] [2021-03-11 00:27:45,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:27:45,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:45,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:27:45,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:27:45,382 INFO L87 Difference]: Start difference. First operand 11719 states and 44965 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) [2021-03-11 00:27:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:46,935 INFO L93 Difference]: Finished difference Result 20596 states and 75154 transitions. [2021-03-11 00:27:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-11 00:27:46,936 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 [2021-03-11 00:27:46,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:46,978 INFO L225 Difference]: With dead ends: 20596 [2021-03-11 00:27:46,978 INFO L226 Difference]: Without dead ends: 20596 [2021-03-11 00:27:46,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 898.4ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:27:46,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20596 states. [2021-03-11 00:27:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20596 to 11731. [2021-03-11 00:27:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11731 states, 11730 states have (on average 3.8365728900255753) internal successors, (45003), 11730 states have internal predecessors, (45003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11731 states to 11731 states and 45003 transitions. [2021-03-11 00:27:47,269 INFO L78 Accepts]: Start accepts. Automaton has 11731 states and 45003 transitions. Word has length 28 [2021-03-11 00:27:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:47,269 INFO L480 AbstractCegarLoop]: Abstraction has 11731 states and 45003 transitions. [2021-03-11 00:27:47,269 INFO L481 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) [2021-03-11 00:27:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 11731 states and 45003 transitions. [2021-03-11 00:27:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:47,286 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:47,286 INFO L519 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] [2021-03-11 00:27:47,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:47,487 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:47,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:47,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 102 times [2021-03-11 00:27:47,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:47,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334218445] [2021-03-11 00:27:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:47,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334218445] [2021-03-11 00:27:47,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951562690] [2021-03-11 00:27:47,558 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 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 [2021-03-11 00:27:47,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:27:47,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:47,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:47,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:47,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:47,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:27:47,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136329483] [2021-03-11 00:27:47,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:27:47,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:47,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:27:47,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:27:47,828 INFO L87 Difference]: Start difference. First operand 11731 states and 45003 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) [2021-03-11 00:27:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:50,056 INFO L93 Difference]: Finished difference Result 21379 states and 77391 transitions. [2021-03-11 00:27:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-11 00:27:50,058 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 [2021-03-11 00:27:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:50,102 INFO L225 Difference]: With dead ends: 21379 [2021-03-11 00:27:50,102 INFO L226 Difference]: Without dead ends: 21379 [2021-03-11 00:27:50,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 1440.0ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-03-11 00:27:50,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21379 states. [2021-03-11 00:27:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21379 to 11839. [2021-03-11 00:27:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11839 states, 11838 states have (on average 3.829785436729177) internal successors, (45337), 11838 states have internal predecessors, (45337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11839 states to 11839 states and 45337 transitions. [2021-03-11 00:27:50,406 INFO L78 Accepts]: Start accepts. Automaton has 11839 states and 45337 transitions. Word has length 28 [2021-03-11 00:27:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:50,406 INFO L480 AbstractCegarLoop]: Abstraction has 11839 states and 45337 transitions. [2021-03-11 00:27:50,406 INFO L481 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) [2021-03-11 00:27:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 11839 states and 45337 transitions. [2021-03-11 00:27:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:50,424 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:50,424 INFO L519 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] [2021-03-11 00:27:50,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-03-11 00:27:50,624 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 103 times [2021-03-11 00:27:50,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:50,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486671747] [2021-03-11 00:27:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:27:50,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486671747] [2021-03-11 00:27:50,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881255549] [2021-03-11 00:27:50,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:27:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:50,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:50,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:50,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:50,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:27:50,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856019485] [2021-03-11 00:27:50,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:27:50,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:50,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:27:50,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:27:50,938 INFO L87 Difference]: Start difference. First operand 11839 states and 45337 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) [2021-03-11 00:27:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:52,988 INFO L93 Difference]: Finished difference Result 20760 states and 75687 transitions. [2021-03-11 00:27:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:27:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:27:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:53,029 INFO L225 Difference]: With dead ends: 20760 [2021-03-11 00:27:53,030 INFO L226 Difference]: Without dead ends: 20756 [2021-03-11 00:27:53,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1211.0ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:27:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20756 states. [2021-03-11 00:27:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20756 to 11765. [2021-03-11 00:27:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11765 states, 11764 states have (on average 3.833560013600816) internal successors, (45098), 11764 states have internal predecessors, (45098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:53,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11765 states to 11765 states and 45098 transitions. [2021-03-11 00:27:53,302 INFO L78 Accepts]: Start accepts. Automaton has 11765 states and 45098 transitions. Word has length 28 [2021-03-11 00:27:53,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:53,302 INFO L480 AbstractCegarLoop]: Abstraction has 11765 states and 45098 transitions. [2021-03-11 00:27:53,302 INFO L481 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) [2021-03-11 00:27:53,302 INFO L276 IsEmpty]: Start isEmpty. Operand 11765 states and 45098 transitions. [2021-03-11 00:27:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:53,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:53,319 INFO L519 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] [2021-03-11 00:27:53,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-03-11 00:27:53,520 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 104 times [2021-03-11 00:27:53,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:53,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801421889] [2021-03-11 00:27:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:53,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801421889] [2021-03-11 00:27:53,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580399790] [2021-03-11 00:27:53,601 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 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 [2021-03-11 00:27:53,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:27:53,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:53,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:53,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:53,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:53,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:27:53,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025946058] [2021-03-11 00:27:53,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:27:53,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:53,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:27:53,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:27:53,864 INFO L87 Difference]: Start difference. First operand 11765 states and 45098 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) [2021-03-11 00:27:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:56,064 INFO L93 Difference]: Finished difference Result 20065 states and 72452 transitions. [2021-03-11 00:27:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-11 00:27:56,066 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 [2021-03-11 00:27:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:56,105 INFO L225 Difference]: With dead ends: 20065 [2021-03-11 00:27:56,105 INFO L226 Difference]: Without dead ends: 20065 [2021-03-11 00:27:56,105 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 1387.3ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-03-11 00:27:56,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20065 states. [2021-03-11 00:27:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20065 to 11992. [2021-03-11 00:27:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11992 states, 11991 states have (on average 3.8358769076807606) internal successors, (45996), 11991 states have internal predecessors, (45996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11992 states to 11992 states and 45996 transitions. [2021-03-11 00:27:56,461 INFO L78 Accepts]: Start accepts. Automaton has 11992 states and 45996 transitions. Word has length 28 [2021-03-11 00:27:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:56,461 INFO L480 AbstractCegarLoop]: Abstraction has 11992 states and 45996 transitions. [2021-03-11 00:27:56,461 INFO L481 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) [2021-03-11 00:27:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 11992 states and 45996 transitions. [2021-03-11 00:27:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:56,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:56,480 INFO L519 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] [2021-03-11 00:27:56,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:56,681 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:56,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 105 times [2021-03-11 00:27:56,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:56,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697616278] [2021-03-11 00:27:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:56,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697616278] [2021-03-11 00:27:56,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716354533] [2021-03-11 00:27:56,768 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 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 [2021-03-11 00:27:56,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:27:56,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:56,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:56,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:57,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:57,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:27:57,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112922291] [2021-03-11 00:27:57,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:27:57,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:57,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:27:57,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:27:57,021 INFO L87 Difference]: Start difference. First operand 11992 states and 45996 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) [2021-03-11 00:27:58,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:58,973 INFO L93 Difference]: Finished difference Result 19596 states and 71161 transitions. [2021-03-11 00:27:58,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-11 00:27:58,976 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 [2021-03-11 00:27:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:59,015 INFO L225 Difference]: With dead ends: 19596 [2021-03-11 00:27:59,016 INFO L226 Difference]: Without dead ends: 19584 [2021-03-11 00:27:59,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1249.1ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:27:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19584 states. [2021-03-11 00:27:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19584 to 12094. [2021-03-11 00:27:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12094 states, 12093 states have (on average 3.8302323658314728) internal successors, (46319), 12093 states have internal predecessors, (46319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12094 states to 12094 states and 46319 transitions. [2021-03-11 00:27:59,299 INFO L78 Accepts]: Start accepts. Automaton has 12094 states and 46319 transitions. Word has length 28 [2021-03-11 00:27:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:59,300 INFO L480 AbstractCegarLoop]: Abstraction has 12094 states and 46319 transitions. [2021-03-11 00:27:59,300 INFO L481 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) [2021-03-11 00:27:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 12094 states and 46319 transitions. [2021-03-11 00:27:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:27:59,318 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:59,318 INFO L519 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] [2021-03-11 00:27:59,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-03-11 00:27:59,518 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 73 times [2021-03-11 00:27:59,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:59,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129120833] [2021-03-11 00:27:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:59,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129120833] [2021-03-11 00:27:59,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112499739] [2021-03-11 00:27:59,617 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 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 [2021-03-11 00:27:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:59,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:27:59,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:59,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:59,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-11 00:27:59,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352992346] [2021-03-11 00:27:59,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:27:59,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:59,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:27:59,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:27:59,824 INFO L87 Difference]: Start difference. First operand 12094 states and 46319 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) [2021-03-11 00:28:00,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:00,769 INFO L93 Difference]: Finished difference Result 17012 states and 63246 transitions. [2021-03-11 00:28:00,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:28:00,771 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 [2021-03-11 00:28:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:00,807 INFO L225 Difference]: With dead ends: 17012 [2021-03-11 00:28:00,808 INFO L226 Difference]: Without dead ends: 17012 [2021-03-11 00:28:00,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 577.8ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:28:00,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17012 states. [2021-03-11 00:28:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17012 to 12166. [2021-03-11 00:28:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12166 states, 12165 states have (on average 3.8256473489519114) internal successors, (46539), 12165 states have internal predecessors, (46539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12166 states to 12166 states and 46539 transitions. [2021-03-11 00:28:01,108 INFO L78 Accepts]: Start accepts. Automaton has 12166 states and 46539 transitions. Word has length 28 [2021-03-11 00:28:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:01,108 INFO L480 AbstractCegarLoop]: Abstraction has 12166 states and 46539 transitions. [2021-03-11 00:28:01,108 INFO L481 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) [2021-03-11 00:28:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 12166 states and 46539 transitions. [2021-03-11 00:28:01,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:01,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:01,129 INFO L519 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] [2021-03-11 00:28:01,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:01,330 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:01,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:01,330 INFO L82 PathProgramCache]: Analyzing trace with hash 149924120, now seen corresponding path program 74 times [2021-03-11 00:28:01,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:01,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817357601] [2021-03-11 00:28:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:01,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817357601] [2021-03-11 00:28:01,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668664591] [2021-03-11 00:28:01,409 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 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 [2021-03-11 00:28:01,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:28:01,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:01,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:28:01,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:01,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:01,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-03-11 00:28:01,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85385263] [2021-03-11 00:28:01,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:28:01,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:01,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:28:01,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:28:01,683 INFO L87 Difference]: Start difference. First operand 12166 states and 46539 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) [2021-03-11 00:28:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:02,552 INFO L93 Difference]: Finished difference Result 15303 states and 56668 transitions. [2021-03-11 00:28:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:28:02,554 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 [2021-03-11 00:28:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:02,585 INFO L225 Difference]: With dead ends: 15303 [2021-03-11 00:28:02,585 INFO L226 Difference]: Without dead ends: 15252 [2021-03-11 00:28:02,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 646.2ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:28:02,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15252 states. [2021-03-11 00:28:02,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15252 to 11807. [2021-03-11 00:28:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11807 states, 11806 states have (on average 3.8175503981026595) internal successors, (45070), 11806 states have internal predecessors, (45070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11807 states to 11807 states and 45070 transitions. [2021-03-11 00:28:02,801 INFO L78 Accepts]: Start accepts. Automaton has 11807 states and 45070 transitions. Word has length 28 [2021-03-11 00:28:02,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:02,801 INFO L480 AbstractCegarLoop]: Abstraction has 11807 states and 45070 transitions. [2021-03-11 00:28:02,801 INFO L481 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) [2021-03-11 00:28:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 11807 states and 45070 transitions. [2021-03-11 00:28:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:02,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:02,819 INFO L519 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] [2021-03-11 00:28:03,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:03,020 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:03,020 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 75 times [2021-03-11 00:28:03,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:03,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349174293] [2021-03-11 00:28:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:03,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349174293] [2021-03-11 00:28:03,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105225622] [2021-03-11 00:28:03,093 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 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 [2021-03-11 00:28:03,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:28:03,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:03,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:28:03,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:03,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:03,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:28:03,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833104952] [2021-03-11 00:28:03,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:28:03,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:03,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:28:03,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:28:03,283 INFO L87 Difference]: Start difference. First operand 11807 states and 45070 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) [2021-03-11 00:28:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:04,327 INFO L93 Difference]: Finished difference Result 17683 states and 64727 transitions. [2021-03-11 00:28:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:28:04,329 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 [2021-03-11 00:28:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:04,365 INFO L225 Difference]: With dead ends: 17683 [2021-03-11 00:28:04,365 INFO L226 Difference]: Without dead ends: 17683 [2021-03-11 00:28:04,365 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 641.5ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:28:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17683 states. [2021-03-11 00:28:04,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17683 to 12145. [2021-03-11 00:28:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12145 states, 12144 states have (on average 3.799324769433465) internal successors, (46139), 12144 states have internal predecessors, (46139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12145 states to 12145 states and 46139 transitions. [2021-03-11 00:28:04,722 INFO L78 Accepts]: Start accepts. Automaton has 12145 states and 46139 transitions. Word has length 28 [2021-03-11 00:28:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:04,722 INFO L480 AbstractCegarLoop]: Abstraction has 12145 states and 46139 transitions. [2021-03-11 00:28:04,722 INFO L481 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) [2021-03-11 00:28:04,723 INFO L276 IsEmpty]: Start isEmpty. Operand 12145 states and 46139 transitions. [2021-03-11 00:28:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:04,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:04,741 INFO L519 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] [2021-03-11 00:28:04,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:04,951 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:04,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:04,951 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 76 times [2021-03-11 00:28:04,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:04,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843485134] [2021-03-11 00:28:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:05,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843485134] [2021-03-11 00:28:05,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954704399] [2021-03-11 00:28:05,024 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 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 [2021-03-11 00:28:05,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:28:05,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:05,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:28:05,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:05,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:05,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:28:05,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521105795] [2021-03-11 00:28:05,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:28:05,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:05,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:28:05,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:28:05,201 INFO L87 Difference]: Start difference. First operand 12145 states and 46139 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) [2021-03-11 00:28:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:06,107 INFO L93 Difference]: Finished difference Result 17151 states and 63339 transitions. [2021-03-11 00:28:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:28:06,109 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 [2021-03-11 00:28:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:06,144 INFO L225 Difference]: With dead ends: 17151 [2021-03-11 00:28:06,144 INFO L226 Difference]: Without dead ends: 17143 [2021-03-11 00:28:06,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:28:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17143 states. [2021-03-11 00:28:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17143 to 12085. [2021-03-11 00:28:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12085 states, 12084 states have (on average 3.8013075140681893) internal successors, (45935), 12084 states have internal predecessors, (45935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12085 states to 12085 states and 45935 transitions. [2021-03-11 00:28:06,400 INFO L78 Accepts]: Start accepts. Automaton has 12085 states and 45935 transitions. Word has length 28 [2021-03-11 00:28:06,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:06,400 INFO L480 AbstractCegarLoop]: Abstraction has 12085 states and 45935 transitions. [2021-03-11 00:28:06,400 INFO L481 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) [2021-03-11 00:28:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 12085 states and 45935 transitions. [2021-03-11 00:28:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:06,418 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:06,418 INFO L519 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] [2021-03-11 00:28:06,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:06,618 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:06,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 77 times [2021-03-11 00:28:06,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:06,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419140795] [2021-03-11 00:28:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:06,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419140795] [2021-03-11 00:28:06,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957759337] [2021-03-11 00:28:06,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:28:06,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:28:06,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:06,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:28:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:06,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:06,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-11 00:28:06,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140537562] [2021-03-11 00:28:06,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:06,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:06,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:06,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:06,875 INFO L87 Difference]: Start difference. First operand 12085 states and 45935 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) [2021-03-11 00:28:07,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:07,794 INFO L93 Difference]: Finished difference Result 17051 states and 63051 transitions. [2021-03-11 00:28:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:28:07,796 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 [2021-03-11 00:28:07,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:07,829 INFO L225 Difference]: With dead ends: 17051 [2021-03-11 00:28:07,829 INFO L226 Difference]: Without dead ends: 17039 [2021-03-11 00:28:07,829 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 535.3ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:28:07,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17039 states. [2021-03-11 00:28:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17039 to 12051. [2021-03-11 00:28:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12051 states, 12050 states have (on average 3.8034854771784232) internal successors, (45832), 12050 states have internal predecessors, (45832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12051 states to 12051 states and 45832 transitions. [2021-03-11 00:28:08,069 INFO L78 Accepts]: Start accepts. Automaton has 12051 states and 45832 transitions. Word has length 28 [2021-03-11 00:28:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:08,069 INFO L480 AbstractCegarLoop]: Abstraction has 12051 states and 45832 transitions. [2021-03-11 00:28:08,069 INFO L481 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) [2021-03-11 00:28:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 12051 states and 45832 transitions. [2021-03-11 00:28:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:08,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:08,087 INFO L519 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] [2021-03-11 00:28:08,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-03-11 00:28:08,287 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:08,287 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 78 times [2021-03-11 00:28:08,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:08,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653881012] [2021-03-11 00:28:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:08,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653881012] [2021-03-11 00:28:08,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789742695] [2021-03-11 00:28:08,361 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 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 [2021-03-11 00:28:08,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:28:08,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:08,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:28:08,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:08,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:08,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:28:08,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560977013] [2021-03-11 00:28:08,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:28:08,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:08,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:28:08,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:28:08,620 INFO L87 Difference]: Start difference. First operand 12051 states and 45832 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) [2021-03-11 00:28:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:10,664 INFO L93 Difference]: Finished difference Result 23232 states and 83078 transitions. [2021-03-11 00:28:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:28:10,666 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 [2021-03-11 00:28:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:10,714 INFO L225 Difference]: With dead ends: 23232 [2021-03-11 00:28:10,714 INFO L226 Difference]: Without dead ends: 23232 [2021-03-11 00:28:10,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1177.7ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:28:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23232 states. [2021-03-11 00:28:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23232 to 12031. [2021-03-11 00:28:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12031 states, 12030 states have (on average 3.8021612635078967) internal successors, (45740), 12030 states have internal predecessors, (45740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12031 states to 12031 states and 45740 transitions. [2021-03-11 00:28:11,002 INFO L78 Accepts]: Start accepts. Automaton has 12031 states and 45740 transitions. Word has length 28 [2021-03-11 00:28:11,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:11,002 INFO L480 AbstractCegarLoop]: Abstraction has 12031 states and 45740 transitions. [2021-03-11 00:28:11,002 INFO L481 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) [2021-03-11 00:28:11,002 INFO L276 IsEmpty]: Start isEmpty. Operand 12031 states and 45740 transitions. [2021-03-11 00:28:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:11,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:11,020 INFO L519 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] [2021-03-11 00:28:11,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:11,220 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:11,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:11,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 106 times [2021-03-11 00:28:11,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:11,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628657375] [2021-03-11 00:28:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:11,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628657375] [2021-03-11 00:28:11,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936549035] [2021-03-11 00:28:11,284 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 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 [2021-03-11 00:28:11,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:28:11,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:11,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:28:11,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:11,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:11,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-11 00:28:11,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388583230] [2021-03-11 00:28:11,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:28:11,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:11,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:28:11,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:28:11,541 INFO L87 Difference]: Start difference. First operand 12031 states and 45740 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) [2021-03-11 00:28:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:13,161 INFO L93 Difference]: Finished difference Result 19093 states and 69327 transitions. [2021-03-11 00:28:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:28:13,164 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 [2021-03-11 00:28:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:13,202 INFO L225 Difference]: With dead ends: 19093 [2021-03-11 00:28:13,202 INFO L226 Difference]: Without dead ends: 19080 [2021-03-11 00:28:13,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 866.0ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:28:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19080 states. [2021-03-11 00:28:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19080 to 13545. [2021-03-11 00:28:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13545 states, 13544 states have (on average 3.87322799763733) internal successors, (52459), 13544 states have internal predecessors, (52459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13545 states to 13545 states and 52459 transitions. [2021-03-11 00:28:13,599 INFO L78 Accepts]: Start accepts. Automaton has 13545 states and 52459 transitions. Word has length 28 [2021-03-11 00:28:13,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:13,599 INFO L480 AbstractCegarLoop]: Abstraction has 13545 states and 52459 transitions. [2021-03-11 00:28:13,599 INFO L481 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) [2021-03-11 00:28:13,600 INFO L276 IsEmpty]: Start isEmpty. Operand 13545 states and 52459 transitions. [2021-03-11 00:28:13,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:13,619 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:13,619 INFO L519 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] [2021-03-11 00:28:13,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-03-11 00:28:13,820 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:13,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:13,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 107 times [2021-03-11 00:28:13,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:13,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502901421] [2021-03-11 00:28:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:13,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502901421] [2021-03-11 00:28:13,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015360922] [2021-03-11 00:28:13,902 