/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-bad/three-array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:48:57,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:48:57,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:48:57,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:48:57,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:48:57,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:48:57,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:48:57,767 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 [2021-02-19 18:48:57,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:48:57,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:48:57,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:48:57,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:48:57,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:48:57,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:48:57,787 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:48:57,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:48:57,788 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:48:57,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:48:57,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:48:57,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:48:57,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:48:57,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:48:57,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:48:57,789 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:48:57,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:48:57,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:48:57,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:48:57,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:48:57,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:48:57,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:48:57,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:48:57,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:48:57,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:48:57,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:48:57,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:48:57,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:48:57,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:48:57,791 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:48:57,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:48:57,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:48:58,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:48:58,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:48:58,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:48:58,069 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:48:58,070 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:48:58,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl [2021-02-19 18:48:58,071 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl' [2021-02-19 18:48:58,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:48:58,115 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:48:58,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:48:58,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:48:58,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:48:58,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:48:58" (1/1) ... [2021-02-19 18:48:58,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:48:58" (1/1) ... [2021-02-19 18:48:58,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:48:58,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:48:58,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:48:58,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:48:58,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:48:58" (1/1) ... [2021-02-19 18:48:58,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:48:58" (1/1) ... [2021-02-19 18:48:58,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:48:58" (1/1) ... [2021-02-19 18:48:58,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:48:58" (1/1) ... [2021-02-19 18:48:58,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:48:58" (1/1) ... [2021-02-19 18:48:58,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:48:58" (1/1) ... [2021-02-19 18:48:58,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:48:58" (1/1) ... [2021-02-19 18:48:58,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:48:58,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:48:58,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:48:58,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:48:58,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:48:58" (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 [2021-02-19 18:48:58,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:48:58,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:48:58,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:48:58,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:48:58,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:48:58,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:48:58,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:48:58,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:48:58,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:48:58,215 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 18:48:58,215 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 18:48:58,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 18:48:58,215 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 18:48:58,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:48:58,396 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:48:58,398 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:48:58 BoogieIcfgContainer [2021-02-19 18:48:58,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:48:58,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:48:58,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:48:58,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:48:58,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:48:58" (1/2) ... [2021-02-19 18:48:58,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f217e21 and model type three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:48:58, skipping insertion in model container [2021-02-19 18:48:58,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:48:58" (2/2) ... [2021-02-19 18:48:58,422 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum-alt.wvr.bpl [2021-02-19 18:48:58,427 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:48:58,427 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:48:58,430 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:48:58,430 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:48:58,457 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 18:48:58,470 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 18:48:58,484 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:48:58,484 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:48:58,484 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:48:58,484 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:48:58,484 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:48:58,484 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:48:58,485 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:48:58,485 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:48:58,492 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 78 flow [2021-02-19 18:48:58,505 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 110 states have (on average 2.8363636363636364) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 110 states have (on average 2.8363636363636364) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:58,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 18:48:58,514 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:58,514 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:58,515 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:58,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1348417125, now seen corresponding path program 1 times [2021-02-19 18:48:58,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:58,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607919595] [2021-02-19 18:48:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:58,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607919595] [2021-02-19 18:48:58,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:48:58,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 18:48:58,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141566009] [2021-02-19 18:48:58,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:48:58,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:58,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:48:58,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:48:58,757 INFO L87 Difference]: Start difference. First operand has 112 states, 110 states have (on average 2.8363636363636364) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:58,785 INFO L93 Difference]: Finished difference Result 215 states and 615 transitions. [2021-02-19 18:48:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:48:58,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 18:48:58,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:58,795 INFO L225 Difference]: With dead ends: 215 [2021-02-19 18:48:58,795 INFO L226 Difference]: Without dead ends: 200 [2021-02-19 18:48:58,797 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:48:58,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-19 18:48:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2021-02-19 18:48:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.856164383561644) internal successors, (417), 146 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 417 transitions. [2021-02-19 18:48:58,860 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 417 transitions. Word has length 16 [2021-02-19 18:48:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:58,860 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 417 transitions. [2021-02-19 18:48:58,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 417 transitions. [2021-02-19 18:48:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:48:58,862 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:58,862 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:58,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:48:58,862 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash 509256581, now seen corresponding path program 1 times [2021-02-19 18:48:58,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:58,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098550706] [2021-02-19 18:48:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:58,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098550706] [2021-02-19 18:48:58,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082176160] [2021-02-19 18:48:58,901 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 [2021-02-19 18:48:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:58,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:48:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:59,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:59,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-02-19 18:48:59,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39391758] [2021-02-19 18:48:59,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:48:59,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:59,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:48:59,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:48:59,059 INFO L87 Difference]: Start difference. First operand 147 states and 417 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:59,174 INFO L93 Difference]: Finished difference Result 345 states and 956 transitions. [2021-02-19 18:48:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:48:59,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:48:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:59,181 INFO L225 Difference]: With dead ends: 345 [2021-02-19 18:48:59,181 INFO L226 Difference]: Without dead ends: 345 [2021-02-19 18:48:59,181 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:48:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-02-19 18:48:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 174. [2021-02-19 18:48:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.953757225433526) internal successors, (511), 173 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 511 transitions. [2021-02-19 18:48:59,204 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 511 transitions. Word has length 18 [2021-02-19 18:48:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:59,204 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 511 transitions. [2021-02-19 18:48:59,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 511 transitions. [2021-02-19 18:48:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:48:59,209 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:59,209 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:59,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 18:48:59,422 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:59,423 INFO L82 PathProgramCache]: Analyzing trace with hash 567959623, now seen corresponding path program 1 times [2021-02-19 18:48:59,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:59,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585884789] [2021-02-19 18:48:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:59,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585884789] [2021-02-19 18:48:59,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:48:59,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:48:59,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407877991] [2021-02-19 18:48:59,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:48:59,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:59,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:48:59,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:48:59,453 INFO L87 Difference]: Start difference. First operand 174 states and 511 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:48:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:59,495 INFO L93 Difference]: Finished difference Result 242 states and 652 transitions. [2021-02-19 18:48:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:48:59,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 [2021-02-19 18:48:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:59,500 INFO L225 Difference]: With dead ends: 242 [2021-02-19 18:48:59,500 INFO L226 Difference]: Without dead ends: 232 [2021-02-19 18:48:59,501 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:48:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-02-19 18:48:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 190. [2021-02-19 18:48:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.8412698412698414) internal successors, (537), 189 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 537 transitions. [2021-02-19 18:48:59,514 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 537 transitions. Word has length 18 [2021-02-19 18:48:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:59,514 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 537 transitions. [2021-02-19 18:48:59,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:48:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 537 transitions. [2021-02-19 18:48:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:48:59,518 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:59,518 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:59,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:48:59,518 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:59,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2118341187, now seen corresponding path program 1 times [2021-02-19 18:48:59,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:59,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506544746] [2021-02-19 18:48:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:59,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506544746] [2021-02-19 18:48:59,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:48:59,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:48:59,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504801495] [2021-02-19 18:48:59,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:48:59,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:59,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:48:59,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:48:59,542 INFO L87 Difference]: Start difference. First operand 190 states and 537 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:48:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:59,579 INFO L93 Difference]: Finished difference Result 325 states and 890 transitions. [2021-02-19 18:48:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:48:59,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 [2021-02-19 18:48:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:59,581 INFO L225 Difference]: With dead ends: 325 [2021-02-19 18:48:59,581 INFO L226 Difference]: Without dead ends: 307 [2021-02-19 18:48:59,581 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:48:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-02-19 18:48:59,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 235. [2021-02-19 18:48:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.893162393162393) internal successors, (677), 234 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 677 transitions. [2021-02-19 18:48:59,588 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 677 transitions. Word has length 18 [2021-02-19 18:48:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:59,588 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 677 transitions. [2021-02-19 18:48:59,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:48:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 677 transitions. [2021-02-19 18:48:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:48:59,589 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:59,589 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:59,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:48:59,590 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:59,590 INFO L82 PathProgramCache]: Analyzing trace with hash 540297219, now seen corresponding path program 2 times [2021-02-19 18:48:59,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:59,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092561987] [2021-02-19 18:48:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:59,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092561987] [2021-02-19 18:48:59,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:48:59,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:48:59,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256434525] [2021-02-19 18:48:59,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:48:59,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:59,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:48:59,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:48:59,618 INFO L87 Difference]: Start difference. First operand 235 states and 677 transitions. 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) [2021-02-19 18:48:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:59,647 INFO L93 Difference]: Finished difference Result 277 states and 750 transitions. [2021-02-19 18:48:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:48:59,648 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 [2021-02-19 18:48:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:59,649 INFO L225 Difference]: With dead ends: 277 [2021-02-19 18:48:59,649 INFO L226 Difference]: Without dead ends: 265 [2021-02-19 18:48:59,650 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:48:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-02-19 18:48:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2021-02-19 18:48:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.8341232227488153) internal successors, (598), 211 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 598 transitions. [2021-02-19 18:48:59,656 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 598 transitions. Word has length 18 [2021-02-19 18:48:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:59,656 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 598 transitions. [2021-02-19 18:48:59,656 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) [2021-02-19 18:48:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 598 transitions. [2021-02-19 18:48:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:48:59,657 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:59,657 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:59,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:48:59,657 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:59,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1106437285, now seen corresponding path program 2 times [2021-02-19 18:48:59,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:59,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832290303] [2021-02-19 18:48:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:59,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832290303] [2021-02-19 18:48:59,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:48:59,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:48:59,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887773080] [2021-02-19 18:48:59,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:48:59,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:59,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:48:59,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:48:59,679 INFO L87 Difference]: Start difference. First operand 212 states and 598 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:48:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:59,715 INFO L93 Difference]: Finished difference Result 275 states and 762 transitions. [2021-02-19 18:48:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:48:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 [2021-02-19 18:48:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:59,719 INFO L225 Difference]: With dead ends: 275 [2021-02-19 18:48:59,719 INFO L226 Difference]: Without dead ends: 261 [2021-02-19 18:48:59,720 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:48:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-02-19 18:48:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 215. [2021-02-19 18:48:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.850467289719626) internal successors, (610), 214 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:59,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 610 transitions. [2021-02-19 18:48:59,726 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 610 transitions. Word has length 18 [2021-02-19 18:48:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:59,726 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 610 transitions. [2021-02-19 18:48:59,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:48:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 610 transitions. [2021-02-19 18:48:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:48:59,731 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:59,731 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:59,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 18:48:59,731 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:59,731 INFO L82 PathProgramCache]: Analyzing trace with hash -510194267, now seen corresponding path program 3 times [2021-02-19 18:48:59,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:59,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163991804] [2021-02-19 18:48:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:59,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163991804] [2021-02-19 18:48:59,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:48:59,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:48:59,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708849376] [2021-02-19 18:48:59,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:48:59,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:59,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:48:59,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:48:59,764 INFO L87 Difference]: Start difference. First operand 215 states and 610 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:48:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:59,782 INFO L93 Difference]: Finished difference Result 222 states and 635 transitions. [2021-02-19 18:48:59,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:48:59,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 [2021-02-19 18:48:59,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:59,784 INFO L225 Difference]: With dead ends: 222 [2021-02-19 18:48:59,784 INFO L226 Difference]: Without dead ends: 222 [2021-02-19 18:48:59,784 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:48:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-02-19 18:48:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2021-02-19 18:48:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.8679245283018866) internal successors, (608), 212 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 608 transitions. [2021-02-19 18:48:59,789 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 608 transitions. Word has length 18 [2021-02-19 18:48:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:59,789 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 608 transitions. [2021-02-19 18:48:59,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:48:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 608 transitions. [2021-02-19 18:48:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:48:59,790 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:59,790 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:59,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:48:59,790 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:59,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:59,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1685858301, now seen corresponding path program 4 times [2021-02-19 18:48:59,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:59,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848753109] [2021-02-19 18:48:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:59,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848753109] [2021-02-19 18:48:59,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:48:59,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:48:59,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079949474] [2021-02-19 18:48:59,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:48:59,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:59,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:48:59,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:48:59,811 INFO L87 Difference]: Start difference. First operand 213 states and 608 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:48:59,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:59,835 INFO L93 Difference]: Finished difference Result 226 states and 656 transitions. [2021-02-19 18:48:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:48:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 [2021-02-19 18:48:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:59,837 INFO L225 Difference]: With dead ends: 226 [2021-02-19 18:48:59,838 INFO L226 Difference]: Without dead ends: 226 [2021-02-19 18:48:59,838 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:48:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-02-19 18:48:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 215. [2021-02-19 18:48:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-02-19 18:48:59,843 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 18 [2021-02-19 18:48:59,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:59,843 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-02-19 18:48:59,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2021-02-19 18:48:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-02-19 18:48:59,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:48:59,844 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:59,844 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:59,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 18:48:59,844 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:59,845 INFO L82 PathProgramCache]: Analyzing trace with hash -116983933, now seen corresponding path program 5 times [2021-02-19 18:48:59,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:59,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199299500] [2021-02-19 18:48:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:48:59,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199299500] [2021-02-19 18:48:59,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:48:59,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:48:59,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330158844] [2021-02-19 18:48:59,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:48:59,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:59,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:48:59,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:48:59,889 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. 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) [2021-02-19 18:48:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:59,947 INFO L93 Difference]: Finished difference Result 212 states and 606 transitions. [2021-02-19 18:48:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:48:59,947 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 [2021-02-19 18:48:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:59,955 INFO L225 Difference]: With dead ends: 212 [2021-02-19 18:48:59,955 INFO L226 Difference]: Without dead ends: 204 [2021-02-19 18:48:59,955 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:48:59,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-02-19 18:48:59,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2021-02-19 18:48:59,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.901554404145078) internal successors, (560), 193 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:59,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 560 transitions. [2021-02-19 18:48:59,960 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 560 transitions. Word has length 18 [2021-02-19 18:48:59,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:59,960 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 560 transitions. [2021-02-19 18:48:59,960 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) [2021-02-19 18:48:59,960 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 560 transitions. [2021-02-19 18:48:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 18:48:59,960 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:59,961 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:59,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 18:48:59,961 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:48:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:59,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1588528487, now seen corresponding path program 1 times [2021-02-19 18:48:59,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:59,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420066367] [2021-02-19 18:48:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:59,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420066367] [2021-02-19 18:48:59,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364145080] [2021-02-19 18:48:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:00,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:49:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:00,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:00,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-02-19 18:49:00,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14164148] [2021-02-19 18:49:00,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:49:00,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:00,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:49:00,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:49:00,073 INFO L87 Difference]: Start difference. First operand 194 states and 560 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:00,118 INFO L93 Difference]: Finished difference Result 251 states and 729 transitions. [2021-02-19 18:49:00,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:49:00,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:49:00,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:00,121 INFO L225 Difference]: With dead ends: 251 [2021-02-19 18:49:00,122 INFO L226 Difference]: Without dead ends: 251 [2021-02-19 18:49:00,122 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:49:00,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-02-19 18:49:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 191. [2021-02-19 18:49:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9) internal successors, (551), 190 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 551 transitions. [2021-02-19 18:49:00,127 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 551 transitions. Word has length 20 [2021-02-19 18:49:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:00,127 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 551 transitions. [2021-02-19 18:49:00,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 551 transitions. [2021-02-19 18:49:00,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 18:49:00,127 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:00,127 INFO L506 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] [2021-02-19 18:49:00,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 18:49:00,342 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:00,342 INFO L82 PathProgramCache]: Analyzing trace with hash 937126085, now seen corresponding path program 1 times [2021-02-19 18:49:00,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:00,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462876220] [2021-02-19 18:49:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:00,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462876220] [2021-02-19 18:49:00,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809190841] [2021-02-19 18:49:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 18:49:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:00,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:49:00,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:00,602 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 15 treesize of output 11 [2021-02-19 18:49:00,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:00,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:00,611 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 13 treesize of output 9 [2021-02-19 18:49:00,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:00,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:00,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:00,615 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:20, output treesize:5 [2021-02-19 18:49:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:00,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:00,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 18:49:00,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674939425] [2021-02-19 18:49:00,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:49:00,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:00,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:49:00,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:49:00,653 INFO L87 Difference]: Start difference. First operand 191 states and 551 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-02-19 18:49:00,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:00,748 INFO L93 Difference]: Finished difference Result 377 states and 1096 transitions. [2021-02-19 18:49:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:49:00,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 22 [2021-02-19 18:49:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:00,750 INFO L225 Difference]: With dead ends: 377 [2021-02-19 18:49:00,750 INFO L226 Difference]: Without dead ends: 362 [2021-02-19 18:49:00,750 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:49:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-02-19 18:49:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 270. [2021-02-19 18:49:00,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.95910780669145) internal successors, (796), 269 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 796 transitions. [2021-02-19 18:49:00,757 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 796 transitions. Word has length 22 [2021-02-19 18:49:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:00,757 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 796 transitions. [2021-02-19 18:49:00,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-02-19 18:49:00,757 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 796 transitions. [2021-02-19 18:49:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 18:49:00,758 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:00,758 INFO L506 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] [2021-02-19 18:49:00,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-02-19 18:49:00,976 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:00,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1091271931, now seen corresponding path program 2 times [2021-02-19 18:49:00,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:00,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508931477] [2021-02-19 18:49:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:01,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508931477] [2021-02-19 18:49:01,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335753406] [2021-02-19 18:49:01,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:49:01,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:49:01,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:01,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:49:01,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:01,215 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 18 treesize of output 14 [2021-02-19 18:49:01,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:01,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:01,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:01,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2021-02-19 18:49:01,245 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 13 treesize of output 9 [2021-02-19 18:49:01,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:01,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:01,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:01,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-02-19 18:49:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:01,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:01,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 18:49:01,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017910190] [2021-02-19 18:49:01,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:49:01,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:49:01,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:49:01,287 INFO L87 Difference]: Start difference. First operand 270 states and 796 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:01,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:01,372 INFO L93 Difference]: Finished difference Result 402 states and 1185 transitions. [2021-02-19 18:49:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:49:01,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:49:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:01,374 INFO L225 Difference]: With dead ends: 402 [2021-02-19 18:49:01,374 INFO L226 Difference]: Without dead ends: 387 [2021-02-19 18:49:01,375 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:49:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-02-19 18:49:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 294. [2021-02-19 18:49:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.962457337883959) internal successors, (868), 293 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 868 transitions. [2021-02-19 18:49:01,382 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 868 transitions. Word has length 22 [2021-02-19 18:49:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:01,384 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 868 transitions. [2021-02-19 18:49:01,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:01,384 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 868 transitions. [2021-02-19 18:49:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 18:49:01,386 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:01,386 INFO L506 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] [2021-02-19 18:49:01,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:01,594 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:01,594 INFO L82 PathProgramCache]: Analyzing trace with hash -155337915, now seen corresponding path program 3 times [2021-02-19 18:49:01,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:01,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25748156] [2021-02-19 18:49:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:01,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25748156] [2021-02-19 18:49:01,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661132779] [2021-02-19 18:49:01,674 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 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 [2021-02-19 18:49:01,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:49:01,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:01,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:49:01,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:01,803 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 15 treesize of output 11 [2021-02-19 18:49:01,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:01,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:01,812 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 18 treesize of output 12 [2021-02-19 18:49:01,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:01,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:01,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:01,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:11 [2021-02-19 18:49:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:01,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:01,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 18:49:01,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633053269] [2021-02-19 18:49:01,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:49:01,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:01,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:49:01,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:49:01,846 INFO L87 Difference]: Start difference. First operand 294 states and 868 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-02-19 18:49:01,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:01,897 INFO L93 Difference]: Finished difference Result 461 states and 1361 transitions. [2021-02-19 18:49:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:49:01,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 [2021-02-19 18:49:01,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:01,899 INFO L225 Difference]: With dead ends: 461 [2021-02-19 18:49:01,899 INFO L226 Difference]: Without dead ends: 446 [2021-02-19 18:49:01,900 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:49:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-02-19 18:49:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 312. [2021-02-19 18:49:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.964630225080386) internal successors, (922), 311 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 922 transitions. [2021-02-19 18:49:01,907 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 922 transitions. Word has length 22 [2021-02-19 18:49:01,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:01,909 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 922 transitions. [2021-02-19 18:49:01,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-02-19 18:49:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 922 transitions. [2021-02-19 18:49:01,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 18:49:01,911 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:01,911 INFO L506 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] [2021-02-19 18:49:02,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 18:49:02,122 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:02,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:02,122 INFO L82 PathProgramCache]: Analyzing trace with hash -24373559, now seen corresponding path program 4 times [2021-02-19 18:49:02,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:02,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362188047] [2021-02-19 18:49:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:02,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362188047] [2021-02-19 18:49:02,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118306798] [2021-02-19 18:49:02,205 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:49:02,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:49:02,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:02,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:49:02,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:02,267 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 25 treesize of output 19 [2021-02-19 18:49:02,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:02,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:02,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:02,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:21 [2021-02-19 18:49:02,285 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 20 treesize of output 14 [2021-02-19 18:49:02,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:02,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:02,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:02,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:11 [2021-02-19 18:49:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:02,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:02,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 18:49:02,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626996447] [2021-02-19 18:49:02,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:49:02,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:02,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:49:02,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:49:02,314 INFO L87 Difference]: Start difference. First operand 312 states and 922 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:02,372 INFO L93 Difference]: Finished difference Result 435 states and 1285 transitions. [2021-02-19 18:49:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:49:02,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:49:02,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:02,374 INFO L225 Difference]: With dead ends: 435 [2021-02-19 18:49:02,374 INFO L226 Difference]: Without dead ends: 420 [2021-02-19 18:49:02,374 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:49:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-02-19 18:49:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 330. [2021-02-19 18:49:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.966565349544073) internal successors, (976), 329 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 976 transitions. [2021-02-19 18:49:02,382 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 976 transitions. Word has length 22 [2021-02-19 18:49:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:02,382 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 976 transitions. [2021-02-19 18:49:02,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 976 transitions. [2021-02-19 18:49:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 18:49:02,383 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:02,384 INFO L506 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] [2021-02-19 18:49:02,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:02,598 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:02,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:02,598 INFO L82 PathProgramCache]: Analyzing trace with hash -558408471, now seen corresponding path program 5 times [2021-02-19 18:49:02,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:02,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954234090] [2021-02-19 18:49:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:02,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954234090] [2021-02-19 18:49:02,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841300480] [2021-02-19 18:49:02,649 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 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 [2021-02-19 18:49:02,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:49:02,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:02,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:49:02,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:02,730 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 18 treesize of output 14 [2021-02-19 18:49:02,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:02,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:02,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:02,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2021-02-19 18:49:02,761 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 13 treesize of output 9 [2021-02-19 18:49:02,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:02,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:02,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:02,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:7 [2021-02-19 18:49:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:02,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:02,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 18:49:02,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779705871] [2021-02-19 18:49:02,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:49:02,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:02,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:49:02,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:49:02,791 INFO L87 Difference]: Start difference. First operand 330 states and 976 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:02,886 INFO L93 Difference]: Finished difference Result 471 states and 1393 transitions. [2021-02-19 18:49:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:49:02,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:49:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:02,889 INFO L225 Difference]: With dead ends: 471 [2021-02-19 18:49:02,889 INFO L226 Difference]: Without dead ends: 456 [2021-02-19 18:49:02,890 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:49:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-02-19 18:49:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 342. [2021-02-19 18:49:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-02-19 18:49:02,898 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-02-19 18:49:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:02,898 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-02-19 18:49:02,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-02-19 18:49:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 18:49:02,899 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:02,899 INFO L506 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] [2021-02-19 18:49:03,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 18:49:03,114 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:03,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:03,115 INFO L82 PathProgramCache]: Analyzing trace with hash 429083141, now seen corresponding path program 6 times [2021-02-19 18:49:03,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:03,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686374444] [2021-02-19 18:49:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:03,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686374444] [2021-02-19 18:49:03,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645912032] [2021-02-19 18:49:03,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:03,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 18:49:03,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:03,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:49:03,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:03,255 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 18 treesize of output 14 [2021-02-19 18:49:03,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:03,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:03,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:03,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2021-02-19 18:49:03,278 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 20 treesize of output 14 [2021-02-19 18:49:03,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:03,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:03,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:03,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:11 [2021-02-19 18:49:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:03,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:03,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 18:49:03,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215301970] [2021-02-19 18:49:03,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:49:03,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:03,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:49:03,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:49:03,325 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:03,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:03,412 INFO L93 Difference]: Finished difference Result 463 states and 1369 transitions. [2021-02-19 18:49:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:49:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:49:03,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:03,414 INFO L225 Difference]: With dead ends: 463 [2021-02-19 18:49:03,414 INFO L226 Difference]: Without dead ends: 448 [2021-02-19 18:49:03,415 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:49:03,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-02-19 18:49:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 342. [2021-02-19 18:49:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-02-19 18:49:03,423 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-02-19 18:49:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:03,423 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-02-19 18:49:03,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-02-19 18:49:03,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:03,424 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:03,424 INFO L506 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] [2021-02-19 18:49:03,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 18:49:03,642 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:03,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1275018269, now seen corresponding path program 7 times [2021-02-19 18:49:03,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:03,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002505942] [2021-02-19 18:49:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:03,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002505942] [2021-02-19 18:49:03,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144780626] [2021-02-19 18:49:03,676 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 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 [2021-02-19 18:49:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:03,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:49:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:03,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:03,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 18:49:03,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211894200] [2021-02-19 18:49:03,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:49:03,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:03,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:49:03,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:49:03,757 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-02-19 18:49:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:03,839 INFO L93 Difference]: Finished difference Result 800 states and 2293 transitions. [2021-02-19 18:49:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:49:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 [2021-02-19 18:49:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:03,843 INFO L225 Difference]: With dead ends: 800 [2021-02-19 18:49:03,843 INFO L226 Difference]: Without dead ends: 800 [2021-02-19 18:49:03,844 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:49:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-02-19 18:49:03,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 428. [2021-02-19 18:49:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.0960187353629975) internal successors, (1322), 427 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1322 transitions. [2021-02-19 18:49:03,856 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1322 transitions. Word has length 24 [2021-02-19 18:49:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:03,856 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 1322 transitions. [2021-02-19 18:49:03,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-02-19 18:49:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1322 transitions. [2021-02-19 18:49:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:03,857 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:03,857 INFO L506 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] [2021-02-19 18:49:04,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 18:49:04,070 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:04,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:04,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1853355609, now seen corresponding path program 8 times [2021-02-19 18:49:04,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:04,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525310263] [2021-02-19 18:49:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:04,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525310263] [2021-02-19 18:49:04,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708254370] [2021-02-19 18:49:04,101 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 [2021-02-19 18:49:04,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:49:04,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:49:04,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:04,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:04,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:49:04,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886262246] [2021-02-19 18:49:04,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:49:04,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:04,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:49:04,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:49:04,202 INFO L87 Difference]: Start difference. First operand 428 states and 1322 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2021-02-19 18:49:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:04,591 INFO L93 Difference]: Finished difference Result 1302 states and 3896 transitions. [2021-02-19 18:49:04,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:49:04,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 24 [2021-02-19 18:49:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:04,597 INFO L225 Difference]: With dead ends: 1302 [2021-02-19 18:49:04,597 INFO L226 Difference]: Without dead ends: 1252 [2021-02-19 18:49:04,597 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:49:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-02-19 18:49:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 716. [2021-02-19 18:49:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.2363636363636363) internal successors, (2314), 715 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2314 transitions. [2021-02-19 18:49:04,639 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2314 transitions. Word has length 24 [2021-02-19 18:49:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:04,640 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 2314 transitions. [2021-02-19 18:49:04,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2021-02-19 18:49:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2314 transitions. [2021-02-19 18:49:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:04,642 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:04,642 INFO L506 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] [2021-02-19 18:49:04,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 18:49:04,858 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:04,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:04,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2004642979, now seen corresponding path program 9 times [2021-02-19 18:49:04,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:04,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564526575] [2021-02-19 18:49:04,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:04,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564526575] [2021-02-19 18:49:04,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396293509] [2021-02-19 18:49:04,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:49:04,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:49:04,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:04,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:49:04,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:04,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:04,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 18:49:04,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213363823] [2021-02-19 18:49:04,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:49:04,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:04,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:49:04,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:49:04,955 INFO L87 Difference]: Start difference. First operand 716 states and 2314 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-02-19 18:49:05,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:05,030 INFO L93 Difference]: Finished difference Result 1440 states and 4507 transitions. [2021-02-19 18:49:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:49:05,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 [2021-02-19 18:49:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:05,035 INFO L225 Difference]: With dead ends: 1440 [2021-02-19 18:49:05,035 INFO L226 Difference]: Without dead ends: 1297 [2021-02-19 18:49:05,036 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:49:05,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-02-19 18:49:05,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 986. [2021-02-19 18:49:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.296446700507614) internal successors, (3247), 985 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3247 transitions. [2021-02-19 18:49:05,065 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3247 transitions. Word has length 24 [2021-02-19 18:49:05,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:05,065 INFO L480 AbstractCegarLoop]: Abstraction has 986 states and 3247 transitions. [2021-02-19 18:49:05,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-02-19 18:49:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3247 transitions. [2021-02-19 18:49:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:05,069 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:05,069 INFO L506 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] [2021-02-19 18:49:05,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:05,285 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:05,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:05,286 