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 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 [2021-03-11 00:28:13,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:28:13,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:13,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:28:13,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:14,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:14,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-11 00:28:14,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959242225] [2021-03-11 00:28:14,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:28:14,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:14,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:28:14,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:28:14,195 INFO L87 Difference]: Start difference. First operand 13545 states and 52459 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) [2021-03-11 00:28:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:15,814 INFO L93 Difference]: Finished difference Result 19245 states and 69750 transitions. [2021-03-11 00:28:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:28:15,816 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 [2021-03-11 00:28:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:15,856 INFO L225 Difference]: With dead ends: 19245 [2021-03-11 00:28:15,856 INFO L226 Difference]: Without dead ends: 19230 [2021-03-11 00:28:15,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 981.0ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:28:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19230 states. [2021-03-11 00:28:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19230 to 13512. [2021-03-11 00:28:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13512 states, 13511 states have (on average 3.872030197616757) internal successors, (52315), 13511 states have internal predecessors, (52315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13512 states to 13512 states and 52315 transitions. [2021-03-11 00:28:16,170 INFO L78 Accepts]: Start accepts. Automaton has 13512 states and 52315 transitions. Word has length 28 [2021-03-11 00:28:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:16,171 INFO L480 AbstractCegarLoop]: Abstraction has 13512 states and 52315 transitions. [2021-03-11 00:28:16,171 INFO L481 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) [2021-03-11 00:28:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 13512 states and 52315 transitions. [2021-03-11 00:28:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:16,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:16,192 INFO L519 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] [2021-03-11 00:28:16,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-03-11 00:28:16,392 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 108 times [2021-03-11 00:28:16,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:16,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488421208] [2021-03-11 00:28:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:16,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488421208] [2021-03-11 00:28:16,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562855511] [2021-03-11 00:28:16,458 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 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 [2021-03-11 00:28:16,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:28:16,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:28:16,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:16,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:16,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-11 00:28:16,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667735306] [2021-03-11 00:28:16,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:16,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:16,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:16,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:16,684 INFO L87 Difference]: Start difference. First operand 13512 states and 52315 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) [2021-03-11 00:28:18,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:18,076 INFO L93 Difference]: Finished difference Result 21572 states and 78297 transitions. [2021-03-11 00:28:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:28:18,078 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 [2021-03-11 00:28:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:18,119 INFO L225 Difference]: With dead ends: 21572 [2021-03-11 00:28:18,119 INFO L226 Difference]: Without dead ends: 21559 [2021-03-11 00:28:18,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 776.7ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:28:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21559 states. [2021-03-11 00:28:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21559 to 13594. [2021-03-11 00:28:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13594 states, 13593 states have (on average 3.877731185168837) internal successors, (52710), 13593 states have internal predecessors, (52710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13594 states to 13594 states and 52710 transitions. [2021-03-11 00:28:18,547 INFO L78 Accepts]: Start accepts. Automaton has 13594 states and 52710 transitions. Word has length 28 [2021-03-11 00:28:18,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:18,547 INFO L480 AbstractCegarLoop]: Abstraction has 13594 states and 52710 transitions. [2021-03-11 00:28:18,547 INFO L481 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) [2021-03-11 00:28:18,547 INFO L276 IsEmpty]: Start isEmpty. Operand 13594 states and 52710 transitions. [2021-03-11 00:28:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:18,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:18,569 INFO L519 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] [2021-03-11 00:28:18,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-03-11 00:28:18,770 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:18,770 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 109 times [2021-03-11 00:28:18,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:18,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071231552] [2021-03-11 00:28:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:18,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071231552] [2021-03-11 00:28:18,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528697423] [2021-03-11 00:28:18,833 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 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 [2021-03-11 00:28:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:18,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:28:18,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:19,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:19,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-11 00:28:19,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312299981] [2021-03-11 00:28:19,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:19,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:19,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:19,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:19,088 INFO L87 Difference]: Start difference. First operand 13594 states and 52710 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) [2021-03-11 00:28:20,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:20,725 INFO L93 Difference]: Finished difference Result 22871 states and 82348 transitions. [2021-03-11 00:28:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:28:20,727 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 [2021-03-11 00:28:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:20,774 INFO L225 Difference]: With dead ends: 22871 [2021-03-11 00:28:20,774 INFO L226 Difference]: Without dead ends: 22871 [2021-03-11 00:28:20,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 972.0ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:28:20,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22871 states. [2021-03-11 00:28:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22871 to 13618. [2021-03-11 00:28:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13618 states, 13617 states have (on average 3.8742748035543806) internal successors, (52756), 13617 states have internal predecessors, (52756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13618 states to 13618 states and 52756 transitions. [2021-03-11 00:28:21,120 INFO L78 Accepts]: Start accepts. Automaton has 13618 states and 52756 transitions. Word has length 28 [2021-03-11 00:28:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:21,120 INFO L480 AbstractCegarLoop]: Abstraction has 13618 states and 52756 transitions. [2021-03-11 00:28:21,120 INFO L481 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) [2021-03-11 00:28:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 13618 states and 52756 transitions. [2021-03-11 00:28:21,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:21,141 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:21,141 INFO L519 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] [2021-03-11 00:28:21,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-03-11 00:28:21,342 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:21,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:21,342 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 79 times [2021-03-11 00:28:21,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:21,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464142299] [2021-03-11 00:28:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:21,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464142299] [2021-03-11 00:28:21,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485617174] [2021-03-11 00:28:21,422 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 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 [2021-03-11 00:28:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:28:21,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:21,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:21,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-11 00:28:21,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180321467] [2021-03-11 00:28:21,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:28:21,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:21,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:28:21,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:28:21,662 INFO L87 Difference]: Start difference. First operand 13618 states and 52756 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) [2021-03-11 00:28:23,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:23,697 INFO L93 Difference]: Finished difference Result 23672 states and 87338 transitions. [2021-03-11 00:28:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-11 00:28:23,699 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 [2021-03-11 00:28:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:23,750 INFO L225 Difference]: With dead ends: 23672 [2021-03-11 00:28:23,750 INFO L226 Difference]: Without dead ends: 23668 [2021-03-11 00:28:23,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 1247.1ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:28:23,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23668 states. [2021-03-11 00:28:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23668 to 13914. [2021-03-11 00:28:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13914 states, 13913 states have (on average 3.862718320994753) internal successors, (53742), 13913 states have internal predecessors, (53742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13914 states to 13914 states and 53742 transitions. [2021-03-11 00:28:24,176 INFO L78 Accepts]: Start accepts. Automaton has 13914 states and 53742 transitions. Word has length 28 [2021-03-11 00:28:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:24,176 INFO L480 AbstractCegarLoop]: Abstraction has 13914 states and 53742 transitions. [2021-03-11 00:28:24,176 INFO L481 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) [2021-03-11 00:28:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 13914 states and 53742 transitions. [2021-03-11 00:28:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:24,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:24,199 INFO L519 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] [2021-03-11 00:28:24,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:24,399 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:24,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:24,399 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 110 times [2021-03-11 00:28:24,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:24,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382568062] [2021-03-11 00:28:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:24,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382568062] [2021-03-11 00:28:24,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706591007] [2021-03-11 00:28:24,478 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 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 [2021-03-11 00:28:24,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:28:24,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:24,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:28:24,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:24,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:24,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:28:24,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365399405] [2021-03-11 00:28:24,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:24,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:24,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:24,705 INFO L87 Difference]: Start difference. First operand 13914 states and 53742 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) [2021-03-11 00:28:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:26,128 INFO L93 Difference]: Finished difference Result 20142 states and 74157 transitions. [2021-03-11 00:28:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:28:26,131 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 [2021-03-11 00:28:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:26,172 INFO L225 Difference]: With dead ends: 20142 [2021-03-11 00:28:26,172 INFO L226 Difference]: Without dead ends: 20119 [2021-03-11 00:28:26,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 811.5ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:28:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20119 states. [2021-03-11 00:28:26,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20119 to 13940. [2021-03-11 00:28:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13940 states, 13939 states have (on average 3.8696463160915417) internal successors, (53939), 13939 states have internal predecessors, (53939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13940 states to 13940 states and 53939 transitions. [2021-03-11 00:28:26,472 INFO L78 Accepts]: Start accepts. Automaton has 13940 states and 53939 transitions. Word has length 28 [2021-03-11 00:28:26,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:26,472 INFO L480 AbstractCegarLoop]: Abstraction has 13940 states and 53939 transitions. [2021-03-11 00:28:26,473 INFO L481 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) [2021-03-11 00:28:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 13940 states and 53939 transitions. [2021-03-11 00:28:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:26,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:26,493 INFO L519 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] [2021-03-11 00:28:26,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-03-11 00:28:26,695 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 111 times [2021-03-11 00:28:26,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:26,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474813549] [2021-03-11 00:28:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:26,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474813549] [2021-03-11 00:28:26,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856350222] [2021-03-11 00:28:26,767 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 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 [2021-03-11 00:28:26,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:28:26,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:26,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:28:26,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:26,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:26,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:28:26,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023462220] [2021-03-11 00:28:26,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:26,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:26,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:26,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:26,995 INFO L87 Difference]: Start difference. First operand 13940 states and 53939 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) [2021-03-11 00:28:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:28,671 INFO L93 Difference]: Finished difference Result 19597 states and 71188 transitions. [2021-03-11 00:28:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:28:28,673 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 [2021-03-11 00:28:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:28,714 INFO L225 Difference]: With dead ends: 19597 [2021-03-11 00:28:28,714 INFO L226 Difference]: Without dead ends: 19597 [2021-03-11 00:28:28,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1002.6ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:28:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19597 states. [2021-03-11 00:28:29,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19597 to 13893. [2021-03-11 00:28:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13893 states, 13892 states have (on average 3.8620069104520587) internal successors, (53651), 13892 states have internal predecessors, (53651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13893 states to 13893 states and 53651 transitions. [2021-03-11 00:28:29,081 INFO L78 Accepts]: Start accepts. Automaton has 13893 states and 53651 transitions. Word has length 28 [2021-03-11 00:28:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:29,081 INFO L480 AbstractCegarLoop]: Abstraction has 13893 states and 53651 transitions. [2021-03-11 00:28:29,081 INFO L481 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) [2021-03-11 00:28:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 13893 states and 53651 transitions. [2021-03-11 00:28:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:29,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:29,102 INFO L519 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] [2021-03-11 00:28:29,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-03-11 00:28:29,315 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:29,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:29,315 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 112 times [2021-03-11 00:28:29,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:29,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15864574] [2021-03-11 00:28:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:29,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15864574] [2021-03-11 00:28:29,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471221643] [2021-03-11 00:28:29,389 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 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 [2021-03-11 00:28:29,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:28:29,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:29,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:28:29,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:29,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:29,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:28:29,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364946816] [2021-03-11 00:28:29,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:29,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:29,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:29,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:29,641 INFO L87 Difference]: Start difference. First operand 13893 states and 53651 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) [2021-03-11 00:28:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:31,224 INFO L93 Difference]: Finished difference Result 20900 states and 76357 transitions. [2021-03-11 00:28:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:28:31,226 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 [2021-03-11 00:28:31,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:31,267 INFO L225 Difference]: With dead ends: 20900 [2021-03-11 00:28:31,268 INFO L226 Difference]: Without dead ends: 20900 [2021-03-11 00:28:31,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 906.1ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:28:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20900 states. [2021-03-11 00:28:31,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20900 to 14606. [2021-03-11 00:28:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14606 states, 14605 states have (on average 3.848134200616227) internal successors, (56202), 14605 states have internal predecessors, (56202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 56202 transitions. [2021-03-11 00:28:31,578 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 56202 transitions. Word has length 28 [2021-03-11 00:28:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:31,578 INFO L480 AbstractCegarLoop]: Abstraction has 14606 states and 56202 transitions. [2021-03-11 00:28:31,578 INFO L481 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) [2021-03-11 00:28:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 56202 transitions. [2021-03-11 00:28:31,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:31,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:31,600 INFO L519 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] [2021-03-11 00:28:31,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:31,800 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:31,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:31,800 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 113 times [2021-03-11 00:28:31,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:31,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773306288] [2021-03-11 00:28:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:31,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773306288] [2021-03-11 00:28:31,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127030132] [2021-03-11 00:28:31,876 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 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 [2021-03-11 00:28:31,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:28:31,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:31,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:28:31,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:32,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:32,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:28:32,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324201451] [2021-03-11 00:28:32,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:28:32,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:28:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:28:32,131 INFO L87 Difference]: Start difference. First operand 14606 states and 56202 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) [2021-03-11 00:28:34,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:34,091 INFO L93 Difference]: Finished difference Result 23435 states and 84344 transitions. [2021-03-11 00:28:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:28:34,094 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 [2021-03-11 00:28:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:34,142 INFO L225 Difference]: With dead ends: 23435 [2021-03-11 00:28:34,142 INFO L226 Difference]: Without dead ends: 23435 [2021-03-11 00:28:34,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1156.0ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:28:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23435 states. [2021-03-11 00:28:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23435 to 14836. [2021-03-11 00:28:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14836 states, 14835 states have (on average 3.8591843613077184) internal successors, (57251), 14835 states have internal predecessors, (57251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14836 states to 14836 states and 57251 transitions. [2021-03-11 00:28:34,564 INFO L78 Accepts]: Start accepts. Automaton has 14836 states and 57251 transitions. Word has length 28 [2021-03-11 00:28:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:34,565 INFO L480 AbstractCegarLoop]: Abstraction has 14836 states and 57251 transitions. [2021-03-11 00:28:34,565 INFO L481 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) [2021-03-11 00:28:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 14836 states and 57251 transitions. [2021-03-11 00:28:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:34,588 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:34,588 INFO L519 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] [2021-03-11 00:28:34,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-03-11 00:28:34,789 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:34,789 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 80 times [2021-03-11 00:28:34,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:34,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666226825] [2021-03-11 00:28:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:34,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666226825] [2021-03-11 00:28:34,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026438486] [2021-03-11 00:28:34,872 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 [2021-03-11 00:28:34,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:28:34,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:34,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:28:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:35,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:35,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:28:35,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663720291] [2021-03-11 00:28:35,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:28:35,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:35,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:28:35,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:28:35,184 INFO L87 Difference]: Start difference. First operand 14836 states and 57251 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) [2021-03-11 00:28:38,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:38,402 INFO L93 Difference]: Finished difference Result 41598 states and 149527 transitions. [2021-03-11 00:28:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-11 00:28:38,402 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 [2021-03-11 00:28:38,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:38,494 INFO L225 Difference]: With dead ends: 41598 [2021-03-11 00:28:38,494 INFO L226 Difference]: Without dead ends: 41598 [2021-03-11 00:28:38,495 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 2068.7ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-03-11 00:28:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41598 states. [2021-03-11 00:28:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41598 to 16192. [2021-03-11 00:28:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16192 states, 16191 states have (on average 3.905564819961707) internal successors, (63235), 16191 states have internal predecessors, (63235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16192 states to 16192 states and 63235 transitions. [2021-03-11 00:28:39,052 INFO L78 Accepts]: Start accepts. Automaton has 16192 states and 63235 transitions. Word has length 28 [2021-03-11 00:28:39,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:39,052 INFO L480 AbstractCegarLoop]: Abstraction has 16192 states and 63235 transitions. [2021-03-11 00:28:39,052 INFO L481 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) [2021-03-11 00:28:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 16192 states and 63235 transitions. [2021-03-11 00:28:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:39,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:39,076 INFO L519 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] [2021-03-11 00:28:39,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:39,277 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 81 times [2021-03-11 00:28:39,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:39,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404174414] [2021-03-11 00:28:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:39,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404174414] [2021-03-11 00:28:39,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090997985] [2021-03-11 00:28:39,360 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 [2021-03-11 00:28:39,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:28:39,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:39,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:28:39,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:39,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:39,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:28:39,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002604070] [2021-03-11 00:28:39,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:28:39,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:39,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:28:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:28:39,669 INFO L87 Difference]: Start difference. First operand 16192 states and 63235 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) [2021-03-11 00:28:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:43,039 INFO L93 Difference]: Finished difference Result 40544 states and 146786 transitions. [2021-03-11 00:28:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-11 00:28:43,039 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 [2021-03-11 00:28:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:43,129 INFO L225 Difference]: With dead ends: 40544 [2021-03-11 00:28:43,130 INFO L226 Difference]: Without dead ends: 40544 [2021-03-11 00:28:43,130 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 2128.4ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-03-11 00:28:43,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40544 states. [2021-03-11 00:28:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40544 to 16160. [2021-03-11 00:28:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16160 states, 16159 states have (on average 3.9019122470449905) internal successors, (63051), 16159 states have internal predecessors, (63051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16160 states to 16160 states and 63051 transitions. [2021-03-11 00:28:43,683 INFO L78 Accepts]: Start accepts. Automaton has 16160 states and 63051 transitions. Word has length 28 [2021-03-11 00:28:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:43,683 INFO L480 AbstractCegarLoop]: Abstraction has 16160 states and 63051 transitions. [2021-03-11 00:28:43,683 INFO L481 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) [2021-03-11 00:28:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 16160 states and 63051 transitions. [2021-03-11 00:28:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:43,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:43,707 INFO L519 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] [2021-03-11 00:28:43,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-03-11 00:28:43,907 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:43,907 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 114 times [2021-03-11 00:28:43,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:43,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646441815] [2021-03-11 00:28:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:43,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646441815] [2021-03-11 00:28:43,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053003837] [2021-03-11 00:28:43,988 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 [2021-03-11 00:28:44,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:28:44,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:28:44,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:44,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:44,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:28:44,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781952835] [2021-03-11 00:28:44,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:28:44,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:28:44,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:28:44,172 INFO L87 Difference]: Start difference. First operand 16160 states and 63051 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) [2021-03-11 00:28:44,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:44,778 INFO L93 Difference]: Finished difference Result 25110 states and 96518 transitions. [2021-03-11 00:28:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:28:44,780 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 [2021-03-11 00:28:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:44,847 INFO L225 Difference]: With dead ends: 25110 [2021-03-11 00:28:44,847 INFO L226 Difference]: Without dead ends: 25063 [2021-03-11 00:28:44,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:28:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25063 states. [2021-03-11 00:28:45,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25063 to 20843. [2021-03-11 00:28:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20843 states, 20842 states have (on average 3.909125803665675) internal successors, (81474), 20842 states have internal predecessors, (81474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20843 states to 20843 states and 81474 transitions. [2021-03-11 00:28:45,366 INFO L78 Accepts]: Start accepts. Automaton has 20843 states and 81474 transitions. Word has length 28 [2021-03-11 00:28:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:45,366 INFO L480 AbstractCegarLoop]: Abstraction has 20843 states and 81474 transitions. [2021-03-11 00:28:45,366 INFO L481 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) [2021-03-11 00:28:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 20843 states and 81474 transitions. [2021-03-11 00:28:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:45,398 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:45,398 INFO L519 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] [2021-03-11 00:28:45,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-03-11 00:28:45,599 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:45,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:45,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 115 times [2021-03-11 00:28:45,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:45,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40964779] [2021-03-11 00:28:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:45,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40964779] [2021-03-11 00:28:45,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765354509] [2021-03-11 00:28:45,689 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 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 [2021-03-11 00:28:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:45,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:28:45,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:45,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:45,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:28:45,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455619389] [2021-03-11 00:28:45,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:28:45,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:45,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:28:45,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:28:45,932 INFO L87 Difference]: Start difference. First operand 20843 states and 81474 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) [2021-03-11 00:28:46,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:46,549 INFO L93 Difference]: Finished difference Result 23598 states and 89846 transitions. [2021-03-11 00:28:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:28:46,552 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 [2021-03-11 00:28:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:46,612 INFO L225 Difference]: With dead ends: 23598 [2021-03-11 00:28:46,612 INFO L226 Difference]: Without dead ends: 23598 [2021-03-11 00:28:46,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:28:46,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23598 states. [2021-03-11 00:28:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23598 to 20346. [2021-03-11 00:28:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20346 states, 20345 states have (on average 3.8978618825264193) internal successors, (79302), 20345 states have internal predecessors, (79302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20346 states to 20346 states and 79302 transitions. [2021-03-11 00:28:47,081 INFO L78 Accepts]: Start accepts. Automaton has 20346 states and 79302 transitions. Word has length 28 [2021-03-11 00:28:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:47,081 INFO L480 AbstractCegarLoop]: Abstraction has 20346 states and 79302 transitions. [2021-03-11 00:28:47,081 INFO L481 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) [2021-03-11 00:28:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 20346 states and 79302 transitions. [2021-03-11 00:28:47,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:47,113 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:47,113 INFO L519 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] [2021-03-11 00:28:47,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-03-11 00:28:47,314 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:47,314 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 116 times [2021-03-11 00:28:47,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:47,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993435792] [2021-03-11 00:28:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:47,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993435792] [2021-03-11 00:28:47,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316151684] [2021-03-11 