INFO L82 PathProgramCache]: Analyzing trace with hash -393523795, now seen corresponding path program 10 times [2021-02-19 18:49:05,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:05,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972849712] [2021-02-19 18:49:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:05,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972849712] [2021-02-19 18:49:05,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48235055] [2021-02-19 18:49:05,312 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 [2021-02-19 18:49:05,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:49:05,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:05,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:49:05,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:05,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:05,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:49:05,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588089729] [2021-02-19 18:49:05,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:49:05,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:05,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:49:05,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:49:05,402 INFO L87 Difference]: Start difference. First operand 986 states and 3247 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-02-19 18:49:05,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:05,457 INFO L93 Difference]: Finished difference Result 1349 states and 4231 transitions. [2021-02-19 18:49:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:49:05,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 [2021-02-19 18:49:05,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:05,462 INFO L225 Difference]: With dead ends: 1349 [2021-02-19 18:49:05,462 INFO L226 Difference]: Without dead ends: 1343 [2021-02-19 18:49:05,462 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:49:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-02-19 18:49:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1016. [2021-02-19 18:49:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.2679802955665025) internal successors, (3317), 1015 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3317 transitions. [2021-02-19 18:49:05,485 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3317 transitions. Word has length 24 [2021-02-19 18:49:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:05,485 INFO L480 AbstractCegarLoop]: Abstraction has 1016 states and 3317 transitions. [2021-02-19 18:49:05,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-02-19 18:49:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3317 transitions. [2021-02-19 18:49:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:05,487 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:05,487 INFO L506 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] [2021-02-19 18:49:05,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:05,702 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:05,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:05,702 INFO L82 PathProgramCache]: Analyzing trace with hash 779445761, now seen corresponding path program 11 times [2021-02-19 18:49:05,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:05,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449740614] [2021-02-19 18:49:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:05,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449740614] [2021-02-19 18:49:05,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671837880] [2021-02-19 18:49:05,731 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 [2021-02-19 18:49:05,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:49:05,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:05,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:49:05,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:05,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:05,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:49:05,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282971813] [2021-02-19 18:49:05,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:49:05,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:05,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:49:05,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:49:05,809 INFO L87 Difference]: Start difference. First operand 1016 states and 3317 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-02-19 18:49:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:05,901 INFO L93 Difference]: Finished difference Result 2033 states and 6560 transitions. [2021-02-19 18:49:05,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:49:05,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 [2021-02-19 18:49:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:05,910 INFO L225 Difference]: With dead ends: 2033 [2021-02-19 18:49:05,910 INFO L226 Difference]: Without dead ends: 2018 [2021-02-19 18:49:05,911 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:49:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-02-19 18:49:05,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1477. [2021-02-19 18:49:05,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.432249322493225) internal successors, (5066), 1476 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 5066 transitions. [2021-02-19 18:49:05,953 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 5066 transitions. Word has length 24 [2021-02-19 18:49:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:05,953 INFO L480 AbstractCegarLoop]: Abstraction has 1477 states and 5066 transitions. [2021-02-19 18:49:05,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-02-19 18:49:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 5066 transitions. [2021-02-19 18:49:05,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:05,956 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:05,956 INFO L506 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] [2021-02-19 18:49:06,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 18:49:06,170 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1633212671, now seen corresponding path program 12 times [2021-02-19 18:49:06,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:06,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950417023] [2021-02-19 18:49:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:06,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950417023] [2021-02-19 18:49:06,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577984505] [2021-02-19 18:49:06,202 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 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 [2021-02-19 18:49:06,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:49:06,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:49:06,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:06,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:06,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:49:06,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123469350] [2021-02-19 18:49:06,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:49:06,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:06,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:49:06,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:49:06,259 INFO L87 Difference]: Start difference. First operand 1477 states and 5066 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-02-19 18:49:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:06,326 INFO L93 Difference]: Finished difference Result 1938 states and 6279 transitions. [2021-02-19 18:49:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:49:06,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 [2021-02-19 18:49:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:06,334 INFO L225 Difference]: With dead ends: 1938 [2021-02-19 18:49:06,335 INFO L226 Difference]: Without dead ends: 1922 [2021-02-19 18:49:06,336 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:49:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-02-19 18:49:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1400. [2021-02-19 18:49:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.3924231593995713) internal successors, (4746), 1399 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) [2021-02-19 18:49:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4746 transitions. [2021-02-19 18:49:06,370 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4746 transitions. Word has length 24 [2021-02-19 18:49:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:06,371 INFO L480 AbstractCegarLoop]: Abstraction has 1400 states and 4746 transitions. [2021-02-19 18:49:06,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-02-19 18:49:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4746 transitions. [2021-02-19 18:49:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:06,391 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:06,391 INFO L506 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] [2021-02-19 18:49:06,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:06,591 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:06,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:06,592 INFO L82 PathProgramCache]: Analyzing trace with hash -833756313, now seen corresponding path program 13 times [2021-02-19 18:49:06,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:06,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001999571] [2021-02-19 18:49:06,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:06,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001999571] [2021-02-19 18:49:06,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119135760] [2021-02-19 18:49:06,613 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 [2021-02-19 18:49:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:06,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:49:06,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:06,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:06,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:49:06,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296796304] [2021-02-19 18:49:06,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:49:06,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:06,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:49:06,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:49:06,667 INFO L87 Difference]: Start difference. First operand 1400 states and 4746 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-02-19 18:49:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:06,742 INFO L93 Difference]: Finished difference Result 2961 states and 9894 transitions. [2021-02-19 18:49:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:49:06,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 [2021-02-19 18:49:06,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:06,766 INFO L225 Difference]: With dead ends: 2961 [2021-02-19 18:49:06,766 INFO L226 Difference]: Without dead ends: 2952 [2021-02-19 18:49:06,766 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:49:06,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2021-02-19 18:49:06,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2033. [2021-02-19 18:49:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.534448818897638) internal successors, (7182), 2032 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7182 transitions. [2021-02-19 18:49:06,829 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7182 transitions. Word has length 24 [2021-02-19 18:49:06,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:06,829 INFO L480 AbstractCegarLoop]: Abstraction has 2033 states and 7182 transitions. [2021-02-19 18:49:06,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-02-19 18:49:06,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7182 transitions. [2021-02-19 18:49:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:06,833 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:06,833 INFO L506 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] [2021-02-19 18:49:07,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 18:49:07,049 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash 756114063, now seen corresponding path program 14 times [2021-02-19 18:49:07,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:07,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504573252] [2021-02-19 18:49:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:07,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504573252] [2021-02-19 18:49:07,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112024620] [2021-02-19 18:49:07,071 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 [2021-02-19 18:49:07,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:49:07,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:07,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:49:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:07,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:07,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:49:07,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295479410] [2021-02-19 18:49:07,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:49:07,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:07,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:49:07,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:49:07,132 INFO L87 Difference]: Start difference. First operand 2033 states and 7182 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-02-19 18:49:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:07,193 INFO L93 Difference]: Finished difference Result 3041 states and 10107 transitions. [2021-02-19 18:49:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:49:07,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 [2021-02-19 18:49:07,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:07,201 INFO L225 Difference]: With dead ends: 3041 [2021-02-19 18:49:07,202 INFO L226 Difference]: Without dead ends: 3041 [2021-02-19 18:49:07,202 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:49:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-02-19 18:49:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2012. [2021-02-19 18:49:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 3.52710094480358) internal successors, (7093), 2011 states have internal predecessors, (7093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:07,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 7093 transitions. [2021-02-19 18:49:07,258 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 7093 transitions. Word has length 24 [2021-02-19 18:49:07,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:07,259 INFO L480 AbstractCegarLoop]: Abstraction has 2012 states and 7093 transitions. [2021-02-19 18:49:07,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-02-19 18:49:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 7093 transitions. [2021-02-19 18:49:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:07,263 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:07,263 INFO L506 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] [2021-02-19 18:49:07,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:07,480 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:07,481 INFO L82 PathProgramCache]: Analyzing trace with hash 28956003, now seen corresponding path program 15 times [2021-02-19 18:49:07,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:07,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240328736] [2021-02-19 18:49:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:07,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240328736] [2021-02-19 18:49:07,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850816356] [2021-02-19 18:49:07,500 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 [2021-02-19 18:49:07,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:49:07,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:49:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:07,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:07,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:49:07,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520547470] [2021-02-19 18:49:07,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:49:07,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:07,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:49:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:49:07,594 INFO L87 Difference]: Start difference. First operand 2012 states and 7093 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2021-02-19 18:49:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:08,181 INFO L93 Difference]: Finished difference Result 9230 states and 29756 transitions. [2021-02-19 18:49:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:49:08,182 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 24 [2021-02-19 18:49:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:08,207 INFO L225 Difference]: With dead ends: 9230 [2021-02-19 18:49:08,208 INFO L226 Difference]: Without dead ends: 8962 [2021-02-19 18:49:08,208 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:49:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-02-19 18:49:08,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 4517. [2021-02-19 18:49:08,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4516 states have (on average 3.649468556244464) internal successors, (16481), 4516 states have internal predecessors, (16481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 16481 transitions. [2021-02-19 18:49:08,365 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 16481 transitions. Word has length 24 [2021-02-19 18:49:08,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:08,366 INFO L480 AbstractCegarLoop]: Abstraction has 4517 states and 16481 transitions. [2021-02-19 18:49:08,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2021-02-19 18:49:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 16481 transitions. [2021-02-19 18:49:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:08,375 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:08,375 INFO L506 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] [2021-02-19 18:49:08,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 18:49:08,590 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:08,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:08,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1193786743, now seen corresponding path program 16 times [2021-02-19 18:49:08,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:08,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419166129] [2021-02-19 18:49:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:08,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419166129] [2021-02-19 18:49:08,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918084911] [2021-02-19 18:49:08,613 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) [2021-02-19 18:49:08,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:49:08,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:08,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:49:08,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:49:08,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:08,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:49:08,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712100708] [2021-02-19 18:49:08,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:49:08,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:08,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:49:08,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:49:08,671 INFO L87 Difference]: Start difference. First operand 4517 states and 16481 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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) [2021-02-19 18:49:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:08,743 INFO L93 Difference]: Finished difference Result 5640 states and 19744 transitions. [2021-02-19 18:49:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:49:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 [2021-02-19 18:49:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:08,759 INFO L225 Difference]: With dead ends: 5640 [2021-02-19 18:49:08,759 INFO L226 Difference]: Without dead ends: 5614 [2021-02-19 18:49:08,759 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:49:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2021-02-19 18:49:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 4545. [2021-02-19 18:49:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 4544 states have (on average 3.642825704225352) internal successors, (16553), 4544 states have internal predecessors, (16553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 16553 transitions. [2021-02-19 18:49:08,923 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 16553 transitions. Word has length 24 [2021-02-19 18:49:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:08,923 INFO L480 AbstractCegarLoop]: Abstraction has 4545 states and 16553 transitions. [2021-02-19 18:49:08,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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) [2021-02-19 18:49:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 16553 transitions. [2021-02-19 18:49:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:08,932 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:08,932 INFO L506 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] [2021-02-19 18:49:09,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 18:49:09,148 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1341889891, now seen corresponding path program 17 times [2021-02-19 18:49:09,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:09,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015670598] [2021-02-19 18:49:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:09,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015670598] [2021-02-19 18:49:09,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819350790] [2021-02-19 18:49:09,170 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 [2021-02-19 18:49:09,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:49:09,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:09,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:49:09,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:09,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:09,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-02-19 18:49:09,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637191719] [2021-02-19 18:49:09,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:49:09,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:09,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:49:09,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:49:09,238 INFO L87 Difference]: Start difference. First operand 4545 states and 16553 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-02-19 18:49:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:09,453 INFO L93 Difference]: Finished difference Result 6419 states and 21871 transitions. [2021-02-19 18:49:09,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:49:09,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 24 [2021-02-19 18:49:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:09,470 INFO L225 Difference]: With dead ends: 6419 [2021-02-19 18:49:09,471 INFO L226 Difference]: Without dead ends: 6345 [2021-02-19 18:49:09,471 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:49:09,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6345 states. [2021-02-19 18:49:09,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6345 to 4523. [2021-02-19 18:49:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 4522 states have (on average 3.645731977001327) internal successors, (16486), 4522 states have internal predecessors, (16486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:09,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 16486 transitions. [2021-02-19 18:49:09,579 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 16486 transitions. Word has length 24 [2021-02-19 18:49:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:09,579 INFO L480 AbstractCegarLoop]: Abstraction has 4523 states and 16486 transitions. [2021-02-19 18:49:09,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-02-19 18:49:09,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 16486 transitions. [2021-02-19 18:49:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:09,588 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:09,588 INFO L506 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] [2021-02-19 18:49:09,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 18:49:09,803 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:09,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:09,803 INFO L82 PathProgramCache]: Analyzing trace with hash -379513383, now seen corresponding path program 18 times [2021-02-19 18:49:09,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:09,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834820394] [2021-02-19 18:49:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:09,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834820394] [2021-02-19 18:49:09,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049715676] [2021-02-19 18:49:09,824 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 [2021-02-19 18:49:09,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 18:49:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:09,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:49:09,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:09,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:09,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:49:09,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276558567] [2021-02-19 18:49:09,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:49:09,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:09,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:49:09,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:49:09,878 INFO L87 Difference]: Start difference. First operand 4523 states and 16486 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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) [2021-02-19 18:49:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:09,960 INFO L93 Difference]: Finished difference Result 5931 states and 21351 transitions. [2021-02-19 18:49:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:49:09,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 [2021-02-19 18:49:09,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:09,975 INFO L225 Difference]: With dead ends: 5931 [2021-02-19 18:49:09,975 INFO L226 Difference]: Without dead ends: 5906 [2021-02-19 18:49:09,975 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:49:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5906 states. [2021-02-19 18:49:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5906 to 5352. [2021-02-19 18:49:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.690712016445524) internal successors, (19749), 5351 states have internal predecessors, (19749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 19749 transitions. [2021-02-19 18:49:10,116 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 19749 transitions. Word has length 24 [2021-02-19 18:49:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:10,116 INFO L480 AbstractCegarLoop]: Abstraction has 5352 states and 19749 transitions. [2021-02-19 18:49:10,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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) [2021-02-19 18:49:10,116 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 19749 transitions. [2021-02-19 18:49:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:10,126 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:10,126 INFO L506 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] [2021-02-19 18:49:10,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 18:49:10,342 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:10,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:10,342 INFO L82 PathProgramCache]: Analyzing trace with hash 822798985, now seen corresponding path program 19 times [2021-02-19 18:49:10,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:10,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019716604] [2021-02-19 18:49:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:10,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019716604] [2021-02-19 18:49:10,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075963106] [2021-02-19 18:49:10,369 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 [2021-02-19 18:49:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:10,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:49:10,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:49:10,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:10,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:49:10,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32350969] [2021-02-19 18:49:10,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:49:10,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:10,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:49:10,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:49:10,433 INFO L87 Difference]: Start difference. First operand 5352 states and 19749 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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) [2021-02-19 18:49:10,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:10,517 INFO L93 Difference]: Finished difference Result 6187 states and 22242 transitions. [2021-02-19 18:49:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:49:10,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 [2021-02-19 18:49:10,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:10,533 INFO L225 Difference]: With dead ends: 6187 [2021-02-19 18:49:10,533 INFO L226 Difference]: Without dead ends: 6177 [2021-02-19 18:49:10,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:49:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6177 states. [2021-02-19 18:49:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6177 to 5419. [2021-02-19 18:49:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5418 states have (on average 3.6864156515319304) internal successors, (19973), 5418 states have internal predecessors, (19973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:10,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 19973 transitions. [2021-02-19 18:49:10,643 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 19973 transitions. Word has length 24 [2021-02-19 18:49:10,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:10,643 INFO L480 AbstractCegarLoop]: Abstraction has 5419 states and 19973 transitions. [2021-02-19 18:49:10,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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) [2021-02-19 18:49:10,644 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 19973 transitions. [2021-02-19 18:49:10,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:10,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:10,653 INFO L506 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] [2021-02-19 18:49:10,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 18:49:10,866 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:10,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:10,866 INFO L82 PathProgramCache]: Analyzing trace with hash -450134723, now seen corresponding path program 20 times [2021-02-19 18:49:10,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:10,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727820777] [2021-02-19 18:49:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:10,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727820777] [2021-02-19 18:49:10,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679337491] [2021-02-19 18:49:10,886 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 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 [2021-02-19 18:49:10,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:49:10,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:10,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:49:10,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:10,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:10,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-02-19 18:49:10,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564907792] [2021-02-19 18:49:10,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:49:10,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:10,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:49:10,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:49:10,964 INFO L87 Difference]: Start difference. First operand 5419 states and 19973 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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) [2021-02-19 18:49:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:11,429 INFO L93 Difference]: Finished difference Result 7179 states and 25144 transitions. [2021-02-19 18:49:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:49:11,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 [2021-02-19 18:49:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:11,443 INFO L225 Difference]: With dead ends: 7179 [2021-02-19 18:49:11,443 INFO L226 Difference]: Without dead ends: 7111 [2021-02-19 18:49:11,444 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:49:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2021-02-19 18:49:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 5518. [2021-02-19 18:49:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5518 states, 5517 states have (on average 3.6699293094072867) internal successors, (20247), 5517 states have internal predecessors, (20247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5518 states to 5518 states and 20247 transitions. [2021-02-19 18:49:11,555 INFO L78 Accepts]: Start accepts. Automaton has 5518 states and 20247 transitions. Word has length 24 [2021-02-19 18:49:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:11,556 INFO L480 AbstractCegarLoop]: Abstraction has 5518 states and 20247 transitions. [2021-02-19 18:49:11,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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) [2021-02-19 18:49:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 5518 states and 20247 transitions. [2021-02-19 18:49:11,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:11,566 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:11,566 INFO L506 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] [2021-02-19 18:49:11,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:11,781 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:11,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:11,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1851263975, now seen corresponding path program 21 times [2021-02-19 18:49:11,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:11,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643636744] [2021-02-19 18:49:11,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:11,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643636744] [2021-02-19 18:49:11,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182382932] [2021-02-19 18:49:11,810 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 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 [2021-02-19 18:49:11,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:49:11,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:11,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:49:11,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:49:11,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:11,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-02-19 18:49:11,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741927619] [2021-02-19 18:49:11,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:49:11,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:11,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:49:11,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:49:11,888 INFO L87 Difference]: Start difference. First operand 5518 states and 20247 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-02-19 18:49:12,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:12,341 INFO L93 Difference]: Finished difference Result 11751 states and 40710 transitions. [2021-02-19 18:49:12,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 18:49:12,341 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 24 [2021-02-19 18:49:12,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:12,367 INFO L225 Difference]: With dead ends: 11751 [2021-02-19 18:49:12,367 INFO L226 Difference]: Without dead ends: 11587 [2021-02-19 18:49:12,368 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:49:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11587 states. [2021-02-19 18:49:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11587 to 8418. [2021-02-19 18:49:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 3.7303077105857194) internal successors, (31398), 8417 states have internal predecessors, (31398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31398 transitions. [2021-02-19 18:49:12,616 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31398 transitions. Word has length 24 [2021-02-19 18:49:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:12,616 INFO L480 AbstractCegarLoop]: Abstraction has 8418 states and 31398 transitions. [2021-02-19 18:49:12,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-02-19 18:49:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31398 transitions. [2021-02-19 18:49:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:49:12,633 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:12,633 INFO L506 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] [2021-02-19 18:49:12,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 18:49:12,847 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:12,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:12,848 INFO L82 PathProgramCache]: Analyzing trace with hash -8815851, now seen corresponding path program 22 times [2021-02-19 18:49:12,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:12,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956754601] [2021-02-19 18:49:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:12,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956754601] [2021-02-19 18:49:12,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597932060] [2021-02-19 18:49:12,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:49:12,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:49:12,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:12,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:49:12,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:12,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:12,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-02-19 18:49:12,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903739086] [2021-02-19 18:49:12,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:49:12,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:12,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:49:12,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:49:12,946 INFO L87 Difference]: Start difference. First operand 8418 states and 31398 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 18:49:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:13,087 INFO L93 Difference]: Finished difference Result 9470 states and 34319 transitions. [2021-02-19 18:49:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:49:13,087 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 [2021-02-19 18:49:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:13,108 INFO L225 Difference]: With dead ends: 9470 [2021-02-19 18:49:13,108 INFO L226 Difference]: Without dead ends: 9392 [2021-02-19 18:49:13,108 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:49:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9392 states. [2021-02-19 18:49:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9392 to 8499. [2021-02-19 18:49:13,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8499 states, 8498 states have (on average 3.7232289950576605) internal successors, (31640), 8498 states have internal predecessors, (31640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8499 states to 8499 states and 31640 transitions. [2021-02-19 18:49:13,276 INFO L78 Accepts]: Start accepts. Automaton has 8499 states and 31640 transitions. Word has length 24 [2021-02-19 18:49:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:13,276 INFO L480 AbstractCegarLoop]: Abstraction has 8499 states and 31640 transitions. [2021-02-19 18:49:13,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 18:49:13,277 INFO L276 IsEmpty]: Start isEmpty. Operand 8499 states and 31640 transitions. [2021-02-19 18:49:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:13,350 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:13,350 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:13,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:13,566 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:13,566 INFO L82 PathProgramCache]: Analyzing trace with hash -30738141, now seen corresponding path program 23 times [2021-02-19 18:49:13,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:13,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036373993] [2021-02-19 18:49:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:13,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036373993] [2021-02-19 18:49:13,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259431832] [2021-02-19 18:49:13,862 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 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 [2021-02-19 18:49:13,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:49:13,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:13,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:13,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:14,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:14,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:14,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:14,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:14,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:67 [2021-02-19 18:49:14,185 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_19], 2=[A]} [2021-02-19 18:49:14,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:49:14,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:14,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:14,197 INFO L518 ElimStorePlain]: Eliminatee v_C_19 vanished before elimination [2021-02-19 18:49:14,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:14,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:14,202 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 29 treesize of output 17 [2021-02-19 18:49:14,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:14,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:14,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:14,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:49:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:14,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:14,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:49:14,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779807145] [2021-02-19 18:49:14,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:49:14,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:14,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:49:14,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:49:14,235 INFO L87 Difference]: Start difference. First operand 8499 states and 31640 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:14,834 INFO L93 Difference]: Finished difference Result 11583 states and 42036 transitions. [2021-02-19 18:49:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:49:14,834 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-02-19 18:49:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:14,862 INFO L225 Difference]: With dead ends: 11583 [2021-02-19 18:49:14,862 INFO L226 Difference]: Without dead ends: 11568 [2021-02-19 18:49:14,862 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:49:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11568 states. [2021-02-19 18:49:15,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11568 to 8601. [2021-02-19 18:49:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8601 states, 8600 states have (on average 3.716860465116279) internal successors, (31965), 8600 states have internal predecessors, (31965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8601 states to 8601 states and 31965 transitions. [2021-02-19 18:49:15,055 INFO L78 Accepts]: Start accepts. Automaton has 8601 states and 31965 transitions. Word has length 28 [2021-02-19 18:49:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:15,055 INFO L480 AbstractCegarLoop]: Abstraction has 8601 states and 31965 transitions. [2021-02-19 18:49:15,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 8601 states and 31965 transitions. [2021-02-19 18:49:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:15,075 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:15,075 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:15,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 18:49:15,290 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash 593920867, now seen corresponding path program 24 times [2021-02-19 18:49:15,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:15,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130409704] [2021-02-19 18:49:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:15,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130409704] [2021-02-19 18:49:15,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383298009] [2021-02-19 18:49:15,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:49:15,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:49:15,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:15,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:15,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:15,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:15,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:15,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:15,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:15,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-02-19 18:49:15,839 INFO L446 ElimStorePlain]: Different costs {0=[v_C_21, B], 2=[A]} [2021-02-19 18:49:15,842 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 24 treesize of output 20 [2021-02-19 18:49:15,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:15,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:15,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-02-19 18:49:15,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:15,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:15,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:15,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:15,866 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 29 treesize of output 17 [2021-02-19 18:49:15,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:15,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:15,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:15,873 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:49:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:15,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:15,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:49:15,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826351481] [2021-02-19 18:49:15,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:49:15,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:15,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:49:15,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:49:15,892 INFO L87 Difference]: Start difference. First operand 8601 states and 31965 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:16,410 INFO L93 Difference]: Finished difference Result 11653 states and 42250 transitions. [2021-02-19 18:49:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:49:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-02-19 18:49:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:16,435 INFO L225 Difference]: With dead ends: 11653 [2021-02-19 18:49:16,435 INFO L226 Difference]: Without dead ends: 11611 [2021-02-19 18:49:16,436 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:49:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11611 states. [2021-02-19 18:49:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11611 to 8620. [2021-02-19 18:49:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8620 states, 8619 states have (on average 3.716092354101404) internal successors, (32029), 8619 states have internal predecessors, (32029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:16,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8620 states to 8620 states and 32029 transitions. [2021-02-19 18:49:16,632 INFO L78 Accepts]: Start accepts. Automaton has 8620 states and 32029 transitions. Word has length 28 [2021-02-19 18:49:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:16,632 INFO L480 AbstractCegarLoop]: Abstraction has 8620 states and 32029 transitions. [2021-02-19 18:49:16,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:16,632 INFO L276 IsEmpty]: Start isEmpty. Operand 8620 states and 32029 transitions. [2021-02-19 18:49:16,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:16,647 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:16,647 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:16,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 18:49:16,847 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1434477149, now seen corresponding path program 25 times [2021-02-19 18:49:16,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:16,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794186414] [2021-02-19 18:49:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:17,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794186414] [2021-02-19 18:49:17,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773811031] [2021-02-19 18:49:17,077 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 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 [2021-02-19 18:49:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:17,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:17,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:17,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:17,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:17,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:17,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:17,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-02-19 18:49:17,278 INFO L446 ElimStorePlain]: Different costs {0=[v_C_23], 3=[A]} [2021-02-19 18:49:17,280 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 32 treesize of output 24 [2021-02-19 18:49:17,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:17,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:17,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:17,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:17,296 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 47 treesize of output 29 [2021-02-19 18:49:17,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:17,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:17,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:17,308 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:35 [2021-02-19 18:49:17,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:49:17,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:17,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:17,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:17,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:49:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:17,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:17,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:49:17,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878708643] [2021-02-19 18:49:17,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:49:17,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:17,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:49:17,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:49:17,366 INFO L87 Difference]: Start difference. First operand 8620 states and 32029 transitions. Second operand has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:49:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:18,040 INFO L93 Difference]: Finished difference Result 11729 states and 42507 transitions. [2021-02-19 18:49:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:49:18,041 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) 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 [2021-02-19 18:49:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:18,067 INFO L225 Difference]: With dead ends: 11729 [2021-02-19 18:49:18,067 INFO L226 Difference]: Without dead ends: 11714 [2021-02-19 18:49:18,070 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:49:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11714 states. [2021-02-19 18:49:18,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11714 to 8638. [2021-02-19 18:49:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8638 states, 8637 states have (on average 3.717031376635406) internal successors, (32104), 8637 states have internal predecessors, (32104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8638 states to 8638 states and 32104 transitions. [2021-02-19 18:49:18,262 INFO L78 Accepts]: Start accepts. Automaton has 8638 states and 32104 transitions. Word has length 28 [2021-02-19 18:49:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:18,263 INFO L480 AbstractCegarLoop]: Abstraction has 8638 states and 32104 transitions. [2021-02-19 18:49:18,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:49:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 8638 states and 32104 transitions. [2021-02-19 18:49:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:18,278 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:18,279 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:18,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 18:49:18,479 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:18,479 INFO L82 PathProgramCache]: Analyzing trace with hash 387982435, now seen corresponding path program 26 times [2021-02-19 18:49:18,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:18,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860142520] [2021-02-19 18:49:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:18,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860142520] [2021-02-19 18:49:18,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692316337] [2021-02-19 18:49:18,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:18,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:49:18,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:18,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:18,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:18,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:49:18,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:18,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:18,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:18,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:52 [2021-02-19 18:49:18,978 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_25], 2=[A]} [2021-02-19 18:49:18,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:49:18,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:18,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:18,989 INFO L518 ElimStorePlain]: Eliminatee v_C_25 vanished before elimination [2021-02-19 18:49:18,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:18,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:18,993 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 33 treesize of output 21 [2021-02-19 18:49:18,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:18,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:19,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:19,001 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:49:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:19,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:19,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:49:19,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644502405] [2021-02-19 18:49:19,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:49:19,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:19,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:49:19,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:49:19,025 INFO L87 Difference]: Start difference. First operand 8638 states and 32104 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:19,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:19,658 INFO L93 Difference]: Finished difference Result 11712 states and 42480 transitions. [2021-02-19 18:49:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:49:19,659 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-02-19 18:49:19,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:19,682 INFO L225 Difference]: With dead ends: 11712 [2021-02-19 18:49:19,682 INFO L226 Difference]: Without dead ends: 11697 [2021-02-19 18:49:19,683 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:49:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11697 states. [2021-02-19 18:49:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11697 to 8684. [2021-02-19 18:49:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8684 states, 8683 states have (on average 3.71542093746401) internal successors, (32261), 8683 states have internal predecessors, (32261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8684 states to 8684 states and 32261 transitions. [2021-02-19 18:49:19,856 INFO L78 Accepts]: Start accepts. Automaton has 8684 states and 32261 transitions. Word has length 28 [2021-02-19 18:49:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:19,856 INFO L480 AbstractCegarLoop]: Abstraction has 8684 states and 32261 transitions. [2021-02-19 18:49:19,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8684 states and 32261 transitions. [2021-02-19 18:49:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:19,873 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:19,873 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:20,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 18:49:20,089 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:20,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1640415581, now seen corresponding path program 27 times [2021-02-19 18:49:20,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:20,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846347297] [2021-02-19 18:49:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:20,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846347297] [2021-02-19 18:49:20,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412799740] [2021-02-19 18:49:20,322 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 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 [2021-02-19 18:49:20,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:49:20,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:20,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:49:20,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:20,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:49:20,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:20,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:20,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:20,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:40 [2021-02-19 18:49:20,619 INFO L446 ElimStorePlain]: Different costs {0=[v_C_27], 3=[A]} [2021-02-19 18:49:20,622 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 24 treesize of output 20 [2021-02-19 18:49:20,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:20,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:20,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:20,657 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 25 treesize of output 41 [2021-02-19 18:49:20,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:20,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:20,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:20,768 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:149 [2021-02-19 18:49:21,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:21,347 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 [2021-02-19 18:49:21,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:21,395 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-02-19 18:49:21,395 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 38 treesize of output 45 [2021-02-19 18:49:21,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:21,418 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-02-19 18:49:21,419 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 28 treesize of output 1 [2021-02-19 18:49:21,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:21,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:21,445 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 [2021-02-19 18:49:21,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:21,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:21,482 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 22 treesize of output 38 [2021-02-19 18:49:21,494 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:21,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:21,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:21,515 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 [2021-02-19 18:49:21,517 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:49:21,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:21,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:21,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:21,528 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 32 treesize of output 20 [2021-02-19 18:49:21,529 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:21,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 18:49:21,537 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:21,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 18:49:21,544 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:21,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:21,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-02-19 18:49:21,554 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:21,580 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-02-19 18:49:21,580 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 32 treesize of output 1 [2021-02-19 18:49:21,581 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:21,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 18:49:21,588 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:21,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:21,606 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 9 treesize of output 14 [2021-02-19 18:49:21,608 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:21,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 18:49:21,615 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:21,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:21,632 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 9 treesize of output 14 [2021-02-19 18:49:21,633 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:21,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:21,652 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 9 treesize of output 14 [2021-02-19 18:49:21,653 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:21,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:21,671 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 9 treesize of output 14 [2021-02-19 18:49:21,673 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:22,095 WARN L202 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2021-02-19 18:49:22,095 INFO L628 ElimStorePlain]: treesize reduction 209, result has 59.6 percent of original size [2021-02-19 18:49:22,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 18:49:22,157 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 3 variables, input treesize:739, output treesize:645 [2021-02-19 18:49:22,462 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 71 [2021-02-19 18:49:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:22,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:22,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-02-19 18:49:22,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412346431] [2021-02-19 18:49:22,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:49:22,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:22,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:49:22,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:49:22,651 INFO L87 Difference]: Start difference. First operand 8684 states and 32261 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-02-19 18:49:23,188 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2021-02-19 18:49:23,596 WARN L202 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2021-02-19 18:49:23,951 WARN L202 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2021-02-19 18:49:24,706 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 18:49:24,966 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-02-19 18:49:25,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:25,564 INFO L93 Difference]: Finished difference Result 11965 states and 43217 transitions. [2021-02-19 18:49:25,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:49:25,564 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 [2021-02-19 18:49:25,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:25,590 INFO L225 Difference]: With dead ends: 11965 [2021-02-19 18:49:25,590 INFO L226 Difference]: Without dead ends: 11887 [2021-02-19 18:49:25,590 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:49:25,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11887 states. [2021-02-19 18:49:25,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11887 to 8687. [2021-02-19 18:49:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8687 states, 8686 states have (on average 3.7159797375086345) internal successors, (32277), 8686 states have internal predecessors, (32277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 32277 transitions. [2021-02-19 18:49:25,761 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 32277 transitions. Word has length 28 [2021-02-19 18:49:25,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:25,762 INFO L480 AbstractCegarLoop]: Abstraction has 8687 states and 32277 transitions. [2021-02-19 18:49:25,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-02-19 18:49:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 32277 transitions. [2021-02-19 18:49:25,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:25,777 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:25,777 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:25,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 18:49:25,978 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:25,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:25,978 INFO L82 PathProgramCache]: Analyzing trace with hash -974708829, now seen corresponding path program 28 times [2021-02-19 18:49:25,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:25,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253590656] [2021-02-19 18:49:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:26,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253590656] [2021-02-19 18:49:26,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348789342] [2021-02-19 18:49:26,279 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 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 [2021-02-19 18:49:26,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:49:26,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:26,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:26,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:26,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:26,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:26,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:26,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:26,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:64 [2021-02-19 18:49:26,473 INFO L446 ElimStorePlain]: Different costs {0=[v_C_29], 3=[A]} [2021-02-19 18:49:26,476 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 28 treesize of output 24 [2021-02-19 18:49:26,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:26,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:26,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:26,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:26,494 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 43 treesize of output 29 [2021-02-19 18:49:26,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:26,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:26,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:26,507 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-02-19 18:49:26,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:49:26,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:26,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:26,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:26,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:49:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:26,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:26,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:49:26,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503690045] [2021-02-19 18:49:26,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:49:26,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:49:26,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:49:26,586 INFO L87 Difference]: Start difference. First operand 8687 states and 32277 transitions. Second operand has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:49:27,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:27,159 INFO L93 Difference]: Finished difference Result 11740 states and 42594 transitions. [2021-02-19 18:49:27,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:49:27,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) 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 [2021-02-19 18:49:27,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:27,185 INFO L225 Difference]: With dead ends: 11740 [2021-02-19 18:49:27,185 INFO L226 Difference]: Without dead ends: 11725 [2021-02-19 18:49:27,185 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:49:27,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11725 states. [2021-02-19 18:49:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11725 to 8719. [2021-02-19 18:49:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 8718 states have (on average 3.714269327827483) internal successors, (32381), 8718 states have internal predecessors, (32381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 32381 transitions. [2021-02-19 18:49:27,349 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 32381 transitions. Word has length 28 [2021-02-19 18:49:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:27,349 INFO L480 AbstractCegarLoop]: Abstraction has 8719 states and 32381 transitions. [2021-02-19 18:49:27,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:49:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 32381 transitions. [2021-02-19 18:49:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:27,366 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:27,366 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:27,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:27,570 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:27,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:27,570 INFO L82 PathProgramCache]: Analyzing trace with hash 111152035, now seen corresponding path program 29 times [2021-02-19 18:49:27,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:27,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256036773] [2021-02-19 18:49:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:27,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256036773] [2021-02-19 18:49:27,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814860384] [2021-02-19 18:49:27,783 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 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 [2021-02-19 18:49:27,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:49:27,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:27,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:27,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:49:27,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:27,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:27,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:27,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-02-19 18:49:28,042 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_31], 2=[A]} [2021-02-19 18:49:28,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:49:28,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:28,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:28,053 INFO L518 ElimStorePlain]: Eliminatee v_C_31 vanished before elimination [2021-02-19 18:49:28,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:28,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:28,057 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 29 treesize of output 17 [2021-02-19 18:49:28,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:28,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:28,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:28,065 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:49:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:28,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:28,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:49:28,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888850324] [2021-02-19 18:49:28,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:49:28,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:28,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:49:28,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:49:28,085 INFO L87 Difference]: Start difference. First operand 8719 states and 32381 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:28,897 INFO L93 Difference]: Finished difference Result 11783 states and 42686 transitions. [2021-02-19 18:49:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:49:28,898 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-02-19 18:49:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:28,919 INFO L225 Difference]: With dead ends: 11783 [2021-02-19 18:49:28,919 INFO L226 Difference]: Without dead ends: 11758 [2021-02-19 18:49:28,919 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:49:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11758 states. [2021-02-19 18:49:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11758 to 8765. [2021-02-19 18:49:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8765 states, 8764 states have (on average 3.7110908261068007) internal successors, (32524), 8764 states have internal predecessors, (32524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 32524 transitions. [2021-02-19 18:49:29,050 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 32524 transitions. Word has length 28 [2021-02-19 18:49:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:29,051 INFO L480 AbstractCegarLoop]: Abstraction has 8765 states and 32524 transitions. [2021-02-19 18:49:29,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 32524 transitions. [2021-02-19 18:49:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:29,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:29,063 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:29,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-02-19 18:49:29,278 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:29,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:29,278 INFO L82 PathProgramCache]: Analyzing trace with hash 735811043, now seen corresponding path program 30 times [2021-02-19 18:49:29,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:29,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131186766] [2021-02-19 18:49:29,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:29,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131186766] [2021-02-19 18:49:29,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050481092] [2021-02-19 18:49:29,488 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 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 [2021-02-19 18:49:29,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:49:29,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:29,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:29,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:29,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:29,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:29,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:29,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:29,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-02-19 18:49:29,745 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_33], 2=[A]} [2021-02-19 18:49:29,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:49:29,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:29,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:29,760 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 18 treesize of output 14 [2021-02-19 18:49:29,761 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:29,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:29,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:29,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:29,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-02-19 18:49:29,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:29,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:29,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:29,781 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:49:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:29,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:29,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:49:29,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324431926] [2021-02-19 18:49:29,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:49:29,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:29,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:49:29,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:49:29,801 INFO L87 Difference]: Start difference. First operand 8765 states and 32524 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:30,431 INFO L93 Difference]: Finished difference Result 11773 states and 42654 transitions. [2021-02-19 18:49:30,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:49:30,431 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-02-19 18:49:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:30,458 INFO L225 Difference]: With dead ends: 11773 [2021-02-19 18:49:30,458 INFO L226 Difference]: Without dead ends: 11710 [2021-02-19 18:49:30,458 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:49:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11710 states. [2021-02-19 18:49:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11710 to 8784. [2021-02-19 18:49:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8784 states, 8783 states have (on average 3.709552544688603) internal successors, (32581), 8783 states have internal predecessors, (32581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 32581 transitions. [2021-02-19 18:49:30,620 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 32581 transitions. Word has length 28 [2021-02-19 18:49:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:30,620 INFO L480 AbstractCegarLoop]: Abstraction has 8784 states and 32581 transitions. [2021-02-19 18:49:30,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 32581 transitions. [2021-02-19 18:49:30,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:30,635 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:30,635 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:30,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-02-19 18:49:30,836 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:30,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:30,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1292586973, now seen corresponding path program 31 times [2021-02-19 18:49:30,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:30,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787446256] [2021-02-19 18:49:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:31,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787446256] [2021-02-19 18:49:31,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454378915] [2021-02-19 18:49:31,103 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 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 [2021-02-19 18:49:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:31,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:31,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:31,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:31,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:31,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:31,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:31,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-02-19 18:49:31,310 INFO L446 ElimStorePlain]: Different costs {0=[v_C_35], 3=[A]} [2021-02-19 18:49:31,313 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 32 treesize of output 24 [2021-02-19 18:49:31,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:31,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:31,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:31,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:31,331 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 42 treesize of output 24 [2021-02-19 18:49:31,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:31,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:31,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:31,344 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:35 [2021-02-19 18:49:31,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:49:31,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:31,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:31,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:31,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:49:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:31,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:31,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:49:31,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842730206] [2021-02-19 18:49:31,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:49:31,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:31,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:49:31,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:49:31,394 INFO L87 Difference]: Start difference. First operand 8784 states and 32581 transitions. Second operand has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:49:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:32,239 INFO L93 Difference]: Finished difference Result 11864 states and 42950 transitions. [2021-02-19 18:49:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:49:32,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) 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 [2021-02-19 18:49:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:32,259 INFO L225 Difference]: With dead ends: 11864 [2021-02-19 18:49:32,259 INFO L226 Difference]: Without dead ends: 11839 [2021-02-19 18:49:32,259 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:49:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11839 states. [2021-02-19 18:49:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11839 to 8763. [2021-02-19 18:49:32,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8763 states, 8762 states have (on average 3.713421593243552) internal successors, (32537), 8762 states have internal predecessors, (32537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8763 states to 8763 states and 32537 transitions. [2021-02-19 18:49:32,385 INFO L78 Accepts]: Start accepts. Automaton has 8763 states and 32537 transitions. Word has length 28 [2021-02-19 18:49:32,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:32,386 INFO L480 AbstractCegarLoop]: Abstraction has 8763 states and 32537 transitions. [2021-02-19 18:49:32,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:49:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 8763 states and 32537 transitions. [2021-02-19 18:49:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:32,398 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:32,398 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:32,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-02-19 18:49:32,599 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:32,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:32,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1774731741, now seen corresponding path program 32 times [2021-02-19 18:49:32,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:32,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88231104] [2021-02-19 18:49:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:32,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88231104] [2021-02-19 18:49:32,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062281399] [2021-02-19 18:49:32,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:49:32,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:49:32,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:32,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:32,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:32,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:32,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:32,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:32,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:32,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-02-19 18:49:33,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:49:33,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:33,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:33,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 18:49:33,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:33,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:33,038 INFO L518 ElimStorePlain]: Eliminatee v_C_37 vanished before elimination [2021-02-19 18:49:33,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:33,038 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-02-19 18:49:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:33,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:33,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:49:33,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363322339] [2021-02-19 18:49:33,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:49:33,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:33,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:49:33,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:49:33,059 INFO L87 Difference]: Start difference. First operand 8763 states and 32537 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) [2021-02-19 18:49:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:33,802 INFO L93 Difference]: Finished difference Result 9105 states and 33542 transitions. [2021-02-19 18:49:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:49:33,806 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 28 [2021-02-19 18:49:33,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:33,826 INFO L225 Difference]: With dead ends: 9105 [2021-02-19 18:49:33,826 INFO L226 Difference]: Without dead ends: 9090 [2021-02-19 18:49:33,827 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:49:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9090 states. [2021-02-19 18:49:33,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9090 to 8789. [2021-02-19 18:49:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8789 states, 8788 states have (on average 3.7131315430132) internal successors, (32631), 8788 states have internal predecessors, (32631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8789 states to 8789 states and 32631 transitions. [2021-02-19 18:49:33,974 INFO L78 Accepts]: Start accepts. Automaton has 8789 states and 32631 transitions. Word has length 28 [2021-02-19 18:49:33,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:33,974 INFO L480 AbstractCegarLoop]: Abstraction has 8789 states and 32631 transitions. [2021-02-19 18:49:33,974 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) [2021-02-19 18:49:33,974 INFO L276 IsEmpty]: Start isEmpty. Operand 8789 states and 32631 transitions. [2021-02-19 18:49:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:33,990 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:33,990 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:34,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-02-19 18:49:34,191 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash -472037209, now seen corresponding path program 33 times [2021-02-19 18:49:34,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:34,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097384461] [2021-02-19 18:49:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:34,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097384461] [2021-02-19 18:49:34,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073250357] [2021-02-19 18:49:34,395 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 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 [2021-02-19 18:49:34,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:49:34,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:34,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:49:34,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:34,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:49:34,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:34,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:34,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:34,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-02-19 18:49:34,683 INFO L446 ElimStorePlain]: Different costs {0=[v_C_39], 2=[A, B]} [2021-02-19 18:49:34,687 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 24 treesize of output 20 [2021-02-19 18:49:34,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:34,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:34,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:34,717 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 33 [2021-02-19 18:49:34,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:34,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:34,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:34,756 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 61 treesize of output 61 [2021-02-19 18:49:34,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:34,817 INFO L628 ElimStorePlain]: treesize reduction 37, result has 52.6 percent of original size [2021-02-19 18:49:34,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:34,823 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:82 [2021-02-19 18:49:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:34,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:34,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-02-19 18:49:34,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151222652] [2021-02-19 18:49:34,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:49:34,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:34,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:49:34,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:49:34,901 INFO L87 Difference]: Start difference. First operand 8789 states and 32631 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:36,461 INFO L93 Difference]: Finished difference Result 11850 states and 42895 transitions. [2021-02-19 18:49:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:49:36,461 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:49:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:36,532 INFO L225 Difference]: With dead ends: 11850 [2021-02-19 18:49:36,532 INFO L226 Difference]: Without dead ends: 11767 [2021-02-19 18:49:36,533 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:49:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11767 states. [2021-02-19 18:49:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11767 to 8811. [2021-02-19 18:49:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 3.7122587968217933) internal successors, (32705), 8810 states have internal predecessors, (32705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 32705 transitions. [2021-02-19 18:49:36,722 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 32705 transitions. Word has length 28 [2021-02-19 18:49:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:36,722 INFO L480 AbstractCegarLoop]: Abstraction has 8811 states and 32705 transitions. [2021-02-19 18:49:36,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 32705 transitions. [2021-02-19 18:49:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:36,738 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:36,738 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:36,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:36,939 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:36,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:36,940 INFO L82 PathProgramCache]: Analyzing trace with hash 595837355, now seen corresponding path program 34 times [2021-02-19 18:49:36,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:36,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110412300] [2021-02-19 18:49:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:37,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110412300] [2021-02-19 18:49:37,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419525683] [2021-02-19 18:49:37,198 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 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 [2021-02-19 18:49:37,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:49:37,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:37,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:37,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:37,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:37,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:37,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:37,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:37,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-02-19 18:49:37,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:49:37,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:37,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:37,388 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 18 treesize of output 14 [2021-02-19 18:49:37,390 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:37,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:37,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:37,397 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-02-19 18:49:37,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:49:37,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:37,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:37,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:37,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:49:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:37,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:37,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:49:37,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240338504] [2021-02-19 18:49:37,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:49:37,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:37,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:49:37,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:49:37,449 INFO L87 Difference]: Start difference. First operand 8811 states and 32705 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-02-19 18:49:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:38,275 INFO L93 Difference]: Finished difference Result 11773 states and 42754 transitions. [2021-02-19 18:49:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:49:38,276 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-02-19 18:49:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:38,302 INFO L225 Difference]: With dead ends: 11773 [2021-02-19 18:49:38,302 INFO L226 Difference]: Without dead ends: 11758 [2021-02-19 18:49:38,303 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:49:38,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11758 states. [2021-02-19 18:49:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11758 to 8839. [2021-02-19 18:49:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8839 states, 8838 states have (on average 3.7121520706042093) internal successors, (32808), 8838 states have internal predecessors, (32808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8839 states to 8839 states and 32808 transitions. [2021-02-19 18:49:38,469 INFO L78 Accepts]: Start accepts. Automaton has 8839 states and 32808 transitions. Word has length 28 [2021-02-19 18:49:38,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:38,469 INFO L480 AbstractCegarLoop]: Abstraction has 8839 states and 32808 transitions. [2021-02-19 18:49:38,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-02-19 18:49:38,469 INFO L276 IsEmpty]: Start isEmpty. Operand 8839 states and 32808 transitions. [2021-02-19 18:49:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:38,484 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:38,484 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:38,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-02-19 18:49:38,690 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:38,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:38,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1716487879, now seen corresponding path program 35 times [2021-02-19 18:49:38,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:38,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807436916] [2021-02-19 18:49:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:38,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807436916] [2021-02-19 18:49:38,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267982157] [2021-02-19 18:49:38,943 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 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 [2021-02-19 18:49:38,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:49:38,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:38,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:39,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:39,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:39,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:39,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:39,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-02-19 18:49:39,171 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_43], 2=[A]} [2021-02-19 18:49:39,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:49:39,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:39,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:39,181 INFO L518 ElimStorePlain]: Eliminatee v_C_43 vanished before elimination [2021-02-19 18:49:39,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:39,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:39,184 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 33 treesize of output 21 [2021-02-19 18:49:39,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:39,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:39,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:39,191 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:49:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:39,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:39,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:49:39,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575350551] [2021-02-19 18:49:39,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:49:39,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:39,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:49:39,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:49:39,209 INFO L87 Difference]: Start difference. First operand 8839 states and 32808 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:39,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:39,799 INFO L93 Difference]: Finished difference Result 11850 states and 42962 transitions. [2021-02-19 18:49:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:49:39,800 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-02-19 18:49:39,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:39,826 INFO L225 Difference]: With dead ends: 11850 [2021-02-19 18:49:39,826 INFO L226 Difference]: Without dead ends: 11787 [2021-02-19 18:49:39,826 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:49:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11787 states. [2021-02-19 18:49:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11787 to 8865. [2021-02-19 18:49:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8865 states, 8864 states have (on average 3.7093862815884475) internal successors, (32880), 8864 states have internal predecessors, (32880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8865 states to 8865 states and 32880 transitions. [2021-02-19 18:49:39,991 INFO L78 Accepts]: Start accepts. Automaton has 8865 states and 32880 transitions. Word has length 28 [2021-02-19 18:49:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:39,992 INFO L480 AbstractCegarLoop]: Abstraction has 8865 states and 32880 transitions. [2021-02-19 18:49:39,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 8865 states and 32880 transitions. [2021-02-19 18:49:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:40,007 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:40,007 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:40,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:40,208 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:40,208 INFO L82 PathProgramCache]: Analyzing trace with hash -311910137, now seen corresponding path program 36 times [2021-02-19 18:49:40,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:40,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562973995] [2021-02-19 18:49:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:40,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562973995] [2021-02-19 18:49:40,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596243123] [2021-02-19 18:49:40,480 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:49:40,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:49:40,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:40,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:40,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:40,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:40,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:40,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:40,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:40,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-02-19 18:49:40,690 INFO L446 ElimStorePlain]: Different costs {0=[v_C_45], 3=[A]} [2021-02-19 18:49:40,693 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 32 treesize of output 24 [2021-02-19 18:49:40,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:40,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:40,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:40,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:40,711 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 47 treesize of output 29 [2021-02-19 18:49:40,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:40,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:40,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:40,723 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:35 [2021-02-19 18:49:40,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:49:40,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:40,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:40,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:40,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:49:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:40,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:40,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:49:40,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115704208] [2021-02-19 18:49:40,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:49:40,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:40,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:49:40,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:49:40,778 INFO L87 Difference]: Start difference. First operand 8865 states and 32880 transitions. Second operand has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:49:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:41,408 INFO L93 Difference]: Finished difference Result 11944 states and 43225 transitions. [2021-02-19 18:49:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:49:41,409 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) 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 [2021-02-19 18:49:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:41,436 INFO L225 Difference]: With dead ends: 11944 [2021-02-19 18:49:41,436 INFO L226 Difference]: Without dead ends: 11905 [2021-02-19 18:49:41,436 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:49:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11905 states. [2021-02-19 18:49:41,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11905 to 8872. [2021-02-19 18:49:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8872 states, 8871 states have (on average 3.708826513358133) internal successors, (32901), 8871 states have internal predecessors, (32901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8872 states to 8872 states and 32901 transitions. [2021-02-19 18:49:41,605 INFO L78 Accepts]: Start accepts. Automaton has 8872 states and 32901 transitions. Word has length 28 [2021-02-19 18:49:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:41,605 INFO L480 AbstractCegarLoop]: Abstraction has 8872 states and 32901 transitions. [2021-02-19 18:49:41,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:49:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 8872 states and 32901 transitions. [2021-02-19 18:49:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:41,622 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:41,622 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:41,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:41,822 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:41,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:41,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1508154595, now seen corresponding path program 37 times [2021-02-19 18:49:41,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:41,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141603827] [2021-02-19 18:49:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:42,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141603827] [2021-02-19 18:49:42,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703818881] [2021-02-19 18:49:42,098 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 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 [2021-02-19 18:49:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:42,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:42,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:42,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:49:42,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:42,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:42,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:42,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:49:42,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:49:42,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:42,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:42,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-02-19 18:49:42,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:42,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:42,312 INFO L518 ElimStorePlain]: Eliminatee v_C_47 vanished before elimination [2021-02-19 18:49:42,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:42,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-02-19 18:49:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:42,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:42,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:49:42,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93760272] [2021-02-19 18:49:42,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:49:42,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:42,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:49:42,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:49:42,330 INFO L87 Difference]: Start difference. First operand 8872 states and 32901 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) [2021-02-19 18:49:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:43,115 INFO L93 Difference]: Finished difference Result 13042 states and 46993 transitions. [2021-02-19 18:49:43,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:49:43,117 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 28 [2021-02-19 18:49:43,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:43,149 INFO L225 Difference]: With dead ends: 13042 [2021-02-19 18:49:43,149 INFO L226 Difference]: Without dead ends: 12979 [2021-02-19 18:49:43,150 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:49:43,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12979 states. [2021-02-19 18:49:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12979 to 8887. [2021-02-19 18:49:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8887 states, 8886 states have (on average 3.70717983344587) internal successors, (32942), 8886 states have internal predecessors, (32942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8887 states to 8887 states and 32942 transitions. [2021-02-19 18:49:43,332 INFO L78 Accepts]: Start accepts. Automaton has 8887 states and 32942 transitions. Word has length 28 [2021-02-19 18:49:43,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:43,332 INFO L480 AbstractCegarLoop]: Abstraction has 8887 states and 32942 transitions. [2021-02-19 18:49:43,332 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) [2021-02-19 18:49:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand 8887 states and 32942 transitions. [2021-02-19 18:49:43,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:43,348 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:43,348 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:43,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:43,548 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:43,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1639118951, now seen corresponding path program 38 times [2021-02-19 18:49:43,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:43,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250269148] [2021-02-19 18:49:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:43,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250269148] [2021-02-19 18:49:43,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318583452] [2021-02-19 18:49:43,818 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:43,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:49:43,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:43,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:43,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:43,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:43,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:43,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:43,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:43,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:49:43,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:49:43,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:43,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:43,980 INFO L518 ElimStorePlain]: Eliminatee v_C_49 vanished before elimination [2021-02-19 18:49:43,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:43,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-02-19 18:49:44,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:49:44,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:44,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:44,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:44,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:49:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:44,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:44,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:49:44,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54899558] [2021-02-19 18:49:44,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:49:44,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:44,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:49:44,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:49:44,033 INFO L87 Difference]: Start difference. First operand 8887 states and 32942 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-02-19 18:49:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:44,857 INFO L93 Difference]: Finished difference Result 11822 states and 42875 transitions. [2021-02-19 18:49:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:49:44,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-02-19 18:49:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:44,883 INFO L225 Difference]: With dead ends: 11822 [2021-02-19 18:49:44,883 INFO L226 Difference]: Without dead ends: 11794 [2021-02-19 18:49:44,884 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:49:44,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11794 states. [2021-02-19 18:49:45,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11794 to 8890. [2021-02-19 18:49:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8890 states, 8889 states have (on average 3.7077286533918326) internal successors, (32958), 8889 states have internal predecessors, (32958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8890 states to 8890 states and 32958 transitions. [2021-02-19 18:49:45,043 INFO L78 Accepts]: Start accepts. Automaton has 8890 states and 32958 transitions. Word has length 28 [2021-02-19 18:49:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:45,043 INFO L480 AbstractCegarLoop]: Abstraction has 8890 states and 32958 transitions. [2021-02-19 18:49:45,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-02-19 18:49:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 8890 states and 32958 transitions. [2021-02-19 18:49:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:45,058 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:45,058 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:45,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:45,259 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:45,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1105084039, now seen corresponding path program 39 times [2021-02-19 18:49:45,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:45,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845741185] [2021-02-19 18:49:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:45,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845741185] [2021-02-19 18:49:45,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931219187] [2021-02-19 18:49:45,493 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 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 [2021-02-19 18:49:45,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:49:45,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:45,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:49:45,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:45,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:49:45,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:45,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:45,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:45,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-02-19 18:49:45,699 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 24 treesize of output 20 [2021-02-19 18:49:45,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:45,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:45,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:45,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:40 [2021-02-19 18:49:45,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:45,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-02-19 18:49:45,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:45,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:45,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:49:45,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:198 [2021-02-19 18:49:46,457 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-02-19 18:49:46,658 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_14, v_prenex_16, v_prenex_7, v_prenex_15], 3=[v_prenex_8, B, v_prenex_10, v_prenex_12]} [2021-02-19 18:49:46,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:46,673 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 9 treesize of output 14 [2021-02-19 18:49:46,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:46,865 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2021-02-19 18:49:46,866 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.6 percent of original size [2021-02-19 18:49:46,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:46,879 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 9 treesize of output 14 [2021-02-19 18:49:46,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:46,989 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-02-19 18:49:46,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:47,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:47,004 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 9 treesize of output 14 [2021-02-19 18:49:47,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:47,123 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-02-19 18:49:47,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:47,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:47,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-02-19 18:49:47,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:47,248 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 18:49:47,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:47,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:47,276 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 [2021-02-19 18:49:47,279 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:47,404 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 18:49:47,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:47,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:47,430 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 37 treesize of output 49 [2021-02-19 18:49:47,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:47,593 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-02-19 18:49:47,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:47,623 INFO L354 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2021-02-19 18:49:47,623 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 22 treesize of output 25 [2021-02-19 18:49:47,625 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:47,770 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-02-19 18:49:47,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:47,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:47,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:47,785 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 [2021-02-19 18:49:47,787 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:49:47,931 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 18:49:47,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:47,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 18:49:47,991 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 13 variables, input treesize:290, output treesize:865 [2021-02-19 18:49:48,475 WARN L202 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 74 [2021-02-19 18:49:48,644 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 18:49:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:48,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:48,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-02-19 18:49:48,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418713351] [2021-02-19 18:49:48,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:49:48,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:48,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:49:48,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:49:48,700 INFO L87 Difference]: Start difference. First operand 8890 states and 32958 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-02-19 18:49:49,147 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-02-19 18:49:49,592 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 18:49:50,174 WARN L202 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 116 [2021-02-19 18:49:50,498 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 43 [2021-02-19 18:49:51,153 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2021-02-19 18:49:51,672 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-02-19 18:49:51,904 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 33 [2021-02-19 18:49:52,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:52,009 INFO L93 Difference]: Finished difference Result 9194 states and 33804 transitions. [2021-02-19 18:49:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:49:52,009 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 [2021-02-19 18:49:52,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:52,030 INFO L225 Difference]: With dead ends: 9194 [2021-02-19 18:49:52,030 INFO L226 Difference]: Without dead ends: 9154 [2021-02-19 18:49:52,031 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:49:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9154 states. [2021-02-19 18:49:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9154 to 8909. [2021-02-19 18:49:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8909 states, 8908 states have (on average 3.7074539739559946) internal successors, (33026), 8908 states have internal predecessors, (33026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8909 states to 8909 states and 33026 transitions. [2021-02-19 18:49:52,183 INFO L78 Accepts]: Start accepts. Automaton has 8909 states and 33026 transitions. Word has length 28 [2021-02-19 18:49:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:52,183 INFO L480 AbstractCegarLoop]: Abstraction has 8909 states and 33026 transitions. [2021-02-19 18:49:52,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-02-19 18:49:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 8909 states and 33026 transitions. [2021-02-19 18:49:52,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:52,200 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:52,200 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:52,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-02-19 18:49:52,400 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:52,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2092575651, now seen corresponding path program 40 times [2021-02-19 18:49:52,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:52,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777637865] [2021-02-19 18:49:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:52,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777637865] [2021-02-19 18:49:52,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503205656] [2021-02-19 18:49:52,669 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 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 [2021-02-19 18:49:52,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:49:52,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:52,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:52,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:52,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:52,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:52,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:52,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:52,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-02-19 18:49:52,825 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 32 treesize of output 24 [2021-02-19 18:49:52,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:52,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:52,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:52,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:54 [2021-02-19 18:49:52,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 18:49:52,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:52,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:52,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:52,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-02-19 18:49:52,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:49:52,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:52,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:52,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:52,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:49:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:52,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:52,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:49:52,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794706300] [2021-02-19 18:49:52,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:49:52,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:52,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:49:52,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:49:52,934 INFO L87 Difference]: Start difference. First operand 8909 states and 33026 transitions. Second operand has 16 states, 16 states have (on average 2.6875) 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) [2021-02-19 18:49:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:53,546 INFO L93 Difference]: Finished difference Result 9049 states and 33440 transitions. [2021-02-19 18:49:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:49:53,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) 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 [2021-02-19 18:49:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:53,567 INFO L225 Difference]: With dead ends: 9049 [2021-02-19 18:49:53,568 INFO L226 Difference]: Without dead ends: 9034 [2021-02-19 18:49:53,568 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:49:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9034 states. [2021-02-19 18:49:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9034 to 8928. [2021-02-19 18:49:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8928 states, 8927 states have (on average 3.706956424330682) internal successors, (33092), 8927 states have internal predecessors, (33092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8928 states to 8928 states and 33092 transitions. [2021-02-19 18:49:53,709 INFO L78 Accepts]: Start accepts. Automaton has 8928 states and 33092 transitions. Word has length 28 [2021-02-19 18:49:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:53,709 INFO L480 AbstractCegarLoop]: Abstraction has 8928 states and 33092 transitions. [2021-02-19 18:49:53,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) 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) [2021-02-19 18:49:53,709 INFO L276 IsEmpty]: Start isEmpty. Operand 8928 states and 33092 transitions. [2021-02-19 18:49:53,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:53,780 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:53,780 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:53,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:49:53,980 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:53,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2074383289, now seen corresponding path program 41 times [2021-02-19 18:49:53,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:53,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931171624] [2021-02-19 18:49:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:54,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931171624] [2021-02-19 18:49:54,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289087471] [2021-02-19 18:49:54,222 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 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 [2021-02-19 