00:28:47,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:28:47,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:28:47,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:47,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:28:47,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:47,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:47,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-03-11 00:28:47,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011304136] [2021-03-11 00:28:47,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:28:47,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:47,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:28:47,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:28:47,802 INFO L87 Difference]: Start difference. First operand 20346 states and 79302 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) [2021-03-11 00:28:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:50,224 INFO L93 Difference]: Finished difference Result 32302 states and 119801 transitions. [2021-03-11 00:28:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:28:50,226 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 [2021-03-11 00:28:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:50,313 INFO L225 Difference]: With dead ends: 32302 [2021-03-11 00:28:50,313 INFO L226 Difference]: Without dead ends: 32302 [2021-03-11 00:28:50,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1435.9ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:28:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32302 states. [2021-03-11 00:28:50,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32302 to 20412. [2021-03-11 00:28:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20412 states, 20411 states have (on average 3.895938464553427) internal successors, (79520), 20411 states have internal predecessors, (79520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20412 states to 20412 states and 79520 transitions. [2021-03-11 00:28:50,896 INFO L78 Accepts]: Start accepts. Automaton has 20412 states and 79520 transitions. Word has length 28 [2021-03-11 00:28:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:50,896 INFO L480 AbstractCegarLoop]: Abstraction has 20412 states and 79520 transitions. [2021-03-11 00:28:50,896 INFO L481 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) [2021-03-11 00:28:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 20412 states and 79520 transitions. [2021-03-11 00:28:50,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:50,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:50,925 INFO L519 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] [2021-03-11 00:28:51,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-03-11 00:28:51,126 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:51,126 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 117 times [2021-03-11 00:28:51,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:51,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189611475] [2021-03-11 00:28:51,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:51,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189611475] [2021-03-11 00:28:51,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009254523] [2021-03-11 00:28:51,249 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 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 [2021-03-11 00:28:51,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:28:51,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:51,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:28:51,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:51,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:51,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:28:51,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72677101] [2021-03-11 00:28:51,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:28:51,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:51,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:28:51,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:28:51,609 INFO L87 Difference]: Start difference. First operand 20412 states and 79520 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) [2021-03-11 00:28:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:55,567 INFO L93 Difference]: Finished difference Result 41452 states and 151987 transitions. [2021-03-11 00:28:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-03-11 00:28:55,569 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 [2021-03-11 00:28:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:55,678 INFO L225 Difference]: With dead ends: 41452 [2021-03-11 00:28:55,678 INFO L226 Difference]: Without dead ends: 41452 [2021-03-11 00:28:55,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 2490.0ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-03-11 00:28:55,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41452 states. [2021-03-11 00:28:56,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41452 to 20417. [2021-03-11 00:28:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20417 states, 20416 states have (on average 3.8979721786833856) internal successors, (79581), 20416 states have internal predecessors, (79581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20417 states to 20417 states and 79581 transitions. [2021-03-11 00:28:56,427 INFO L78 Accepts]: Start accepts. Automaton has 20417 states and 79581 transitions. Word has length 28 [2021-03-11 00:28:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:56,428 INFO L480 AbstractCegarLoop]: Abstraction has 20417 states and 79581 transitions. [2021-03-11 00:28:56,428 INFO L481 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) [2021-03-11 00:28:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 20417 states and 79581 transitions. [2021-03-11 00:28:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:28:56,465 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:56,465 INFO L519 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] [2021-03-11 00:28:56,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:56,665 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:56,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:56,666 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 118 times [2021-03-11 00:28:56,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:56,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285956930] [2021-03-11 00:28:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:56,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285956930] [2021-03-11 00:28:56,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172432617] [2021-03-11 00:28:56,769 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 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 [2021-03-11 00:28:56,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:28:56,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:56,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:28:56,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:57,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:57,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:28:57,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746559898] [2021-03-11 00:28:57,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:28:57,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:57,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:28:57,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:28:57,126 INFO L87 Difference]: Start difference. First operand 20417 states and 79581 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) [2021-03-11 00:29:00,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:00,957 INFO L93 Difference]: Finished difference Result 41128 states and 151472 transitions. [2021-03-11 00:29:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-11 00:29:00,960 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 [2021-03-11 00:29:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:01,057 INFO L225 Difference]: With dead ends: 41128 [2021-03-11 00:29:01,057 INFO L226 Difference]: Without dead ends: 41128 [2021-03-11 00:29:01,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 2446.7ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-03-11 00:29:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41128 states. [2021-03-11 00:29:01,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41128 to 20205. [2021-03-11 00:29:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20205 states, 20204 states have (on average 3.8903187487626214) internal successors, (78600), 20204 states have internal predecessors, (78600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20205 states to 20205 states and 78600 transitions. [2021-03-11 00:29:01,698 INFO L78 Accepts]: Start accepts. Automaton has 20205 states and 78600 transitions. Word has length 28 [2021-03-11 00:29:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:01,698 INFO L480 AbstractCegarLoop]: Abstraction has 20205 states and 78600 transitions. [2021-03-11 00:29:01,698 INFO L481 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) [2021-03-11 00:29:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 20205 states and 78600 transitions. [2021-03-11 00:29:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:01,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:01,730 INFO L519 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] [2021-03-11 00:29:01,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-03-11 00:29:01,930 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 119 times [2021-03-11 00:29:01,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:01,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19756725] [2021-03-11 00:29:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:02,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19756725] [2021-03-11 00:29:02,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687731441] [2021-03-11 00:29:02,007 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 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 [2021-03-11 00:29:02,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:29:02,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:02,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:29:02,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:02,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-11 00:29:02,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893506247] [2021-03-11 00:29:02,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:29:02,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:02,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:29:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:29:02,288 INFO L87 Difference]: Start difference. First operand 20205 states and 78600 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) [2021-03-11 00:29:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:02,885 INFO L93 Difference]: Finished difference Result 29714 states and 111113 transitions. [2021-03-11 00:29:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:29:02,888 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 [2021-03-11 00:29:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:02,955 INFO L225 Difference]: With dead ends: 29714 [2021-03-11 00:29:02,955 INFO L226 Difference]: Without dead ends: 29697 [2021-03-11 00:29:02,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:29:02,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29697 states. [2021-03-11 00:29:03,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29697 to 20476. [2021-03-11 00:29:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20476 states, 20475 states have (on average 3.895775335775336) internal successors, (79766), 20475 states have internal predecessors, (79766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20476 states to 20476 states and 79766 transitions. [2021-03-11 00:29:03,527 INFO L78 Accepts]: Start accepts. Automaton has 20476 states and 79766 transitions. Word has length 28 [2021-03-11 00:29:03,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:03,527 INFO L480 AbstractCegarLoop]: Abstraction has 20476 states and 79766 transitions. [2021-03-11 00:29:03,527 INFO L481 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) [2021-03-11 00:29:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 20476 states and 79766 transitions. [2021-03-11 00:29:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:03,558 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:03,559 INFO L519 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] [2021-03-11 00:29:03,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:03,759 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:03,759 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 120 times [2021-03-11 00:29:03,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:03,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108432814] [2021-03-11 00:29:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:03,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108432814] [2021-03-11 00:29:03,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808718835] [2021-03-11 00:29:03,874 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 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 [2021-03-11 00:29:03,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:29:03,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:03,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:03,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:29:04,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:04,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-11 00:29:04,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458837016] [2021-03-11 00:29:04,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:29:04,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:04,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:29:04,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:29:04,141 INFO L87 Difference]: Start difference. First operand 20476 states and 79766 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) [2021-03-11 00:29:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:04,781 INFO L93 Difference]: Finished difference Result 31499 states and 116678 transitions. [2021-03-11 00:29:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:29:04,784 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 [2021-03-11 00:29:04,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:04,867 INFO L225 Difference]: With dead ends: 31499 [2021-03-11 00:29:04,867 INFO L226 Difference]: Without dead ends: 31499 [2021-03-11 00:29:04,867 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 394.6ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:29:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31499 states. [2021-03-11 00:29:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31499 to 20145. [2021-03-11 00:29:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20145 states, 20144 states have (on average 3.8810563939634632) internal successors, (78180), 20144 states have internal predecessors, (78180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20145 states to 20145 states and 78180 transitions. [2021-03-11 00:29:05,336 INFO L78 Accepts]: Start accepts. Automaton has 20145 states and 78180 transitions. Word has length 28 [2021-03-11 00:29:05,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:05,336 INFO L480 AbstractCegarLoop]: Abstraction has 20145 states and 78180 transitions. [2021-03-11 00:29:05,336 INFO L481 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) [2021-03-11 00:29:05,336 INFO L276 IsEmpty]: Start isEmpty. Operand 20145 states and 78180 transitions. [2021-03-11 00:29:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:05,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:05,364 INFO L519 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] [2021-03-11 00:29:05,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-03-11 00:29:05,565 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:05,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 121 times [2021-03-11 00:29:05,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:05,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706166315] [2021-03-11 00:29:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:05,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706166315] [2021-03-11 00:29:05,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213342235] [2021-03-11 00:29:05,682 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 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 [2021-03-11 00:29:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:29:05,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:05,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:05,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-11 00:29:05,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486925914] [2021-03-11 00:29:05,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:29:05,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:05,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:29:05,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:29:05,987 INFO L87 Difference]: Start difference. First operand 20145 states and 78180 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) [2021-03-11 00:29:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:08,133 INFO L93 Difference]: Finished difference Result 29825 states and 110934 transitions. [2021-03-11 00:29:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-11 00:29:08,136 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 [2021-03-11 00:29:08,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:08,210 INFO L225 Difference]: With dead ends: 29825 [2021-03-11 00:29:08,210 INFO L226 Difference]: Without dead ends: 29825 [2021-03-11 00:29:08,210 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1206.6ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:29:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29825 states. [2021-03-11 00:29:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29825 to 20193. [2021-03-11 00:29:08,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20193 states, 20192 states have (on average 3.879457210776545) internal successors, (78334), 20192 states have internal predecessors, (78334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20193 states to 20193 states and 78334 transitions. [2021-03-11 00:29:08,794 INFO L78 Accepts]: Start accepts. Automaton has 20193 states and 78334 transitions. Word has length 28 [2021-03-11 00:29:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:08,795 INFO L480 AbstractCegarLoop]: Abstraction has 20193 states and 78334 transitions. [2021-03-11 00:29:08,795 INFO L481 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) [2021-03-11 00:29:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 20193 states and 78334 transitions. [2021-03-11 00:29:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:08,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:08,827 INFO L519 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] [2021-03-11 00:29:09,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:09,028 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:09,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:09,028 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 122 times [2021-03-11 00:29:09,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:09,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611789135] [2021-03-11 00:29:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:09,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611789135] [2021-03-11 00:29:09,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294921957] [2021-03-11 00:29:09,139 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 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 [2021-03-11 00:29:09,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:29:09,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:09,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:29:09,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:09,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:09,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-11 00:29:09,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560801966] [2021-03-11 00:29:09,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:29:09,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:09,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:29:09,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:29:09,462 INFO L87 Difference]: Start difference. First operand 20193 states and 78334 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) [2021-03-11 00:29:12,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:12,183 INFO L93 Difference]: Finished difference Result 31497 states and 115770 transitions. [2021-03-11 00:29:12,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-11 00:29:12,186 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 [2021-03-11 00:29:12,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:12,271 INFO L225 Difference]: With dead ends: 31497 [2021-03-11 00:29:12,272 INFO L226 Difference]: Without dead ends: 31497 [2021-03-11 00:29:12,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 1694.6ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-03-11 00:29:12,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31497 states. [2021-03-11 00:29:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31497 to 20733. [2021-03-11 00:29:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20733 states, 20732 states have (on average 3.8584796449932472) internal successors, (79994), 20732 states have internal predecessors, (79994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20733 states to 20733 states and 79994 transitions. [2021-03-11 00:29:12,827 INFO L78 Accepts]: Start accepts. Automaton has 20733 states and 79994 transitions. Word has length 28 [2021-03-11 00:29:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:12,828 INFO L480 AbstractCegarLoop]: Abstraction has 20733 states and 79994 transitions. [2021-03-11 00:29:12,828 INFO L481 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) [2021-03-11 00:29:12,828 INFO L276 IsEmpty]: Start isEmpty. Operand 20733 states and 79994 transitions. [2021-03-11 00:29:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:12,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:12,860 INFO L519 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] [2021-03-11 00:29:13,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:13,060 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:13,061 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 123 times [2021-03-11 00:29:13,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:13,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057016319] [2021-03-11 00:29:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:13,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057016319] [2021-03-11 00:29:13,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632928923] [2021-03-11 00:29:13,167 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 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 [2021-03-11 00:29:13,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:29:13,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:13,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:29:13,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:13,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:13,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-11 00:29:13,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109127634] [2021-03-11 00:29:13,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:29:13,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:13,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:29:13,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:29:13,470 INFO L87 Difference]: Start difference. First operand 20733 states and 79994 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) [2021-03-11 00:29:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:15,751 INFO L93 Difference]: Finished difference Result 30547 states and 113289 transitions. [2021-03-11 00:29:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-11 00:29:15,755 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 [2021-03-11 00:29:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:15,827 INFO L225 Difference]: With dead ends: 30547 [2021-03-11 00:29:15,828 INFO L226 Difference]: Without dead ends: 30543 [2021-03-11 00:29:15,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1410.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:29:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30543 states. [2021-03-11 00:29:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30543 to 20625. [2021-03-11 00:29:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20625 states, 20624 states have (on average 3.861132660977502) internal successors, (79632), 20624 states have internal predecessors, (79632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20625 states to 20625 states and 79632 transitions. [2021-03-11 00:29:16,444 INFO L78 Accepts]: Start accepts. Automaton has 20625 states and 79632 transitions. Word has length 28 [2021-03-11 00:29:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:16,444 INFO L480 AbstractCegarLoop]: Abstraction has 20625 states and 79632 transitions. [2021-03-11 00:29:16,444 INFO L481 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) [2021-03-11 00:29:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 20625 states and 79632 transitions. [2021-03-11 00:29:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:16,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:16,478 INFO L519 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] [2021-03-11 00:29:16,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:16,679 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:16,679 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 124 times [2021-03-11 00:29:16,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:16,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632443748] [2021-03-11 00:29:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:16,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632443748] [2021-03-11 00:29:16,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024383288] [2021-03-11 00:29:16,764 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 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 [2021-03-11 00:29:16,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:16,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:16,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:16,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 00:29:17,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:17,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-03-11 00:29:17,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497626564] [2021-03-11 00:29:17,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:29:17,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:17,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:29:17,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:29:17,025 INFO L87 Difference]: Start difference. First operand 20625 states and 79632 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) [2021-03-11 00:29:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:17,551 INFO L93 Difference]: Finished difference Result 25637 states and 95562 transitions. [2021-03-11 00:29:17,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:29:17,554 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 [2021-03-11 00:29:17,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:17,611 INFO L225 Difference]: With dead ends: 25637 [2021-03-11 00:29:17,611 INFO L226 Difference]: Without dead ends: 25637 [2021-03-11 00:29:17,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 319.2ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:29:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25637 states. [2021-03-11 00:29:17,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25637 to 20910. [2021-03-11 00:29:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20910 states, 20909 states have (on average 3.8524080539480607) internal successors, (80550), 20909 states have internal predecessors, (80550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20910 states to 20910 states and 80550 transitions. [2021-03-11 00:29:18,042 INFO L78 Accepts]: Start accepts. Automaton has 20910 states and 80550 transitions. Word has length 28 [2021-03-11 00:29:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:18,042 INFO L480 AbstractCegarLoop]: Abstraction has 20910 states and 80550 transitions. [2021-03-11 00:29:18,043 INFO L481 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) [2021-03-11 00:29:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 20910 states and 80550 transitions. [2021-03-11 00:29:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:18,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:18,076 INFO L519 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] [2021-03-11 00:29:18,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-03-11 00:29:18,277 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 125 times [2021-03-11 00:29:18,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:18,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260275525] [2021-03-11 00:29:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:18,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260275525] [2021-03-11 00:29:18,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995327391] [2021-03-11 00:29:18,386 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 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 [2021-03-11 00:29:18,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:29:18,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:18,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:29:18,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:29:18,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:18,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-11 00:29:18,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784856110] [2021-03-11 00:29:18,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:18,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:18,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:18,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:18,679 INFO L87 Difference]: Start difference. First operand 20910 states and 80550 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) [2021-03-11 00:29:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:20,986 INFO L93 Difference]: Finished difference Result 31417 states and 115177 transitions. [2021-03-11 00:29:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:29:20,989 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 [2021-03-11 00:29:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:21,067 INFO L225 Difference]: With dead ends: 31417 [2021-03-11 00:29:21,067 INFO L226 Difference]: Without dead ends: 31417 [2021-03-11 00:29:21,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1390.2ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:29:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31417 states. [2021-03-11 00:29:21,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31417 to 22542. [2021-03-11 00:29:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 3.8634488265826716) internal successors, (87086), 22541 states have internal predecessors, (87086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 87086 transitions. [2021-03-11 00:29:21,677 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 87086 transitions. Word has length 28 [2021-03-11 00:29:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:21,677 INFO L480 AbstractCegarLoop]: Abstraction has 22542 states and 87086 transitions. [2021-03-11 00:29:21,677 INFO L481 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) [2021-03-11 00:29:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 87086 transitions. [2021-03-11 00:29:21,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:21,711 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:21,711 INFO L519 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] [2021-03-11 00:29:21,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-03-11 00:29:21,912 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:21,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:21,912 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 126 times [2021-03-11 00:29:21,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:21,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384519535] [2021-03-11 00:29:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:22,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384519535] [2021-03-11 00:29:22,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136427129] [2021-03-11 00:29:22,022 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 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 [2021-03-11 00:29:22,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:29:22,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:22,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:29:22,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:29:22,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:22,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-11 00:29:22,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159526503] [2021-03-11 00:29:22,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:22,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:22,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:22,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:22,250 INFO L87 Difference]: Start difference. First operand 22542 states and 87086 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) [2021-03-11 00:29:24,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:24,186 INFO L93 Difference]: Finished difference Result 29674 states and 110683 transitions. [2021-03-11 00:29:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:29:24,189 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 [2021-03-11 00:29:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:24,260 INFO L225 Difference]: With dead ends: 29674 [2021-03-11 00:29:24,260 INFO L226 Difference]: Without dead ends: 29662 [2021-03-11 00:29:24,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1146.4ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:29:24,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29662 states. [2021-03-11 00:29:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29662 to 22694. [2021-03-11 00:29:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22694 states, 22693 states have (on average 3.858017890979597) internal successors, (87550), 22693 states have internal predecessors, (87550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22694 states to 22694 states and 87550 transitions. [2021-03-11 00:29:24,768 INFO L78 Accepts]: Start accepts. Automaton has 22694 states and 87550 transitions. Word has length 28 [2021-03-11 00:29:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:24,768 INFO L480 AbstractCegarLoop]: Abstraction has 22694 states and 87550 transitions. [2021-03-11 00:29:24,768 INFO L481 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) [2021-03-11 00:29:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 22694 states and 87550 transitions. [2021-03-11 00:29:24,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:24,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:24,804 INFO L519 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] [2021-03-11 00:29:25,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-03-11 00:29:25,004 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:25,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 127 times [2021-03-11 00:29:25,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:25,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590527738] [2021-03-11 00:29:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:25,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590527738] [2021-03-11 00:29:25,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950188933] [2021-03-11 00:29:25,101 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 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 [2021-03-11 00:29:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:25,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:25,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:25,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:25,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:29:25,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524388710] [2021-03-11 00:29:25,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:29:25,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:25,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:29:25,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:29:25,368 INFO L87 Difference]: Start difference. First operand 22694 states and 87550 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) [2021-03-11 00:29:25,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:25,944 INFO L93 Difference]: Finished difference Result 25953 states and 98507 transitions. [2021-03-11 00:29:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:29:25,947 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 [2021-03-11 00:29:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:26,014 INFO L225 Difference]: With dead ends: 25953 [2021-03-11 00:29:26,015 INFO L226 Difference]: Without dead ends: 25953 [2021-03-11 00:29:26,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 339.6ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:29:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25953 states. [2021-03-11 00:29:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25953 to 23497. [2021-03-11 00:29:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23497 states, 23496 states have (on average 3.852953694245829) internal successors, (90529), 23496 states have internal predecessors, (90529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23497 states to 23497 states and 90529 transitions. [2021-03-11 00:29:26,615 INFO L78 Accepts]: Start accepts. Automaton has 23497 states and 90529 transitions. Word has length 28 [2021-03-11 00:29:26,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:26,615 INFO L480 AbstractCegarLoop]: Abstraction has 23497 states and 90529 transitions. [2021-03-11 00:29:26,615 INFO L481 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) [2021-03-11 00:29:26,615 INFO L276 IsEmpty]: Start isEmpty. Operand 23497 states and 90529 transitions. [2021-03-11 00:29:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:26,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:26,652 INFO L519 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] [2021-03-11 00:29:26,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-03-11 00:29:26,853 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 128 times [2021-03-11 00:29:26,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:26,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557941302] [2021-03-11 00:29:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:26,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557941302] [2021-03-11 00:29:26,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275571676] [2021-03-11 00:29:26,969 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 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 [2021-03-11 00:29:26,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:29:26,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:26,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:29:26,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:27,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:27,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-11 00:29:27,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951317611] [2021-03-11 00:29:27,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:27,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:27,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:27,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:27,292 INFO L87 Difference]: Start difference. First operand 23497 states and 90529 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) [2021-03-11 00:29:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:29,514 INFO L93 Difference]: Finished difference Result 31449 states and 116111 transitions. [2021-03-11 00:29:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:29:29,514 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 [2021-03-11 00:29:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:29,597 INFO L225 Difference]: With dead ends: 31449 [2021-03-11 00:29:29,597 INFO L226 Difference]: Without dead ends: 31449 [2021-03-11 00:29:29,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1378.4ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:29:29,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31449 states. [2021-03-11 00:29:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31449 to 24701. [2021-03-11 00:29:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24701 states, 24700 states have (on average 3.8202024291497976) internal successors, (94359), 24700 states have internal predecessors, (94359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24701 states to 24701 states and 94359 transitions. [2021-03-11 00:29:30,218 INFO L78 Accepts]: Start accepts. Automaton has 24701 states and 94359 transitions. Word has length 28 [2021-03-11 00:29:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:30,218 INFO L480 AbstractCegarLoop]: Abstraction has 24701 states and 94359 transitions. [2021-03-11 00:29:30,218 INFO L481 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) [2021-03-11 00:29:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 24701 states and 94359 transitions. [2021-03-11 00:29:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:30,262 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:30,262 INFO L519 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] [2021-03-11 00:29:30,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-03-11 00:29:30,463 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:30,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:30,463 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 129 times [2021-03-11 00:29:30,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:30,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923975659] [2021-03-11 00:29:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:30,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923975659] [2021-03-11 00:29:30,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179542514] [2021-03-11 00:29:30,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:29:30,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:29:30,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:30,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:29:30,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:30,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:30,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:29:30,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463013012] [2021-03-11 00:29:30,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:29:30,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:29:30,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:29:30,942 INFO L87 Difference]: Start difference. First operand 24701 states and 94359 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) [2021-03-11 00:29:32,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:32,795 INFO L93 Difference]: Finished difference Result 30571 states and 113768 transitions. [2021-03-11 00:29:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:29:32,798 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 [2021-03-11 00:29:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:32,876 INFO L225 Difference]: With dead ends: 30571 [2021-03-11 00:29:32,876 INFO L226 Difference]: Without dead ends: 30563 [2021-03-11 00:29:32,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1123.8ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:29:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30563 states. [2021-03-11 00:29:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30563 to 24523. [2021-03-11 00:29:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24523 states, 24522 states have (on average 3.826278443846342) internal successors, (93828), 24522 states have internal predecessors, (93828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24523 states to 24523 states and 93828 transitions. [2021-03-11 00:29:33,515 INFO L78 Accepts]: Start accepts. Automaton has 24523 states and 93828 transitions. Word has length 28 [2021-03-11 00:29:33,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:33,515 INFO L480 AbstractCegarLoop]: Abstraction has 24523 states and 93828 transitions. [2021-03-11 00:29:33,515 INFO L481 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) [2021-03-11 00:29:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 24523 states and 93828 transitions. [2021-03-11 00:29:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:33,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:33,551 INFO L519 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] [2021-03-11 00:29:33,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:33,752 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:33,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:33,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 130 times [2021-03-11 00:29:33,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:33,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553072280] [2021-03-11 00:29:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:33,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553072280] [2021-03-11 00:29:33,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125619568] [2021-03-11 00:29:33,854 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 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 [2021-03-11 00:29:33,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:33,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:33,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:29:33,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:34,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:34,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:29:34,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596534930] [2021-03-11 00:29:34,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:29:34,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:34,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:29:34,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:29:34,113 INFO L87 Difference]: Start difference. First operand 24523 states and 93828 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) [2021-03-11 00:29:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:36,216 INFO L93 Difference]: Finished difference Result 32405 states and 119336 transitions. [2021-03-11 00:29:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:29:36,216 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 [2021-03-11 00:29:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:36,309 INFO L225 Difference]: With dead ends: 32405 [2021-03-11 00:29:36,309 INFO L226 Difference]: Without dead ends: 32405 [2021-03-11 00:29:36,310 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1299.6ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:29:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32405 states. [2021-03-11 00:29:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32405 to 25505. [2021-03-11 00:29:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25505 states, 25504 states have (on average 3.802423149309912) internal successors, (96977), 25504 states have internal predecessors, (96977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25505 states to 25505 states and 96977 transitions. [2021-03-11 00:29:36,911 INFO L78 Accepts]: Start accepts. Automaton has 25505 states and 96977 transitions. Word has length 28 [2021-03-11 00:29:36,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:36,911 INFO L480 AbstractCegarLoop]: Abstraction has 25505 states and 96977 transitions. [2021-03-11 00:29:36,911 INFO L481 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) [2021-03-11 00:29:36,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25505 states and 96977 transitions. [2021-03-11 00:29:36,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:36,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:36,950 INFO L519 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] [2021-03-11 00:29:37,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-03-11 00:29:37,155 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:37,155 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 131 times [2021-03-11 00:29:37,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:37,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838114823] [2021-03-11 00:29:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:37,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838114823] [2021-03-11 00:29:37,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668370802] [2021-03-11 00:29:37,265 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 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 [2021-03-11 00:29:37,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:29:37,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:37,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:29:37,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:37,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:37,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-03-11 00:29:37,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505970633] [2021-03-11 00:29:37,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:29:37,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:37,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:29:37,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:29:37,552 INFO L87 Difference]: Start difference. First operand 25505 states and 96977 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) [2021-03-11 00:29:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:38,710 INFO L93 Difference]: Finished difference Result 31168 states and 117592 transitions. [2021-03-11 00:29:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:29:38,713 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 [2021-03-11 00:29:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:38,792 INFO L225 Difference]: With dead ends: 31168 [2021-03-11 00:29:38,793 INFO L226 Difference]: Without dead ends: 31155 [2021-03-11 00:29:38,793 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 467.2ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:29:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31155 states. [2021-03-11 00:29:39,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31155 to 29628. [2021-03-11 00:29:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29628 states, 29627 states have (on average 3.819927768589462) internal successors, (113173), 29627 states have internal predecessors, (113173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29628 states to 29628 states and 113173 transitions. [2021-03-11 00:29:39,523 INFO L78 Accepts]: Start accepts. Automaton has 29628 states and 113173 transitions. Word has length 28 [2021-03-11 00:29:39,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:39,524 INFO L480 AbstractCegarLoop]: Abstraction has 29628 states and 113173 transitions. [2021-03-11 00:29:39,524 INFO L481 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) [2021-03-11 00:29:39,524 INFO L276 IsEmpty]: Start isEmpty. Operand 29628 states and 113173 transitions. [2021-03-11 00:29:39,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:39,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:39,581 INFO L519 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] [2021-03-11 00:29:39,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:39,782 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:39,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:39,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 132 times [2021-03-11 00:29:39,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:39,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523746882] [2021-03-11 00:29:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:39,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523746882] [2021-03-11 00:29:39,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495629287] [2021-03-11 00:29:39,895 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 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 [2021-03-11 00:29:39,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:29:39,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:39,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:29:39,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:40,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:40,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-03-11 00:29:40,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207918133] [2021-03-11 00:29:40,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:29:40,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:40,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:29:40,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:29:40,181 INFO L87 Difference]: Start difference. First operand 29628 states and 113173 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) [2021-03-11 00:29:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:41,230 INFO L93 Difference]: Finished difference Result 32631 states and 122504 transitions. [2021-03-11 00:29:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:29:41,233 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 [2021-03-11 00:29:41,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:41,312 INFO L225 Difference]: With dead ends: 32631 [2021-03-11 00:29:41,312 INFO L226 Difference]: Without dead ends: 32631 [2021-03-11 00:29:41,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 491.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:29:41,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32631 states. [2021-03-11 00:29:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32631 to 29373. [2021-03-11 00:29:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29373 states, 29372 states have (on average 3.816355712923873) internal successors, (112094), 29372 states have internal predecessors, (112094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29373 states to 29373 states and 112094 transitions. [2021-03-11 00:29:41,983 INFO L78 Accepts]: Start accepts. Automaton has 29373 states and 112094 transitions. Word has length 28 [2021-03-11 00:29:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:41,983 INFO L480 AbstractCegarLoop]: Abstraction has 29373 states and 112094 transitions. [2021-03-11 00:29:41,983 INFO L481 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) [2021-03-11 00:29:41,983 INFO L276 IsEmpty]: Start isEmpty. Operand 29373 states and 112094 transitions. [2021-03-11 00:29:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:42,037 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:42,037 INFO L519 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] [2021-03-11 00:29:42,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:42,237 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:42,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 133 times [2021-03-11 00:29:42,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:42,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282019472] [2021-03-11 00:29:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:42,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282019472] [2021-03-11 00:29:42,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896761631] [2021-03-11 00:29:42,348 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 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 [2021-03-11 00:29:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:29:42,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:42,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:42,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:29:42,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5424852] [2021-03-11 00:29:42,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:29:42,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:42,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:29:42,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:29:42,659 INFO L87 Difference]: Start difference. First operand 29373 states and 112094 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) [2021-03-11 00:29:44,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:44,565 INFO L93 Difference]: Finished difference Result 35986 states and 133856 transitions. [2021-03-11 00:29:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:29:44,568 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 [2021-03-11 00:29:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:44,662 INFO L225 Difference]: With dead ends: 35986 [2021-03-11 00:29:44,662 INFO L226 Difference]: Without dead ends: 35978 [2021-03-11 00:29:44,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 998.1ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:29:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35978 states. [2021-03-11 00:29:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35978 to 29339. [2021-03-11 00:29:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29339 states, 29338 states have (on average 3.8167905106005864) internal successors, (111977), 29338 states have internal predecessors, (111977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29339 states to 29339 states and 111977 transitions. [2021-03-11 00:29:45,447 INFO L78 Accepts]: Start accepts. Automaton has 29339 states and 111977 transitions. Word has length 28 [2021-03-11 00:29:45,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:45,447 INFO L480 AbstractCegarLoop]: Abstraction has 29339 states and 111977 transitions. [2021-03-11 00:29:45,447 INFO L481 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) [2021-03-11 00:29:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 29339 states and 111977 transitions. [2021-03-11 00:29:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:45,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:45,495 INFO L519 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] [2021-03-11 00:29:45,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:45,695 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:45,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:45,696 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 134 times [2021-03-11 00:29:45,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:45,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015105591] [2021-03-11 00:29:45,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:45,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015105591] [2021-03-11 00:29:45,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756697187] [2021-03-11 00:29:45,814 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 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 [2021-03-11 00:29:45,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:29:45,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:45,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:29:45,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:46,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:46,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-03-11 00:29:46,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590895198] [2021-03-11 00:29:46,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:29:46,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:46,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:29:46,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:29:46,104 INFO L87 Difference]: Start difference. First operand 29339 states and 111977 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) [2021-03-11 00:29:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:47,249 INFO L93 Difference]: Finished difference Result 32185 states and 121439 transitions. [2021-03-11 00:29:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:29:47,252 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 [2021-03-11 00:29:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:47,340 INFO L225 Difference]: With dead ends: 32185 [2021-03-11 00:29:47,340 INFO L226 Difference]: Without dead ends: 32185 [2021-03-11 00:29:47,341 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 698.2ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:29:47,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32185 states. [2021-03-11 00:29:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32185 to 29871. [2021-03-11 00:29:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29871 states, 29870 states have (on average 3.8152326749246734) internal successors, (113961), 29870 states have internal predecessors, (113961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29871 states to 29871 states and 113961 transitions. [2021-03-11 00:29:48,018 INFO L78 Accepts]: Start accepts. Automaton has 29871 states and 113961 transitions. Word has length 28 [2021-03-11 00:29:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:48,018 INFO L480 AbstractCegarLoop]: Abstraction has 29871 states and 113961 transitions. [2021-03-11 00:29:48,018 INFO L481 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) [2021-03-11 00:29:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 29871 states and 113961 transitions. [2021-03-11 00:29:48,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:48,071 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:48,071 INFO L519 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] [2021-03-11 00:29:48,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:48,272 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:48,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:48,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 135 times [2021-03-11 00:29:48,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:48,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334343609] [2021-03-11 00:29:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:48,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334343609] [2021-03-11 00:29:48,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732928464] [2021-03-11 00:29:48,384 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 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 [2021-03-11 00:29:48,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:29:48,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:48,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:29:48,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:48,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:48,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:29:48,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475260933] [2021-03-11 00:29:48,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:29:48,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:48,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:29:48,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:29:48,693 INFO L87 Difference]: Start difference. First operand 29871 states and 113961 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) [2021-03-11 00:29:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:50,514 INFO L93 Difference]: Finished difference Result 36821 states and 137037 transitions. [2021-03-11 00:29:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:29:50,516 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 [2021-03-11 00:29:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:50,598 INFO L225 Difference]: With dead ends: 36821 [2021-03-11 00:29:50,598 INFO L226 Difference]: Without dead ends: 36797 [2021-03-11 00:29:50,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1029.9ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:29:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36797 states. [2021-03-11 00:29:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36797 to 30043. [2021-03-11 00:29:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30043 states, 30042 states have (on average 3.811164369882165) internal successors, (114495), 30042 states have internal predecessors, (114495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30043 states to 30043 states and 114495 transitions. [2021-03-11 00:29:51,431 INFO L78 Accepts]: Start accepts. Automaton has 30043 states and 114495 transitions. Word has length 28 [2021-03-11 00:29:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:51,431 INFO L480 AbstractCegarLoop]: Abstraction has 30043 states and 114495 transitions. [2021-03-11 00:29:51,431 INFO L481 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) [2021-03-11 00:29:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 30043 states and 114495 transitions. [2021-03-11 00:29:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:51,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:51,485 INFO L519 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] [2021-03-11 00:29:51,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-03-11 00:29:51,685 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:51,685 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 136 times [2021-03-11 00:29:51,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:51,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139406013] [2021-03-11 00:29:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:51,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139406013] [2021-03-11 00:29:51,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943160727] [2021-03-11 00:29:51,825 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 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 [2021-03-11 00:29:51,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:51,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:51,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:29:51,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:52,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:52,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-03-11 00:29:52,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924061781] [2021-03-11 00:29:52,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:29:52,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:52,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:29:52,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:29:52,120 INFO L87 Difference]: Start difference. First operand 30043 states and 114495 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) [2021-03-11 00:29:53,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:53,673 INFO L93 Difference]: Finished difference Result 32599 states and 122907 transitions. [2021-03-11 00:29:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:29:53,676 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 [2021-03-11 00:29:53,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:53,766 INFO L225 Difference]: With dead ends: 32599 [2021-03-11 00:29:53,767 INFO L226 Difference]: Without dead ends: 32599 [2021-03-11 00:29:53,767 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 836.7ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:29:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32599 states. [2021-03-11 00:29:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32599 to 29969. [2021-03-11 00:29:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29969 states, 29968 states have (on average 3.812032835024026) internal successors, (114239), 29968 states have internal predecessors, (114239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29969 states to 29969 states and 114239 transitions. [2021-03-11 00:29:54,652 INFO L78 Accepts]: Start accepts. Automaton has 29969 states and 114239 transitions. Word has length 28 [2021-03-11 00:29:54,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:54,653 INFO L480 AbstractCegarLoop]: Abstraction has 29969 states and 114239 transitions. [2021-03-11 00:29:54,653 INFO L481 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) [2021-03-11 00:29:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 29969 states and 114239 transitions. [2021-03-11 00:29:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:54,706 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:54,706 INFO L519 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] [2021-03-11 00:29:54,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-03-11 00:29:54,906 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:54,907 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 137 times [2021-03-11 00:29:54,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:54,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482487977] [2021-03-11 00:29:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:55,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482487977] [2021-03-11 00:29:55,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151644156] [2021-03-11 00:29:55,044 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 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 [2021-03-11 00:29:55,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:29:55,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:55,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:29:55,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:55,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:55,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-11 00:29:55,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098482011] [2021-03-11 00:29:55,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:55,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:55,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:55,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:55,362 INFO L87 Difference]: Start difference. First operand 29969 states and 114239 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) [2021-03-11 00:29:56,574 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-03-11 00:29:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:57,631 INFO L93 Difference]: Finished difference Result 36744 states and 136778 transitions. [2021-03-11 00:29:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:29:57,633 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 [2021-03-11 00:29:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:57,720 INFO L225 Difference]: With dead ends: 36744 [2021-03-11 00:29:57,720 INFO L226 Difference]: Without dead ends: 36704 [2021-03-11 00:29:57,720 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1347.9ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:29:57,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36704 states. [2021-03-11 00:29:58,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36704 to 30125. [2021-03-11 00:29:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30125 states, 30124 states have (on average 3.8080932147125215) internal successors, (114715), 30124 states have internal predecessors, (114715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30125 states to 30125 states and 114715 transitions. [2021-03-11 00:29:58,598 INFO L78 Accepts]: Start accepts. Automaton has 30125 states and 114715 transitions. Word has length 28 [2021-03-11 00:29:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:58,599 INFO L480 AbstractCegarLoop]: Abstraction has 30125 states and 114715 transitions. [2021-03-11 00:29:58,599 INFO L481 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) [2021-03-11 00:29:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 30125 states and 114715 transitions. [2021-03-11 00:29:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:29:58,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:58,652 INFO L519 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] [2021-03-11 00:29:58,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-03-11 00:29:58,853 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 138 times [2021-03-11 00:29:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:58,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995541303] [2021-03-11 00:29:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:58,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995541303] [2021-03-11 00:29:58,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048281806] [2021-03-11 00:29:58,969 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 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 [2021-03-11 00:29:58,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:29:58,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:58,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:29:58,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:59,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:59,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:29:59,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075162465] [2021-03-11 00:29:59,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:29:59,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:59,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:29:59,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:29:59,473 INFO L87 Difference]: Start difference. First operand 30125 states and 114715 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) [2021-03-11 00:29:59,987 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2021-03-11 00:30:04,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:04,111 INFO L93 Difference]: Finished difference Result 68801 states and 253165 transitions. [2021-03-11 00:30:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:30:04,117 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 [2021-03-11 00:30:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:04,358 INFO L225 Difference]: With dead ends: 68801 [2021-03-11 00:30:04,358 INFO L226 Difference]: Without dead ends: 68801 [2021-03-11 00:30:04,358 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 2764.