18:49:54,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:49:54,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:54,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:54,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:54,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:49:54,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:54,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:54,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:54,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:49:54,490 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_55], 2=[A]} [2021-02-19 18:49:54,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:49:54,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:54,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:54,504 INFO L518 ElimStorePlain]: Eliminatee v_C_55 vanished before elimination [2021-02-19 18:49:54,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:54,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:54,508 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 33 treesize of output 21 [2021-02-19 18:49:54,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:54,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:54,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:54,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:49:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:54,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:54,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:49:54,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156346405] [2021-02-19 18:49:54,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:49:54,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:54,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:49:54,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:49:54,542 INFO L87 Difference]: Start difference. First operand 8928 states and 33092 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:55,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:55,420 INFO L93 Difference]: Finished difference Result 12009 states and 43453 transitions. [2021-02-19 18:49:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:49:55,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-02-19 18:49:55,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:55,448 INFO L225 Difference]: With dead ends: 12009 [2021-02-19 18:49:55,448 INFO L226 Difference]: Without dead ends: 11969 [2021-02-19 18:49:55,448 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:49:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11969 states. [2021-02-19 18:49:55,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11969 to 8969. [2021-02-19 18:49:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8968 states have (on average 3.704504906333631) internal successors, (33222), 8968 states have internal predecessors, (33222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 33222 transitions. [2021-02-19 18:49:55,617 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 33222 transitions. Word has length 28 [2021-02-19 18:49:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:55,617 INFO L480 AbstractCegarLoop]: Abstraction has 8969 states and 33222 transitions. [2021-02-19 18:49:55,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:49:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 33222 transitions. [2021-02-19 18:49:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:55,633 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:55,633 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:55,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-02-19 18:49:55,834 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:55,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:55,834 INFO L82 PathProgramCache]: Analyzing trace with hash 192185991, now seen corresponding path program 42 times [2021-02-19 18:49:55,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:55,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074835377] [2021-02-19 18:49:55,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:56,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074835377] [2021-02-19 18:49:56,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119623875] [2021-02-19 18:49:56,044 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 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 [2021-02-19 18:49:56,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:49:56,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:56,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:49:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:56,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:49:56,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:56,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:56,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:56,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:49:56,284 INFO L446 ElimStorePlain]: Different costs {0=[v_C_57], 2=[A]} [2021-02-19 18:49:56,288 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 24 treesize of output 20 [2021-02-19 18:49:56,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:56,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:56,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:56,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:56,310 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 34 treesize of output 22 [2021-02-19 18:49:56,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:56,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:56,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:56,325 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:62, output treesize:35 [2021-02-19 18:49:56,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:56,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:56,368 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 30 treesize of output 26 [2021-02-19 18:49:56,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:49:56,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:56,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:56,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:26 [2021-02-19 18:49:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:56,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:56,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 18:49:56,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396724045] [2021-02-19 18:49:56,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:49:56,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:56,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:49:56,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:49:56,443 INFO L87 Difference]: Start difference. First operand 8969 states and 33222 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) [2021-02-19 18:49:57,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:57,478 INFO L93 Difference]: Finished difference Result 12071 states and 43635 transitions. [2021-02-19 18:49:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:49:57,479 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 28 [2021-02-19 18:49:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:57,507 INFO L225 Difference]: With dead ends: 12071 [2021-02-19 18:49:57,508 INFO L226 Difference]: Without dead ends: 12004 [2021-02-19 18:49:57,508 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:49:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12004 states. [2021-02-19 18:49:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12004 to 8972. [2021-02-19 18:49:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8972 states, 8971 states have (on average 3.703711960762457) internal successors, (33226), 8971 states have internal predecessors, (33226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8972 states to 8972 states and 33226 transitions. [2021-02-19 18:49:57,695 INFO L78 Accepts]: Start accepts. Automaton has 8972 states and 33226 transitions. Word has length 28 [2021-02-19 18:49:57,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:57,695 INFO L480 AbstractCegarLoop]: Abstraction has 8972 states and 33226 transitions. [2021-02-19 18:49:57,695 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) [2021-02-19 18:49:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 8972 states and 33226 transitions. [2021-02-19 18:49:57,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:57,710 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:57,710 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:57,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-02-19 18:49:57,922 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:57,922 INFO L82 PathProgramCache]: Analyzing trace with hash 857892743, now seen corresponding path program 43 times [2021-02-19 18:49:57,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:57,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781810414] [2021-02-19 18:49:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:58,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781810414] [2021-02-19 18:49:58,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858178931] [2021-02-19 18:49:58,187 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 [2021-02-19 18:49:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:58,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:58,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:58,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:49:58,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:58,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:58,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:58,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:49:58,378 INFO L446 ElimStorePlain]: Different costs {0=[v_C_59], 3=[A]} [2021-02-19 18:49:58,381 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 28 treesize of output 24 [2021-02-19 18:49:58,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:58,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:58,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:49:58,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:49:58,403 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 38 treesize of output 24 [2021-02-19 18:49:58,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:58,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:58,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:58,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-02-19 18:49:58,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:49:58,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:49:58,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:49:58,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:49:58,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:49:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:58,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:49:58,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:49:58,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351381957] [2021-02-19 18:49:58,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:49:58,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:49:58,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:49:58,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:49:58,508 INFO L87 Difference]: Start difference. First operand 8972 states and 33226 transitions. Second operand has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:49:59,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:49:59,238 INFO L93 Difference]: Finished difference Result 12023 states and 43499 transitions. [2021-02-19 18:49:59,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:49:59,240 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) 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 [2021-02-19 18:49:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:49:59,268 INFO L225 Difference]: With dead ends: 12023 [2021-02-19 18:49:59,269 INFO L226 Difference]: Without dead ends: 11997 [2021-02-19 18:49:59,269 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:49:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11997 states. [2021-02-19 18:49:59,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11997 to 8987. [2021-02-19 18:49:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8987 states, 8986 states have (on average 3.703316269752949) internal successors, (33278), 8986 states have internal predecessors, (33278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:49:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8987 states to 8987 states and 33278 transitions. [2021-02-19 18:49:59,440 INFO L78 Accepts]: Start accepts. Automaton has 8987 states and 33278 transitions. Word has length 28 [2021-02-19 18:49:59,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:49:59,440 INFO L480 AbstractCegarLoop]: Abstraction has 8987 states and 33278 transitions. [2021-02-19 18:49:59,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:49:59,440 INFO L276 IsEmpty]: Start isEmpty. Operand 8987 states and 33278 transitions. [2021-02-19 18:49:59,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:49:59,456 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:49:59,456 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:49:59,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-02-19 18:49:59,657 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:49:59,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:49:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash -419206301, now seen corresponding path program 44 times [2021-02-19 18:49:59,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:49:59,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037899793] [2021-02-19 18:49:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:49:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:49:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:49:59,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037899793] [2021-02-19 18:49:59,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850050117] [2021-02-19 18:49:59,933 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 [2021-02-19 18:49:59,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:49:59,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:49:59,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:49:59,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:49:59,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:49:59,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:00,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:00,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:00,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-02-19 18:50:00,219 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_61], 2=[A]} [2021-02-19 18:50:00,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:50:00,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:00,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:00,232 INFO L518 ElimStorePlain]: Eliminatee v_C_61 vanished before elimination [2021-02-19 18:50:00,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:00,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:00,236 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 29 treesize of output 17 [2021-02-19 18:50:00,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:00,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:00,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:00,245 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:50:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:00,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:00,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:00,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010012564] [2021-02-19 18:50:00,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:00,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:00,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:00,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:00,266 INFO L87 Difference]: Start difference. First operand 8987 states and 33278 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:50:01,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:01,060 INFO L93 Difference]: Finished difference Result 12053 states and 43587 transitions. [2021-02-19 18:50:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:50:01,061 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-02-19 18:50:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:01,091 INFO L225 Difference]: With dead ends: 12053 [2021-02-19 18:50:01,092 INFO L226 Difference]: Without dead ends: 11990 [2021-02-19 18:50:01,092 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:50:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11990 states. [2021-02-19 18:50:01,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11990 to 9013. [2021-02-19 18:50:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9013 states, 9012 states have (on average 3.7012871726586773) internal successors, (33356), 9012 states have internal predecessors, (33356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9013 states to 9013 states and 33356 transitions. [2021-02-19 18:50:01,329 INFO L78 Accepts]: Start accepts. Automaton has 9013 states and 33356 transitions. Word has length 28 [2021-02-19 18:50:01,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:01,329 INFO L480 AbstractCegarLoop]: Abstraction has 9013 states and 33356 transitions. [2021-02-19 18:50:01,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-02-19 18:50:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 9013 states and 33356 transitions. [2021-02-19 18:50:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:01,347 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:01,347 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:01,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-02-19 18:50:01,548 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:01,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1847362979, now seen corresponding path program 45 times [2021-02-19 18:50:01,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:01,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137221759] [2021-02-19 18:50:01,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:01,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137221759] [2021-02-19 18:50:01,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331949115] [2021-02-19 18:50:01,863 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 [2021-02-19 18:50:01,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:50:01,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:01,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:01,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:01,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:01,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:01,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:01,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:01,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:50:02,084 INFO L446 ElimStorePlain]: Different costs {0=[v_C_63], 3=[A]} [2021-02-19 18:50:02,087 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 32 treesize of output 24 [2021-02-19 18:50:02,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:02,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:02,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:02,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:02,110 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 42 treesize of output 24 [2021-02-19 18:50:02,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:02,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:02,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:02,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:35 [2021-02-19 18:50:02,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:50:02,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:02,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:02,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:02,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:50:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:02,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:02,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:02,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781212550] [2021-02-19 18:50:02,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:02,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:02,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:02,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:02,185 INFO L87 Difference]: Start difference. First operand 9013 states and 33356 transitions. Second operand has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:50:03,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:03,012 INFO L93 Difference]: Finished difference Result 12107 states and 43732 transitions. [2021-02-19 18:50:03,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:50:03,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) 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 [2021-02-19 18:50:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:03,040 INFO L225 Difference]: With dead ends: 12107 [2021-02-19 18:50:03,041 INFO L226 Difference]: Without dead ends: 12035 [2021-02-19 18:50:03,041 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:50:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12035 states. [2021-02-19 18:50:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12035 to 9004. [2021-02-19 18:50:03,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9004 states, 9003 states have (on average 3.7024325224925025) internal successors, (33333), 9003 states have internal predecessors, (33333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9004 states to 9004 states and 33333 transitions. [2021-02-19 18:50:03,217 INFO L78 Accepts]: Start accepts. Automaton has 9004 states and 33333 transitions. Word has length 28 [2021-02-19 18:50:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:03,218 INFO L480 AbstractCegarLoop]: Abstraction has 9004 states and 33333 transitions. [2021-02-19 18:50:03,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:50:03,218 INFO L276 IsEmpty]: Start isEmpty. Operand 9004 states and 33333 transitions. [2021-02-19 18:50:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:03,236 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:03,236 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:03,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:03,439 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:03,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1511670301, now seen corresponding path program 46 times [2021-02-19 18:50:03,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:03,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235588919] [2021-02-19 18:50:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:03,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235588919] [2021-02-19 18:50:03,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820302704] [2021-02-19 18:50:03,696 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) [2021-02-19 18:50:03,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:50:03,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:03,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:03,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:03,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:03,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:03,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:03,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:03,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-02-19 18:50:03,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:50:03,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:03,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:03,951 INFO L518 ElimStorePlain]: Eliminatee v_C_65 vanished before elimination [2021-02-19 18:50:03,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-02-19 18:50:03,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:03,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:03,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:03,956 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-02-19 18:50:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:03,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:03,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:50:03,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323603965] [2021-02-19 18:50:03,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:50:03,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:03,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:50:03,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:03,979 INFO L87 Difference]: Start difference. First operand 9004 states and 33333 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) [2021-02-19 18:50:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:05,215 INFO L93 Difference]: Finished difference Result 13322 states and 47888 transitions. [2021-02-19 18:50:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:50:05,216 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 28 [2021-02-19 18:50:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:05,253 INFO L225 Difference]: With dead ends: 13322 [2021-02-19 18:50:05,253 INFO L226 Difference]: Without dead ends: 13282 [2021-02-19 18:50:05,253 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:50:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13282 states. [2021-02-19 18:50:05,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13282 to 9019. [2021-02-19 18:50:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9019 states, 9018 states have (on average 3.7020403637170105) internal successors, (33385), 9018 states have internal predecessors, (33385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9019 states to 9019 states and 33385 transitions. [2021-02-19 18:50:05,519 INFO L78 Accepts]: Start accepts. Automaton has 9019 states and 33385 transitions. Word has length 28 [2021-02-19 18:50:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:05,519 INFO L480 AbstractCegarLoop]: Abstraction has 9019 states and 33385 transitions. [2021-02-19 18:50:05,519 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) [2021-02-19 18:50:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 9019 states and 33385 transitions. [2021-02-19 18:50:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:05,535 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:05,535 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:05,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:05,736 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:05,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:05,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1380705945, now seen corresponding path program 47 times [2021-02-19 18:50:05,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:05,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52041573] [2021-02-19 18:50:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:06,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52041573] [2021-02-19 18:50:06,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519417136] [2021-02-19 18:50:06,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:06,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:50:06,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:06,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:06,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:06,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:50:06,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:06,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:06,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:06,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-02-19 18:50:06,218 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 24 treesize of output 20 [2021-02-19 18:50:06,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:06,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:06,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:50:06,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:06,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:06,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:06,237 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-02-19 18:50:06,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:50:06,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:06,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:06,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:06,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:50:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:06,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:06,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:50:06,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423622862] [2021-02-19 18:50:06,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:50:06,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:06,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:50:06,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:06,288 INFO L87 Difference]: Start difference. First operand 9019 states and 33385 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-02-19 18:50:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:07,145 INFO L93 Difference]: Finished difference Result 12012 states and 43524 transitions. [2021-02-19 18:50:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:50:07,146 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-02-19 18:50:07,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:07,175 INFO L225 Difference]: With dead ends: 12012 [2021-02-19 18:50:07,175 INFO L226 Difference]: Without dead ends: 11997 [2021-02-19 18:50:07,175 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:50:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11997 states. [2021-02-19 18:50:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11997 to 9021. [2021-02-19 18:50:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9021 states, 9020 states have (on average 3.7038802660753882) internal successors, (33409), 9020 states have internal predecessors, (33409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9021 states to 9021 states and 33409 transitions. [2021-02-19 18:50:07,363 INFO L78 Accepts]: Start accepts. Automaton has 9021 states and 33409 transitions. Word has length 28 [2021-02-19 18:50:07,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:07,364 INFO L480 AbstractCegarLoop]: Abstraction has 9021 states and 33409 transitions. [2021-02-19 18:50:07,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-02-19 18:50:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 9021 states and 33409 transitions. [2021-02-19 18:50:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:07,380 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:07,380 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:07,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:07,581 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:07,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:07,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1914740857, now seen corresponding path program 48 times [2021-02-19 18:50:07,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:07,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764901926] [2021-02-19 18:50:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:07,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764901926] [2021-02-19 18:50:07,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033034503] [2021-02-19 18:50:07,847 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 [2021-02-19 18:50:07,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:50:07,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:07,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:07,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:07,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:07,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:07,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:07,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:07,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:50:07,996 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 32 treesize of output 24 [2021-02-19 18:50:07,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:08,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:08,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:08,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:50 [2021-02-19 18:50:08,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:08,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:08,051 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 42 treesize of output 24 [2021-02-19 18:50:08,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:08,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:08,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:08,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:35 [2021-02-19 18:50:08,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:50:08,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:08,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:08,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:08,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:50:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:08,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:08,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:08,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534601510] [2021-02-19 18:50:08,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:08,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:08,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:08,125 INFO L87 Difference]: Start difference. First operand 9021 states and 33409 transitions. Second operand has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:50:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:08,480 INFO L93 Difference]: Finished difference Result 9157 states and 33788 transitions. [2021-02-19 18:50:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:50:08,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) 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 [2021-02-19 18:50:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:08,503 INFO L225 Difference]: With dead ends: 9157 [2021-02-19 18:50:08,503 INFO L226 Difference]: Without dead ends: 9114 [2021-02-19 18:50:08,503 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:08,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9114 states. [2021-02-19 18:50:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9114 to 9036. [2021-02-19 18:50:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9036 states, 9035 states have (on average 3.702711676812396) internal successors, (33454), 9035 states have internal predecessors, (33454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9036 states to 9036 states and 33454 transitions. [2021-02-19 18:50:08,655 INFO L78 Accepts]: Start accepts. Automaton has 9036 states and 33454 transitions. Word has length 28 [2021-02-19 18:50:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:08,655 INFO L480 AbstractCegarLoop]: Abstraction has 9036 states and 33454 transitions. [2021-02-19 18:50:08,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:50:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 9036 states and 33454 transitions. [2021-02-19 18:50:08,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:08,671 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:08,671 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:08,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-02-19 18:50:08,872 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:08,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:08,872 INFO L82 PathProgramCache]: Analyzing trace with hash -927249245, now seen corresponding path program 49 times [2021-02-19 18:50:08,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:08,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907198820] [2021-02-19 18:50:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:09,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907198820] [2021-02-19 18:50:09,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739417846] [2021-02-19 18:50:09,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:09,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:09,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:09,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:50:09,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:09,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:09,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:09,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-02-19 18:50:09,339 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 32 treesize of output 24 [2021-02-19 18:50:09,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:09,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:09,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:09,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:50 [2021-02-19 18:50:09,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:50:09,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:09,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:09,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:09,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-02-19 18:50:09,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:09,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:09,449 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 29 treesize of output 17 [2021-02-19 18:50:09,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:09,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:09,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:09,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-02-19 18:50:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:09,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:09,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:09,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489148204] [2021-02-19 18:50:09,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:09,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:09,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:09,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:09,624 INFO L87 Difference]: Start difference. First operand 9036 states and 33454 transitions. Second operand has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:50:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:10,147 INFO L93 Difference]: Finished difference Result 9150 states and 33776 transitions. [2021-02-19 18:50:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:50:10,147 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) 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 [2021-02-19 18:50:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:10,168 INFO L225 Difference]: With dead ends: 9150 [2021-02-19 18:50:10,169 INFO L226 Difference]: Without dead ends: 9129 [2021-02-19 18:50:10,169 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9129 states. [2021-02-19 18:50:10,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9129 to 9039. [2021-02-19 18:50:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9039 states, 9038 states have (on average 3.703252932064616) internal successors, (33470), 9038 states have internal predecessors, (33470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9039 states to 9039 states and 33470 transitions. [2021-02-19 18:50:10,326 INFO L78 Accepts]: Start accepts. Automaton has 9039 states and 33470 transitions. Word has length 28 [2021-02-19 18:50:10,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:10,326 INFO L480 AbstractCegarLoop]: Abstraction has 9039 states and 33470 transitions. [2021-02-19 18:50:10,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:50:10,326 INFO L276 IsEmpty]: Start isEmpty. Operand 9039 states and 33470 transitions. [2021-02-19 18:50:10,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:10,343 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:10,343 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:10,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-02-19 18:50:10,544 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:10,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:10,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1084663047, now seen corresponding path program 50 times [2021-02-19 18:50:10,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:10,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967552875] [2021-02-19 18:50:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:10,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967552875] [2021-02-19 18:50:10,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070376425] [2021-02-19 18:50:10,816 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 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 [2021-02-19 18:50:10,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:50:10,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:10,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:10,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:10,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:10,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:10,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:10,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:10,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:50:10,938 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 28 treesize of output 24 [2021-02-19 18:50:10,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:10,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:10,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:10,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:42 [2021-02-19 18:50:10,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:11,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:11,001 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 38 treesize of output 24 [2021-02-19 18:50:11,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:11,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:11,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:11,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:31 [2021-02-19 18:50:11,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:50:11,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:11,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:11,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:11,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:50:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:11,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:11,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:11,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435682029] [2021-02-19 18:50:11,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:11,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:11,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:11,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:11,118 INFO L87 Difference]: Start difference. First operand 9039 states and 33470 transitions. Second operand has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:50:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:11,685 INFO L93 Difference]: Finished difference Result 9220 states and 34007 transitions. [2021-02-19 18:50:11,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:50:11,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) 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 [2021-02-19 18:50:11,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:11,703 INFO L225 Difference]: With dead ends: 9220 [2021-02-19 18:50:11,704 INFO L226 Difference]: Without dead ends: 9205 [2021-02-19 18:50:11,704 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:50:11,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9205 states. [2021-02-19 18:50:11,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9205 to 9062. [2021-02-19 18:50:11,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9062 states, 9061 states have (on average 3.703123275576647) internal successors, (33554), 9061 states have internal predecessors, (33554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9062 states to 9062 states and 33554 transitions. [2021-02-19 18:50:11,833 INFO L78 Accepts]: Start accepts. Automaton has 9062 states and 33554 transitions. Word has length 28 [2021-02-19 18:50:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:11,833 INFO L480 AbstractCegarLoop]: Abstraction has 9062 states and 33554 transitions. [2021-02-19 18:50:11,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:50:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 9062 states and 33554 transitions. [2021-02-19 18:50:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:11,850 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:11,850 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:12,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-02-19 18:50:12,051 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:12,051 INFO L82 PathProgramCache]: Analyzing trace with hash 876329763, now seen corresponding path program 51 times [2021-02-19 18:50:12,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:12,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978366912] [2021-02-19 18:50:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:12,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978366912] [2021-02-19 18:50:12,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357446855] [2021-02-19 18:50:12,317 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 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 [2021-02-19 18:50:12,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:50:12,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:12,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 18:50:12,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:12,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:12,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:12,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:12,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:12,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-02-19 18:50:12,478 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 24 treesize of output 20 [2021-02-19 18:50:12,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:12,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:12,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:12,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:49 [2021-02-19 18:50:12,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:12,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:12,614 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 34 treesize of output 38 [2021-02-19 18:50:12,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:12,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:12,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:12,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:78 [2021-02-19 18:50:13,122 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_21], 3=[B, v_prenex_20]} [2021-02-19 18:50:13,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:13,136 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 9 treesize of output 14 [2021-02-19 18:50:13,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:50:13,252 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-02-19 18:50:13,253 INFO L628 ElimStorePlain]: treesize reduction 3, result has 97.7 percent of original size [2021-02-19 18:50:13,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:13,273 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 30 treesize of output 34 [2021-02-19 18:50:13,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:13,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:13,367 INFO L354 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2021-02-19 18:50:13,368 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 22 treesize of output 25 [2021-02-19 18:50:13,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:13,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:13,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 18:50:13,460 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:131, output treesize:336 [2021-02-19 18:50:13,599 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 18:50:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:13,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:13,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 19 [2021-02-19 18:50:13,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870165959] [2021-02-19 18:50:13,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:50:13,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:13,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:50:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:50:13,692 INFO L87 Difference]: Start difference. First operand 9062 states and 33554 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:15,164 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-02-19 18:50:15,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:15,525 INFO L93 Difference]: Finished difference Result 9293 states and 34199 transitions. [2021-02-19 18:50:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:50:15,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:50:15,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:15,543 INFO L225 Difference]: With dead ends: 9293 [2021-02-19 18:50:15,543 INFO L226 Difference]: Without dead ends: 9253 [2021-02-19 18:50:15,543 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:50:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9253 states. [2021-02-19 18:50:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9253 to 9081. [2021-02-19 18:50:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9081 states, 9080 states have (on average 3.702422907488987) internal successors, (33618), 9080 states have internal predecessors, (33618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9081 states to 9081 states and 33618 transitions. [2021-02-19 18:50:15,660 INFO L78 Accepts]: Start accepts. Automaton has 9081 states and 33618 transitions. Word has length 28 [2021-02-19 18:50:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:15,660 INFO L480 AbstractCegarLoop]: Abstraction has 9081 states and 33618 transitions. [2021-02-19 18:50:15,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 9081 states and 33618 transitions. [2021-02-19 18:50:15,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:15,673 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:15,674 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:15,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-02-19 18:50:15,888 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:15,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1265586781, now seen corresponding path program 52 times [2021-02-19 18:50:15,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:15,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680796811] [2021-02-19 18:50:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:16,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680796811] [2021-02-19 18:50:16,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425573432] [2021-02-19 18:50:16,158 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:50:16,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:50:16,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:16,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:16,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:16,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:16,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:16,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:16,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:16,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:50:16,294 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 28 treesize of output 24 [2021-02-19 18:50:16,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:16,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:16,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:16,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:42 [2021-02-19 18:50:16,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:50:16,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:16,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:16,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:16,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-02-19 18:50:16,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:16,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:16,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-02-19 18:50:16,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:16,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:16,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:16,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-02-19 18:50:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:16,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:16,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:16,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60451715] [2021-02-19 18:50:16,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:16,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:16,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:16,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:16,503 INFO L87 Difference]: Start difference. First operand 9081 states and 33618 transitions. Second operand has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:50:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:17,149 INFO L93 Difference]: Finished difference Result 9225 states and 34044 transitions. [2021-02-19 18:50:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:50:17,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) 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 [2021-02-19 18:50:17,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:17,181 INFO L225 Difference]: With dead ends: 9225 [2021-02-19 18:50:17,182 INFO L226 Difference]: Without dead ends: 9210 [2021-02-19 18:50:17,182 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:50:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9210 states. [2021-02-19 18:50:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9210 to 9081. [2021-02-19 18:50:17,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9081 states, 9080 states have (on average 3.7030837004405286) internal successors, (33624), 9080 states have internal predecessors, (33624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9081 states to 9081 states and 33624 transitions. [2021-02-19 18:50:17,343 INFO L78 Accepts]: Start accepts. Automaton has 9081 states and 33624 transitions. Word has length 28 [2021-02-19 18:50:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:17,343 INFO L480 AbstractCegarLoop]: Abstraction has 9081 states and 33624 transitions. [2021-02-19 18:50:17,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) 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) [2021-02-19 18:50:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 9081 states and 33624 transitions. [2021-02-19 18:50:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:17,360 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:17,360 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:17,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-02-19 18:50:17,561 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:17,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1937504669, now seen corresponding path program 53 times [2021-02-19 18:50:17,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:17,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136787850] [2021-02-19 18:50:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:17,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136787850] [2021-02-19 18:50:17,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209311701] [2021-02-19 18:50:17,829 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:50:17,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:50:17,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:17,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:17,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:17,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:17,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:17,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:17,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:17,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-02-19 18:50:18,066 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 24 treesize of output 20 [2021-02-19 18:50:18,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:18,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:18,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-02-19 18:50:18,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:18,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:18,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:50:18,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:18,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:18,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:18,091 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-02-19 18:50:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:18,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:18,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:50:18,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271379173] [2021-02-19 18:50:18,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:50:18,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:18,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:50:18,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:18,116 INFO L87 Difference]: Start difference. First operand 9081 states and 33624 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) [2021-02-19 18:50:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:19,676 INFO L93 Difference]: Finished difference Result 14502 states and 51854 transitions. [2021-02-19 18:50:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:50:19,677 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 28 [2021-02-19 18:50:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:19,715 INFO L225 Difference]: With dead ends: 14502 [2021-02-19 18:50:19,715 INFO L226 Difference]: Without dead ends: 14462 [2021-02-19 18:50:19,715 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:50:19,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14462 states. [2021-02-19 18:50:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14462 to 9068. [2021-02-19 18:50:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9068 states, 9067 states have (on average 3.7039814712694388) internal successors, (33584), 9067 states have internal predecessors, (33584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9068 states to 9068 states and 33584 transitions. [2021-02-19 18:50:19,933 INFO L78 Accepts]: Start accepts. Automaton has 9068 states and 33584 transitions. Word has length 28 [2021-02-19 18:50:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:19,933 INFO L480 AbstractCegarLoop]: Abstraction has 9068 states and 33584 transitions. [2021-02-19 18:50:19,933 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) [2021-02-19 18:50:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 9068 states and 33584 transitions. [2021-02-19 18:50:19,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:19,951 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:19,952 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:20,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:20,153 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:20,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1904703171, now seen corresponding path program 54 times [2021-02-19 18:50:20,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:20,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095669744] [2021-02-19 18:50:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:20,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095669744] [2021-02-19 18:50:20,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701557267] [2021-02-19 18:50:20,422 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 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 [2021-02-19 18:50:20,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:50:20,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:20,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:20,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:20,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:20,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:20,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:20,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:20,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:50:20,579 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 24 treesize of output 20 [2021-02-19 18:50:20,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:20,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:20,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:20,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:32 [2021-02-19 18:50:20,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:50:20,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:20,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:20,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:20,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-02-19 18:50:20,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:50:20,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:20,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:20,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:20,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:50:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:20,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:20,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:50:20,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736773290] [2021-02-19 18:50:20,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:50:20,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:20,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:50:20,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:20,701 INFO L87 Difference]: Start difference. First operand 9068 states and 33584 transitions. Second operand has 16 states, 16 states have (on average 2.6875) 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) [2021-02-19 18:50:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:21,185 INFO L93 Difference]: Finished difference Result 9271 states and 34152 transitions. [2021-02-19 18:50:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:50:21,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) 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 [2021-02-19 18:50:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:21,208 INFO L225 Difference]: With dead ends: 9271 [2021-02-19 18:50:21,208 INFO L226 Difference]: Without dead ends: 9246 [2021-02-19 18:50:21,209 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:50:21,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9246 states. [2021-02-19 18:50:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9246 to 9060. [2021-02-19 18:50:21,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9060 states, 9059 states have (on average 3.704161607241417) internal successors, (33556), 9059 states have internal predecessors, (33556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9060 states to 9060 states and 33556 transitions. [2021-02-19 18:50:21,367 INFO L78 Accepts]: Start accepts. Automaton has 9060 states and 33556 transitions. Word has length 28 [2021-02-19 18:50:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:21,368 INFO L480 AbstractCegarLoop]: Abstraction has 9060 states and 33556 transitions. [2021-02-19 18:50:21,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) 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) [2021-02-19 18:50:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 9060 states and 33556 transitions. [2021-02-19 18:50:21,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:21,385 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:21,385 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:21,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-02-19 18:50:21,585 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:21,586 INFO L82 PathProgramCache]: Analyzing trace with hash -221718289, now seen corresponding path program 55 times [2021-02-19 18:50:21,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:21,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248860162] [2021-02-19 18:50:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:21,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248860162] [2021-02-19 