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-03-11 00:30:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68801 states. [2021-03-11 00:30:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68801 to 37809. [2021-03-11 00:30:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37809 states, 37808 states have (on average 3.8872460854845534) internal successors, (146969), 37808 states have internal predecessors, (146969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:05,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37809 states to 37809 states and 146969 transitions. [2021-03-11 00:30:05,828 INFO L78 Accepts]: Start accepts. Automaton has 37809 states and 146969 transitions. Word has length 28 [2021-03-11 00:30:05,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:05,829 INFO L480 AbstractCegarLoop]: Abstraction has 37809 states and 146969 transitions. [2021-03-11 00:30:05,829 INFO L481 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) [2021-03-11 00:30:05,829 INFO L276 IsEmpty]: Start isEmpty. Operand 37809 states and 146969 transitions. [2021-03-11 00:30:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:30:05,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:05,895 INFO L519 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] [2021-03-11 00:30:06,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-03-11 00:30:06,096 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:06,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 139 times [2021-03-11 00:30:06,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:06,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084196488] [2021-03-11 00:30:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:06,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084196488] [2021-03-11 00:30:06,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855109017] [2021-03-11 00:30:06,342 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 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 [2021-03-11 00:30:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:06,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:30:06,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:06,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:06,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:30:06,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905495707] [2021-03-11 00:30:06,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:30:06,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:06,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:30:06,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:30:06,864 INFO L87 Difference]: Start difference. First operand 37809 states and 146969 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) [2021-03-11 00:30:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:10,722 INFO L93 Difference]: Finished difference Result 68217 states and 251622 transitions. [2021-03-11 00:30:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:30:10,725 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 [2021-03-11 00:30:10,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:10,944 INFO L225 Difference]: With dead ends: 68217 [2021-03-11 00:30:10,944 INFO L226 Difference]: Without dead ends: 68217 [2021-03-11 00:30:10,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 2476.9ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-03-11 00:30:11,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68217 states. [2021-03-11 00:30:12,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68217 to 37806. [2021-03-11 00:30:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37806 states, 37805 states have (on average 3.8871842348895647) internal successors, (146955), 37805 states have internal predecessors, (146955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37806 states to 37806 states and 146955 transitions. [2021-03-11 00:30:12,381 INFO L78 Accepts]: Start accepts. Automaton has 37806 states and 146955 transitions. Word has length 28 [2021-03-11 00:30:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:12,382 INFO L480 AbstractCegarLoop]: Abstraction has 37806 states and 146955 transitions. [2021-03-11 00:30:12,382 INFO L481 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) [2021-03-11 00:30:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 37806 states and 146955 transitions. [2021-03-11 00:30:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:30:12,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:12,455 INFO L519 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] [2021-03-11 00:30:12,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:12,659 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:12,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 140 times [2021-03-11 00:30:12,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:12,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845251480] [2021-03-11 00:30:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:12,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845251480] [2021-03-11 00:30:12,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162008081] [2021-03-11 00:30:12,792 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 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 [2021-03-11 00:30:12,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:30:12,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:12,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:30:12,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:13,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:13,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:30:13,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705668814] [2021-03-11 00:30:13,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:30:13,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:13,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:30:13,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:30:13,265 INFO L87 Difference]: Start difference. First operand 37806 states and 146955 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) [2021-03-11 00:30:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:17,174 INFO L93 Difference]: Finished difference Result 63636 states and 236045 transitions. [2021-03-11 00:30:17,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-11 00:30:17,177 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 [2021-03-11 00:30:17,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:17,376 INFO L225 Difference]: With dead ends: 63636 [2021-03-11 00:30:17,376 INFO L226 Difference]: Without dead ends: 63636 [2021-03-11 00:30:17,376 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 2455.1ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:30:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63636 states. [2021-03-11 00:30:18,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63636 to 37828. [2021-03-11 00:30:18,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37828 states, 37827 states have (on average 3.8874349009966425) internal successors, (147050), 37827 states have internal predecessors, (147050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37828 states to 37828 states and 147050 transitions. [2021-03-11 00:30:18,932 INFO L78 Accepts]: Start accepts. Automaton has 37828 states and 147050 transitions. Word has length 28 [2021-03-11 00:30:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:18,932 INFO L480 AbstractCegarLoop]: Abstraction has 37828 states and 147050 transitions. [2021-03-11 00:30:18,932 INFO L481 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) [2021-03-11 00:30:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 37828 states and 147050 transitions. [2021-03-11 00:30:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:30:18,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:18,999 INFO L519 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] [2021-03-11 00:30:19,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-03-11 00:30:19,199 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:19,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 141 times [2021-03-11 00:30:19,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:19,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350566750] [2021-03-11 00:30:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:19,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350566750] [2021-03-11 00:30:19,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848855042] [2021-03-11 00:30:19,337 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 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 [2021-03-11 00:30:19,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:30:19,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:19,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:30:19,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:19,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:19,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:30:19,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857733799] [2021-03-11 00:30:19,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:30:19,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:19,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:30:19,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:30:19,715 INFO L87 Difference]: Start difference. First operand 37828 states and 147050 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) [2021-03-11 00:30:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:23,114 INFO L93 Difference]: Finished difference Result 62782 states and 233841 transitions. [2021-03-11 00:30:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:30:23,118 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 [2021-03-11 00:30:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:23,300 INFO L225 Difference]: With dead ends: 62782 [2021-03-11 00:30:23,300 INFO L226 Difference]: Without dead ends: 62774 [2021-03-11 00:30:23,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1936.3ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-03-11 00:30:23,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62774 states. [2021-03-11 00:30:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62774 to 37828. [2021-03-11 00:30:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37828 states, 37827 states have (on average 3.8872762841356705) internal successors, (147044), 37827 states have internal predecessors, (147044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37828 states to 37828 states and 147044 transitions. [2021-03-11 00:30:24,799 INFO L78 Accepts]: Start accepts. Automaton has 37828 states and 147044 transitions. Word has length 28 [2021-03-11 00:30:24,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:24,799 INFO L480 AbstractCegarLoop]: Abstraction has 37828 states and 147044 transitions. [2021-03-11 00:30:24,799 INFO L481 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) [2021-03-11 00:30:24,800 INFO L276 IsEmpty]: Start isEmpty. Operand 37828 states and 147044 transitions. [2021-03-11 00:30:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:30:24,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:24,865 INFO L519 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] [2021-03-11 00:30:25,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:25,066 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:25,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:25,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 142 times [2021-03-11 00:30:25,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:25,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806149706] [2021-03-11 00:30:25,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:25,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806149706] [2021-03-11 00:30:25,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032491915] [2021-03-11 00:30:25,196 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 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 [2021-03-11 00:30:25,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:30:25,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:25,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:30:25,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:25,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:25,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:30:25,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878948762] [2021-03-11 00:30:25,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:30:25,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:25,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:30:25,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:30:25,721 INFO L87 Difference]: Start difference. First operand 37828 states and 147044 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) [2021-03-11 00:30:27,463 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-03-11 00:30:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:29,802 INFO L93 Difference]: Finished difference Result 62315 states and 232613 transitions. [2021-03-11 00:30:29,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:30:29,821 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 [2021-03-11 00:30:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:30,021 INFO L225 Difference]: With dead ends: 62315 [2021-03-11 00:30:30,022 INFO L226 Difference]: Without dead ends: 62315 [2021-03-11 00:30:30,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 2507.3ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:30:30,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62315 states. [2021-03-11 00:30:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62315 to 37836. [2021-03-11 00:30:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37836 states, 37835 states have (on average 3.887352980044932) internal successors, (147078), 37835 states have internal predecessors, (147078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37836 states to 37836 states and 147078 transitions. [2021-03-11 00:30:31,362 INFO L78 Accepts]: Start accepts. Automaton has 37836 states and 147078 transitions. Word has length 28 [2021-03-11 00:30:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:31,362 INFO L480 AbstractCegarLoop]: Abstraction has 37836 states and 147078 transitions. [2021-03-11 00:30:31,362 INFO L481 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) [2021-03-11 00:30:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 37836 states and 147078 transitions. [2021-03-11 00:30:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:30:31,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:31,439 INFO L519 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] [2021-03-11 00:30:31,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-03-11 00:30:31,655 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:31,655 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 143 times [2021-03-11 00:30:31,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:31,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111443797] [2021-03-11 00:30:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:31,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111443797] [2021-03-11 00:30:31,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393842744] [2021-03-11 00:30:31,798 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 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 [2021-03-11 00:30:31,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:30:31,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:31,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:30:31,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:32,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:32,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:30:32,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322675333] [2021-03-11 00:30:32,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:30:32,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:32,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:30:32,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:30:32,382 INFO L87 Difference]: Start difference. First operand 37836 states and 147078 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) [2021-03-11 00:30:36,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:36,196 INFO L93 Difference]: Finished difference Result 62082 states and 232029 transitions. [2021-03-11 00:30:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-11 00:30:36,200 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 [2021-03-11 00:30:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:36,594 INFO L225 Difference]: With dead ends: 62082 [2021-03-11 00:30:36,594 INFO L226 Difference]: Without dead ends: 62074 [2021-03-11 00:30:36,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 2310.6ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:30:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62074 states. [2021-03-11 00:30:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62074 to 37836. [2021-03-11 00:30:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37836 states, 37835 states have (on average 3.8873001189374916) internal successors, (147076), 37835 states have internal predecessors, (147076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37836 states to 37836 states and 147076 transitions. [2021-03-11 00:30:37,914 INFO L78 Accepts]: Start accepts. Automaton has 37836 states and 147076 transitions. Word has length 28 [2021-03-11 00:30:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:37,914 INFO L480 AbstractCegarLoop]: Abstraction has 37836 states and 147076 transitions. [2021-03-11 00:30:37,914 INFO L481 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) [2021-03-11 00:30:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 37836 states and 147076 transitions. [2021-03-11 00:30:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:30:37,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:37,982 INFO L519 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] [2021-03-11 00:30:38,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:38,183 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:38,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:38,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 144 times [2021-03-11 00:30:38,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:38,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882615744] [2021-03-11 00:30:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:38,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882615744] [2021-03-11 00:30:38,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381706566] [2021-03-11 00:30:38,275 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 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 [2021-03-11 00:30:38,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:30:38,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:38,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:30:38,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:38,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:38,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-11 00:30:38,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820509042] [2021-03-11 00:30:38,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:30:38,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:38,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:30:38,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:30:38,698 INFO L87 Difference]: Start difference. First operand 37836 states and 147076 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) [2021-03-11 00:30:40,588 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-03-11 00:30:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:42,799 INFO L93 Difference]: Finished difference Result 61556 states and 228528 transitions. [2021-03-11 00:30:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:30:42,802 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 [2021-03-11 00:30:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:42,994 INFO L225 Difference]: With dead ends: 61556 [2021-03-11 00:30:42,994 INFO L226 Difference]: Without dead ends: 61556 [2021-03-11 00:30:42,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 2641.7ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-03-11 00:30:43,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61556 states. [2021-03-11 00:30:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61556 to 40635. [2021-03-11 00:30:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40635 states, 40634 states have (on average 3.8911748781808337) internal successors, (158114), 40634 states have internal predecessors, (158114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:44,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40635 states to 40635 states and 158114 transitions. [2021-03-11 00:30:44,623 INFO L78 Accepts]: Start accepts. Automaton has 40635 states and 158114 transitions. Word has length 28 [2021-03-11 00:30:44,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:44,623 INFO L480 AbstractCegarLoop]: Abstraction has 40635 states and 158114 transitions. [2021-03-11 00:30:44,623 INFO L481 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) [2021-03-11 00:30:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 40635 states and 158114 transitions. [2021-03-11 00:30:44,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:30:44,697 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:44,697 INFO L519 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] [2021-03-11 00:30:44,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:44,897 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:44,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:44,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 145 times [2021-03-11 00:30:44,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:44,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257989771] [2021-03-11 00:30:44,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:45,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257989771] [2021-03-11 00:30:45,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746696439] [2021-03-11 00:30:45,028 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 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 [2021-03-11 00:30:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:45,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:30:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:45,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:45,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-11 00:30:45,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782711865] [2021-03-11 00:30:45,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:30:45,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:45,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:30:45,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:30:45,382 INFO L87 Difference]: Start difference. First operand 40635 states and 158114 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) [2021-03-11 00:30:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:49,063 INFO L93 Difference]: Finished difference Result 61051 states and 227204 transitions. [2021-03-11 00:30:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:30:49,067 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 [2021-03-11 00:30:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:49,279 INFO L225 Difference]: With dead ends: 61051 [2021-03-11 00:30:49,279 INFO L226 Difference]: Without dead ends: 61043 [2021-03-11 00:30:49,279 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 2071.5ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:30:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61043 states. [2021-03-11 00:30:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61043 to 40349. [2021-03-11 00:30:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40349 states, 40348 states have (on average 3.8968226430058492) internal successors, (157229), 40348 states have internal predecessors, (157229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40349 states to 40349 states and 157229 transitions. [2021-03-11 00:30:50,815 INFO L78 Accepts]: Start accepts. Automaton has 40349 states and 157229 transitions. Word has length 28 [2021-03-11 00:30:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:50,816 INFO L480 AbstractCegarLoop]: Abstraction has 40349 states and 157229 transitions. [2021-03-11 00:30:50,816 INFO L481 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) [2021-03-11 00:30:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 40349 states and 157229 transitions. [2021-03-11 00:30:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:30:50,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:50,890 INFO L519 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] [2021-03-11 00:30:51,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:51,091 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 146 times [2021-03-11 00:30:51,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:51,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101653000] [2021-03-11 00:30:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:51,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101653000] [2021-03-11 00:30:51,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446257494] [2021-03-11 00:30:51,237 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 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 [2021-03-11 00:30:51,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:30:51,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:30:51,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:51,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:51,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-11 00:30:51,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346303562] [2021-03-11 00:30:51,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:30:51,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:51,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:30:51,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:30:51,732 INFO L87 Difference]: Start difference. First operand 40349 states and 157229 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) [2021-03-11 00:30:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:54,805 INFO L93 Difference]: Finished difference Result 59500 states and 222919 transitions. [2021-03-11 00:30:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:30:54,808 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 [2021-03-11 00:30:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:54,995 INFO L225 Difference]: With dead ends: 59500 [2021-03-11 00:30:54,995 INFO L226 Difference]: Without dead ends: 59476 [2021-03-11 00:30:54,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1835.1ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:30:55,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59476 states. [2021-03-11 00:30:56,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59476 to 40255. [2021-03-11 00:30:56,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40255 states, 40254 states have (on average 3.896805286431162) internal successors, (156862), 40254 states have internal predecessors, (156862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40255 states to 40255 states and 156862 transitions. [2021-03-11 00:30:56,713 INFO L78 Accepts]: Start accepts. Automaton has 40255 states and 156862 transitions. Word has length 28 [2021-03-11 00:30:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:56,713 INFO L480 AbstractCegarLoop]: Abstraction has 40255 states and 156862 transitions. [2021-03-11 00:30:56,713 INFO L481 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) [2021-03-11 00:30:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 40255 states and 156862 transitions. [2021-03-11 00:30:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:30:56,791 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:56,792 INFO L519 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] [2021-03-11 00:30:56,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:56,992 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:56,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 147 times [2021-03-11 00:30:56,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:56,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000964032] [2021-03-11 00:30:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:30:57,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000964032] [2021-03-11 00:30:57,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530837414] [2021-03-11 00:30:57,138 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 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 [2021-03-11 00:30:57,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:30:57,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:30:57,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:57,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:57,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:30:57,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390907365] [2021-03-11 00:30:57,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:30:57,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:57,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:30:57,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:30:57,718 INFO L87 Difference]: Start difference. First operand 40255 states and 156862 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) [2021-03-11 00:31:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:02,199 INFO L93 Difference]: Finished difference Result 60726 states and 226343 transitions. [2021-03-11 00:31:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-11 00:31:02,203 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 [2021-03-11 00:31:02,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:02,418 INFO L225 Difference]: With dead ends: 60726 [2021-03-11 00:31:02,419 INFO L226 Difference]: Without dead ends: 60726 [2021-03-11 00:31:02,419 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2901.4ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-03-11 00:31:02,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60726 states. [2021-03-11 00:31:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60726 to 40351. [2021-03-11 00:31:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40351 states, 40350 states have (on average 3.8953159851301113) internal successors, (157176), 40350 states have internal predecessors, (157176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40351 states to 40351 states and 157176 transitions. [2021-03-11 00:31:03,913 INFO L78 Accepts]: Start accepts. Automaton has 40351 states and 157176 transitions. Word has length 28 [2021-03-11 00:31:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:03,913 INFO L480 AbstractCegarLoop]: Abstraction has 40351 states and 157176 transitions. [2021-03-11 00:31:03,913 INFO L481 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) [2021-03-11 00:31:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 40351 states and 157176 transitions. [2021-03-11 00:31:03,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:31:03,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:03,989 INFO L519 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] [2021-03-11 00:31:04,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-03-11 00:31:04,190 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:04,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 148 times [2021-03-11 00:31:04,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:04,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778098130] [2021-03-11 00:31:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:31:04,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778098130] [2021-03-11 00:31:04,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310126930] [2021-03-11 00:31:04,339 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 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 [2021-03-11 00:31:04,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:31:04,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:04,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:31:04,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:04,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:04,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:31:04,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640382129] [2021-03-11 00:31:04,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:31:04,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:04,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:31:04,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:31:04,910 INFO L87 Difference]: Start difference. First operand 40351 states and 157176 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) [2021-03-11 00:31:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:08,957 INFO L93 Difference]: Finished difference Result 60292 states and 225103 transitions. [2021-03-11 00:31:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:31:08,960 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 [2021-03-11 00:31:08,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:09,124 INFO L225 Difference]: With dead ends: 60292 [2021-03-11 00:31:09,125 INFO L226 Difference]: Without dead ends: 60284 [2021-03-11 00:31:09,125 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 2494.9ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:31:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60284 states. [2021-03-11 00:31:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60284 to 40283. [2021-03-11 00:31:10,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40283 states, 40282 states have (on average 3.8966287671913014) internal successors, (156964), 40282 states have internal predecessors, (156964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40283 states to 40283 states and 156964 transitions. [2021-03-11 00:31:10,696 INFO L78 Accepts]: Start accepts. Automaton has 40283 states and 156964 transitions. Word has length 28 [2021-03-11 00:31:10,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:10,696 INFO L480 AbstractCegarLoop]: Abstraction has 40283 states and 156964 transitions. [2021-03-11 00:31:10,696 INFO L481 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) [2021-03-11 00:31:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 40283 states and 156964 transitions. [2021-03-11 00:31:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:31:10,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:10,968 INFO L519 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] [2021-03-11 00:31:11,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-03-11 00:31:11,169 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:11,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 149 times [2021-03-11 00:31:11,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:11,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824347931] [2021-03-11 00:31:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:31:11,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824347931] [2021-03-11 00:31:11,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764656600] [2021-03-11 00:31:11,325 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 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 [2021-03-11 00:31:11,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:31:11,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:11,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:31:11,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:11,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:11,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:31:11,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046799103] [2021-03-11 00:31:11,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:31:11,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:11,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:31:11,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:31:11,761 INFO L87 Difference]: Start difference. First operand 40283 states and 156964 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) [2021-03-11 00:31:14,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:14,807 INFO L93 Difference]: Finished difference Result 59023 states and 221592 transitions. [2021-03-11 00:31:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:31:14,811 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 [2021-03-11 00:31:14,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:15,234 INFO L225 Difference]: With dead ends: 59023 [2021-03-11 00:31:15,234 INFO L226 Difference]: Without dead ends: 58999 [2021-03-11 00:31:15,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1637.0ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:31:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58999 states. [2021-03-11 00:31:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58999 to 40259. [2021-03-11 00:31:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40259 states, 40258 states have (on average 3.896765860201699) internal successors, (156876), 40258 states have internal predecessors, (156876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40259 states to 40259 states and 156876 transitions. [2021-03-11 00:31:16,695 INFO L78 Accepts]: Start accepts. Automaton has 40259 states and 156876 transitions. Word has length 28 [2021-03-11 00:31:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:16,695 INFO L480 AbstractCegarLoop]: Abstraction has 40259 states and 156876 transitions. [2021-03-11 00:31:16,696 INFO L481 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) [2021-03-11 00:31:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 40259 states and 156876 transitions. [2021-03-11 00:31:16,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:31:16,780 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:16,780 INFO L519 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] [2021-03-11 00:31:16,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-03-11 00:31:16,987 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:16,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:16,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 150 times [2021-03-11 00:31:16,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:16,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43767801] [2021-03-11 00:31:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:17,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43767801] [2021-03-11 00:31:17,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390691878] [2021-03-11 00:31:17,170 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 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 [2021-03-11 00:31:17,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:31:17,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:17,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:31:17,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:17,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:17,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:31:17,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082063364] [2021-03-11 00:31:17,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:31:17,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:17,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:31:17,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:31:17,680 INFO L87 Difference]: Start difference. First operand 40259 states and 156876 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) [2021-03-11 00:31:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:23,821 INFO L93 Difference]: Finished difference Result 62461 states and 231344 transitions. [2021-03-11 00:31:23,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-03-11 00:31:23,825 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 [2021-03-11 00:31:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:24,040 INFO L225 Difference]: With dead ends: 62461 [2021-03-11 00:31:24,040 INFO L226 Difference]: Without dead ends: 62461 [2021-03-11 00:31:24,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 4041.0ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-03-11 00:31:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62461 states. [2021-03-11 00:31:25,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62461 to 44583. [2021-03-11 00:31:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44583 states, 44582 states have (on average 3.8468888789197435) internal successors, (171502), 44582 states have internal predecessors, (171502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44583 states to 44583 states and 171502 transitions. [2021-03-11 00:31:25,604 INFO L78 Accepts]: Start accepts. Automaton has 44583 states and 171502 transitions. Word has length 28 [2021-03-11 00:31:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:25,604 INFO L480 AbstractCegarLoop]: Abstraction has 44583 states and 171502 transitions. [2021-03-11 00:31:25,604 INFO L481 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) [2021-03-11 00:31:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 44583 states and 171502 transitions. [2021-03-11 00:31:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:31:25,686 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:25,687 INFO L519 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] [2021-03-11 00:31:25,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:25,902 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:25,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 151 times [2021-03-11 00:31:25,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:25,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632592995] [2021-03-11 00:31:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:26,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632592995] [2021-03-11 00:31:26,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019773671] [2021-03-11 00:31:26,084 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 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 [2021-03-11 00:31:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:26,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:31:26,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:26,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:26,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:31:26,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120826207] [2021-03-11 00:31:26,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:31:26,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:26,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:31:26,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:31:26,573 INFO L87 Difference]: Start difference. First operand 44583 states and 171502 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) [2021-03-11 00:31:31,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:31,725 INFO L93 Difference]: Finished difference Result 61654 states and 229149 transitions. [2021-03-11 00:31:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-11 00:31:31,729 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 [2021-03-11 00:31:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:31,958 INFO L225 Difference]: With dead ends: 61654 [2021-03-11 00:31:31,958 INFO L226 Difference]: Without dead ends: 61646 [2021-03-11 00:31:31,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 3310.5ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-03-11 00:31:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61646 states. [2021-03-11 00:31:33,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61646 to 43473. [2021-03-11 00:31:33,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43473 states, 43472 states have (on average 3.8658216783216783) internal successors, (168055), 43472 states have internal predecessors, (168055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43473 states to 43473 states and 168055 transitions. [2021-03-11 00:31:33,724 INFO L78 Accepts]: Start accepts. Automaton has 43473 states and 168055 transitions. Word has length 28 [2021-03-11 00:31:33,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:33,724 INFO L480 AbstractCegarLoop]: Abstraction has 43473 states and 168055 transitions. [2021-03-11 00:31:33,724 INFO L481 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) [2021-03-11 00:31:33,724 INFO L276 IsEmpty]: Start isEmpty. Operand 43473 states and 168055 transitions. [2021-03-11 00:31:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:31:33,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:33,812 INFO L519 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] [2021-03-11 00:31:34,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-03-11 00:31:34,013 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 152 times [2021-03-11 00:31:34,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:34,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009751979] [2021-03-11 00:31:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:34,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009751979] [2021-03-11 00:31:34,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735285494] [2021-03-11 00:31:34,215 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 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 [2021-03-11 00:31:34,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:31:34,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:34,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:31:34,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:34,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:34,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:31:34,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441366035] [2021-03-11 00:31:34,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:31:34,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:34,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:31:34,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:31:34,745 INFO L87 Difference]: Start difference. First operand 43473 states and 168055 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) [2021-03-11 00:31:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:39,092 INFO L93 Difference]: Finished difference Result 59916 states and 224368 transitions. [2021-03-11 00:31:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:31:39,095 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 [2021-03-11 00:31:39,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:39,312 INFO L225 Difference]: With dead ends: 59916 [2021-03-11 00:31:39,312 INFO L226 Difference]: Without dead ends: 59892 [2021-03-11 00:31:39,313 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 2797.5ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:31:39,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59892 states. [2021-03-11 00:31:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59892 to 43485. [2021-03-11 00:31:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43485 states, 43484 states have (on average 3.8636969919970565) internal successors, (168009), 43484 states have internal predecessors, (168009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43485 states to 43485 states and 168009 transitions. [2021-03-11 00:31:40,873 INFO L78 Accepts]: Start accepts. Automaton has 43485 states and 168009 transitions. Word has length 28 [2021-03-11 00:31:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:40,873 INFO L480 AbstractCegarLoop]: Abstraction has 43485 states and 168009 transitions. [2021-03-11 00:31:40,874 INFO L481 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) [2021-03-11 00:31:40,874 INFO L276 IsEmpty]: Start isEmpty. Operand 43485 states and 168009 transitions. [2021-03-11 00:31:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:31:40,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:40,958 INFO L519 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] [2021-03-11 00:31:41,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:41,159 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:41,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:41,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 153 times [2021-03-11 00:31:41,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:41,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87548886] [2021-03-11 00:31:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:41,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87548886] [2021-03-11 00:31:41,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394528572] [2021-03-11 00:31:41,354 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 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 [2021-03-11 00:31:41,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:31:41,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:41,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:31:41,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:41,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:41,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:31:41,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113112018] [2021-03-11 00:31:41,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:31:41,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:41,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:31:41,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:31:41,878 INFO L87 Difference]: Start difference. First operand 43485 states and 168009 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) [2021-03-11 00:31:46,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:46,148 INFO L93 Difference]: Finished difference Result 61163 states and 227783 transitions. [2021-03-11 00:31:46,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-11 00:31:46,153 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 [2021-03-11 00:31:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:46,370 INFO L225 Difference]: With dead ends: 61163 [2021-03-11 00:31:46,370 INFO L226 Difference]: Without dead ends: 61123 [2021-03-11 00:31:46,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 2732.4ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:31:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61123 states. [2021-03-11 00:31:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61123 to 43617. [2021-03-11 00:31:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43617 states, 43616 states have (on average 3.863008987527513) internal successors, (168489), 43616 states have internal predecessors, (168489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43617 states to 43617 states and 168489 transitions. [2021-03-11 00:31:48,089 INFO L78 Accepts]: Start accepts. Automaton has 43617 states and 168489 transitions. Word has length 28 [2021-03-11 00:31:48,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:48,089 INFO L480 AbstractCegarLoop]: Abstraction has 43617 states and 168489 transitions. [2021-03-11 00:31:48,089 INFO L481 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) [2021-03-11 00:31:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 43617 states and 168489 transitions. [2021-03-11 00:31:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:31:48,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:48,171 INFO L519 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] [2021-03-11 00:31:48,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:48,372 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:48,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:48,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 154 times [2021-03-11 00:31:48,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:48,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819108819] [2021-03-11 00:31:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:48,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819108819] [2021-03-11 00:31:48,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803779713] [2021-03-11 00:31:48,600 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:31:48,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:31:48,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:48,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:31:48,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:49,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:49,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:31:49,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489182459] [2021-03-11 00:31:49,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:31:49,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:49,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:31:49,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:31:49,329 INFO L87 Difference]: Start difference. First operand 43617 states and 168489 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) [2021-03-11 00:31:50,371 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-03-11 00:31:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:55,882 INFO L93 Difference]: Finished difference Result 60432 states and 225635 transitions. [2021-03-11 00:31:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-11 00:31:55,887 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 [2021-03-11 00:31:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:56,118 INFO L225 Difference]: With dead ends: 60432 [2021-03-11 00:31:56,118 INFO L226 Difference]: Without dead ends: 60432 [2021-03-11 00:31:56,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 4517.2ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-03-11 00:31:56,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60432 states. [2021-03-11 00:31:57,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60432 to 44522. [2021-03-11 00:31:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 3.8534624109970577) internal successors, (171560), 44521 states have internal predecessors, (171560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 171560 transitions. [2021-03-11 00:31:57,864 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 171560 transitions. Word has length 28 [2021-03-11 00:31:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:57,865 INFO L480 AbstractCegarLoop]: Abstraction has 44522 states and 171560 transitions. [2021-03-11 00:31:57,865 INFO L481 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) [2021-03-11 00:31:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 171560 transitions. [2021-03-11 00:31:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:31:57,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:57,943 INFO L519 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] [2021-03-11 00:31:58,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:58,147 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:58,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:58,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 155 times [2021-03-11 00:31:58,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:58,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688911425] [2021-03-11 00:31:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:58,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688911425] [2021-03-11 00:31:58,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979967298] [2021-03-11 00:31:58,337 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 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 [2021-03-11 00:31:58,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:31:58,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:58,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:31:58,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:59,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:59,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:31:59,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098209952] [2021-03-11 00:31:59,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:31:59,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:59,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:31:59,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:31:59,034 INFO L87 Difference]: Start difference. First operand 44522 states and 171560 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) [2021-03-11 00:32:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:04,487 INFO L93 Difference]: Finished difference Result 59813 states and 223888 transitions. [2021-03-11 00:32:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-11 00:32:04,491 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 [2021-03-11 00:32:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:04,710 INFO L225 Difference]: With dead ends: 59813 [2021-03-11 00:32:04,710 INFO L226 Difference]: Without dead ends: 59805 [2021-03-11 00:32:04,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 3499.0ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-03-11 00:32:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59805 states. [2021-03-11 00:32:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59805 to 44446. [2021-03-11 00:32:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44446 states, 44445 states have (on average 3.8547418157273032) internal successors, (171324), 44445 states have internal predecessors, (171324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44446 states to 44446 states and 171324 transitions. [2021-03-11 00:32:06,343 INFO L78 Accepts]: Start accepts. Automaton has 44446 states and 171324 transitions. Word has length 28 [2021-03-11 00:32:06,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:06,343 INFO L480 AbstractCegarLoop]: Abstraction has 44446 states and 171324 transitions. [2021-03-11 00:32:06,343 INFO L481 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) [2021-03-11 00:32:06,343 INFO L276 IsEmpty]: Start isEmpty. Operand 44446 states and 171324 transitions. [2021-03-11 00:32:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:32:06,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:06,429 INFO L519 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] [2021-03-11 00:32:06,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:06,629 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 156 times [2021-03-11 00:32:06,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:06,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963744412] [2021-03-11 00:32:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:06,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963744412] [2021-03-11 00:32:06,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309052915] [2021-03-11 00:32:06,820 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 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 [2021-03-11 00:32:06,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:32:06,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:06,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:32:06,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:07,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:07,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:32:07,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831790261] [2021-03-11 00:32:07,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:32:07,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:07,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:32:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:32:07,452 INFO L87 Difference]: Start difference. First operand 44446 states and 171324 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) [2021-03-11 00:32:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:12,480 INFO L93 Difference]: Finished difference Result 59290 states and 222642 transitions. [2021-03-11 00:32:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-11 00:32:12,484 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 [2021-03-11 00:32:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:12,707 INFO L225 Difference]: With dead ends: 59290 [2021-03-11 00:32:12,708 INFO L226 Difference]: Without dead ends: 59266 [2021-03-11 00:32:12,708 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 3277.2ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:32:12,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59266 states. [2021-03-11 00:32:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59266 to 44432. [2021-03-11 00:32:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44432 states, 44431 states have (on average 3.8547185523620895) internal successors, (171269), 44431 states have internal predecessors, (171269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44432 states to 44432 states and 171269 transitions. [2021-03-11 00:32:14,339 INFO L78 Accepts]: Start accepts. Automaton has 44432 states and 171269 transitions. Word has length 28 [2021-03-11 00:32:14,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:14,339 INFO L480 AbstractCegarLoop]: Abstraction has 44432 states and 171269 transitions. [2021-03-11 00:32:14,339 INFO L481 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) [2021-03-11 00:32:14,339 INFO L276 IsEmpty]: Start isEmpty. Operand 44432 states and 171269 transitions. [2021-03-11 00:32:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:32:14,420 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:14,420 INFO L519 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] [2021-03-11 00:32:14,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:14,620 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 157 times [2021-03-11 00:32:14,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:14,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567618162] [2021-03-11 00:32:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:14,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567618162] [2021-03-11 00:32:14,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643704546] [2021-03-11 00:32:14,824 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 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 [2021-03-11 00:32:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:14,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:32:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:15,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:15,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:32:15,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517447817] [2021-03-11 00:32:15,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:32:15,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:15,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:32:15,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:32:15,420 INFO L87 Difference]: Start difference. First operand 44432 states and 171269 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) [2021-03-11 00:32:17,815 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-03-11 00:32:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:20,075 INFO L93 Difference]: Finished difference Result 59072 states and 221949 transitions. [2021-03-11 00:32:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-11 00:32:20,079 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 [2021-03-11 00:32:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:20,300 INFO L225 Difference]: With dead ends: 59072 [2021-03-11 00:32:20,300 INFO L226 Difference]: Without dead ends: 59032 [2021-03-11 00:32:20,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 3032.2ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-03-11 00:32:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59032 states. [2021-03-11 00:32:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59032 to 44781. [2021-03-11 00:32:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44781 states, 44780 states have (on average 3.856587762393926) internal successors, (172698), 44780 states have internal predecessors, (172698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44781 states to 44781 states and 172698 transitions. [2021-03-11 00:32:22,010 INFO L78 Accepts]: Start accepts. Automaton has 44781 states and 172698 transitions. Word has length 28 [2021-03-11 00:32:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:22,010 INFO L480 AbstractCegarLoop]: Abstraction has 44781 states and 172698 transitions. [2021-03-11 00:32:22,010 INFO L481 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) [2021-03-11 00:32:22,010 INFO L276 IsEmpty]: Start isEmpty. Operand 44781 states and 172698 transitions. [2021-03-11 00:32:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:32:22,094 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:22,095 INFO L519 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] [2021-03-11 00:32:22,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-03-11 00:32:22,295 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:22,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:22,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 158 times [2021-03-11 00:32:22,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:22,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428786619] [2021-03-11 00:32:22,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:22,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428786619] [2021-03-11 00:32:22,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086074832] [2021-03-11 00:32:22,511 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 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 [2021-03-11 00:32:22,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:32:22,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:32:22,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:23,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:23,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:32:23,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834214729] [2021-03-11 00:32:23,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:32:23,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:23,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:32:23,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:32:23,192 INFO L87 Difference]: Start difference. First operand 44781 states and 172698 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) [2021-03-11 00:32:24,483 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2021-03-11 00:32:28,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:28,553 INFO L93 Difference]: Finished difference Result 71883 states and 267354 transitions. [2021-03-11 00:32:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:32:28,557 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 [2021-03-11 00:32:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:29,064 INFO L225 Difference]: With dead ends: 71883 [2021-03-11 00:32:29,065 INFO L226 Difference]: Without dead ends: 71883 [2021-03-11 00:32:29,065 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 3430.9ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:32:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71883 states. [2021-03-11 00:32:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71883 to 45947. [2021-03-11 00:32:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45947 states, 45946 states have (on average 3.870913681278022) internal successors, (177853), 45946 states have internal predecessors, (177853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45947 states to 45947 states and 177853 transitions. [2021-03-11 00:32:30,828 INFO L78 Accepts]: Start accepts. Automaton has 45947 states and 177853 transitions. Word has length 28 [2021-03-11 00:32:30,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:30,828 INFO L480 AbstractCegarLoop]: Abstraction has 45947 states and 177853 transitions. [2021-03-11 00:32:30,828 INFO L481 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) [2021-03-11 00:32:30,828 INFO L276 IsEmpty]: Start isEmpty. Operand 45947 states and 177853 transitions. [2021-03-11 00:32:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:32:30,940 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:30,940 INFO L519 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] [2021-03-11 00:32:31,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-03-11 00:32:31,141 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:31,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 159 times [2021-03-11 00:32:31,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:31,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923565759] [2021-03-11 00:32:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:31,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923565759] [2021-03-11 00:32:31,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050291320] [2021-03-11 00:32:31,358 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 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 [2021-03-11 00:32:31,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:32:31,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:31,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:32:31,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:31,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:31,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:32:31,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562970962] [2021-03-11 00:32:31,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:32:31,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:31,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:32:31,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:32:31,977 INFO L87 Difference]: Start difference. First operand 45947 states and 177853 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) [2021-03-11 00:32:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:37,077 INFO L93 Difference]: Finished difference Result 65842 states and 248215 transitions. [2021-03-11 00:32:37,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-11 00:32:37,081 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 [2021-03-11 00:32:37,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:37,310 INFO L225 Difference]: With dead ends: 65842 [2021-03-11 00:32:37,310 INFO L226 Difference]: Without dead ends: 65842 [2021-03-11 00:32:37,310 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 3008.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-03-11 00:32:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65842 states. [2021-03-11 00:32:38,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65842 to 45977. [2021-03-11 00:32:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45977 states, 45976 states have (on average 3.8707151557334263) internal successors, (177960), 45976 states have internal predecessors, (177960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45977 states to 45977 states and 177960 transitions. [2021-03-11 00:32:38,970 INFO L78 Accepts]: Start accepts. Automaton has 45977 states and 177960 transitions. Word has length 28 [2021-03-11 00:32:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:38,970 INFO L480 AbstractCegarLoop]: Abstraction has 45977 states and 177960 transitions. [2021-03-11 00:32:38,970 INFO L481 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) [2021-03-11 00:32:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 45977 states and 177960 transitions. [2021-03-11 00:32:39,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:32:39,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:39,057 INFO L519 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] [2021-03-11 00:32:39,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-03-11 00:32:39,257 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:39,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 160 times [2021-03-11 00:32:39,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:39,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339734751] [2021-03-11 00:32:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:39,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339734751] [2021-03-11 00:32:39,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544791068] [2021-03-11 00:32:39,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:32:39,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:32:39,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:39,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:32:39,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:40,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:40,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:32:40,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731047680] [2021-03-11 00:32:40,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:32:40,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:32:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:32:40,174 INFO L87 Difference]: Start difference. First operand 45977 states and 177960 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) [2021-03-11 00:32:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:47,115 INFO L93 Difference]: Finished difference Result 66878 states and 251166 transitions. [2021-03-11 00:32:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-03-11 00:32:47,121 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 [2021-03-11 00:32:47,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:47,354 INFO L225 Difference]: With dead ends: 66878 [2021-03-11 00:32:47,354 INFO L226 Difference]: Without dead ends: 66878 [2021-03-11 00:32:47,355 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 4899.4ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-03-11 00:32:47,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66878 states. [2021-03-11 00:32:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66878 to 46241. [2021-03-11 00:32:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46241 states, 46240 states have (on average 3.867171280276817) internal successors, (178818), 46240 states have internal predecessors, (178818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46241 states to 46241 states and 178818 transitions. [2021-03-11 00:32:49,142 INFO L78 Accepts]: Start accepts. Automaton has 46241 states and 178818 transitions. Word has length 28 [2021-03-11 00:32:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:49,143 INFO L480 AbstractCegarLoop]: Abstraction has 46241 states and 178818 transitions. [2021-03-11 00:32:49,143 INFO L481 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) [2021-03-11 00:32:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 46241 states and 178818 transitions. [2021-03-11 00:32:49,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:32:49,246 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:49,246 INFO L519 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] [2021-03-11 00:32:49,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-03-11 00:32:49,447 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:49,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:49,447 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 161 times [2021-03-11 00:32:49,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:49,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122036735] [2021-03-11 00:32:49,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:49,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122036735] [2021-03-11 00:32:49,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619799529] [2021-03-11 00:32:49,653 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 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 [2021-03-11 00:32:49,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:32:49,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:32:49,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:50,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:50,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:32:50,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767330209] [2021-03-11 00:32:50,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:32:50,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:50,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:32:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:32:50,351 INFO L87 Difference]: Start difference. First operand 46241 states and 178818 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) [2021-03-11 00:32:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:56,223 INFO L93 Difference]: Finished difference Result 65887 states and 248347 transitions. [2021-03-11 00:32:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-11 00:32:56,227 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 [2021-03-11 00:32:56,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:56,449 INFO L225 Difference]: With dead ends: 65887 [2021-03-11 00:32:56,449 INFO L226 Difference]: Without dead ends: 65883 [2021-03-11 00:32:56,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 3726.7ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-03-11 00:32:56,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65883 states. [2021-03-11 00:32:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65883 to 45877. [2021-03-11 00:32:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45877 states, 45876 states have (on average 3.8709128956317027) internal successors, (177582), 45876 states have internal predecessors, (177582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45877 states to 45877 states and 177582 transitions. [2021-03-11 00:32:58,064 INFO L78 Accepts]: Start accepts. Automaton has 45877 states and 177582 transitions. Word has length 28 [2021-03-11 00:32:58,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:58,064 INFO L480 AbstractCegarLoop]: Abstraction has 45877 states and 177582 transitions. [2021-03-11 00:32:58,064 INFO L481 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) [2021-03-11 00:32:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand 45877 states and 177582 transitions. [2021-03-11 00:32:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:32:58,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:58,132 INFO L519 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] [2021-03-11 00:32:58,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-03-11 00:32:58,332 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:58,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:58,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 162 times [2021-03-11 00:32:58,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:58,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874425445] [2021-03-11 00:32:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:58,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874425445] [2021-03-11 00:32:58,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916251633] [2021-03-11 00:32:58,543 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 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 [2021-03-11 00:32:58,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:32:58,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:58,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:32:58,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:59,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:59,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:32:59,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132945366] [2021-03-11 00:32:59,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:32:59,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:59,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:32:59,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:32:59,233 INFO L87 Difference]: Start difference. First operand 45877 states and 177582 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) [2021-03-11 00:33:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:03,170 INFO L93 Difference]: Finished difference Result 60177 states and 228553 transitions. [2021-03-11 00:33:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:33:03,174 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 [2021-03-11 00:33:03,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:03,383 INFO L225 Difference]: With dead ends: 60177 [2021-03-11 00:33:03,383 INFO L226 Difference]: Without dead ends: 60177 [2021-03-11 00:33:03,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 2780.3ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:33:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60177 states. [2021-03-11 00:33:04,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60177 to 45893. [2021-03-11 00:33:04,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45893 states, 45892 states have (on average 3.8727882855399636) internal successors, (177730), 45892 states have internal predecessors, (177730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45893 states to 45893 states and 177730 transitions. [2021-03-11 00:33:04,920 INFO L78 Accepts]: Start accepts. Automaton has 45893 states and 177730 transitions. Word has length 28 [2021-03-11 00:33:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:04,920 INFO L480 AbstractCegarLoop]: Abstraction has 45893 states and 177730 transitions. [2021-03-11 00:33:04,921 INFO L481 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) [2021-03-11 00:33:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 45893 states and 177730 transitions. [2021-03-11 00:33:05,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:05,007 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:05,007 INFO L519 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] [2021-03-11 00:33:05,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:05,208 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:05,208 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 163 times [2021-03-11 00:33:05,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:05,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474302341] [2021-03-11 00:33:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:05,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474302341] [2021-03-11 00:33:05,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937772296] [2021-03-11 00:33:05,421 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 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 [2021-03-11 00:33:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:05,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:05,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:06,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:06,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:33:06,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849655456] [2021-03-11 00:33:06,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:33:06,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:33:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:33:06,074 INFO L87 Difference]: Start difference. First operand 45893 states and 177730 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) [2021-03-11 00:33:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:09,342 INFO L93 Difference]: Finished difference Result 59367 states and 226324 transitions. [2021-03-11 00:33:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:33:09,346 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 [2021-03-11 00:33:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:09,565 INFO L225 Difference]: With dead ends: 59367 [2021-03-11 00:33:09,565 INFO L226 Difference]: Without dead ends: 59355 [2021-03-11 00:33:09,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1994.