18:50:21,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285374813] [2021-02-19 18:50:21,868 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 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 [2021-02-19 18:50:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:21,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:21,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:21,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:21,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:21,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:21,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:21,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:50:22,017 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 28 treesize of output 24 [2021-02-19 18:50:22,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:22,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:22,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:22,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:42 [2021-02-19 18:50:22,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:22,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:22,119 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 34 treesize of output 22 [2021-02-19 18:50:22,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:22,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:22,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:22,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:29 [2021-02-19 18:50:22,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:50:22,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:22,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:22,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:22,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:50:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:22,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:22,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:22,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262149020] [2021-02-19 18:50:22,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:22,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:22,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:22,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:22,217 INFO L87 Difference]: Start difference. First operand 9060 states and 33556 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:50:22,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:22,773 INFO L93 Difference]: Finished difference Result 9259 states and 34116 transitions. [2021-02-19 18:50:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:50:22,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:50:22,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:22,799 INFO L225 Difference]: With dead ends: 9259 [2021-02-19 18:50:22,800 INFO L226 Difference]: Without dead ends: 9234 [2021-02-19 18:50:22,800 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:50:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9234 states. [2021-02-19 18:50:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9234 to 9040. [2021-02-19 18:50:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9040 states, 9039 states have (on average 3.7059409226684368) internal successors, (33498), 9039 states have internal predecessors, (33498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:22,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9040 states to 9040 states and 33498 transitions. [2021-02-19 18:50:22,986 INFO L78 Accepts]: Start accepts. Automaton has 9040 states and 33498 transitions. Word has length 28 [2021-02-19 18:50:22,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:22,986 INFO L480 AbstractCegarLoop]: Abstraction has 9040 states and 33498 transitions. [2021-02-19 18:50:22,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:50:22,986 INFO L276 IsEmpty]: Start isEmpty. Operand 9040 states and 33498 transitions. [2021-02-19 18:50:22,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:22,999 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:22,999 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:23,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:23,199 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:23,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1107342685, now seen corresponding path program 56 times [2021-02-19 18:50:23,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:23,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992878857] [2021-02-19 18:50:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:23,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992878857] [2021-02-19 18:50:23,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925137562] [2021-02-19 18:50:23,467 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 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 [2021-02-19 18:50:23,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:50:23,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:23,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:23,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:23,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:50:23,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:23,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:23,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:23,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-02-19 18:50:23,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:50:23,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:23,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:23,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 18:50:23,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:23,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:23,699 INFO L518 ElimStorePlain]: Eliminatee v_C_85 vanished before elimination [2021-02-19 18:50:23,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:23,699 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-02-19 18:50:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:23,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:23,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:50:23,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245888521] [2021-02-19 18:50:23,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:50:23,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:50:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:23,723 INFO L87 Difference]: Start difference. First operand 9040 states and 33498 transitions. Second operand has 16 states, 16 states have (on average 2.75) 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) [2021-02-19 18:50:25,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:25,319 INFO L93 Difference]: Finished difference Result 10525 states and 37719 transitions. [2021-02-19 18:50:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:50:25,320 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) 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 [2021-02-19 18:50:25,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:25,346 INFO L225 Difference]: With dead ends: 10525 [2021-02-19 18:50:25,346 INFO L226 Difference]: Without dead ends: 10495 [2021-02-19 18:50:25,346 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:50:25,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-02-19 18:50:25,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 9117. [2021-02-19 18:50:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9117 states, 9116 states have (on average 3.703488372093023) internal successors, (33761), 9116 states have internal predecessors, (33761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:25,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9117 states to 9117 states and 33761 transitions. [2021-02-19 18:50:25,520 INFO L78 Accepts]: Start accepts. Automaton has 9117 states and 33761 transitions. Word has length 28 [2021-02-19 18:50:25,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:25,520 INFO L480 AbstractCegarLoop]: Abstraction has 9117 states and 33761 transitions. [2021-02-19 18:50:25,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) 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) [2021-02-19 18:50:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 9117 states and 33761 transitions. [2021-02-19 18:50:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:25,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:25,536 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:25,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2021-02-19 18:50:25,737 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash -482683677, now seen corresponding path program 57 times [2021-02-19 18:50:25,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:25,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041356421] [2021-02-19 18:50:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:26,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041356421] [2021-02-19 18:50:26,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130791099] [2021-02-19 18:50:26,010 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 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 [2021-02-19 18:50:26,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:50:26,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:26,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:50:26,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:26,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:26,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:26,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:26,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:26,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-02-19 18:50:26,352 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_87], 2=[B]} [2021-02-19 18:50:26,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:50:26,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:26,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:26,363 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 18 treesize of output 14 [2021-02-19 18:50:26,367 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:26,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:26,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:26,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:26,377 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 24 treesize of output 16 [2021-02-19 18:50:26,378 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:26,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:26,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:26,383 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:48, output treesize:5 [2021-02-19 18:50:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:26,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:26,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 18:50:26,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845275345] [2021-02-19 18:50:26,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:50:26,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:26,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:50:26,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:50:26,403 INFO L87 Difference]: Start difference. First operand 9117 states and 33761 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) 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) [2021-02-19 18:50:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:28,218 INFO L93 Difference]: Finished difference Result 10439 states and 37480 transitions. [2021-02-19 18:50:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:50:28,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 28 [2021-02-19 18:50:28,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:28,244 INFO L225 Difference]: With dead ends: 10439 [2021-02-19 18:50:28,244 INFO L226 Difference]: Without dead ends: 10382 [2021-02-19 18:50:28,245 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:50:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10382 states. [2021-02-19 18:50:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10382 to 9142. [2021-02-19 18:50:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9142 states, 9141 states have (on average 3.702111366371294) internal successors, (33841), 9141 states have internal predecessors, (33841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9142 states to 9142 states and 33841 transitions. [2021-02-19 18:50:28,407 INFO L78 Accepts]: Start accepts. Automaton has 9142 states and 33841 transitions. Word has length 28 [2021-02-19 18:50:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:28,407 INFO L480 AbstractCegarLoop]: Abstraction has 9142 states and 33841 transitions. [2021-02-19 18:50:28,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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) [2021-02-19 18:50:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 9142 states and 33841 transitions. [2021-02-19 18:50:28,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:28,424 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:28,424 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:28,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:28,625 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:28,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1783885603, now seen corresponding path program 58 times [2021-02-19 18:50:28,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:28,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329931361] [2021-02-19 18:50:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:28,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329931361] [2021-02-19 18:50:28,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357504276] [2021-02-19 18:50:28,860 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 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 [2021-02-19 18:50:28,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:50:28,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:28,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:28,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:29,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:50:29,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:29,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:29,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:29,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-02-19 18:50:29,082 INFO L446 ElimStorePlain]: Different costs {0=[v_C_89], 5=[A]} [2021-02-19 18:50:29,085 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 32 treesize of output 24 [2021-02-19 18:50:29,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:29,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:29,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:29,102 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 29 treesize of output 19 [2021-02-19 18:50:29,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:29,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:29,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:29,112 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:23 [2021-02-19 18:50:29,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:50:29,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:29,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:29,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:29,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:50:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:29,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:29,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:50:29,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189340621] [2021-02-19 18:50:29,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:50:29,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:29,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:50:29,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:29,182 INFO L87 Difference]: Start difference. First operand 9142 states and 33841 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-02-19 18:50:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:29,632 INFO L93 Difference]: Finished difference Result 9288 states and 34273 transitions. [2021-02-19 18:50:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:50:29,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-02-19 18:50:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:29,656 INFO L225 Difference]: With dead ends: 9288 [2021-02-19 18:50:29,657 INFO L226 Difference]: Without dead ends: 9273 [2021-02-19 18:50:29,657 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:29,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9273 states. [2021-02-19 18:50:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9273 to 9137. [2021-02-19 18:50:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9137 states, 9136 states have (on average 3.7039185639229424) internal successors, (33839), 9136 states have internal predecessors, (33839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:29,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9137 states to 9137 states and 33839 transitions. [2021-02-19 18:50:29,814 INFO L78 Accepts]: Start accepts. Automaton has 9137 states and 33839 transitions. Word has length 28 [2021-02-19 18:50:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:29,815 INFO L480 AbstractCegarLoop]: Abstraction has 9137 states and 33839 transitions. [2021-02-19 18:50:29,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-02-19 18:50:29,815 INFO L276 IsEmpty]: Start isEmpty. Operand 9137 states and 33839 transitions. [2021-02-19 18:50:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:29,832 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:29,832 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:30,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:30,032 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:30,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1301740835, now seen corresponding path program 59 times [2021-02-19 18:50:30,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:30,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99032991] [2021-02-19 18:50:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:30,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99032991] [2021-02-19 18:50:30,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902366583] [2021-02-19 18:50:30,257 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:30,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:50:30,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:30,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:30,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:30,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:30,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:30,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:30,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:30,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-02-19 18:50:30,512 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_91], 2=[B]} [2021-02-19 18:50:30,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:50:30,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:30,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:30,529 INFO L518 ElimStorePlain]: Eliminatee v_C_91 vanished before elimination [2021-02-19 18:50:30,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:30,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:30,534 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 29 treesize of output 17 [2021-02-19 18:50:30,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:30,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:30,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:30,546 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:50:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:30,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:30,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:30,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567435487] [2021-02-19 18:50:30,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:30,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:30,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:30,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:30,574 INFO L87 Difference]: Start difference. First operand 9137 states and 33839 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) 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) [2021-02-19 18:50:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:31,478 INFO L93 Difference]: Finished difference Result 11789 states and 42730 transitions. [2021-02-19 18:50:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:50:31,479 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) 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 [2021-02-19 18:50:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:31,509 INFO L225 Difference]: With dead ends: 11789 [2021-02-19 18:50:31,509 INFO L226 Difference]: Without dead ends: 11764 [2021-02-19 18:50:31,510 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:50:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11764 states. [2021-02-19 18:50:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11764 to 9159. [2021-02-19 18:50:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9159 states, 9158 states have (on average 3.7034286962218825) internal successors, (33916), 9158 states have internal predecessors, (33916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9159 states to 9159 states and 33916 transitions. [2021-02-19 18:50:31,688 INFO L78 Accepts]: Start accepts. Automaton has 9159 states and 33916 transitions. Word has length 28 [2021-02-19 18:50:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:31,688 INFO L480 AbstractCegarLoop]: Abstraction has 9159 states and 33916 transitions. [2021-02-19 18:50:31,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) 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) [2021-02-19 18:50:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 9159 states and 33916 transitions. [2021-02-19 18:50:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:31,705 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:31,705 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:31,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:31,906 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:31,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:31,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1690531929, now seen corresponding path program 60 times [2021-02-19 18:50:31,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:31,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580363612] [2021-02-19 18:50:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580363612] [2021-02-19 18:50:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541480449] [2021-02-19 18:50:32,168 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 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 [2021-02-19 18:50:32,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:50:32,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:32,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:50:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:32,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:32,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:32,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:32,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:32,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:52 [2021-02-19 18:50:32,671 INFO L446 ElimStorePlain]: Different costs {0=[v_C_93], 2=[A], 3=[B]} [2021-02-19 18:50:32,675 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 24 treesize of output 20 [2021-02-19 18:50:32,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:32,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:32,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:32,719 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 30 treesize of output 38 [2021-02-19 18:50:32,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:50:32,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:32,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:32,783 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 68 treesize of output 64 [2021-02-19 18:50:32,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-02-19 18:50:32,921 INFO L628 ElimStorePlain]: treesize reduction 134, result has 28.3 percent of original size [2021-02-19 18:50:32,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:32,942 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:71, output treesize:87 [2021-02-19 18:50:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:33,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:33,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-02-19 18:50:33,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882708524] [2021-02-19 18:50:33,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:50:33,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:33,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:50:33,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:50:33,050 INFO L87 Difference]: Start difference. First operand 9159 states and 33916 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) 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) [2021-02-19 18:50:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:34,422 INFO L93 Difference]: Finished difference Result 11833 states and 42826 transitions. [2021-02-19 18:50:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:50:34,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) 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 28 [2021-02-19 18:50:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:34,452 INFO L225 Difference]: With dead ends: 11833 [2021-02-19 18:50:34,452 INFO L226 Difference]: Without dead ends: 11721 [2021-02-19 18:50:34,453 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:50:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11721 states. [2021-02-19 18:50:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11721 to 9181. [2021-02-19 18:50:34,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9181 states, 9180 states have (on average 3.7010893246187364) internal successors, (33976), 9180 states have internal predecessors, (33976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9181 states to 9181 states and 33976 transitions. [2021-02-19 18:50:34,636 INFO L78 Accepts]: Start accepts. Automaton has 9181 states and 33976 transitions. Word has length 28 [2021-02-19 18:50:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:34,636 INFO L480 AbstractCegarLoop]: Abstraction has 9181 states and 33976 transitions. [2021-02-19 18:50:34,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) 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) [2021-02-19 18:50:34,636 INFO L276 IsEmpty]: Start isEmpty. Operand 9181 states and 33976 transitions. [2021-02-19 18:50:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:34,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:34,653 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:34,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-02-19 18:50:34,854 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:34,854 INFO L82 PathProgramCache]: Analyzing trace with hash 624640999, now seen corresponding path program 61 times [2021-02-19 18:50:34,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:34,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347126405] [2021-02-19 18:50:34,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:35,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347126405] [2021-02-19 18:50:35,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386472319] [2021-02-19 18:50:35,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:50:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:35,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:35,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:35,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:50:35,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:35,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:35,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:35,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-02-19 18:50:35,428 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_95], 2=[B]} [2021-02-19 18:50:35,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:50:35,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:35,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:35,447 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 18 treesize of output 14 [2021-02-19 18:50:35,450 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:35,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:35,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:35,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:35,466 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 33 treesize of output 21 [2021-02-19 18:50:35,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:35,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:35,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:35,477 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:50:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:35,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:35,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:35,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074298099] [2021-02-19 18:50:35,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:35,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:35,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:35,510 INFO L87 Difference]: Start difference. First operand 9181 states and 33976 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:50:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:36,433 INFO L93 Difference]: Finished difference Result 12702 states and 45904 transitions. [2021-02-19 18:50:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:50:36,434 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:50:36,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:36,468 INFO L225 Difference]: With dead ends: 12702 [2021-02-19 18:50:36,468 INFO L226 Difference]: Without dead ends: 12661 [2021-02-19 18:50:36,469 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:50:36,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12661 states. [2021-02-19 18:50:36,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12661 to 9176. [2021-02-19 18:50:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9176 states, 9175 states have (on average 3.701907356948229) internal successors, (33965), 9175 states have internal predecessors, (33965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9176 states to 9176 states and 33965 transitions. [2021-02-19 18:50:36,656 INFO L78 Accepts]: Start accepts. Automaton has 9176 states and 33965 transitions. Word has length 28 [2021-02-19 18:50:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:36,656 INFO L480 AbstractCegarLoop]: Abstraction has 9176 states and 33965 transitions. [2021-02-19 18:50:36,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:50:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 9176 states and 33965 transitions. [2021-02-19 18:50:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:36,674 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:36,674 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:36,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:36,874 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:36,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:36,875 INFO L82 PathProgramCache]: Analyzing trace with hash -622657365, now seen corresponding path program 62 times [2021-02-19 18:50:36,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:36,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474290919] [2021-02-19 18:50:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:37,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474290919] [2021-02-19 18:50:37,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367043552] [2021-02-19 18:50:37,236 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 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 [2021-02-19 18:50:37,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:50:37,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:37,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:37,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:37,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:37,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:37,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:37,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:37,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:54 [2021-02-19 18:50:37,499 INFO L446 ElimStorePlain]: Different costs {0=[v_C_97], 2=[B]} [2021-02-19 18:50:37,504 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 24 treesize of output 20 [2021-02-19 18:50:37,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:37,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:37,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:37,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:37,531 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 34 treesize of output 22 [2021-02-19 18:50:37,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:37,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:37,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:37,550 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-02-19 18:50:37,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:50:37,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:37,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:37,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:37,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:50:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:37,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:37,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:37,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686534084] [2021-02-19 18:50:37,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:37,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:37,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:37,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:37,629 INFO L87 Difference]: Start difference. First operand 9176 states and 33965 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:50:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:38,407 INFO L93 Difference]: Finished difference Result 11742 states and 42631 transitions. [2021-02-19 18:50:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:50:38,407 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:50:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:38,428 INFO L225 Difference]: With dead ends: 11742 [2021-02-19 18:50:38,428 INFO L226 Difference]: Without dead ends: 11717 [2021-02-19 18:50:38,428 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:50:38,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11717 states. [2021-02-19 18:50:38,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11717 to 9163. [2021-02-19 18:50:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9163 states, 9162 states have (on average 3.7049770792403405) internal successors, (33945), 9162 states have internal predecessors, (33945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9163 states to 9163 states and 33945 transitions. [2021-02-19 18:50:38,599 INFO L78 Accepts]: Start accepts. Automaton has 9163 states and 33945 transitions. Word has length 28 [2021-02-19 18:50:38,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:38,599 INFO L480 AbstractCegarLoop]: Abstraction has 9163 states and 33945 transitions. [2021-02-19 18:50:38,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:50:38,599 INFO L276 IsEmpty]: Start isEmpty. Operand 9163 states and 33945 transitions. [2021-02-19 18:50:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:38,617 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:38,617 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:38,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:38,818 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:38,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash 497993159, now seen corresponding path program 63 times [2021-02-19 18:50:38,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:38,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874530075] [2021-02-19 18:50:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:39,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874530075] [2021-02-19 18:50:39,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028088729] [2021-02-19 18:50:39,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:50:39,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:50:39,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:39,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:50:39,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:39,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:39,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:39,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:39,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:39,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:50:39,677 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_99], 2=[B]} [2021-02-19 18:50:39,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:50:39,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:39,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:39,694 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 18 treesize of output 14 [2021-02-19 18:50:39,696 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:39,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:39,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:39,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:39,710 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 24 treesize of output 16 [2021-02-19 18:50:39,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:39,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:39,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:39,719 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:48, output treesize:5 [2021-02-19 18:50:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:39,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:39,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-02-19 18:50:39,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334414322] [2021-02-19 18:50:39,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:50:39,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:39,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:50:39,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:50:39,742 INFO L87 Difference]: Start difference. First operand 9163 states and 33945 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:41,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:41,457 INFO L93 Difference]: Finished difference Result 12008 states and 43445 transitions. [2021-02-19 18:50:41,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:50:41,459 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:50:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:41,488 INFO L225 Difference]: With dead ends: 12008 [2021-02-19 18:50:41,489 INFO L226 Difference]: Without dead ends: 11934 [2021-02-19 18:50:41,489 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:50:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11934 states. [2021-02-19 18:50:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11934 to 9267. [2021-02-19 18:50:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9267 states, 9266 states have (on average 3.699870494280164) internal successors, (34283), 9266 states have internal predecessors, (34283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 34283 transitions. [2021-02-19 18:50:41,660 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 34283 transitions. Word has length 28 [2021-02-19 18:50:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:41,660 INFO L480 AbstractCegarLoop]: Abstraction has 9267 states and 34283 transitions. [2021-02-19 18:50:41,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 34283 transitions. [2021-02-19 18:50:41,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:41,735 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:41,735 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:41,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-02-19 18:50:41,936 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1530404857, now seen corresponding path program 64 times [2021-02-19 18:50:41,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:41,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814142669] [2021-02-19 18:50:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:42,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814142669] [2021-02-19 18:50:42,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052172665] [2021-02-19 18:50:42,280 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 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 [2021-02-19 18:50:42,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:50:42,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:42,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:42,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:42,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:50:42,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:42,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:42,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:42,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-02-19 18:50:42,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:50:42,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:42,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:42,508 INFO L518 ElimStorePlain]: Eliminatee v_C_101 vanished before elimination [2021-02-19 18:50:42,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:42,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-02-19 18:50:42,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:50:42,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:42,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:42,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:42,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:50:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:42,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:42,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:50:42,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256953738] [2021-02-19 18:50:42,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:50:42,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:42,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:50:42,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:42,585 INFO L87 Difference]: Start difference. First operand 9267 states and 34283 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-02-19 18:50:43,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:43,176 INFO L93 Difference]: Finished difference Result 9388 states and 34610 transitions. [2021-02-19 18:50:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:50:43,177 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-02-19 18:50:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:43,199 INFO L225 Difference]: With dead ends: 9388 [2021-02-19 18:50:43,199 INFO L226 Difference]: Without dead ends: 9362 [2021-02-19 18:50:43,199 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9362 states. [2021-02-19 18:50:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9362 to 9287. [2021-02-19 18:50:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9287 states, 9286 states have (on average 3.699978462201163) internal successors, (34358), 9286 states have internal predecessors, (34358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9287 states to 9287 states and 34358 transitions. [2021-02-19 18:50:43,352 INFO L78 Accepts]: Start accepts. Automaton has 9287 states and 34358 transitions. Word has length 28 [2021-02-19 18:50:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:43,352 INFO L480 AbstractCegarLoop]: Abstraction has 9287 states and 34358 transitions. [2021-02-19 18:50:43,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-02-19 18:50:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 9287 states and 34358 transitions. [2021-02-19 18:50:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:43,369 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:43,369 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:43,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:43,570 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:43,570 INFO L82 PathProgramCache]: Analyzing trace with hash 827152731, now seen corresponding path program 65 times [2021-02-19 18:50:43,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:43,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851766462] [2021-02-19 18:50:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:43,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851766462] [2021-02-19 18:50:43,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760537065] [2021-02-19 18:50:43,946 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 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 [2021-02-19 18:50:43,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:50:43,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:43,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:43,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:44,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:50:44,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:44,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:44,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:44,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-02-19 18:50:44,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:50:44,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:44,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:44,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-02-19 18:50:44,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:44,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:44,202 INFO L518 ElimStorePlain]: Eliminatee v_C_103 vanished before elimination [2021-02-19 18:50:44,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:44,203 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-02-19 18:50:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:44,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:44,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:50:44,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99404404] [2021-02-19 18:50:44,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:50:44,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:44,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:50:44,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:44,227 INFO L87 Difference]: Start difference. First operand 9287 states and 34358 transitions. Second operand has 16 states, 16 states have (on average 2.75) 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) [2021-02-19 18:50:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:45,602 INFO L93 Difference]: Finished difference Result 13209 states and 47496 transitions. [2021-02-19 18:50:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:50:45,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) 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 [2021-02-19 18:50:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:45,629 INFO L225 Difference]: With dead ends: 13209 [2021-02-19 18:50:45,630 INFO L226 Difference]: Without dead ends: 13126 [2021-02-19 18:50:45,630 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:50:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13126 states. [2021-02-19 18:50:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13126 to 9354. [2021-02-19 18:50:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9354 states, 9353 states have (on average 3.6982786271784454) internal successors, (34590), 9353 states have internal predecessors, (34590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9354 states to 9354 states and 34590 transitions. [2021-02-19 18:50:45,776 INFO L78 Accepts]: Start accepts. Automaton has 9354 states and 34590 transitions. Word has length 28 [2021-02-19 18:50:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:45,776 INFO L480 AbstractCegarLoop]: Abstraction has 9354 states and 34590 transitions. [2021-02-19 18:50:45,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) 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) [2021-02-19 18:50:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 9354 states and 34590 transitions. [2021-02-19 18:50:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:45,790 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:45,790 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:45,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:45,991 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:45,991 INFO L82 PathProgramCache]: Analyzing trace with hash 289659875, now seen corresponding path program 66 times [2021-02-19 18:50:45,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:45,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10232765] [2021-02-19 18:50:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:46,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10232765] [2021-02-19 18:50:46,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865520118] [2021-02-19 18:50:46,332 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 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 [2021-02-19 18:50:46,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:50:46,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:46,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:50:46,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:46,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:46,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:46,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:46,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:46,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-02-19 18:50:46,833 INFO L446 ElimStorePlain]: Different costs {0=[v_C_105], 2=[A], 3=[B]} [2021-02-19 18:50:46,840 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 24 treesize of output 20 [2021-02-19 18:50:46,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:46,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:46,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:46,880 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 33 [2021-02-19 18:50:46,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:50:46,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:46,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:46,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:46,951 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 70 treesize of output 66 [2021-02-19 18:50:46,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-02-19 18:50:47,067 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-02-19 18:50:47,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:47,088 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:68, output treesize:49 [2021-02-19 18:50:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:47,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:47,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 18:50:47,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147598689] [2021-02-19 18:50:47,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:50:47,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:47,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:50:47,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:50:47,168 INFO L87 Difference]: Start difference. First operand 9354 states and 34590 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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) [2021-02-19 18:50:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:48,594 INFO L93 Difference]: Finished difference Result 12040 states and 43555 transitions. [2021-02-19 18:50:48,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:50:48,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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 [2021-02-19 18:50:48,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:48,625 INFO L225 Difference]: With dead ends: 12040 [2021-02-19 18:50:48,625 INFO L226 Difference]: Without dead ends: 11916 [2021-02-19 18:50:48,626 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:50:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11916 states. [2021-02-19 18:50:48,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11916 to 9385. [2021-02-19 18:50:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9385 states, 9384 states have (on average 3.6944799658994034) internal successors, (34669), 9384 states have internal predecessors, (34669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:48,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9385 states to 9385 states and 34669 transitions. [2021-02-19 18:50:48,813 INFO L78 Accepts]: Start accepts. Automaton has 9385 states and 34669 transitions. Word has length 28 [2021-02-19 18:50:48,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:48,813 INFO L480 AbstractCegarLoop]: Abstraction has 9385 states and 34669 transitions. [2021-02-19 18:50:48,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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) [2021-02-19 18:50:48,813 INFO L276 IsEmpty]: Start isEmpty. Operand 9385 states and 34669 transitions. [2021-02-19 18:50:48,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:48,831 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:48,831 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:49,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-02-19 18:50:49,034 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:49,034 INFO L82 PathProgramCache]: Analyzing trace with hash 420624231, now seen corresponding path program 67 times [2021-02-19 18:50:49,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:49,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803686568] [2021-02-19 18:50:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:49,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803686568] [2021-02-19 18:50:49,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359576073] [2021-02-19 18:50:49,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:50:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:49,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:49,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:49,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:50:49,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:49,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:49,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:49,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-02-19 18:50:49,537 INFO L446 ElimStorePlain]: Different costs {0=[v_C_107], 2=[B]} [2021-02-19 18:50:49,540 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 24 treesize of output 20 [2021-02-19 18:50:49,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:49,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:49,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:49,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:49,557 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 34 treesize of output 22 [2021-02-19 18:50:49,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:49,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:49,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:49,569 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-02-19 18:50:49,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:50:49,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:49,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:49,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:49,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:50:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:49,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:49,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:49,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257223376] [2021-02-19 18:50:49,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:49,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:49,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:49,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:49,641 INFO L87 Difference]: Start difference. First operand 9385 states and 34669 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:50:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:50,385 INFO L93 Difference]: Finished difference Result 11964 states and 43369 transitions. [2021-02-19 18:50:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:50:50,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:50:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:50,417 INFO L225 Difference]: With dead ends: 11964 [2021-02-19 18:50:50,417 INFO L226 Difference]: Without dead ends: 11925 [2021-02-19 18:50:50,417 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:50:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11925 states. [2021-02-19 18:50:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11925 to 9384. [2021-02-19 18:50:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9384 states, 9383 states have (on average 3.695406586379623) internal successors, (34674), 9383 states have internal predecessors, (34674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9384 states to 9384 states and 34674 transitions. [2021-02-19 18:50:50,601 INFO L78 Accepts]: Start accepts. Automaton has 9384 states and 34674 transitions. Word has length 28 [2021-02-19 18:50:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:50,601 INFO L480 AbstractCegarLoop]: Abstraction has 9384 states and 34674 transitions. [2021-02-19 18:50:50,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:50:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 9384 states and 34674 transitions. [2021-02-19 18:50:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:50,618 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:50,618 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:50,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-02-19 18:50:50,819 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:50,819 INFO L82 PathProgramCache]: Analyzing trace with hash -113410681, now seen corresponding path program 68 times [2021-02-19 18:50:50,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:50,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848266688] [2021-02-19 18:50:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:51,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848266688] [2021-02-19 18:50:51,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485972069] [2021-02-19 18:50:51,115 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 [2021-02-19 18:50:51,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:50:51,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:50:51,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:51,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:51,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:51,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:51,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:51,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-02-19 18:50:51,280 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 24 treesize of output 20 [2021-02-19 18:50:51,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:51,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:51,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:51,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:50 [2021-02-19 18:50:51,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:50:51,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:51,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:51,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:51,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-02-19 18:50:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:51,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:51,408 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 33 treesize of output 17 [2021-02-19 18:50:51,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:51,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:51,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:51,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-02-19 18:50:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:51,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:51,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:51,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430631653] [2021-02-19 18:50:51,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:51,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:51,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:51,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:51,526 INFO L87 Difference]: Start difference. First operand 9384 states and 34674 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:50:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:52,160 INFO L93 Difference]: Finished difference Result 9538 states and 35130 transitions. [2021-02-19 18:50:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:50:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:50:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:52,187 INFO L225 Difference]: With dead ends: 9538 [2021-02-19 18:50:52,187 INFO L226 Difference]: Without dead ends: 9523 [2021-02-19 18:50:52,187 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:50:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-02-19 18:50:52,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 9399. [2021-02-19 18:50:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 9398 states have (on average 3.6950414981911046) internal successors, (34726), 9398 states have internal predecessors, (34726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 34726 transitions. [2021-02-19 18:50:52,386 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 34726 transitions. Word has length 28 [2021-02-19 18:50:52,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:52,387 INFO L480 AbstractCegarLoop]: Abstraction has 9399 states and 34726 transitions. [2021-02-19 18:50:52,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:50:52,387 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 34726 transitions. [2021-02-19 18:50:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:52,406 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:52,406 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:52,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-02-19 18:50:52,607 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash 874080931, now seen corresponding path program 69 times [2021-02-19 18:50:52,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:52,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60263550] [2021-02-19 18:50:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:52,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60263550] [2021-02-19 18:50:52,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745586161] [2021-02-19 18:50:52,922 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) [2021-02-19 18:50:52,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:50:52,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:52,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:50:52,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:53,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:50:53,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:53,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:53,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:53,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:50:53,235 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 24 treesize of output 20 [2021-02-19 18:50:53,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:53,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:53,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:53,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:51 [2021-02-19 18:50:53,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:53,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:53,347 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 34 treesize of output 38 [2021-02-19 18:50:53,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:53,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:53,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:53,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:78 [2021-02-19 18:50:53,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:53,612 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 30 treesize of output 26 [2021-02-19 18:50:53,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:50:53,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:53,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:53,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:53,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2021-02-19 18:50:53,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:53,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 18:50:53,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:53,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-02-19 18:50:53,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:53,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-02-19 18:50:53,647 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:53,656 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-02-19 18:50:53,657 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 42 treesize of output 1 [2021-02-19 18:50:53,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:53,726 INFO L628 ElimStorePlain]: treesize reduction 12, result has 85.7 percent of original size [2021-02-19 18:50:53,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 18:50:53,728 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:226, output treesize:72 [2021-02-19 18:50:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:53,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:53,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-02-19 18:50:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916910767] [2021-02-19 18:50:53,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:50:53,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:50:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:50:53,850 INFO L87 Difference]: Start difference. First operand 9399 states and 34726 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) 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) [2021-02-19 18:50:55,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:55,646 INFO L93 Difference]: Finished difference Result 9794 states and 35825 transitions. [2021-02-19 18:50:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:50:55,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) 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 28 [2021-02-19 18:50:55,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:55,672 INFO L225 Difference]: With dead ends: 9794 [2021-02-19 18:50:55,672 INFO L226 Difference]: Without dead ends: 9744 [2021-02-19 18:50:55,672 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:50:55,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9744 states. [2021-02-19 18:50:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9744 to 9402. [2021-02-19 18:50:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9402 states, 9401 states have (on average 3.6955643016700352) internal successors, (34742), 9401 states have internal predecessors, (34742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9402 states to 9402 states and 34742 transitions. [2021-02-19 18:50:55,834 INFO L78 Accepts]: Start accepts. Automaton has 9402 states and 34742 transitions. Word has length 28 [2021-02-19 18:50:55,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:55,834 INFO L480 AbstractCegarLoop]: Abstraction has 9402 states and 34742 transitions. [2021-02-19 18:50:55,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) 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) [2021-02-19 18:50:55,834 INFO L276 IsEmpty]: Start isEmpty. Operand 9402 states and 34742 transitions. [2021-02-19 18:50:55,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:55,850 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:55,850 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:56,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:50:56,050 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:56,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1095205663, now seen corresponding path program 70 times [2021-02-19 18:50:56,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:56,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097866460] [2021-02-19 18:50:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:56,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097866460] [2021-02-19 18:50:56,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892675487] [2021-02-19 18:50:56,393 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 [2021-02-19 18:50:56,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:50:56,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:56,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:56,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:56,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:50:56,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:56,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:56,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:56,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-02-19 18:50:56,664 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_113], 2=[B]} [2021-02-19 18:50:56,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:50:56,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:56,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:56,684 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 18 treesize of output 14 [2021-02-19 18:50:56,686 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:56,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:56,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:56,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:56,703 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 33 treesize of output 21 [2021-02-19 18:50:56,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:56,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:56,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:56,714 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:50:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:56,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:56,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:56,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294577519] [2021-02-19 18:50:56,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:56,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:56,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:56,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:56,748 INFO L87 Difference]: Start difference. First operand 9402 states and 34742 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:50:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:50:57,669 INFO L93 Difference]: Finished difference Result 12982 states and 46874 transitions. [2021-02-19 18:50:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:50:57,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:50:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:50:57,760 INFO L225 Difference]: With dead ends: 12982 [2021-02-19 18:50:57,760 INFO L226 Difference]: Without dead ends: 12939 [2021-02-19 18:50:57,760 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:50:57,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12939 states. [2021-02-19 18:50:57,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12939 to 9382. [2021-02-19 18:50:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9382 states, 9381 states have (on average 3.6976868137725187) internal successors, (34688), 9381 states have internal predecessors, (34688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:50:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9382 states to 9382 states and 34688 transitions. [2021-02-19 18:50:57,936 INFO L78 Accepts]: Start accepts. Automaton has 9382 states and 34688 transitions. Word has length 28 [2021-02-19 18:50:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:50:57,937 INFO L480 AbstractCegarLoop]: Abstraction has 9382 states and 34688 transitions. [2021-02-19 18:50:57,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:50:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 9382 states and 34688 transitions. [2021-02-19 18:50:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:50:57,953 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:50:57,953 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:50:58,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-02-19 18:50:58,154 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:50:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:50:58,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2118517725, now seen corresponding path program 71 times [2021-02-19 18:50:58,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:50:58,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527369060] [2021-02-19 18:50:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:50:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:50:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:58,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527369060] [2021-02-19 18:50:58,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847608357] [2021-02-19 18:50:58,438 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 [2021-02-19 18:50:58,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:50:58,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:50:58,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:50:58,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:50:58,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:50:58,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:58,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:58,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:50:58,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:65 [2021-02-19 18:50:58,816 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_115], 2=[B]} [2021-02-19 18:50:58,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:50:58,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:58,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:58,835 INFO L518 ElimStorePlain]: Eliminatee v_C_115 vanished before elimination [2021-02-19 18:50:58,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:50:58,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:50:58,841 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 33 treesize of output 21 [2021-02-19 18:50:58,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:50:58,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:50:58,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:50:58,854 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:50:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:50:58,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:50:58,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:50:58,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100326768] [2021-02-19 18:50:58,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:50:58,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:50:58,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:50:58,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:50:58,887 INFO L87 Difference]: Start difference. First operand 9382 states and 34688 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) 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) [2021-02-19 18:51:00,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:00,106 INFO L93 Difference]: Finished difference Result 12130 states and 43953 transitions. [2021-02-19 18:51:00,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:51:00,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) 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 [2021-02-19 18:51:00,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:00,138 INFO L225 Difference]: With dead ends: 12130 [2021-02-19 18:51:00,138 INFO L226 Difference]: Without dead ends: 12115 [2021-02-19 18:51:00,138 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:51:00,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12115 states. [2021-02-19 18:51:00,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12115 to 9418. [2021-02-19 18:51:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9418 states, 9417 states have (on average 3.6950196453222897) internal successors, (34796), 9417 states have internal predecessors, (34796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9418 states to 9418 states and 34796 transitions. [2021-02-19 18:51:00,317 INFO L78 Accepts]: Start accepts. Automaton has 9418 states and 34796 transitions. Word has length 28 [2021-02-19 18:51:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:00,317 INFO L480 AbstractCegarLoop]: Abstraction has 9418 states and 34796 transitions. [2021-02-19 18:51:00,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) 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) [2021-02-19 18:51:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 9418 states and 34796 transitions. [2021-02-19 18:51:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:00,335 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:00,335 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:00,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:00,535 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:00,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:00,536 INFO L82 PathProgramCache]: Analyzing trace with hash -815823193, now seen corresponding path program 72 times [2021-02-19 18:51:00,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:00,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408856737] [2021-02-19 18:51:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:00,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408856737] [2021-02-19 18:51:00,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722600515] [2021-02-19 18:51:00,867 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:00,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:51:00,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:00,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:51:00,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:01,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:51:01,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:01,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:01,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:01,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-02-19 18:51:01,277 INFO L446 ElimStorePlain]: Different costs {0=[v_C_117], 2=[A, B]} [2021-02-19 18:51:01,282 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 24 treesize of output 20 [2021-02-19 18:51:01,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:01,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:01,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:01,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2021-02-19 18:51:01,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:51:01,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:01,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:01,385 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 68 treesize of output 64 [2021-02-19 18:51:01,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-02-19 18:51:01,479 INFO L628 ElimStorePlain]: treesize reduction 65, result has 42.0 percent of original size [2021-02-19 18:51:01,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:01,487 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:87 [2021-02-19 18:51:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:01,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:01,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-02-19 18:51:01,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390081458] [2021-02-19 18:51:01,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:51:01,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:01,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:51:01,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:01,600 INFO L87 Difference]: Start difference. First operand 9418 states and 34796 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) [2021-02-19 18:51:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:02,879 INFO L93 Difference]: Finished difference Result 12105 states and 43821 transitions. [2021-02-19 18:51:02,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:51:02,880 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 28 [2021-02-19 18:51:02,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:02,907 INFO L225 Difference]: With dead ends: 12105 [2021-02-19 18:51:02,908 INFO L226 Difference]: Without dead ends: 12040 [2021-02-19 18:51:02,908 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:51:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12040 states. [2021-02-19 18:51:03,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12040 to 9432. [2021-02-19 18:51:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9432 states, 9431 states have (on average 3.69441204538225) internal successors, (34842), 9431 states have internal predecessors, (34842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:03,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9432 states to 9432 states and 34842 transitions. [2021-02-19 18:51:03,083 INFO L78 Accepts]: Start accepts. Automaton has 9432 states and 34842 transitions. Word has length 28 [2021-02-19 18:51:03,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:03,083 INFO L480 AbstractCegarLoop]: Abstraction has 9432 states and 34842 transitions. [2021-02-19 18:51:03,083 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) [2021-02-19 18:51:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 9432 states and 34842 transitions. [2021-02-19 18:51:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:03,100 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:03,100 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:03,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:03,301 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:03,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1499349735, now seen corresponding path program 73 times [2021-02-19 18:51:03,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:03,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720541234] [2021-02-19 18:51:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:03,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720541234] [2021-02-19 18:51:03,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097533958] [2021-02-19 18:51:03,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:03,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:03,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:03,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:03,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:03,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:03,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-02-19 18:51:03,998 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_119], 2=[B]} [2021-02-19 18:51:04,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:51:04,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:04,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:04,019 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 18 treesize of output 14 [2021-02-19 18:51:04,022 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:04,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:04,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:04,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:04,039 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 33 treesize of output 21 [2021-02-19 18:51:04,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:04,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:04,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:04,052 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:51:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:04,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:04,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:04,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171782794] [2021-02-19 18:51:04,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:04,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:04,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:04,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:04,087 INFO L87 Difference]: Start difference. First operand 9432 states and 34842 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:05,049 INFO L93 Difference]: Finished difference Result 13114 states and 47300 transitions. [2021-02-19 18:51:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:51:05,049 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:51:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:05,082 INFO L225 Difference]: With dead ends: 13114 [2021-02-19 18:51:05,082 INFO L226 Difference]: Without dead ends: 13088 [2021-02-19 18:51:05,083 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:51:05,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-02-19 18:51:05,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 9432. [2021-02-19 18:51:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9432 states, 9431 states have (on average 3.69441204538225) internal successors, (34842), 9431 states have internal predecessors, (34842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:05,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9432 states to 9432 states and 34842 transitions. [2021-02-19 18:51:05,274 INFO L78 Accepts]: Start accepts. Automaton has 9432 states and 34842 transitions. Word has length 28 [2021-02-19 18:51:05,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:05,274 INFO L480 AbstractCegarLoop]: Abstraction has 9432 states and 34842 transitions. [2021-02-19 18:51:05,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:05,274 INFO L276 IsEmpty]: Start isEmpty. Operand 9432 states and 34842 transitions. [2021-02-19 18:51:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:05,292 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:05,292 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:05,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:05,493 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:05,494 INFO L82 PathProgramCache]: Analyzing trace with hash 252051371, now seen corresponding path program 74 times [2021-02-19 18:51:05,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:05,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070799447] [2021-02-19 18:51:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:05,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070799447] [2021-02-19 18:51:05,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863705718] [2021-02-19 18:51:05,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:05,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:05,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:05,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:05,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:05,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:51:05,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:05,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:05,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:05,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:52 [2021-02-19 18:51:05,944 INFO L446 ElimStorePlain]: Different costs {0=[v_C_121], 2=[B]} [2021-02-19 18:51:05,948 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 24 treesize of output 20 [2021-02-19 18:51:05,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:05,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:05,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:05,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:05,972 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 39 treesize of output 27 [2021-02-19 18:51:05,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:05,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:05,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:05,989 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-02-19 18:51:06,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:51:06,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:06,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:06,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:06,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:51:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:06,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:06,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:06,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649740573] [2021-02-19 18:51:06,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:06,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:06,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:06,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:06,067 INFO L87 Difference]: Start difference. First operand 9432 states and 34842 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:06,792 INFO L93 Difference]: Finished difference Result 12119 states and 43928 transitions. [2021-02-19 18:51:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:51:06,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:51:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:06,822 INFO L225 Difference]: With dead ends: 12119 [2021-02-19 18:51:06,822 INFO L226 Difference]: Without dead ends: 12104 [2021-02-19 18:51:06,822 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:51:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12104 states. [2021-02-19 18:51:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12104 to 9418. [2021-02-19 18:51:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9418 states, 9417 states have (on average 3.6971434639481786) internal successors, (34816), 9417 states have internal predecessors, (34816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9418 states to 9418 states and 34816 transitions. [2021-02-19 18:51:07,002 INFO L78 Accepts]: Start accepts. Automaton has 9418 states and 34816 transitions. Word has length 28 [2021-02-19 18:51:07,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:07,002 INFO L480 AbstractCegarLoop]: Abstraction has 9418 states and 34816 transitions. [2021-02-19 18:51:07,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 9418 states and 34816 transitions. [2021-02-19 18:51:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:07,020 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:07,020 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:07,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:07,220 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:07,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1739660455, now seen corresponding path program 75 times [2021-02-19 18:51:07,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:07,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522131606] [2021-02-19 18:51:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:07,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522131606] [2021-02-19 18:51:07,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102718574] [2021-02-19 18:51:07,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:51:07,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:51:07,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:07,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:51:07,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:07,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:51:07,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:07,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:07,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:07,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:58 [2021-02-19 18:51:07,908 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_123], 2=[B]} [2021-02-19 18:51:07,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:51:07,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:07,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:07,932 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 18 treesize of output 14 [2021-02-19 18:51:07,936 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:07,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:07,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:07,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:07,954 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 37 treesize of output 21 [2021-02-19 18:51:07,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:07,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:07,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:07,968 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:11 [2021-02-19 18:51:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:07,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:07,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:07,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204350367] [2021-02-19 18:51:07,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:07,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:07,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:07,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:07,998 INFO L87 Difference]: Start difference. First operand 9418 states and 34816 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) 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) [2021-02-19 18:51:08,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:08,988 INFO L93 Difference]: Finished difference Result 12115 states and 43933 transitions. [2021-02-19 18:51:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:51:08,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) 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 [2021-02-19 18:51:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:09,020 INFO L225 Difference]: With dead ends: 12115 [2021-02-19 18:51:09,020 INFO L226 Difference]: Without dead ends: 12100 [2021-02-19 18:51:09,021 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:51:09,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12100 states. [2021-02-19 18:51:09,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12100 to 9448. [2021-02-19 18:51:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9448 states, 9447 states have (on average 3.6955647295437704) internal successors, (34912), 9447 states have internal predecessors, (34912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9448 states to 9448 states and 34912 transitions. [2021-02-19 18:51:09,312 INFO L78 Accepts]: Start accepts. Automaton has 9448 states and 34912 transitions. Word has length 28 [2021-02-19 18:51:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:09,312 INFO L480 AbstractCegarLoop]: Abstraction has 9448 states and 34912 transitions. [2021-02-19 18:51:09,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) 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) [2021-02-19 18:51:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 9448 states and 34912 transitions. [2021-02-19 18:51:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:09,332 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:09,332 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:09,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-02-19 18:51:09,532 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:09,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:09,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1487432277, now seen corresponding path program 76 times [2021-02-19 18:51:09,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:09,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459297127] [2021-02-19 18:51:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:09,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459297127] [2021-02-19 18:51:09,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189351459] [2021-02-19 18:51:09,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:09,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:09,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:09,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:09,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:09,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:09,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:09,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:09,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:09,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-02-19 18:51:10,028 INFO L446 ElimStorePlain]: Different costs {0=[v_C_125], 2=[B]} [2021-02-19 18:51:10,031 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 24 treesize of output 20 [2021-02-19 18:51:10,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:10,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:10,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:10,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:10,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-02-19 18:51:10,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:10,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:10,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:10,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-02-19 18:51:10,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:51:10,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:10,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:10,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:10,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:51:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:10,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:10,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:10,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662949868] [2021-02-19 18:51:10,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:10,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:10,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:10,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:10,128 INFO L87 Difference]: Start difference. First operand 9448 states and 34912 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:11,071 INFO L93 Difference]: Finished difference Result 12186 states and 44143 transitions. [2021-02-19 18:51:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:51:11,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:51:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:11,103 INFO L225 Difference]: With dead ends: 12186 [2021-02-19 18:51:11,103 INFO L226 Difference]: Without dead ends: 12164 [2021-02-19 18:51:11,104 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:51:11,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12164 states. [2021-02-19 18:51:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12164 to 9455. [2021-02-19 18:51:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9455 states, 9454 states have (on average 3.696001692405331) internal successors, (34942), 9454 states have internal predecessors, (34942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9455 states to 9455 states and 34942 transitions. [2021-02-19 18:51:11,271 INFO L78 Accepts]: Start accepts. Automaton has 9455 states and 34942 transitions. Word has length 28 [2021-02-19 18:51:11,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:11,272 INFO L480 AbstractCegarLoop]: Abstraction has 9455 states and 34942 transitions. [2021-02-19 18:51:11,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:11,272 INFO L276 IsEmpty]: Start isEmpty. Operand 9455 states and 34942 transitions. [2021-02-19 18:51:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:11,288 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:11,288 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:11,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-02-19 18:51:11,488 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1150268587, now seen corresponding path program 77 times [2021-02-19 18:51:11,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:11,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046490823] [2021-02-19 18:51:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:11,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046490823] [2021-02-19 18:51:11,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712078125] [2021-02-19 18:51:11,774 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 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 [2021-02-19 18:51:11,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:51:11,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:11,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:11,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:11,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:11,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:11,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-02-19 18:51:11,984 INFO L446 ElimStorePlain]: Different costs {0=[v_C_127], 2=[B]} [2021-02-19 18:51:11,988 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 24 treesize of output 20 [2021-02-19 18:51:11,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:12,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:12,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:12,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:12,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-02-19 18:51:12,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:12,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:12,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:12,031 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:27 [2021-02-19 18:51:12,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:51:12,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:12,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:12,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:12,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:51:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:12,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:12,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:12,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376986373] [2021-02-19 18:51:12,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:12,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:12,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:12,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:12,142 INFO L87 Difference]: Start difference. First operand 9455 states and 34942 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:12,880 INFO L93 Difference]: Finished difference Result 12206 states and 44228 transitions. [2021-02-19 18:51:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:51:12,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:51:12,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:12,907 INFO L225 Difference]: With dead ends: 12206 [2021-02-19 18:51:12,907 INFO L226 Difference]: Without dead ends: 12191 [2021-02-19 18:51:12,907 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:51:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12191 states. [2021-02-19 18:51:13,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12191 to 9479. [2021-02-19 18:51:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9479 states, 9478 states have (on average 3.6948723359358513) internal successors, (35020), 9478 states have internal predecessors, (35020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9479 states to 9479 states and 35020 transitions. [2021-02-19 18:51:13,077 INFO L78 Accepts]: Start accepts. Automaton has 9479 states and 35020 transitions. Word has length 28 [2021-02-19 18:51:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:13,077 INFO L480 AbstractCegarLoop]: Abstraction has 9479 states and 35020 transitions. [2021-02-19 18:51:13,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 9479 states and 35020 transitions. [2021-02-19 18:51:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:13,094 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:13,094 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:13,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:13,295 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:13,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:13,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1107488395, now seen corresponding path program 78 times [2021-02-19 18:51:13,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:13,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424256949] [2021-02-19 18:51:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:13,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424256949] [2021-02-19 18:51:13,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719601926] [2021-02-19 18:51:13,639 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 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 [2021-02-19 18:51:13,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:51:13,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:13,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:51:13,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:13,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:13,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:13,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:13,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:13,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-02-19 18:51:14,045 INFO L446 ElimStorePlain]: Different costs {0=[v_C_129], 2=[A, B]} [2021-02-19 18:51:14,049 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 24 treesize of output 20 [2021-02-19 18:51:14,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:14,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:14,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:14,088 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 30 treesize of output 38 [2021-02-19 18:51:14,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:51:14,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:14,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:14,143 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 61 treesize of output 61 [2021-02-19 18:51:14,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-02-19 18:51:14,222 INFO L628 ElimStorePlain]: treesize reduction 47, result has 46.6 percent of original size [2021-02-19 18:51:14,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:14,230 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:82 [2021-02-19 18:51:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:14,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:14,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-02-19 18:51:14,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299427429] [2021-02-19 18:51:14,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:51:14,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:14,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:51:14,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:51:14,341 INFO L87 Difference]: Start difference. First operand 9479 states and 35020 transitions. Second operand has 20 states, 20 states have (on average 2.25) 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) [2021-02-19 18:51:17,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:17,151 INFO L93 Difference]: Finished difference Result 12304 states and 44443 transitions. [2021-02-19 18:51:17,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:51:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) 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 28 [2021-02-19 18:51:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:17,179 INFO L225 Difference]: With dead ends: 12304 [2021-02-19 18:51:17,179 INFO L226 Difference]: Without dead ends: 12212 [2021-02-19 18:51:17,179 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=234, Invalid=1836, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:51:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12212 states. [2021-02-19 18:51:17,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12212 to 9512. [2021-02-19 18:51:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9512 states, 9511 states have (on average 3.6929870676059298) internal successors, (35124), 9511 states have internal predecessors, (35124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9512 states to 9512 states and 35124 transitions. [2021-02-19 18:51:17,319 INFO L78 Accepts]: Start accepts. Automaton has 9512 states and 35124 transitions. Word has length 28 [2021-02-19 18:51:17,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:17,320 INFO L480 AbstractCegarLoop]: Abstraction has 9512 states and 35124 transitions. [2021-02-19 18:51:17,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) 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) [2021-02-19 18:51:17,320 INFO L276 IsEmpty]: Start isEmpty. Operand 9512 states and 35124 transitions. [2021-02-19 18:51:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:17,333 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:17,333 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:17,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-02-19 18:51:17,533 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:17,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:17,534 INFO L82 PathProgramCache]: Analyzing trace with hash -920909621, now seen corresponding path program 79 times [2021-02-19 18:51:17,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:17,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365232165] [2021-02-19 18:51:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:17,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365232165] [2021-02-19 18:51:17,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250689960] [2021-02-19 18:51:17,792 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 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 [2021-02-19 18:51:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:17,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:17,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:17,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:17,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:17,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:17,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:17,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-02-19 18:51:17,970 INFO L446 ElimStorePlain]: Different costs {0=[v_C_131], 1=[A]} [2021-02-19 18:51:17,973 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 32 treesize of output 24 [2021-02-19 18:51:17,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:17,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:17,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:17,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 18:51:17,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:17,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:17,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:17,993 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:23 [2021-02-19 18:51:18,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:51:18,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:18,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:18,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:18,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:51:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:18,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:18,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:51:18,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756315938] [2021-02-19 18:51:18,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:51:18,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:18,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:51:18,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:51:18,049 INFO L87 Difference]: Start difference. First operand 9512 states and 35124 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-02-19 18:51:18,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:18,521 INFO L93 Difference]: Finished difference Result 9657 states and 35553 transitions. [2021-02-19 18:51:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:51:18,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-02-19 18:51:18,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:18,539 INFO L225 Difference]: With dead ends: 9657 [2021-02-19 18:51:18,540 INFO L226 Difference]: Without dead ends: 9642 [2021-02-19 18:51:18,540 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9642 states. [2021-02-19 18:51:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9642 to 9518. [2021-02-19 18:51:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9518 states, 9517 states have (on average 3.6927603236313966) internal successors, (35144), 9517 states have internal predecessors, (35144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9518 states to 9518 states and 35144 transitions. [2021-02-19 18:51:18,677 INFO L78 Accepts]: Start accepts. Automaton has 9518 states and 35144 transitions. Word has length 28 [2021-02-19 18:51:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:18,677 INFO L480 AbstractCegarLoop]: Abstraction has 9518 states and 35144 transitions. [2021-02-19 18:51:18,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-02-19 18:51:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 9518 states and 35144 transitions. [2021-02-19 18:51:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:18,691 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:18,691 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:18,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-02-19 18:51:18,891 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:18,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:18,892 INFO L82 PathProgramCache]: Analyzing trace with hash 899155111, now seen corresponding path program 80 times [2021-02-19 18:51:18,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:18,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342710815] [2021-02-19 18:51:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:19,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342710815] [2021-02-19 18:51:19,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150543909] [2021-02-19 18:51:19,237 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 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 [2021-02-19 18:51:19,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:19,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:19,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:19,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:19,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:51:19,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:19,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:19,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:19,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-02-19 18:51:19,527 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_133], 2=[B]} [2021-02-19 18:51:19,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:51:19,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:19,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:19,543 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 18 treesize of output 14 [2021-02-19 18:51:19,545 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:19,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:19,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:19,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:19,558 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 33 treesize of output 21 [2021-02-19 18:51:19,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:19,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:19,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:19,567 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-02-19 18:51:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:19,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:19,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:19,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40357230] [2021-02-19 18:51:19,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:19,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:19,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:19,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:19,590 INFO L87 Difference]: Start difference. First operand 9518 states and 35144 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) 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) [2021-02-19 18:51:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:20,427 INFO L93 Difference]: Finished difference Result 12180 states and 44108 transitions. [2021-02-19 18:51:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:51:20,428 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) 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 [2021-02-19 18:51:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:20,451 INFO L225 Difference]: With dead ends: 12180 [2021-02-19 18:51:20,451 INFO L226 Difference]: Without dead ends: 12117 [2021-02-19 18:51:20,451 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:51:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12117 states. [2021-02-19 18:51:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12117 to 9541. [2021-02-19 18:51:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9541 states, 9540 states have (on average 3.690251572327044) internal successors, (35205), 9540 states have internal predecessors, (35205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9541 states to 9541 states and 35205 transitions. [2021-02-19 18:51:20,666 INFO L78 Accepts]: Start accepts. Automaton has 9541 states and 35205 transitions. Word has length 28 [2021-02-19 18:51:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:20,666 INFO L480 AbstractCegarLoop]: Abstraction has 9541 states and 35205 transitions. [2021-02-19 18:51:20,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) 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) [2021-02-19 18:51:20,667 INFO L276 IsEmpty]: Start isEmpty. Operand 9541 states and 35205 transitions. [2021-02-19 18:51:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:20,680 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:20,680 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:20,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-02-19 18:51:20,881 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:20,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1030119467, now seen corresponding path program 81 times [2021-02-19 18:51:20,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:20,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841506309] [2021-02-19 18:51:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:21,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841506309] [2021-02-19 18:51:21,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987555448] [2021-02-19 18:51:21,199 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 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 [2021-02-19 18:51:21,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:51:21,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:21,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:21,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:21,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:21,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:21,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:21,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:21,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-02-19 18:51:21,420 INFO L446 ElimStorePlain]: Different costs {0=[v_C_135], 2=[B]} [2021-02-19 18:51:21,423 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 24 treesize of output 20 [2021-02-19 18:51:21,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:21,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:21,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:21,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:21,442 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 39 treesize of output 27 [2021-02-19 18:51:21,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:21,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:21,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:21,456 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-02-19 18:51:21,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:51:21,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:21,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:21,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:21,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:51:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:21,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:21,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:21,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212932037] [2021-02-19 18:51:21,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:21,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:21,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:21,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:21,515 INFO L87 Difference]: Start difference. First operand 9541 states and 35205 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:22,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:22,133 INFO L93 Difference]: Finished difference Result 12209 states and 44193 transitions. [2021-02-19 18:51:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:51:22,133 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:51:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:22,155 INFO L225 Difference]: With dead ends: 12209 [2021-02-19 18:51:22,155 INFO L226 Difference]: Without dead ends: 12170 [2021-02-19 18:51:22,156 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:51:22,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2021-02-19 18:51:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 9536. [2021-02-19 18:51:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9536 states, 9535 states have (on average 3.6914525432616676) internal successors, (35198), 9535 states have internal predecessors, (35198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9536 states to 9536 states and 35198 transitions. [2021-02-19 18:51:22,307 INFO L78 Accepts]: Start accepts. Automaton has 9536 states and 35198 transitions. Word has length 28 [2021-02-19 18:51:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:22,307 INFO L480 AbstractCegarLoop]: Abstraction has 9536 states and 35198 transitions. [2021-02-19 18:51:22,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 9536 states and 35198 transitions. [2021-02-19 18:51:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:22,322 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:22,322 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:22,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-02-19 18:51:22,523 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:22,523 INFO L82 PathProgramCache]: Analyzing trace with hash 496084555, now seen corresponding path program 82 times [2021-02-19 18:51:22,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:22,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271475204] [2021-02-19 18:51:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:22,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271475204] [2021-02-19 18:51:22,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126152825] [2021-02-19 18:51:22,790 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 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 [2021-02-19 18:51:22,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:22,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:22,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:22,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:22,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:51:22,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:22,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:22,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:22,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-02-19 18:51:22,945 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 24 treesize of output 20 [2021-02-19 18:51:22,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:22,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:22,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:22,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:40 [2021-02-19 18:51:22,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:51:22,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:23,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:23,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:23,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-02-19 18:51:23,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:23,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:23,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-02-19 18:51:23,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:23,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:23,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:23,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-02-19 18:51:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:23,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:23,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:23,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349167173] [2021-02-19 18:51:23,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:23,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:23,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:23,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:23,097 INFO L87 Difference]: Start difference. First operand 9536 states and 35198 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:23,603 INFO L93 Difference]: Finished difference Result 9693 states and 35642 transitions. [2021-02-19 18:51:23,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:51:23,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:51:23,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:23,620 INFO L225 Difference]: With dead ends: 9693 [2021-02-19 18:51:23,621 INFO L226 Difference]: Without dead ends: 9671 [2021-02-19 18:51:23,621 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:51:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9671 states. [2021-02-19 18:51:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9671 to 9551. [2021-02-19 18:51:23,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9551 states, 9550 states have (on average 3.6910994764397906) internal successors, (35250), 9550 states have internal predecessors, (35250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9551 states to 9551 states and 35250 transitions. [2021-02-19 18:51:23,753 INFO L78 Accepts]: Start accepts. Automaton has 9551 states and 35250 transitions. Word has length 28 [2021-02-19 18:51:23,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:23,753 INFO L480 AbstractCegarLoop]: Abstraction has 9551 states and 35250 transitions. [2021-02-19 18:51:23,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 9551 states and 35250 transitions. [2021-02-19 18:51:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:23,768 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:23,768 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:23,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-02-19 18:51:23,969 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:23,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1483576167, now seen corresponding path program 83 times [2021-02-19 18:51:23,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:23,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641786312] [2021-02-19 18:51:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:24,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641786312] [2021-02-19 18:51:24,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139553378] [2021-02-19 18:51:24,245 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 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 [2021-02-19 18:51:24,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:51:24,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:24,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:24,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:24,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:24,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:24,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:24,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:24,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-02-19 18:51:24,404 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 24 treesize of output 20 [2021-02-19 18:51:24,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:24,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:24,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:24,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:50 [2021-02-19 18:51:24,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:24,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:24,454 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 40 treesize of output 28 [2021-02-19 18:51:24,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:24,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:24,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:24,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:37 [2021-02-19 18:51:24,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:51:24,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:24,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:24,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:24,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:51:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:24,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:24,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:24,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922916694] [2021-02-19 18:51:24,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:24,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:24,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:24,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:24,530 INFO L87 Difference]: Start difference. First operand 9551 states and 35250 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) 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) [2021-02-19 18:51:24,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:24,982 INFO L93 Difference]: Finished difference Result 9697 states and 35643 transitions. [2021-02-19 18:51:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:51:24,983 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) 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 [2021-02-19 18:51:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:25,000 INFO L225 Difference]: With dead ends: 9697 [2021-02-19 18:51:25,000 INFO L226 Difference]: Without dead ends: 9660 [2021-02-19 18:51:25,001 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:51:25,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9660 states. [2021-02-19 18:51:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9660 to 9550. [2021-02-19 18:51:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9550 states, 9549 states have (on average 3.6923238035396375) internal successors, (35258), 9549 states have internal predecessors, (35258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9550 states to 9550 states and 35258 transitions. [2021-02-19 18:51:25,172 INFO L78 Accepts]: Start accepts. Automaton has 9550 states and 35258 transitions. Word has length 28 [2021-02-19 18:51:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:25,173 INFO L480 AbstractCegarLoop]: Abstraction has 9550 states and 35258 transitions. [2021-02-19 18:51:25,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) 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) [2021-02-19 18:51:25,173 INFO L276 IsEmpty]: Start isEmpty. Operand 9550 states and 35258 transitions. [2021-02-19 18:51:25,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:25,185 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:25,186 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:25,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:25,386 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:25,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:25,386 INFO L82 PathProgramCache]: Analyzing trace with hash 540981987, now seen corresponding path program 84 times [2021-02-19 18:51:25,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:25,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356764864] [2021-02-19 18:51:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:25,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356764864] [2021-02-19 18:51:25,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585912519] [2021-02-19 18:51:25,658 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 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 [2021-02-19 18:51:25,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:51:25,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:25,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:51:25,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:25,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:51:25,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:25,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:25,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:25,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-02-19 18:51:25,966 INFO L446 ElimStorePlain]: Different costs {0=[v_C_141], 2=[A], 3=[B]} [2021-02-19 18:51:25,969 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 24 treesize of output 20 [2021-02-19 18:51:25,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:25,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:26,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:26,004 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 33 [2021-02-19 18:51:26,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:51:26,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:26,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:26,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:26,050 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 70 treesize of output 66 [2021-02-19 18:51:26,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-02-19 18:51:26,146 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-02-19 18:51:26,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:26,154 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:68, output treesize:43 [2021-02-19 18:51:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:26,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:26,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-02-19 18:51:26,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433414614] [2021-02-19 18:51:26,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:51:26,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:26,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:51:26,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:26,222 INFO L87 Difference]: Start difference. First operand 9550 states and 35258 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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) [2021-02-19 18:51:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:27,611 INFO L93 Difference]: Finished difference Result 12346 states and 44647 transitions. [2021-02-19 18:51:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:51:27,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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 [2021-02-19 18:51:27,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:27,634 INFO L225 Difference]: With dead ends: 12346 [2021-02-19 18:51:27,634 INFO L226 Difference]: Without dead ends: 12283 [2021-02-19 18:51:27,634 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:51:27,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12283 states. [2021-02-19 18:51:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12283 to 9576. [2021-02-19 18:51:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9576 states, 9575 states have (on average 3.6908616187989556) internal successors, (35340), 9575 states have internal predecessors, (35340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 35340 transitions. [2021-02-19 18:51:27,777 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 35340 transitions. Word has length 28 [2021-02-19 18:51:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:27,777 INFO L480 AbstractCegarLoop]: Abstraction has 9576 states and 35340 transitions. [2021-02-19 18:51:27,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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) [2021-02-19 18:51:27,777 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 35340 transitions. [2021-02-19 18:51:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:27,790 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:27,790 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:27,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-02-19 18:51:27,991 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:27,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:27,991 INFO L82 PathProgramCache]: Analyzing trace with hash 671946343, now seen corresponding path program 85 times [2021-02-19 18:51:27,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:27,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536395162] [2021-02-19 18:51:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:28,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536395162] [2021-02-19 18:51:28,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144019576] [2021-02-19 18:51:28,248 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 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 [2021-02-19 18:51:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:28,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:28,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:51:28,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:28,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:28,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:28,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-02-19 18:51:28,444 INFO L446 ElimStorePlain]: Different costs {0=[v_C_143], 2=[B]} [2021-02-19 18:51:28,447 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 24 treesize of output 20 [2021-02-19 18:51:28,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:28,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:28,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:28,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:28,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-02-19 18:51:28,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:28,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:28,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:28,478 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-02-19 18:51:28,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:51:28,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:28,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:28,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:28,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:51:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:28,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:28,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:28,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149105264] [2021-02-19 18:51:28,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:28,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:28,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:28,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:28,538 INFO L87 Difference]: Start difference. First operand 9576 states and 35340 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:29,198 INFO L93 Difference]: Finished difference Result 12281 states and 44443 transitions. [2021-02-19 18:51:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:51:29,198 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:51:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:29,220 INFO L225 Difference]: With dead ends: 12281 [2021-02-19 18:51:29,221 INFO L226 Difference]: Without dead ends: 12250 [2021-02-19 18:51:29,221 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:51:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12250 states. [2021-02-19 18:51:29,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12250 to 9571. [2021-02-19 18:51:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9571 states, 9570 states have (on average 3.69226750261233) internal successors, (35335), 9570 states have internal predecessors, (35335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9571 states to 9571 states and 35335 transitions. [2021-02-19 18:51:29,360 INFO L78 Accepts]: Start accepts. Automaton has 9571 states and 35335 transitions. Word has length 28 [2021-02-19 18:51:29,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:29,360 INFO L480 AbstractCegarLoop]: Abstraction has 9571 states and 35335 transitions. [2021-02-19 18:51:29,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:29,361 INFO L276 IsEmpty]: Start isEmpty. Operand 9571 states and 35335 transitions. [2021-02-19 18:51:29,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:29,374 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:29,374 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:29,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:29,574 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:29,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:29,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1278464921, now seen corresponding path program 86 times [2021-02-19 18:51:29,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:29,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151357059] [2021-02-19 18:51:29,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:29,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151357059] [2021-02-19 18:51:29,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789708872] [2021-02-19 18:51:29,848 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 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 [2021-02-19 18:51:29,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:29,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:29,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:29,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:29,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:29,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:29,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:29,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:29,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-02-19 18:51:30,075 INFO L446 ElimStorePlain]: Different costs {0=[v_C_145], 2=[B]} [2021-02-19 18:51:30,078 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 24 treesize of output 20 [2021-02-19 18:51:30,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:30,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:30,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:30,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:30,096 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 34 treesize of output 22 [2021-02-19 18:51:30,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:30,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:30,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:30,109 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:27 [2021-02-19 18:51:30,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:51:30,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:30,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:30,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:30,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:51:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:30,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:30,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:30,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171691098] [2021-02-19 18:51:30,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:30,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:30,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:30,197 INFO L87 Difference]: Start difference. First operand 9571 states and 35335 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:30,988 INFO L93 Difference]: Finished difference Result 12302 states and 44530 transitions. [2021-02-19 18:51:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:51:30,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 [2021-02-19 18:51:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:31,013 INFO L225 Difference]: With dead ends: 12302 [2021-02-19 18:51:31,013 INFO L226 Difference]: Without dead ends: 12274 [2021-02-19 18:51:31,013 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:51:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12274 states. [2021-02-19 18:51:31,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12274 to 9583. [2021-02-19 18:51:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9583 states, 9582 states have (on average 3.6918179920684615) internal successors, (35375), 9582 states have internal predecessors, (35375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9583 states to 9583 states and 35375 transitions. [2021-02-19 18:51:31,169 INFO L78 Accepts]: Start accepts. Automaton has 9583 states and 35375 transitions. Word has length 28 [2021-02-19 18:51:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:31,169 INFO L480 AbstractCegarLoop]: Abstraction has 9583 states and 35375 transitions. [2021-02-19 18:51:31,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-02-19 18:51:31,169 INFO L276 IsEmpty]: Start isEmpty. Operand 9583 states and 35375 transitions. [2021-02-19 18:51:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:31,182 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:31,182 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:31,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:31,383 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:31,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:31,383 INFO L82 PathProgramCache]: Analyzing trace with hash -479123637, now seen corresponding path program 87 times [2021-02-19 18:51:31,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:31,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485606795] [2021-02-19 18:51:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:31,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485606795] [2021-02-19 18:51:31,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811287338] [2021-02-19 18:51:31,650 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 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 [2021-02-19 18:51:31,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:51:31,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:31,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:51:31,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:31,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:51:31,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:31,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:31,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:31,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-02-19 18:51:31,807 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 24 treesize of output 20 [2021-02-19 18:51:31,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:31,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:31,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:31,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:59 [2021-02-19 18:51:31,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:31,946 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 25 treesize of output 41 [2021-02-19 18:51:31,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:51:31,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:32,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:32,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:200 [2021-02-19 18:51:32,358 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-02-19 18:51:32,470 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_24], 3=[B, v_prenex_26]} [2021-02-19 18:51:32,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:32,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-02-19 18:51:32,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:32,572 INFO L628 ElimStorePlain]: treesize reduction 3, result has 97.6 percent of original size [2021-02-19 18:51:32,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:32,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:32,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:32,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-02-19 18:51:32,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:51:32,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:32,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:32,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-02-19 18:51:32,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 18:51:32,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:32,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 18:51:32,699 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:142, output treesize:94 [2021-02-19 18:51:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:32,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:32,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-02-19 18:51:32,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841582154] [2021-02-19 18:51:32,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:51:32,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:32,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:51:32,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:51:32,823 INFO L87 Difference]: Start difference. First operand 9583 states and 35375 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) [2021-02-19 18:51:33,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:33,967 INFO L93 Difference]: Finished difference Result 9684 states and 35656 transitions. [2021-02-19 18:51:33,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:51:33,968 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 28 [2021-02-19 18:51:33,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:33,985 INFO L225 Difference]: With dead ends: 9684 [2021-02-19 18:51:33,985 INFO L226 Difference]: Without dead ends: 9669 [2021-02-19 18:51:33,985 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:51:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9669 states. [2021-02-19 18:51:34,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9669 to 9598. [2021-02-19 18:51:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9598 states, 9597 states have (on average 3.6910492862352817) internal successors, (35423), 9597 states have internal predecessors, (35423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9598 states to 9598 states and 35423 transitions. [2021-02-19 18:51:34,114 INFO L78 Accepts]: Start accepts. Automaton has 9598 states and 35423 transitions. Word has length 28 [2021-02-19 18:51:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:34,114 INFO L480 AbstractCegarLoop]: Abstraction has 9598 states and 35423 transitions. [2021-02-19 18:51:34,114 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) [2021-02-19 18:51:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 9598 states and 35423 transitions. [2021-02-19 18:51:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:34,126 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:34,126 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:34,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:34,327 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:34,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2096656417, now seen corresponding path program 88 times [2021-02-19 18:51:34,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:34,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608217706] [2021-02-19 18:51:34,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:34,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608217706] [2021-02-19 18:51:34,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175538999] [2021-02-19 18:51:34,612 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 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 [2021-02-19 18:51:34,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:34,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:34,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:34,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:34,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:34,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:34,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:34,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:34,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-02-19 18:51:34,735 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 24 treesize of output 20 [2021-02-19 18:51:34,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:34,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:34,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:34,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:46 [2021-02-19 18:51:34,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:51:34,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:34,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:34,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:34,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-02-19 18:51:34,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:34,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:34,922 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 29 treesize of output 17 [2021-02-19 18:51:34,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:34,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:34,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:34,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-02-19 18:51:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:34,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:34,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:34,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530112763] [2021-02-19 18:51:34,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:34,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:34,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:34,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:34,964 INFO L87 Difference]: Start difference. First operand 9598 states and 35423 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) 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) [2021-02-19 18:51:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:35,619 INFO L93 Difference]: Finished difference Result 9797 states and 36005 transitions. [2021-02-19 18:51:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:51:35,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) 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 [2021-02-19 18:51:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:35,636 INFO L225 Difference]: With dead ends: 9797 [2021-02-19 18:51:35,636 INFO L226 Difference]: Without dead ends: 9782 [2021-02-19 18:51:35,637 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9782 states. [2021-02-19 18:51:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9782 to 9607. [2021-02-19 18:51:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9607 states, 9606 states have (on average 3.6900895273787215) internal successors, (35447), 9606 states have internal predecessors, (35447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9607 states to 9607 states and 35447 transitions. [2021-02-19 18:51:35,762 INFO L78 Accepts]: Start accepts. Automaton has 9607 states and 35447 transitions. Word has length 28 [2021-02-19 18:51:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:35,762 INFO L480 AbstractCegarLoop]: Abstraction has 9607 states and 35447 transitions. [2021-02-19 18:51:35,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) 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) [2021-02-19 18:51:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 9607 states and 35447 transitions. [2021-02-19 18:51:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:35,775 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:35,775 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:35,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:35,976 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:35,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:35,976 INFO L82 PathProgramCache]: Analyzing trace with hash 508367975, now seen corresponding path program 89 times [2021-02-19 18:51:35,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:35,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810818749] [2021-02-19 18:51:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:36,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810818749] [2021-02-19 18:51:36,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089004005] [2021-02-19 18:51:36,245 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 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 [2021-02-19 18:51:36,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:51:36,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:36,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:36,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:36,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:36,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:36,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:36,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:36,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-02-19 18:51:36,360 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 24 treesize of output 20 [2021-02-19 18:51:36,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:36,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:36,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:36,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:46 [2021-02-19 18:51:36,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:36,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:36,445 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 34 treesize of output 22 [2021-02-19 18:51:36,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:36,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:36,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:36,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:29 [2021-02-19 18:51:36,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:51:36,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:36,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:36,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:36,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:51:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:36,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:36,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:36,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140369602] [2021-02-19 18:51:36,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:36,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:36,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:36,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:36,525 INFO L87 Difference]: Start difference. First operand 9607 states and 35447 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) 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) [2021-02-19 18:51:37,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:37,049 INFO L93 Difference]: Finished difference Result 9753 states and 35856 transitions. [2021-02-19 18:51:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:51:37,049 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) 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 [2021-02-19 18:51:37,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:37,066 INFO L225 Difference]: With dead ends: 9753 [2021-02-19 18:51:37,066 INFO L226 Difference]: Without dead ends: 9728 [2021-02-19 18:51:37,067 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:37,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9728 states. [2021-02-19 18:51:37,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9728 to 9602. [2021-02-19 18:51:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9602 states, 9601 states have (on average 3.6915946255598375) internal successors, (35443), 9601 states have internal predecessors, (35443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9602 states to 9602 states and 35443 transitions. [2021-02-19 18:51:37,199 INFO L78 Accepts]: Start accepts. Automaton has 9602 states and 35443 transitions. Word has length 28 [2021-02-19 18:51:37,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:37,199 INFO L480 AbstractCegarLoop]: Abstraction has 9602 states and 35443 transitions. [2021-02-19 18:51:37,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) 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) [2021-02-19 18:51:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 9602 states and 35443 transitions. [2021-02-19 18:51:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:37,212 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:37,212 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:37,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2021-02-19 18:51:37,413 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1302058589, now seen corresponding path program 90 times [2021-02-19 18:51:37,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:37,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013253786] [2021-02-19 18:51:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:37,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013253786] [2021-02-19 18:51:37,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493071455] [2021-02-19 18:51:37,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:51:37,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:51:37,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:37,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:37,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:37,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:51:37,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:37,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:37,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:37,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-02-19 18:51:37,811 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 24 treesize of output 20 [2021-02-19 18:51:37,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:37,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:37,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:37,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:46 [2021-02-19 18:51:37,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:37,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:37,865 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 36 treesize of output 24 [2021-02-19 18:51:37,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:37,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:37,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:37,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:31 [2021-02-19 18:51:37,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-02-19 18:51:37,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:37,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:37,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:37,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-02-19 18:51:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:37,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:37,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-02-19 18:51:37,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534735043] [2021-02-19 18:51:37,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:37,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:37,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:37,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:37,971 INFO L87 Difference]: Start difference. First operand 9602 states and 35443 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) 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) [2021-02-19 18:51:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:38,582 INFO L93 Difference]: Finished difference Result 9755 states and 35896 transitions. [2021-02-19 18:51:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:51:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) 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 [2021-02-19 18:51:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:38,600 INFO L225 Difference]: With dead ends: 9755 [2021-02-19 18:51:38,600 INFO L226 Difference]: Without dead ends: 9740 [2021-02-19 18:51:38,600 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:51:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9740 states. [2021-02-19 18:51:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9740 to 9610. [2021-02-19 18:51:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9610 states, 9609 states have (on average 3.6920595275262773) internal successors, (35477), 9609 states have internal predecessors, (35477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9610 states to 9610 states and 35477 transitions. [2021-02-19 18:51:38,724 INFO L78 Accepts]: Start accepts. Automaton has 9610 states and 35477 transitions. Word has length 28 [2021-02-19 18:51:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:38,724 INFO L480 AbstractCegarLoop]: Abstraction has 9610 states and 35477 transitions. [2021-02-19 18:51:38,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) 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) [2021-02-19 18:51:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 9610 states and 35477 transitions. [2021-02-19 18:51:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:38,737 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:38,737 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:38,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-02-19 18:51:38,938 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:38,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:38,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1935646631, now seen corresponding path program 91 times [2021-02-19 18:51:38,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:38,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323736457] [2021-02-19 18:51:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:39,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323736457] [2021-02-19 18:51:39,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966429183] [2021-02-19 18:51:39,199 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 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 [2021-02-19 18:51:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:39,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:39,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:39,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:39,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:39,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:39,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-02-19 18:51:39,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:51:39,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:39,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:39,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:51:39,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:39,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:39,475 INFO L518 ElimStorePlain]: Eliminatee v_C_155 vanished before elimination [2021-02-19 18:51:39,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:39,475 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-02-19 18:51:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:39,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:39,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:51:39,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094812071] [2021-02-19 18:51:39,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:51:39,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:39,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:51:39,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:51:39,498 INFO L87 Difference]: Start difference. First operand 9610 states and 35477 transitions. Second operand has 16 states, 16 states have (on average 2.75) 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) [2021-02-19 18:51:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:40,209 INFO L93 Difference]: Finished difference Result 10831 states and 38828 transitions. [2021-02-19 18:51:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:51:40,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) 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 [2021-02-19 18:51:40,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:40,231 INFO L225 Difference]: With dead ends: 10831 [2021-02-19 18:51:40,231 INFO L226 Difference]: Without dead ends: 10774 [2021-02-19 18:51:40,231 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:51:40,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10774 states. [2021-02-19 18:51:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10774 to 9584. [2021-02-19 18:51:40,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9584 states, 9583 states have (on average 3.69404153187937) internal successors, (35400), 9583 states have internal predecessors, (35400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9584 states to 9584 states and 35400 transitions. [2021-02-19 18:51:40,373 INFO L78 Accepts]: Start accepts. Automaton has 9584 states and 35400 transitions. Word has length 28 [2021-02-19 18:51:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:40,373 INFO L480 AbstractCegarLoop]: Abstraction has 9584 states and 35400 transitions. [2021-02-19 18:51:40,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) 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) [2021-02-19 18:51:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 9584 states and 35400 transitions. [2021-02-19 18:51:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:40,387 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:40,387 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:40,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-02-19 18:51:40,587 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash -465013749, now seen corresponding path program 92 times [2021-02-19 18:51:40,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:40,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578514589] [2021-02-19 18:51:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:40,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578514589] [2021-02-19 18:51:40,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562847843] [2021-02-19 18:51:40,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:51:40,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:40,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:40,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:51:40,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:40,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:51:40,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:40,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:40,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:40,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:51:41,167 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_157], 2=[B]} [2021-02-19 18:51:41,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:51:41,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:41,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:41,185 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 18 treesize of output 14 [2021-02-19 18:51:41,187 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:41,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:41,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:41,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:41,208 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 24 treesize of output 24 [2021-02-19 18:51:41,210 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:51:41,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:41,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:41,225 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:19 [2021-02-19 18:51:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:41,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:41,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 18:51:41,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441910123] [2021-02-19 18:51:41,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:51:41,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:41,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:51:41,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:51:41,289 INFO L87 Difference]: Start difference. First operand 9584 states and 35400 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:43,838 INFO L93 Difference]: Finished difference Result 11093 states and 39659 transitions. [2021-02-19 18:51:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:51:43,839 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:51:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:43,857 INFO L225 Difference]: With dead ends: 11093 [2021-02-19 18:51:43,857 INFO L226 Difference]: Without dead ends: 11063 [2021-02-19 18:51:43,857 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 18:51:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11063 states. [2021-02-19 18:51:43,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11063 to 9651. [2021-02-19 18:51:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9651 states, 9650 states have (on average 3.6917098445595853) internal successors, (35625), 9650 states have internal predecessors, (35625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9651 states to 9651 states and 35625 transitions. [2021-02-19 18:51:43,996 INFO L78 Accepts]: Start accepts. Automaton has 9651 states and 35625 transitions. Word has length 28 [2021-02-19 18:51:43,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:43,996 INFO L480 AbstractCegarLoop]: Abstraction has 9651 states and 35625 transitions. [2021-02-19 18:51:43,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 9651 states and 35625 transitions. [2021-02-19 18:51:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:44,010 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:44,010 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:44,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-02-19 18:51:44,210 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1093197313, now seen corresponding path program 93 times [2021-02-19 18:51:44,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:44,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089021086] [2021-02-19 18:51:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:44,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089021086] [2021-02-19 18:51:44,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839472165] [2021-02-19 18:51:44,411 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 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 [2021-02-19 18:51:44,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:51:44,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:44,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:51:44,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:44,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:44,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:44,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:44,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:44,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:51:44,923 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_159], 2=[B]} [2021-02-19 18:51:44,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:51:44,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:44,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:44,936 INFO L518 ElimStorePlain]: Eliminatee v_C_159 vanished before elimination [2021-02-19 18:51:44,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:44,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:44,939 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 24 treesize of output 16 [2021-02-19 18:51:44,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:44,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:44,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:44,947 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:5 [2021-02-19 18:51:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:44,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:44,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 18:51:44,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311119688] [2021-02-19 18:51:44,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:51:44,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:44,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:51:44,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:51:44,971 INFO L87 Difference]: Start difference. First operand 9651 states and 35625 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:46,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:46,665 INFO L93 Difference]: Finished difference Result 11133 states and 39888 transitions. [2021-02-19 18:51:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:51:46,666 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:51:46,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:46,685 INFO L225 Difference]: With dead ends: 11133 [2021-02-19 18:51:46,685 INFO L226 Difference]: Without dead ends: 11076 [2021-02-19 18:51:46,686 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=209, Invalid=1351, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:51:46,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2021-02-19 18:51:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 9776. [2021-02-19 18:51:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9776 states, 9775 states have (on average 3.6856265984654732) internal successors, (36027), 9775 states have internal predecessors, (36027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9776 states to 9776 states and 36027 transitions. [2021-02-19 18:51:46,830 INFO L78 Accepts]: Start accepts. Automaton has 9776 states and 36027 transitions. Word has length 28 [2021-02-19 18:51:46,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:46,831 INFO L480 AbstractCegarLoop]: Abstraction has 9776 states and 36027 transitions. [2021-02-19 18:51:46,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 9776 states and 36027 transitions. [2021-02-19 18:51:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:46,844 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:46,844 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:47,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:47,045 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:47,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1801555531, now seen corresponding path program 94 times [2021-02-19 18:51:47,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:47,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076121879] [2021-02-19 18:51:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:47,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076121879] [2021-02-19 18:51:47,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547049646] [2021-02-19 18:51:47,262 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 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 [2021-02-19 18:51:47,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:47,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:47,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:47,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:47,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:47,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:47,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:47,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:47,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:51:47,491 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 24 treesize of output 20 [2021-02-19 18:51:47,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:47,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:47,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-02-19 18:51:47,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:47,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:47,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:47,511 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-02-19 18:51:47,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:51:47,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:47,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:47,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:47,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:51:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:47,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:47,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:51:47,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958275748] [2021-02-19 18:51:47,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:51:47,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:47,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:51:47,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:47,573 INFO L87 Difference]: Start difference. First operand 9776 states and 36027 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) [2021-02-19 18:51:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:49,416 INFO L93 Difference]: Finished difference Result 11293 states and 40293 transitions. [2021-02-19 18:51:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:51:49,417 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 [2021-02-19 18:51:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:49,436 INFO L225 Difference]: With dead ends: 11293 [2021-02-19 18:51:49,436 INFO L226 Difference]: Without dead ends: 11239 [2021-02-19 18:51:49,437 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:51:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11239 states. [2021-02-19 18:51:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11239 to 9770. [2021-02-19 18:51:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9770 states, 9769 states have (on average 3.685331149554714) internal successors, (36002), 9769 states have internal predecessors, (36002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9770 states to 9770 states and 36002 transitions. [2021-02-19 18:51:49,576 INFO L78 Accepts]: Start accepts. Automaton has 9770 states and 36002 transitions. Word has length 28 [2021-02-19 18:51:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:49,576 INFO L480 AbstractCegarLoop]: Abstraction has 9770 states and 36002 transitions. [2021-02-19 18:51:49,576 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) [2021-02-19 18:51:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 9770 states and 36002 transitions. [2021-02-19 18:51:49,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:49,589 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:49,589 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:49,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-02-19 18:51:49,790 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:49,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:49,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1827705013, now seen corresponding path program 95 times [2021-02-19 18:51:49,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:49,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066102483] [2021-02-19 18:51:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:50,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066102483] [2021-02-19 18:51:50,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650548746] [2021-02-19 18:51:50,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:51:50,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:51:50,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:50,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:50,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:50,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:50,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:50,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:50,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:50,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:51:50,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:51:50,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:50,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:50,261 INFO L518 ElimStorePlain]: Eliminatee v_C_163 vanished before elimination [2021-02-19 18:51:50,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:50,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-02-19 18:51:50,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:51:50,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:50,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:50,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:50,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:51:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:50,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:50,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:51:50,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772494959] [2021-02-19 18:51:50,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:51:50,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:50,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:51:50,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:50,343 INFO L87 Difference]: Start difference. First operand 9770 states and 36002 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) [2021-02-19 18:51:51,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:51,884 INFO L93 Difference]: Finished difference Result 11041 states and 39667 transitions. [2021-02-19 18:51:51,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:51:51,885 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 [2021-02-19 18:51:51,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:51,905 INFO L225 Difference]: With dead ends: 11041 [2021-02-19 18:51:51,905 INFO L226 Difference]: Without dead ends: 11011 [2021-02-19 18:51:51,906 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:51:51,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11011 states. [2021-02-19 18:51:52,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11011 to 9793. [2021-02-19 18:51:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9793 states, 9792 states have (on average 3.6852532679738563) internal successors, (36086), 9792 states have internal predecessors, (36086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9793 states to 9793 states and 36086 transitions. [2021-02-19 18:51:52,064 INFO L78 Accepts]: Start accepts. Automaton has 9793 states and 36086 transitions. Word has length 28 [2021-02-19 18:51:52,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:52,065 INFO L480 AbstractCegarLoop]: Abstraction has 9793 states and 36086 transitions. [2021-02-19 18:51:52,065 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) [2021-02-19 18:51:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 9793 states and 36086 transitions. [2021-02-19 18:51:52,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:52,080 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:52,080 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:52,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-02-19 18:51:52,280 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1190163239, now seen corresponding path program 96 times [2021-02-19 18:51:52,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:52,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240870345] [2021-02-19 18:51:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:52,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240870345] [2021-02-19 18:51:52,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706237444] [2021-02-19 18:51:52,507 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 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 [2021-02-19 18:51:52,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:51:52,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:51:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:52,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:51:52,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:52,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:52,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:52,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:51:52,900 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_165], 2=[B]} [2021-02-19 18:51:52,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:51:52,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:52,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:52,915 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 18 treesize of output 14 [2021-02-19 18:51:52,917 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:52,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:52,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:52,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-02-19 18:51:52,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:52,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:52,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:52,944 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:48, output treesize:5 [2021-02-19 18:51:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:52,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:52,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 18:51:52,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286526029] [2021-02-19 18:51:52,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:51:52,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:52,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:51:52,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:51:52,969 INFO L87 Difference]: Start difference. First operand 9793 states and 36086 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:55,042 INFO L93 Difference]: Finished difference Result 11742 states and 41654 transitions. [2021-02-19 18:51:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:51:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:51:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:55,063 INFO L225 Difference]: With dead ends: 11742 [2021-02-19 18:51:55,063 INFO L226 Difference]: Without dead ends: 11717 [2021-02-19 18:51:55,064 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:51:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11717 states. [2021-02-19 18:51:55,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11717 to 9849. [2021-02-19 18:51:55,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9849 states, 9848 states have (on average 3.6819658813972382) internal successors, (36260), 9848 states have internal predecessors, (36260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 36260 transitions. [2021-02-19 18:51:55,215 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 36260 transitions. Word has length 28 [2021-02-19 18:51:55,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:55,215 INFO L480 AbstractCegarLoop]: Abstraction has 9849 states and 36260 transitions. [2021-02-19 18:51:55,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 36260 transitions. [2021-02-19 18:51:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:55,229 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:55,229 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:55,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:55,431 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:55,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1546592995, now seen corresponding path program 97 times [2021-02-19 18:51:55,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:55,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021287954] [2021-02-19 18:51:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:55,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021287954] [2021-02-19 18:51:55,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665123056] [2021-02-19 18:51:55,692 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 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 [2021-02-19 18:51:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:55,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:55,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:55,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:55,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:55,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:55,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:55,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:51:56,021 INFO L446 ElimStorePlain]: Different costs {0=[v_C_167], 6=[A, B]} [2021-02-19 18:51:56,023 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 167 treesize of output 131 [2021-02-19 18:51:56,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:56,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:56,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:56,039 