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:33:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59355 states. [2021-03-11 00:33:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59355 to 45827. [2021-03-11 00:33:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45827 states, 45826 states have (on average 3.873936193427312) internal successors, (177527), 45826 states have internal predecessors, (177527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45827 states to 45827 states and 177527 transitions. [2021-03-11 00:33:11,187 INFO L78 Accepts]: Start accepts. Automaton has 45827 states and 177527 transitions. Word has length 28 [2021-03-11 00:33:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:11,187 INFO L480 AbstractCegarLoop]: Abstraction has 45827 states and 177527 transitions. [2021-03-11 00:33:11,187 INFO L481 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) [2021-03-11 00:33:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 45827 states and 177527 transitions. [2021-03-11 00:33:11,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:11,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:11,275 INFO L519 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] [2021-03-11 00:33:11,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-03-11 00:33:11,476 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:11,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 164 times [2021-03-11 00:33:11,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:11,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664302420] [2021-03-11 00:33:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:11,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664302420] [2021-03-11 00:33:11,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388666618] [2021-03-11 00:33:11,716 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 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 [2021-03-11 00:33:11,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:33:11,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:11,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:11,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:12,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:12,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:33:12,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156489049] [2021-03-11 00:33:12,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:33:12,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:12,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:33:12,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:33:12,428 INFO L87 Difference]: Start difference. First operand 45827 states and 177527 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) [2021-03-11 00:33:15,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:15,168 INFO L93 Difference]: Finished difference Result 50560 states and 193090 transitions. [2021-03-11 00:33:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:33:15,173 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 [2021-03-11 00:33:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:15,357 INFO L225 Difference]: With dead ends: 50560 [2021-03-11 00:33:15,358 INFO L226 Difference]: Without dead ends: 50560 [2021-03-11 00:33:15,358 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1656.4ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:33:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50560 states. [2021-03-11 00:33:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50560 to 46035. [2021-03-11 00:33:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46035 states, 46034 states have (on average 3.871464569665899) internal successors, (178219), 46034 states have internal predecessors, (178219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46035 states to 46035 states and 178219 transitions. [2021-03-11 00:33:16,902 INFO L78 Accepts]: Start accepts. Automaton has 46035 states and 178219 transitions. Word has length 28 [2021-03-11 00:33:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:16,902 INFO L480 AbstractCegarLoop]: Abstraction has 46035 states and 178219 transitions. [2021-03-11 00:33:16,902 INFO L481 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) [2021-03-11 00:33:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 46035 states and 178219 transitions. [2021-03-11 00:33:17,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:17,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:17,003 INFO L519 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] [2021-03-11 00:33:17,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:17,203 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:17,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:17,204 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 165 times [2021-03-11 00:33:17,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:17,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714671019] [2021-03-11 00:33:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:17,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714671019] [2021-03-11 00:33:17,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782447788] [2021-03-11 00:33:17,360 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 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 [2021-03-11 00:33:17,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:33:17,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:17,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:17,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:17,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:17,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:33:17,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22089313] [2021-03-11 00:33:17,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:33:17,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:17,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:33:17,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:33:17,914 INFO L87 Difference]: Start difference. First operand 46035 states and 178219 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) [2021-03-11 00:33:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:20,298 INFO L93 Difference]: Finished difference Result 50371 states and 192582 transitions. [2021-03-11 00:33:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:33:20,301 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 [2021-03-11 00:33:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:20,669 INFO L225 Difference]: With dead ends: 50371 [2021-03-11 00:33:20,670 INFO L226 Difference]: Without dead ends: 50367 [2021-03-11 00:33:20,670 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1410.4ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:33:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50367 states. [2021-03-11 00:33:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50367 to 45975. [2021-03-11 00:33:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45975 states, 45974 states have (on average 3.8723408883281856) internal successors, (178027), 45974 states have internal predecessors, (178027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45975 states to 45975 states and 178027 transitions. [2021-03-11 00:33:21,949 INFO L78 Accepts]: Start accepts. Automaton has 45975 states and 178027 transitions. Word has length 28 [2021-03-11 00:33:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:21,949 INFO L480 AbstractCegarLoop]: Abstraction has 45975 states and 178027 transitions. [2021-03-11 00:33:21,949 INFO L481 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) [2021-03-11 00:33:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 45975 states and 178027 transitions. [2021-03-11 00:33:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:22,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:22,027 INFO L519 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] [2021-03-11 00:33:22,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:22,228 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:22,228 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 82 times [2021-03-11 00:33:22,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:22,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963819206] [2021-03-11 00:33:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:22,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963819206] [2021-03-11 00:33:22,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375662347] [2021-03-11 00:33:22,430 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 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 [2021-03-11 00:33:22,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:33:22,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:22,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:22,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:22,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:22,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-03-11 00:33:22,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005913666] [2021-03-11 00:33:22,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:33:22,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:22,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:33:22,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:33:22,879 INFO L87 Difference]: Start difference. First operand 45975 states and 178027 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) [2021-03-11 00:33:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:25,207 INFO L93 Difference]: Finished difference Result 50452 states and 192814 transitions. [2021-03-11 00:33:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:33:25,210 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 [2021-03-11 00:33:25,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:25,354 INFO L225 Difference]: With dead ends: 50452 [2021-03-11 00:33:25,354 INFO L226 Difference]: Without dead ends: 50452 [2021-03-11 00:33:25,354 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1188.0ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:33:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50452 states. [2021-03-11 00:33:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50452 to 46095. [2021-03-11 00:33:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46095 states, 46094 states have (on average 3.870243415628932) internal successors, (178395), 46094 states have internal predecessors, (178395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46095 states to 46095 states and 178395 transitions. [2021-03-11 00:33:26,906 INFO L78 Accepts]: Start accepts. Automaton has 46095 states and 178395 transitions. Word has length 28 [2021-03-11 00:33:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:26,906 INFO L480 AbstractCegarLoop]: Abstraction has 46095 states and 178395 transitions. [2021-03-11 00:33:26,906 INFO L481 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) [2021-03-11 00:33:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 46095 states and 178395 transitions. [2021-03-11 00:33:26,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:26,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:26,994 INFO L519 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] [2021-03-11 00:33:27,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:27,194 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 83 times [2021-03-11 00:33:27,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:27,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073728356] [2021-03-11 00:33:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:33:27,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073728356] [2021-03-11 00:33:27,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677608966] [2021-03-11 00:33:27,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:33:27,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:33:27,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:27,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:27,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:33:27,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:27,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-11 00:33:27,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318084209] [2021-03-11 00:33:27,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:33:27,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:27,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:33:27,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:33:27,832 INFO L87 Difference]: Start difference. First operand 46095 states and 178395 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) [2021-03-11 00:33:29,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:29,661 INFO L93 Difference]: Finished difference Result 50630 states and 193451 transitions. [2021-03-11 00:33:29,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:33:29,665 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 [2021-03-11 00:33:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:29,857 INFO L225 Difference]: With dead ends: 50630 [2021-03-11 00:33:29,857 INFO L226 Difference]: Without dead ends: 50618 [2021-03-11 00:33:29,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 898.2ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:33:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50618 states. [2021-03-11 00:33:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50618 to 46227. [2021-03-11 00:33:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46227 states, 46226 states have (on average 3.868407389780643) internal successors, (178821), 46226 states have internal predecessors, (178821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46227 states to 46227 states and 178821 transitions. [2021-03-11 00:33:31,351 INFO L78 Accepts]: Start accepts. Automaton has 46227 states and 178821 transitions. Word has length 28 [2021-03-11 00:33:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:31,351 INFO L480 AbstractCegarLoop]: Abstraction has 46227 states and 178821 transitions. [2021-03-11 00:33:31,351 INFO L481 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) [2021-03-11 00:33:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 46227 states and 178821 transitions. [2021-03-11 00:33:31,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:31,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:31,452 INFO L519 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] [2021-03-11 00:33:31,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:31,667 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:31,667 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 84 times [2021-03-11 00:33:31,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:31,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255972329] [2021-03-11 00:33:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:31,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255972329] [2021-03-11 00:33:31,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275796135] [2021-03-11 00:33:31,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:33:31,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:33:31,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:31,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:32,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:32,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-03-11 00:33:32,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911619201] [2021-03-11 00:33:32,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:33:32,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:32,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:33:32,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:33:32,331 INFO L87 Difference]: Start difference. First operand 46227 states and 178821 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) [2021-03-11 00:33:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:34,361 INFO L93 Difference]: Finished difference Result 50594 states and 193367 transitions. [2021-03-11 00:33:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:33:34,364 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 [2021-03-11 00:33:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:34,509 INFO L225 Difference]: With dead ends: 50594 [2021-03-11 00:33:34,509 INFO L226 Difference]: Without dead ends: 50574 [2021-03-11 00:33:34,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1015.7ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:33:34,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50574 states. [2021-03-11 00:33:35,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50574 to 46227. [2021-03-11 00:33:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46227 states, 46226 states have (on average 3.8683208583913813) internal successors, (178817), 46226 states have internal predecessors, (178817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:35,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46227 states to 46227 states and 178817 transitions. [2021-03-11 00:33:35,921 INFO L78 Accepts]: Start accepts. Automaton has 46227 states and 178817 transitions. Word has length 28 [2021-03-11 00:33:35,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:35,921 INFO L480 AbstractCegarLoop]: Abstraction has 46227 states and 178817 transitions. [2021-03-11 00:33:35,922 INFO L481 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) [2021-03-11 00:33:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 46227 states and 178817 transitions. [2021-03-11 00:33:36,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:36,219 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:36,219 INFO L519 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] [2021-03-11 00:33:36,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-03-11 00:33:36,420 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:36,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 166 times [2021-03-11 00:33:36,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:36,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365732357] [2021-03-11 00:33:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:36,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365732357] [2021-03-11 00:33:36,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957115393] [2021-03-11 00:33:36,625 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 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 [2021-03-11 00:33:36,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:33:36,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:36,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:36,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:37,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:37,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:33:37,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358463087] [2021-03-11 00:33:37,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:33:37,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:37,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:33:37,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:33:37,175 INFO L87 Difference]: Start difference. First operand 46227 states and 178817 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) [2021-03-11 00:33:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:38,987 INFO L93 Difference]: Finished difference Result 51188 states and 196382 transitions. [2021-03-11 00:33:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:33:38,992 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 [2021-03-11 00:33:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:39,191 INFO L225 Difference]: With dead ends: 51188 [2021-03-11 00:33:39,191 INFO L226 Difference]: Without dead ends: 51175 [2021-03-11 00:33:39,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 808.1ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:33:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51175 states. [2021-03-11 00:33:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51175 to 48960. [2021-03-11 00:33:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48960 states, 48959 states have (on average 3.8768152944300334) internal successors, (189805), 48959 states have internal predecessors, (189805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48960 states to 48960 states and 189805 transitions. [2021-03-11 00:33:40,791 INFO L78 Accepts]: Start accepts. Automaton has 48960 states and 189805 transitions. Word has length 28 [2021-03-11 00:33:40,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:40,791 INFO L480 AbstractCegarLoop]: Abstraction has 48960 states and 189805 transitions. [2021-03-11 00:33:40,791 INFO L481 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) [2021-03-11 00:33:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 48960 states and 189805 transitions. [2021-03-11 00:33:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:40,893 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:40,893 INFO L519 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] [2021-03-11 00:33:41,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-03-11 00:33:41,093 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 167 times [2021-03-11 00:33:41,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:41,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629501230] [2021-03-11 00:33:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:41,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629501230] [2021-03-11 00:33:41,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25360319] [2021-03-11 00:33:41,297 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 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 [2021-03-11 00:33:41,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:33:41,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:41,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:41,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:41,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:41,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:33:41,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128874624] [2021-03-11 00:33:41,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:33:41,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:41,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:33:41,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:33:41,858 INFO L87 Difference]: Start difference. First operand 48960 states and 189805 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) [2021-03-11 00:33:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:44,046 INFO L93 Difference]: Finished difference Result 54536 states and 207828 transitions. [2021-03-11 00:33:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:33:44,063 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 [2021-03-11 00:33:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:44,262 INFO L225 Difference]: With dead ends: 54536 [2021-03-11 00:33:44,262 INFO L226 Difference]: Without dead ends: 54536 [2021-03-11 00:33:44,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 959.4ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:33:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54536 states. [2021-03-11 00:33:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54536 to 43500. [2021-03-11 00:33:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43500 states, 43499 states have (on average 3.8642957309363433) internal successors, (168093), 43499 states have internal predecessors, (168093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43500 states to 43500 states and 168093 transitions. [2021-03-11 00:33:45,733 INFO L78 Accepts]: Start accepts. Automaton has 43500 states and 168093 transitions. Word has length 28 [2021-03-11 00:33:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:45,733 INFO L480 AbstractCegarLoop]: Abstraction has 43500 states and 168093 transitions. [2021-03-11 00:33:45,733 INFO L481 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) [2021-03-11 00:33:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 43500 states and 168093 transitions. [2021-03-11 00:33:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:45,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:45,805 INFO L519 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] [2021-03-11 00:33:46,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-03-11 00:33:46,005 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:46,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:46,006 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 168 times [2021-03-11 00:33:46,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:46,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507727122] [2021-03-11 00:33:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:46,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507727122] [2021-03-11 00:33:46,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751203280] [2021-03-11 00:33:46,230 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 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 [2021-03-11 00:33:46,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:33:46,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:46,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:46,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:46,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:46,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:33:46,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715713403] [2021-03-11 00:33:46,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:33:46,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:46,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:33:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:33:46,809 INFO L87 Difference]: Start difference. First operand 43500 states and 168093 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) [2021-03-11 00:33:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:49,431 INFO L93 Difference]: Finished difference Result 48376 states and 184512 transitions. [2021-03-11 00:33:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:33:49,435 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 [2021-03-11 00:33:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:49,556 INFO L225 Difference]: With dead ends: 48376 [2021-03-11 00:33:49,556 INFO L226 Difference]: Without dead ends: 48376 [2021-03-11 00:33:49,557 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1326.3ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:33:49,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48376 states. [2021-03-11 00:33:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48376 to 44333. [2021-03-11 00:33:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44333 states, 44332 states have (on average 3.8629206893440404) internal successors, (171251), 44332 states have internal predecessors, (171251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44333 states to 44333 states and 171251 transitions. [2021-03-11 00:33:50,828 INFO L78 Accepts]: Start accepts. Automaton has 44333 states and 171251 transitions. Word has length 28 [2021-03-11 00:33:50,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:50,828 INFO L480 AbstractCegarLoop]: Abstraction has 44333 states and 171251 transitions. [2021-03-11 00:33:50,828 INFO L481 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) [2021-03-11 00:33:50,828 INFO L276 IsEmpty]: Start isEmpty. Operand 44333 states and 171251 transitions. [2021-03-11 00:33:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:50,913 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:50,913 INFO L519 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] [2021-03-11 00:33:51,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-03-11 00:33:51,114 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 169 times [2021-03-11 00:33:51,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:51,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835164192] [2021-03-11 00:33:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:51,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835164192] [2021-03-11 00:33:51,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227342015] [2021-03-11 00:33:51,346 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 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 [2021-03-11 00:33:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:51,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:51,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:51,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:51,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-11 00:33:51,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943475096] [2021-03-11 00:33:51,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:33:51,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:51,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:33:51,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:33:51,861 INFO L87 Difference]: Start difference. First operand 44333 states and 171251 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) [2021-03-11 00:33:53,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:53,796 INFO L93 Difference]: Finished difference Result 46090 states and 177112 transitions. [2021-03-11 00:33:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:33:53,801 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 [2021-03-11 00:33:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:53,960 INFO L225 Difference]: With dead ends: 46090 [2021-03-11 00:33:53,961 INFO L226 Difference]: Without dead ends: 46090 [2021-03-11 00:33:53,961 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 749.2ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:33:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46090 states. [2021-03-11 00:33:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46090 to 44341. [2021-03-11 00:33:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44341 states, 44340 states have (on average 3.8627649977447) internal successors, (171275), 44340 states have internal predecessors, (171275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44341 states to 44341 states and 171275 transitions. [2021-03-11 00:33:55,256 INFO L78 Accepts]: Start accepts. Automaton has 44341 states and 171275 transitions. Word has length 28 [2021-03-11 00:33:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:55,257 INFO L480 AbstractCegarLoop]: Abstraction has 44341 states and 171275 transitions. [2021-03-11 00:33:55,257 INFO L481 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) [2021-03-11 00:33:55,257 INFO L276 IsEmpty]: Start isEmpty. Operand 44341 states and 171275 transitions. [2021-03-11 00:33:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:55,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:55,327 INFO L519 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] [2021-03-11 00:33:55,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:55,528 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:55,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:55,528 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 170 times [2021-03-11 00:33:55,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:55,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075438737] [2021-03-11 00:33:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:55,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075438737] [2021-03-11 00:33:55,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836208450] [2021-03-11 00:33:55,749 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 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 [2021-03-11 00:33:55,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:33:55,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:55,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:56,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:56,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:33:56,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787055324] [2021-03-11 00:33:56,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:33:56,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:56,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:33:56,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:33:56,300 INFO L87 Difference]: Start difference. First operand 44341 states and 171275 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) [2021-03-11 00:33:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:58,265 INFO L93 Difference]: Finished difference Result 45810 states and 176190 transitions. [2021-03-11 00:33:58,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:33:58,270 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 [2021-03-11 00:33:58,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:58,425 INFO L225 Difference]: With dead ends: 45810 [2021-03-11 00:33:58,425 INFO L226 Difference]: Without dead ends: 45810 [2021-03-11 00:33:58,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 831.5ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:33:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45810 states. [2021-03-11 00:33:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45810 to 44235. [2021-03-11 00:33:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44235 states, 44234 states have (on average 3.862436135099697) internal successors, (170851), 44234 states have internal predecessors, (170851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:59,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44235 states to 44235 states and 170851 transitions. [2021-03-11 00:33:59,554 INFO L78 Accepts]: Start accepts. Automaton has 44235 states and 170851 transitions. Word has length 28 [2021-03-11 00:33:59,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:59,554 INFO L480 AbstractCegarLoop]: Abstraction has 44235 states and 170851 transitions. [2021-03-11 00:33:59,554 INFO L481 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) [2021-03-11 00:33:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 44235 states and 170851 transitions. [2021-03-11 00:33:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:33:59,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:59,643 INFO L519 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] [2021-03-11 00:33:59,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:59,846 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:59,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:59,846 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 171 times [2021-03-11 00:33:59,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:59,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455267367] [2021-03-11 00:33:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:00,527 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-11 00:34:00,719 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-11 00:34:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:01,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455267367] [2021-03-11 00:34:01,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940865389] [2021-03-11 00:34:01,145 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 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 [2021-03-11 00:34:01,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:34:01,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:01,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-11 00:34:01,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:03,051 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:34:03,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:34:03,053 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 [2021-03-11 00:34:03,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:34:03,363 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-03-11 00:34:03,364 INFO L628 ElimStorePlain]: treesize reduction 68, result has 39.8 percent of original size [2021-03-11 00:34:03,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:34:03,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:82 [2021-03-11 00:34:03,826 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:34:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:03,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:03,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-03-11 00:34:03,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027024502] [2021-03-11 00:34:03,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:34:03,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:03,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:34:03,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:34:03,937 INFO L87 Difference]: Start difference. First operand 44235 states and 170851 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) [2021-03-11 00:34:04,918 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-11 00:34:05,158 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-11 00:34:05,533 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:34:06,149 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-11 00:34:06,758 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-11 00:34:07,152 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-11 00:34:07,889 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-11 00:34:08,714 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-03-11 00:34:09,558 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-11 00:34:09,942 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-03-11 00:34:10,784 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-03-11 00:34:11,328 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:34:11,743 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-11 00:34:12,610 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-03-11 00:34:13,227 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-11 00:34:13,783 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-11 00:34:14,854 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-03-11 00:34:15,351 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-11 00:34:16,618 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-03-11 00:34:17,862 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-03-11 00:34:18,062 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:34:19,130 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-03-11 00:34:20,194 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-11 00:34:20,988 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-03-11 00:34:21,329 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-11 00:34:22,002 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-11 00:34:22,318 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 15 [2021-03-11 00:34:22,818 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:34:23,382 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-11 00:34:24,102 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-11 00:34:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:24,368 INFO L93 Difference]: Finished difference Result 51482 states and 191998 transitions. [2021-03-11 00:34:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:34:24,375 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 [2021-03-11 00:34:24,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:24,564 INFO L225 Difference]: With dead ends: 51482 [2021-03-11 00:34:24,564 INFO L226 Difference]: Without dead ends: 51422 [2021-03-11 00:34:24,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 17787.9ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:34:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51422 states. [2021-03-11 00:34:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51422 to 44332. [2021-03-11 00:34:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44332 states, 44331 states have (on average 3.861857390990503) internal successors, (171200), 44331 states have internal predecessors, (171200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44332 states to 44332 states and 171200 transitions. [2021-03-11 00:34:25,775 INFO L78 Accepts]: Start accepts. Automaton has 44332 states and 171200 transitions. Word has length 30 [2021-03-11 00:34:25,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:25,775 INFO L480 AbstractCegarLoop]: Abstraction has 44332 states and 171200 transitions. [2021-03-11 00:34:25,775 INFO L481 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) [2021-03-11 00:34:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand 44332 states and 171200 transitions. [2021-03-11 00:34:26,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:34:26,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:26,110 INFO L519 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] [2021-03-11 00:34:26,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:26,327 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 172 times [2021-03-11 00:34:26,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:26,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131986499] [2021-03-11 00:34:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:27,033 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-11 00:34:27,235 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-11 00:34:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:27,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131986499] [2021-03-11 00:34:27,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081622632] [2021-03-11 00:34:27,655 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 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 [2021-03-11 00:34:27,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:34:27,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:27,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:34:27,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:29,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:34:29,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:34:29,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:34:29,161 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 [2021-03-11 00:34:29,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:34:29,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:34:29,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:34:29,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-03-11 00:34:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:29,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:29,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-11 00:34:29,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706165502] [2021-03-11 00:34:29,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:34:29,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:29,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:34:29,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:34:29,354 INFO L87 Difference]: Start difference. First operand 44332 states and 171200 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) [2021-03-11 00:34:29,889 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-11 00:34:30,238 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:34:30,720 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 00:34:31,529 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-11 00:34:31,888 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:34:32,532 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-03-11 00:34:33,361 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-03-11 00:34:33,826 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:34:34,247 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:34:34,860 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-11 00:34:35,519 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-03-11 00:34:35,833 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-11 00:34:36,217 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-11 00:34:36,582 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-11 00:34:36,826 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:34:37,262 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-03-11 00:34:37,911 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-11 00:34:38,425 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:34:38,913 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-11 00:34:39,262 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-11 00:34:39,700 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:34:40,160 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-11 00:34:40,982 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-11 00:34:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:41,259 INFO L93 Difference]: Finished difference Result 51496 states and 192084 transitions. [2021-03-11 00:34:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:34:41,265 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 [2021-03-11 00:34:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:41,441 INFO L225 Difference]: With dead ends: 51496 [2021-03-11 00:34:41,442 INFO L226 Difference]: Without dead ends: 51466 [2021-03-11 00:34:41,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 11121.9ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:34:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51466 states. [2021-03-11 00:34:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51466 to 44378. [2021-03-11 00:34:42,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44378 states, 44377 states have (on average 3.861527367780607) internal successors, (171363), 44377 states have internal predecessors, (171363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44378 states to 44378 states and 171363 transitions. [2021-03-11 00:34:42,576 INFO L78 Accepts]: Start accepts. Automaton has 44378 states and 171363 transitions. Word has length 30 [2021-03-11 00:34:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:42,576 INFO L480 AbstractCegarLoop]: Abstraction has 44378 states and 171363 transitions. [2021-03-11 00:34:42,576 INFO L481 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) [2021-03-11 00:34:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 44378 states and 171363 transitions. [2021-03-11 00:34:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:34:42,662 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:42,662 INFO L519 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] [2021-03-11 00:34:42,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-03-11 00:34:42,863 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:42,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:42,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 173 times [2021-03-11 00:34:42,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:42,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606530098] [2021-03-11 00:34:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:43,473 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-11 00:34:43,714 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:34:43,923 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-11 00:34:44,218 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-11 00:34:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:44,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606530098] [2021-03-11 00:34:44,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485855850] [2021-03-11 00:34:44,595 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 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 [2021-03-11 00:34:44,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:34:44,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:44,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-11 00:34:44,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:46,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:34:46,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:34:46,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:34:46,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:34:46,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:34:46,273 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 [2021-03-11 00:34:46,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:34:46,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:34:46,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:34:46,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-03-11 00:34:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:46,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:46,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-03-11 00:34:46,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269678970] [2021-03-11 00:34:46,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:34:46,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:46,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:34:46,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:34:46,381 INFO L87 Difference]: Start difference. First operand 44378 states and 171363 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) [2021-03-11 00:34:46,758 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-11 00:34:47,341 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-11 00:34:48,252 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-11 00:34:48,686 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-11 00:34:49,181 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:34:49,513 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-11 00:34:50,224 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-11 00:34:51,391 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-03-11 00:34:51,967 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-11 00:34:52,463 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-11 00:34:52,824 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-03-11 00:34:53,191 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-11 00:34:53,558 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-11 00:34:54,056 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-11 00:34:55,476 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-03-11 00:34:56,076 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-11 00:34:56,304 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:34:56,819 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-11 00:34:57,720 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-03-11 00:34:58,372 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-11 00:34:59,260 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2021-03-11 00:35:00,209 WARN L205 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-11 00:35:00,854 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-03-11 00:35:01,281 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:35:01,867 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-11 00:35:02,461 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-11 00:35:04,017 WARN L205 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-03-11 00:35:04,544 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-11 00:35:04,881 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-11 00:35:05,232 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-11 00:35:05,613 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:35:06,377 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-03-11 00:35:07,315 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-11 00:35:07,594 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-03-11 00:35:08,063 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-11 00:35:08,577 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-11 00:35:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:10,161 INFO L93 Difference]: Finished difference Result 62882 states and 234711 transitions. [2021-03-11 00:35:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:35:10,168 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 [2021-03-11 00:35:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:10,393 INFO L225 Difference]: With dead ends: 62882 [2021-03-11 00:35:10,394 INFO L226 Difference]: Without dead ends: 62867 [2021-03-11 00:35:10,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 20682.4ms TimeCoverageRelationStatistics Valid=541, Invalid=3619, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:35:10,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62867 states. [2021-03-11 00:35:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62867 to 44417. [2021-03-11 00:35:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44417 states, 44416 states have (on average 3.8612436959654177) internal successors, (171501), 44416 states have internal predecessors, (171501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44417 states to 44417 states and 171501 transitions. [2021-03-11 00:35:11,682 INFO L78 Accepts]: Start accepts. Automaton has 44417 states and 171501 transitions. Word has length 30 [2021-03-11 00:35:11,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:11,682 INFO L480 AbstractCegarLoop]: Abstraction has 44417 states and 171501 transitions. [2021-03-11 00:35:11,682 INFO L481 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) [2021-03-11 00:35:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 44417 states and 171501 transitions. [2021-03-11 00:35:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:35:11,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:11,756 INFO L519 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] [2021-03-11 00:35:11,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-03-11 00:35:11,956 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash -547667522, now seen corresponding path program 174 times [2021-03-11 00:35:11,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:11,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548286725] [2021-03-11 00:35:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:12,657 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-11 00:35:12,855 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-11 00:35:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:13,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548286725] [2021-03-11 00:35:13,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064339434] [2021-03-11 00:35:13,292 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 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 [2021-03-11 00:35:13,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:35:13,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:35:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-11 00:35:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:15,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:35:15,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:15,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:15,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:15,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:35:15,331 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 [2021-03-11 00:35:15,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:35:15,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:35:15,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:35:15,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:5 [2021-03-11 00:35:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:15,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:15,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-11 00:35:15,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19075053] [2021-03-11 00:35:15,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:35:15,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:15,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:35:15,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:35:15,516 INFO L87 Difference]: Start difference. First operand 44417 states and 171501 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) [2021-03-11 00:35:16,429 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-11 00:35:16,810 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:35:17,298 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 00:35:18,072 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-03-11 00:35:18,331 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:35:18,686 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:35:19,449 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-03-11 00:35:20,366 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-03-11 00:35:20,985 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-11 00:35:21,493 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:35:22,306 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-03-11 00:35:22,765 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-11 00:35:23,548 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-11 00:35:24,033 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-11 00:35:24,224 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:35:24,684 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-11 00:35:25,240 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:35:25,494 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-11 00:35:26,030 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-11 00:35:26,359 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-03-11 00:35:26,672 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-03-11 00:35:27,393 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-11 00:35:28,187 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-11 00:35:28,763 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:35:29,477 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-03-11 00:35:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:29,721 INFO L93 Difference]: Finished difference Result 53657 states and 198704 transitions. [2021-03-11 00:35:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:35:29,725 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 [2021-03-11 00:35:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:29,864 INFO L225 Difference]: With dead ends: 53657 [2021-03-11 00:35:29,864 INFO L226 Difference]: Without dead ends: 53585 [2021-03-11 00:35:29,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 12481.3ms TimeCoverageRelationStatistics Valid=511, Invalid=2141, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:35:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53585 states. [2021-03-11 00:35:30,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53585 to 44441. [2021-03-11 00:35:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44441 states, 44440 states have (on average 3.860936093609361) internal successors, (171580), 44440 states have internal predecessors, (171580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44441 states to 44441 states and 171580 transitions. [2021-03-11 00:35:31,135 INFO L78 Accepts]: Start accepts. Automaton has 44441 states and 171580 transitions. Word has length 30 [2021-03-11 00:35:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:31,135 INFO L480 AbstractCegarLoop]: Abstraction has 44441 states and 171580 transitions. [2021-03-11 00:35:31,135 INFO L481 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) [2021-03-11 00:35:31,135 INFO L276 IsEmpty]: Start isEmpty. Operand 44441 states and 171580 transitions. [2021-03-11 00:35:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:35:31,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:31,222 INFO L519 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] [2021-03-11 00:35:31,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-03-11 00:35:31,423 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:31,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1002714042, now seen corresponding path program 175 times [2021-03-11 00:35:31,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:31,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207651444] [2021-03-11 00:35:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:32,036 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-11 00:35:32,545 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-11 00:35:32,747 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-11 00:35:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:33,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207651444] [2021-03-11 00:35:33,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093854422] [2021-03-11 00:35:33,105 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 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 [2021-03-11 00:35:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:33,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-11 00:35:33,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:34,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:34,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:34,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:34,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:35:34,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:35:34,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:35:34,449 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 [2021-03-11 00:35:34,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:35:34,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:35:34,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:35:34,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-03-11 00:35:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:34,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:34,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-03-11 00:35:34,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900717410] [2021-03-11 00:35:34,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:35:34,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:34,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:35:34,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:35:34,561 INFO L87 Difference]: Start difference. First operand 44441 states and 171580 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) [2021-03-11 00:35:34,878 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-11 00:35:35,494 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-11 00:35:36,520 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-11 00:35:36,745 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:35:37,135 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-11 00:35:37,591 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-11 00:35:37,972 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-11 00:35:38,413 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:35:39,135 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:35:39,563 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:35:40,601 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-03-11 00:35:41,029 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-11 00:35:41,486 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-11 00:35:41,908 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-11 00:35:42,301 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-11 00:35:42,808 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-11 00:35:43,620 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-11 00:35:44,829 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-03-11 00:35:45,258 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:35:45,790 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-11 00:35:46,370 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-11 00:35:46,969 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-11 00:35:47,467 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-11 00:35:48,136 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:35:48,856 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-11 00:35:49,402 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-11 00:35:50,688 WARN L205 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-03-11 00:35:51,461 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-11 00:35:51,735 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:35:52,124 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:35:52,962 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-11 00:35:53,660 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-11 00:35:54,825 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-11 00:35:55,605 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:35:55,891 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:35:56,128 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-11 00:35:56,744 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:35:57,072 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-11 00:35:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:58,304 INFO L93 Difference]: Finished difference Result 70235 states and 261042 transitions. [2021-03-11 00:35:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-11 00:35:58,310 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 [2021-03-11 00:35:58,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:58,554 INFO L225 Difference]: With dead ends: 70235 [2021-03-11 00:35:58,554 INFO L226 Difference]: Without dead ends: 70220 [2021-03-11 00:35:58,555 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 19062.9ms TimeCoverageRelationStatistics Valid=540, Invalid=3750, Unknown=0, NotChecked=0, Total=4290 [2021-03-11 00:35:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70220 states. [2021-03-11 00:35:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70220 to 44499. [2021-03-11 00:35:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44499 states, 44498 states have (on average 3.860825205627219) internal successors, (171799), 44498 states have internal predecessors, (171799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44499 states to 44499 states and 171799 transitions. [2021-03-11 00:36:00,058 INFO L78 Accepts]: Start accepts. Automaton has 44499 states and 171799 transitions. Word has length 30 [2021-03-11 00:36:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:00,058 INFO L480 AbstractCegarLoop]: Abstraction has 44499 states and 171799 transitions. [2021-03-11 00:36:00,058 INFO L481 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) [2021-03-11 00:36:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 44499 states and 171799 transitions. [2021-03-11 00:36:00,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:36:00,135 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:00,135 INFO L519 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] [2021-03-11 00:36:00,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:00,335 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:00,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:00,336 INFO L82 PathProgramCache]: Analyzing trace with hash 26395198, now seen corresponding path program 176 times [2021-03-11 00:36:00,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:00,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295857776] [2021-03-11 00:36:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:00,751 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-11 00:36:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:01,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295857776] [2021-03-11 00:36:01,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985851154] [2021-03-11 00:36:01,391 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 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 [2021-03-11 00:36:01,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:36:01,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:01,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-11 00:36:01,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:02,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:36:02,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:36:02,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:36:02,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:36:03,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:36:03,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-03-11 00:36:03,081 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:36:03,204 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 15 [2021-03-11 00:36:03,206 INFO L628 ElimStorePlain]: treesize reduction 21, result has 44.7 percent of original size [2021-03-11 00:36:03,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:36:03,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:17 [2021-03-11 00:36:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:03,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:03,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-11 00:36:03,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161784396] [2021-03-11 00:36:03,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:36:03,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:36:03,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:36:03,575 INFO L87 Difference]: Start difference. First operand 44499 states and 171799 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) [2021-03-11 00:36:04,060 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-11 00:36:04,477 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-11 00:36:05,124 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-11 00:36:05,660 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-11 00:36:06,638 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-11 00:36:07,109 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:36:07,641 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-11 00:36:07,937 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-11 00:36:08,373 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-11 00:36:08,947 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:36:09,541 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-11 00:36:10,374 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-11 00:36:10,799 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-11 00:36:11,340 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-11 00:36:12,498 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-03-11 00:36:13,284 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-11 00:36:13,676 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:36:14,008 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 00:36:14,539 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-11 00:36:15,116 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-11 00:36:15,608 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 00:36:16,394 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-11 00:36:17,112 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-11 00:36:17,447 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-11 00:36:18,016 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:36:18,438 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-11 00:36:18,770 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 00:36:19,761 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-11 00:36:20,718 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-11 00:36:21,390 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-11 00:36:21,888 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-11 00:36:22,710 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-03-11 00:36:23,156 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-11 00:36:24,638 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-11 00:36:24,954 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:36:25,484 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-03-11 00:36:25,986 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-03-11 00:36:26,562 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:36:27,009 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:36:27,219 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:36:27,808 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-03-11 00:36:28,359 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:36:28,663 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:36:29,332 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:36:29,704 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:36:29,985 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:36:30,269 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:36:30,859 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-03-11 00:36:31,740 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-03-11 00:36:33,047 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:36:33,956 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:36:34,496 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:36:35,138 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-03-11 00:36:35,971 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:36:36,724 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-11 00:36:37,863 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-11 00:36:38,339 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:36:38,966 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:36:39,454 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-11 00:36:40,116 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-11 00:36:41,049 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-11 00:36:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:42,131 INFO L93 Difference]: Finished difference Result 74130 states and 274173 transitions. [2021-03-11 00:36:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-03-11 00:36:42,137 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 [2021-03-11 00:36:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:42,353 INFO L225 Difference]: With dead ends: 74130 [2021-03-11 00:36:42,353 INFO L226 Difference]: Without dead ends: 74100 [2021-03-11 00:36:42,353 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2953 ImplicationChecksByTransitivity, 25960.4ms TimeCoverageRelationStatistics Valid=712, Invalid=8218, Unknown=0, NotChecked=0, Total=8930 [2021-03-11 00:36:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74100 states. Received shutdown request... [2021-03-11 00:36:43,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:43,111 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:36:43,114 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:36:43,115 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:36:43 BasicIcfg [2021-03-11 00:36:43,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:36:43,115 INFO L168 Benchmark]: Toolchain (without parser) took 841907.34 ms. Allocated memory was 255.9 MB in the beginning and 11.0 GB in the end (delta: 10.7 GB). Free memory was 236.2 MB in the beginning and 8.2 GB in the end (delta: -8.0 GB). Peak memory consumption was 3.1 GB. Max. memory is 16.0 GB. [2021-03-11 00:36:43,115 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:36:43,115 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.50 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:36:43,115 INFO L168 Benchmark]: Boogie Preprocessor took 14.03 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.3 MB in the end (delta: 938.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:36:43,116 INFO L168 Benchmark]: RCFGBuilder took 228.37 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 237.4 MB in the end (delta: -4.1 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-03-11 00:36:43,116 INFO L168 Benchmark]: TraceAbstraction took 841639.00 ms. Allocated memory was 255.9 MB in the beginning and 11.0 GB in the end (delta: 10.7 GB). Free memory was 236.9 MB in the beginning and 8.2 GB in the end (delta: -8.0 GB). Peak memory consumption was 3.1 GB. Max. memory is 16.0 GB. [2021-03-11 00:36:43,116 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 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.50 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.03 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.3 MB in the end (delta: 938.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 228.37 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 237.4 MB in the end (delta: -4.1 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 841639.00 ms. Allocated memory was 255.9 MB in the beginning and 11.0 GB in the end (delta: 10.7 GB). Free memory was 236.9 MB in the beginning and 8.2 GB in the end (delta: -8.0 GB). Peak memory consumption was 3.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 841547.6ms, OverallIterations: 262, TraceHistogramMax: 3, EmptinessCheckTime: 6057.6ms, AutomataDifference: 562476.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11665 SDtfs, 72597 SDslu, 89778 SDs, 0 SdLazy, 148929 SolverSat, 12962 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 78083.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16848 GetRequests, 5574 SyntacticMatches, 297 SemanticMatches, 10977 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184279 ImplicationChecksByTransitivity, 388498.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48960occurred in iteration=252, InterpolantAutomatonStates: 9791, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 94902.2ms AutomataMinimizationTime, 262 MinimizatonAttempts, 1365905 StatesRemovedByMinimization, 260 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 769.2ms SsaConstructionTime, 2245.0ms SatisfiabilityAnalysisTime, 118201.4ms InterpolantComputationTime, 13970 NumberOfCodeBlocks, 13970 NumberOfCodeBlocksAsserted, 907 NumberOfCheckSat, 13448 ConstructedInterpolants, 129 QuantifiedInterpolants, 134362 SizeOfPredicates, 1144 NumberOfNonLiveVariables, 18195 ConjunctsInSsa, 3931 ConjunctsInUnsatCore, 522 InterpolantComputations, 2 PerfectInterpolantSequences, 1041/4479 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