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 29 treesize of output 19 [2021-02-19 18:51:56,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:56,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:56,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:56,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:56,051 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 22 treesize of output 12 [2021-02-19 18:51:56,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:56,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:56,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:56,058 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:167, output treesize:5 [2021-02-19 18:51:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:56,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:56,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:51:56,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25760861] [2021-02-19 18:51:56,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:51:56,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:56,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:51:56,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:56,084 INFO L87 Difference]: Start difference. First operand 9849 states and 36260 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:56,977 INFO L93 Difference]: Finished difference Result 11394 states and 40741 transitions. [2021-02-19 18:51:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:51:56,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:51:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:56,997 INFO L225 Difference]: With dead ends: 11394 [2021-02-19 18:51:56,998 INFO L226 Difference]: Without dead ends: 11369 [2021-02-19 18:51:56,998 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:51:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11369 states. [2021-02-19 18:51:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11369 to 9831. [2021-02-19 18:51:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9831 states, 9830 states have (on average 3.6835198372329603) internal successors, (36209), 9830 states have internal predecessors, (36209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9831 states to 9831 states and 36209 transitions. [2021-02-19 18:51:57,155 INFO L78 Accepts]: Start accepts. Automaton has 9831 states and 36209 transitions. Word has length 28 [2021-02-19 18:51:57,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:57,155 INFO L480 AbstractCegarLoop]: Abstraction has 9831 states and 36209 transitions. [2021-02-19 18:51:57,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 9831 states and 36209 transitions. [2021-02-19 18:51:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:57,168 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:57,169 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:57,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-02-19 18:51:57,370 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:57,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:57,370 INFO L82 PathProgramCache]: Analyzing trace with hash -838234777, now seen corresponding path program 98 times [2021-02-19 18:51:57,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:57,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178039347] [2021-02-19 18:51:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:57,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178039347] [2021-02-19 18:51:57,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929860210] [2021-02-19 18:51:57,635 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 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 [2021-02-19 18:51:57,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:57,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:57,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:51:57,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:57,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:51:57,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:57,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:57,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:57,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:51:57,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:51:57,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:57,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:57,863 INFO L518 ElimStorePlain]: Eliminatee v_C_169 vanished before elimination [2021-02-19 18:51:57,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:57,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-02-19 18:51:57,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:51:57,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:57,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:57,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:57,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:51:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:57,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:57,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:51:57,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147029597] [2021-02-19 18:51:57,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:51:57,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:57,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:51:57,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:57,926 INFO L87 Difference]: Start difference. First operand 9831 states and 36209 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) [2021-02-19 18:51:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:58,617 INFO L93 Difference]: Finished difference Result 11469 states and 41015 transitions. [2021-02-19 18:51:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:51:58,618 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 [2021-02-19 18:51:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:58,636 INFO L225 Difference]: With dead ends: 11469 [2021-02-19 18:51:58,636 INFO L226 Difference]: Without dead ends: 11399 [2021-02-19 18:51:58,636 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:51:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2021-02-19 18:51:58,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 9834. [2021-02-19 18:51:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 3.6837180921387165) internal successors, (36222), 9833 states have internal predecessors, (36222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 36222 transitions. [2021-02-19 18:51:58,789 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 36222 transitions. Word has length 28 [2021-02-19 18:51:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:58,789 INFO L480 AbstractCegarLoop]: Abstraction has 9834 states and 36222 transitions. [2021-02-19 18:51:58,789 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) [2021-02-19 18:51:58,789 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 36222 transitions. [2021-02-19 18:51:58,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:51:58,803 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:58,803 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:59,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:59,004 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:59,004 INFO L82 PathProgramCache]: Analyzing trace with hash 97699239, now seen corresponding path program 99 times [2021-02-19 18:51:59,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:59,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660641139] [2021-02-19 18:51:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:59,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660641139] [2021-02-19 18:51:59,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931150556] [2021-02-19 18:51:59,262 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 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 [2021-02-19 18:51:59,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:51:59,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:59,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:51:59,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:59,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:51:59,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:59,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:59,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:59,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:51:59,800 INFO L446 ElimStorePlain]: Different costs {0=[v_C_171, A], 2=[B]} [2021-02-19 18:51:59,810 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 24 treesize of output 20 [2021-02-19 18:51:59,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:59,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:59,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:51:59,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:59,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:59,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:59,839 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 [2021-02-19 18:51:59,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:59,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:59,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:59,848 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:48, output treesize:5 [2021-02-19 18:51:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:59,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:59,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 18:51:59,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926387861] [2021-02-19 18:51:59,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:51:59,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:59,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:51:59,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:51:59,879 INFO L87 Difference]: Start difference. First operand 9834 states and 36222 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:01,289 INFO L93 Difference]: Finished difference Result 10711 states and 38706 transitions. [2021-02-19 18:52:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:52:01,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:52:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:01,310 INFO L225 Difference]: With dead ends: 10711 [2021-02-19 18:52:01,310 INFO L226 Difference]: Without dead ends: 10681 [2021-02-19 18:52:01,310 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:52:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10681 states. [2021-02-19 18:52:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10681 to 9867. [2021-02-19 18:52:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9867 states, 9866 states have (on average 3.6837624163794853) internal successors, (36344), 9866 states have internal predecessors, (36344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9867 states to 9867 states and 36344 transitions. [2021-02-19 18:52:01,488 INFO L78 Accepts]: Start accepts. Automaton has 9867 states and 36344 transitions. Word has length 28 [2021-02-19 18:52:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:01,488 INFO L480 AbstractCegarLoop]: Abstraction has 9867 states and 36344 transitions. [2021-02-19 18:52:01,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 9867 states and 36344 transitions. [2021-02-19 18:52:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:01,503 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:01,503 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:01,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-02-19 18:52:01,718 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:01,718 INFO L82 PathProgramCache]: Analyzing trace with hash 228663595, now seen corresponding path program 100 times [2021-02-19 18:52:01,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:01,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278731930] [2021-02-19 18:52:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:01,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278731930] [2021-02-19 18:52:01,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648461877] [2021-02-19 18:52:01,963 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 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 [2021-02-19 18:52:01,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:52:01,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:01,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:01,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:02,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:02,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:02,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:02,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:02,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:02,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:52:02,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:02,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:02,211 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 18 treesize of output 14 [2021-02-19 18:52:02,213 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:52:02,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:02,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:02,221 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-02-19 18:52:02,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:02,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:02,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:02,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:02,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:52:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:02,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:02,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:02,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859605877] [2021-02-19 18:52:02,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:02,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:02,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:02,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:02,291 INFO L87 Difference]: Start difference. First operand 9867 states and 36344 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) 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) [2021-02-19 18:52:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:03,290 INFO L93 Difference]: Finished difference Result 11087 states and 39794 transitions. [2021-02-19 18:52:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:52:03,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) 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 [2021-02-19 18:52:03,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:03,310 INFO L225 Difference]: With dead ends: 11087 [2021-02-19 18:52:03,310 INFO L226 Difference]: Without dead ends: 11050 [2021-02-19 18:52:03,310 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:52:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11050 states. [2021-02-19 18:52:03,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11050 to 9898. [2021-02-19 18:52:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9898 states, 9897 states have (on average 3.6839446296857634) internal successors, (36460), 9897 states have internal predecessors, (36460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9898 states to 9898 states and 36460 transitions. [2021-02-19 18:52:03,446 INFO L78 Accepts]: Start accepts. Automaton has 9898 states and 36460 transitions. Word has length 28 [2021-02-19 18:52:03,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:03,446 INFO L480 AbstractCegarLoop]: Abstraction has 9898 states and 36460 transitions. [2021-02-19 18:52:03,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) 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) [2021-02-19 18:52:03,446 INFO L276 IsEmpty]: Start isEmpty. Operand 9898 states and 36460 transitions. [2021-02-19 18:52:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:03,459 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:03,459 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:03,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:03,660 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:03,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:03,660 INFO L82 PathProgramCache]: Analyzing trace with hash -305371317, now seen corresponding path program 101 times [2021-02-19 18:52:03,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:03,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775611322] [2021-02-19 18:52:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:03,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775611322] [2021-02-19 18:52:03,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365968972] [2021-02-19 18:52:03,902 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 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 [2021-02-19 18:52:03,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:52:03,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:03,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:03,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:03,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:52:03,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:03,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:03,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:03,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:52:04,125 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 35 treesize of output 27 [2021-02-19 18:52:04,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:04,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:04,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:04,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:51 [2021-02-19 18:52:04,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:04,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-02-19 18:52:04,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:04,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:04,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:04,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-02-19 18:52:04,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:04,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:04,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:04,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:04,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:52:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:04,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:04,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:04,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120679311] [2021-02-19 18:52:04,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:04,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:04,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:04,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:04,267 INFO L87 Difference]: Start difference. First operand 9898 states and 36460 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) [2021-02-19 18:52:04,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:04,904 INFO L93 Difference]: Finished difference Result 12577 states and 45504 transitions. [2021-02-19 18:52:04,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:52:04,905 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 [2021-02-19 18:52:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:04,928 INFO L225 Difference]: With dead ends: 12577 [2021-02-19 18:52:04,928 INFO L226 Difference]: Without dead ends: 12516 [2021-02-19 18:52:04,928 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:52:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12516 states. [2021-02-19 18:52:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12516 to 9909. [2021-02-19 18:52:05,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9909 states, 9908 states have (on average 3.682377876463464) internal successors, (36485), 9908 states have internal predecessors, (36485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9909 states to 9909 states and 36485 transitions. [2021-02-19 18:52:05,075 INFO L78 Accepts]: Start accepts. Automaton has 9909 states and 36485 transitions. Word has length 28 [2021-02-19 18:52:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:05,075 INFO L480 AbstractCegarLoop]: Abstraction has 9909 states and 36485 transitions. [2021-02-19 18:52:05,075 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) [2021-02-19 18:52:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 9909 states and 36485 transitions. [2021-02-19 18:52:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:05,089 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:05,089 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:05,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-02-19 18:52:05,290 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:05,290 INFO L82 PathProgramCache]: Analyzing trace with hash 682120295, now seen corresponding path program 102 times [2021-02-19 18:52:05,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:05,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779607372] [2021-02-19 18:52:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:05,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779607372] [2021-02-19 18:52:05,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230704290] [2021-02-19 18:52:05,549 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 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 [2021-02-19 18:52:05,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:52:05,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:05,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:05,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:05,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:52:05,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:05,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:05,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:05,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:52:05,755 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 157 treesize of output 121 [2021-02-19 18:52:05,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:05,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:05,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:05,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:157, output treesize:43 [2021-02-19 18:52:05,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:52:05,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:05,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:05,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:05,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-02-19 18:52:05,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:05,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:05,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:05,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:05,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:52:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:05,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:05,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:05,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351227305] [2021-02-19 18:52:05,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:05,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:05,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:05,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:05,894 INFO L87 Difference]: Start difference. First operand 9909 states and 36485 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) 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) [2021-02-19 18:52:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:06,609 INFO L93 Difference]: Finished difference Result 12595 states and 45557 transitions. [2021-02-19 18:52:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:52:06,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) 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 [2021-02-19 18:52:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:06,633 INFO L225 Difference]: With dead ends: 12595 [2021-02-19 18:52:06,633 INFO L226 Difference]: Without dead ends: 12564 [2021-02-19 18:52:06,633 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:52:06,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12564 states. [2021-02-19 18:52:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12564 to 9906. [2021-02-19 18:52:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9906 states, 9905 states have (on average 3.683796062594649) internal successors, (36488), 9905 states have internal predecessors, (36488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9906 states to 9906 states and 36488 transitions. [2021-02-19 18:52:06,780 INFO L78 Accepts]: Start accepts. Automaton has 9906 states and 36488 transitions. Word has length 28 [2021-02-19 18:52:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:06,780 INFO L480 AbstractCegarLoop]: Abstraction has 9906 states and 36488 transitions. [2021-02-19 18:52:06,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) 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) [2021-02-19 18:52:06,780 INFO L276 IsEmpty]: Start isEmpty. Operand 9906 states and 36488 transitions. [2021-02-19 18:52:06,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:06,794 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:06,794 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:06,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-02-19 18:52:06,995 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:06,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:06,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1600934709, now seen corresponding path program 103 times [2021-02-19 18:52:06,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:06,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149360048] [2021-02-19 18:52:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:07,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149360048] [2021-02-19 18:52:07,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480392135] [2021-02-19 18:52:07,213 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 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 [2021-02-19 18:52:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:07,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:07,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:07,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:07,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:07,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:07,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:07,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:07,360 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 29 treesize of output 25 [2021-02-19 18:52:07,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:07,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:07,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:07,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2021-02-19 18:52:07,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:07,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-02-19 18:52:07,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:07,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:07,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:07,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:19 [2021-02-19 18:52:07,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:07,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:07,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:07,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:07,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:52:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:07,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:07,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:07,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096769673] [2021-02-19 18:52:07,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:07,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:07,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:07,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:07,547 INFO L87 Difference]: Start difference. First operand 9906 states and 36488 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) [2021-02-19 18:52:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:08,509 INFO L93 Difference]: Finished difference Result 12685 states and 45859 transitions. [2021-02-19 18:52:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:52:08,510 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 [2021-02-19 18:52:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:08,533 INFO L225 Difference]: With dead ends: 12685 [2021-02-19 18:52:08,533 INFO L226 Difference]: Without dead ends: 12663 [2021-02-19 18:52:08,533 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:52:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12663 states. [2021-02-19 18:52:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12663 to 9922. [2021-02-19 18:52:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9922 states, 9921 states have (on average 3.6834996472129826) internal successors, (36544), 9921 states have internal predecessors, (36544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9922 states to 9922 states and 36544 transitions. [2021-02-19 18:52:08,681 INFO L78 Accepts]: Start accepts. Automaton has 9922 states and 36544 transitions. Word has length 28 [2021-02-19 18:52:08,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:08,681 INFO L480 AbstractCegarLoop]: Abstraction has 9922 states and 36544 transitions. [2021-02-19 18:52:08,681 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) [2021-02-19 18:52:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 9922 states and 36544 transitions. [2021-02-19 18:52:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:08,695 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:08,695 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:08,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:08,895 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:08,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1809267993, now seen corresponding path program 104 times [2021-02-19 18:52:08,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:08,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922339495] [2021-02-19 18:52:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:09,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922339495] [2021-02-19 18:52:09,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605981779] [2021-02-19 18:52:09,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:09,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:52:09,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:09,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:09,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:09,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:52:09,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:09,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:09,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:09,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:52:09,294 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 35 treesize of output 27 [2021-02-19 18:52:09,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:09,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:09,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:09,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:47 [2021-02-19 18:52:09,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:52:09,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:09,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:09,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:09,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-02-19 18:52:09,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:09,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:09,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:09,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:09,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:52:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:09,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:09,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:09,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642441810] [2021-02-19 18:52:09,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:09,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:09,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:09,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:09,467 INFO L87 Difference]: Start difference. First operand 9922 states and 36544 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) [2021-02-19 18:52:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:10,186 INFO L93 Difference]: Finished difference Result 12658 states and 45771 transitions. [2021-02-19 18:52:10,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:52:10,187 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 [2021-02-19 18:52:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:10,211 INFO L225 Difference]: With dead ends: 12658 [2021-02-19 18:52:10,211 INFO L226 Difference]: Without dead ends: 12621 [2021-02-19 18:52:10,211 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:52:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12621 states. [2021-02-19 18:52:10,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12621 to 9937. [2021-02-19 18:52:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9937 states, 9936 states have (on average 3.6829710144927534) internal successors, (36594), 9936 states have internal predecessors, (36594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9937 states to 9937 states and 36594 transitions. [2021-02-19 18:52:10,362 INFO L78 Accepts]: Start accepts. Automaton has 9937 states and 36594 transitions. Word has length 28 [2021-02-19 18:52:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:10,362 INFO L480 AbstractCegarLoop]: Abstraction has 9937 states and 36594 transitions. [2021-02-19 18:52:10,362 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) [2021-02-19 18:52:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 9937 states and 36594 transitions. [2021-02-19 18:52:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:10,376 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:10,376 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:10,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:10,577 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash 343782759, now seen corresponding path program 105 times [2021-02-19 18:52:10,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:10,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464177142] [2021-02-19 18:52:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:10,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464177142] [2021-02-19 18:52:10,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066041148] [2021-02-19 18:52:10,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:10,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:52:10,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:10,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:10,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:10,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:10,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:10,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:10,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:10,981 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 24 treesize of output 20 [2021-02-19 18:52:10,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:10,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:10,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:10,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:30 [2021-02-19 18:52:11,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:52:11,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:11,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:11,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:11,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-02-19 18:52:11,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:11,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:11,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:11,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:11,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:52:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:11,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:11,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:11,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809303163] [2021-02-19 18:52:11,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:11,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:11,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:11,155 INFO L87 Difference]: Start difference. First operand 9937 states and 36594 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) 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) [2021-02-19 18:52:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:12,190 INFO L93 Difference]: Finished difference Result 12667 states and 45830 transitions. [2021-02-19 18:52:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:52:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) 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 [2021-02-19 18:52:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:12,215 INFO L225 Difference]: With dead ends: 12667 [2021-02-19 18:52:12,215 INFO L226 Difference]: Without dead ends: 12645 [2021-02-19 18:52:12,215 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:52:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12645 states. [2021-02-19 18:52:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12645 to 9924. [2021-02-19 18:52:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9924 states, 9923 states have (on average 3.6853774060264035) internal successors, (36570), 9923 states have internal predecessors, (36570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:12,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9924 states to 9924 states and 36570 transitions. [2021-02-19 18:52:12,365 INFO L78 Accepts]: Start accepts. Automaton has 9924 states and 36570 transitions. Word has length 28 [2021-02-19 18:52:12,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:12,365 INFO L480 AbstractCegarLoop]: Abstraction has 9924 states and 36570 transitions. [2021-02-19 18:52:12,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) 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) [2021-02-19 18:52:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 9924 states and 36570 transitions. [2021-02-19 18:52:12,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:12,379 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:12,379 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:12,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-02-19 18:52:12,580 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:12,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:12,580 INFO L82 PathProgramCache]: Analyzing trace with hash 583174755, now seen corresponding path program 106 times [2021-02-19 18:52:12,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:12,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954932545] [2021-02-19 18:52:12,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:12,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954932545] [2021-02-19 18:52:12,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686512044] [2021-02-19 18:52:12,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:12,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:52:12,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:12,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:12,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:12,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:12,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:13,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:13,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:13,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:13,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:52:13,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:13,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:13,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 18:52:13,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:13,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:13,249 INFO L518 ElimStorePlain]: Eliminatee v_C_185 vanished before elimination [2021-02-19 18:52:13,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:13,250 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-02-19 18:52:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:13,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:13,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:13,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691761300] [2021-02-19 18:52:13,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:13,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:13,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:13,279 INFO L87 Difference]: Start difference. First operand 9924 states and 36570 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:14,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:14,362 INFO L93 Difference]: Finished difference Result 11257 states and 40356 transitions. [2021-02-19 18:52:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:52:14,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:52:14,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:14,387 INFO L225 Difference]: With dead ends: 11257 [2021-02-19 18:52:14,388 INFO L226 Difference]: Without dead ends: 11242 [2021-02-19 18:52:14,388 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:52:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11242 states. [2021-02-19 18:52:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11242 to 9951. [2021-02-19 18:52:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9951 states, 9950 states have (on average 3.684723618090452) internal successors, (36663), 9950 states have internal predecessors, (36663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9951 states to 9951 states and 36663 transitions. [2021-02-19 18:52:14,551 INFO L78 Accepts]: Start accepts. Automaton has 9951 states and 36663 transitions. Word has length 28 [2021-02-19 18:52:14,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:14,551 INFO L480 AbstractCegarLoop]: Abstraction has 9951 states and 36663 transitions. [2021-02-19 18:52:14,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand 9951 states and 36663 transitions. [2021-02-19 18:52:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:14,565 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:14,565 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:14,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:14,769 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:14,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1445223261, now seen corresponding path program 107 times [2021-02-19 18:52:14,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:14,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656281314] [2021-02-19 18:52:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:15,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656281314] [2021-02-19 18:52:15,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214937774] [2021-02-19 18:52:15,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:15,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:52:15,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:15,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:52:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:15,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:15,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:15,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:15,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:15,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:15,512 INFO L446 ElimStorePlain]: Different costs {0=[v_C_187], 1=[A]} [2021-02-19 18:52:15,515 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 35 treesize of output 27 [2021-02-19 18:52:15,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:15,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:15,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:15,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-02-19 18:52:15,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:15,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:15,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:15,544 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:27 [2021-02-19 18:52:15,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:15,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:15,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:15,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:15,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:52:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:15,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:15,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 18:52:15,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435846716] [2021-02-19 18:52:15,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:52:15,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:15,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:52:15,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:52:15,626 INFO L87 Difference]: Start difference. First operand 9951 states and 36663 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-02-19 18:52:16,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:16,700 INFO L93 Difference]: Finished difference Result 11214 states and 40306 transitions. [2021-02-19 18:52:16,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:52:16,701 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 [2021-02-19 18:52:16,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:16,721 INFO L225 Difference]: With dead ends: 11214 [2021-02-19 18:52:16,722 INFO L226 Difference]: Without dead ends: 11160 [2021-02-19 18:52:16,722 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:52:16,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11160 states. [2021-02-19 18:52:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11160 to 9969. [2021-02-19 18:52:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9969 states, 9968 states have (on average 3.683687800963082) internal successors, (36719), 9968 states have internal predecessors, (36719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9969 states to 9969 states and 36719 transitions. [2021-02-19 18:52:16,879 INFO L78 Accepts]: Start accepts. Automaton has 9969 states and 36719 transitions. Word has length 28 [2021-02-19 18:52:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:16,879 INFO L480 AbstractCegarLoop]: Abstraction has 9969 states and 36719 transitions. [2021-02-19 18:52:16,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-02-19 18:52:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 9969 states and 36719 transitions. [2021-02-19 18:52:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:16,894 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:16,894 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:17,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-02-19 18:52:17,107 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:17,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:17,107 INFO L82 PathProgramCache]: Analyzing trace with hash -509289245, now seen corresponding path program 108 times [2021-02-19 18:52:17,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:17,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520084162] [2021-02-19 18:52:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:17,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520084162] [2021-02-19 18:52:17,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257630980] [2021-02-19 18:52:17,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:17,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:52:17,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:17,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:17,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:17,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:52:17,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:17,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:17,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:17,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:52:17,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:52:17,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:17,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:17,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 18:52:17,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:17,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:17,779 INFO L518 ElimStorePlain]: Eliminatee v_C_189 vanished before elimination [2021-02-19 18:52:17,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:17,780 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-02-19 18:52:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:17,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:17,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:17,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217383941] [2021-02-19 18:52:17,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:17,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:17,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:17,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:17,809 INFO L87 Difference]: Start difference. First operand 9969 states and 36719 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:18,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:18,676 INFO L93 Difference]: Finished difference Result 10797 states and 39056 transitions. [2021-02-19 18:52:18,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:52:18,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:52:18,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:18,697 INFO L225 Difference]: With dead ends: 10797 [2021-02-19 18:52:18,697 INFO L226 Difference]: Without dead ends: 10772 [2021-02-19 18:52:18,697 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:52:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10772 states. [2021-02-19 18:52:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10772 to 9994. [2021-02-19 18:52:18,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9994 states, 9993 states have (on average 3.682777944561193) internal successors, (36802), 9993 states have internal predecessors, (36802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9994 states to 9994 states and 36802 transitions. [2021-02-19 18:52:18,847 INFO L78 Accepts]: Start accepts. Automaton has 9994 states and 36802 transitions. Word has length 28 [2021-02-19 18:52:18,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:18,847 INFO L480 AbstractCegarLoop]: Abstraction has 9994 states and 36802 transitions. [2021-02-19 18:52:18,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:18,847 INFO L276 IsEmpty]: Start isEmpty. Operand 9994 states and 36802 transitions. [2021-02-19 18:52:18,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:18,862 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:18,862 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:19,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:19,062 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:19,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:19,063 INFO L82 PathProgramCache]: Analyzing trace with hash -378324889, now seen corresponding path program 109 times [2021-02-19 18:52:19,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:19,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818730773] [2021-02-19 18:52:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:19,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818730773] [2021-02-19 18:52:19,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043949360] [2021-02-19 18:52:19,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:19,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:19,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:19,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:19,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:19,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:19,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:19,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:19,630 INFO L446 ElimStorePlain]: Different costs {0=[v_C_191], 1=[B]} [2021-02-19 18:52:19,634 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 35 treesize of output 27 [2021-02-19 18:52:19,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:19,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:19,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:19,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-02-19 18:52:19,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:19,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:19,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:19,663 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:27 [2021-02-19 18:52:19,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:19,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:19,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:19,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:19,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:52:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:19,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:19,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:19,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568020452] [2021-02-19 18:52:19,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:19,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:19,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:19,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:19,746 INFO L87 Difference]: Start difference. First operand 9994 states and 36802 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) 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) [2021-02-19 18:52:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:20,899 INFO L93 Difference]: Finished difference Result 11889 states and 42208 transitions. [2021-02-19 18:52:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:52:20,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) 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 [2021-02-19 18:52:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:20,921 INFO L225 Difference]: With dead ends: 11889 [2021-02-19 18:52:20,922 INFO L226 Difference]: Without dead ends: 11827 [2021-02-19 18:52:20,922 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:52:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11827 states. [2021-02-19 18:52:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11827 to 10083. [2021-02-19 18:52:21,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10083 states, 10082 states have (on average 3.6858758182900218) internal successors, (37161), 10082 states have internal predecessors, (37161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10083 states to 10083 states and 37161 transitions. [2021-02-19 18:52:21,083 INFO L78 Accepts]: Start accepts. Automaton has 10083 states and 37161 transitions. Word has length 28 [2021-02-19 18:52:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:21,083 INFO L480 AbstractCegarLoop]: Abstraction has 10083 states and 37161 transitions. [2021-02-19 18:52:21,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) 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) [2021-02-19 18:52:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand 10083 states and 37161 transitions. [2021-02-19 18:52:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:21,097 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:21,097 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:21,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-02-19 18:52:21,298 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:21,298 INFO L82 PathProgramCache]: Analyzing trace with hash -912359801, now seen corresponding path program 110 times [2021-02-19 18:52:21,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:21,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88628620] [2021-02-19 18:52:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:21,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88628620] [2021-02-19 18:52:21,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563061019] [2021-02-19 18:52:21,591 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 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 [2021-02-19 18:52:21,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:52:21,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:21,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:52:21,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:21,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:21,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:21,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:21,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:21,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:21,824 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 81 treesize of output 61 [2021-02-19 18:52:21,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:21,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:21,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:21,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:131, output treesize:107 [2021-02-19 18:52:21,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:21,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 48 [2021-02-19 18:52:21,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:21,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:21,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:21,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:108, output treesize:46 [2021-02-19 18:52:21,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:21,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:21,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:21,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:21,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:52:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:22,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:22,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:22,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245892136] [2021-02-19 18:52:22,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:22,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:22,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:22,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:22,006 INFO L87 Difference]: Start difference. First operand 10083 states and 37161 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) [2021-02-19 18:52:22,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:22,962 INFO L93 Difference]: Finished difference Result 12824 states and 46419 transitions. [2021-02-19 18:52:22,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:52:22,963 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 [2021-02-19 18:52:22,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:22,989 INFO L225 Difference]: With dead ends: 12824 [2021-02-19 18:52:22,989 INFO L226 Difference]: Without dead ends: 12775 [2021-02-19 18:52:22,990 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:52:23,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12775 states. [2021-02-19 18:52:23,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12775 to 10091. [2021-02-19 18:52:23,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10091 states, 10090 states have (on average 3.6846382556987116) internal successors, (37178), 10090 states have internal predecessors, (37178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10091 states to 10091 states and 37178 transitions. [2021-02-19 18:52:23,226 INFO L78 Accepts]: Start accepts. Automaton has 10091 states and 37178 transitions. Word has length 28 [2021-02-19 18:52:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:23,226 INFO L480 AbstractCegarLoop]: Abstraction has 10091 states and 37178 transitions. [2021-02-19 18:52:23,226 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) [2021-02-19 18:52:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 10091 states and 37178 transitions. [2021-02-19 18:52:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:23,241 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:23,241 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:23,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:23,441 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:23,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:23,442 INFO L82 PathProgramCache]: Analyzing trace with hash 75131811, now seen corresponding path program 111 times [2021-02-19 18:52:23,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:23,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071847959] [2021-02-19 18:52:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:23,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071847959] [2021-02-19 18:52:23,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973197839] [2021-02-19 18:52:23,754 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 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 [2021-02-19 18:52:23,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:52:23,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:23,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:23,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:23,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:23,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:23,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:23,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:23,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:23,975 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 35 treesize of output 27 [2021-02-19 18:52:23,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:23,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:23,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:23,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:51 [2021-02-19 18:52:24,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:24,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-02-19 18:52:24,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:24,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:24,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:24,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-02-19 18:52:24,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:24,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:24,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:24,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:24,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:52:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:24,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:24,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:24,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696814201] [2021-02-19 18:52:24,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:24,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:24,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:24,142 INFO L87 Difference]: Start difference. First operand 10091 states and 37178 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) 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) [2021-02-19 18:52:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:25,068 INFO L93 Difference]: Finished difference Result 12852 states and 46496 transitions. [2021-02-19 18:52:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:52:25,070 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) 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 [2021-02-19 18:52:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:25,095 INFO L225 Difference]: With dead ends: 12852 [2021-02-19 18:52:25,095 INFO L226 Difference]: Without dead ends: 12813 [2021-02-19 18:52:25,095 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:52:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12813 states. [2021-02-19 18:52:25,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12813 to 10092. [2021-02-19 18:52:25,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10092 states, 10091 states have (on average 3.684570409275592) internal successors, (37181), 10091 states have internal predecessors, (37181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10092 states to 10092 states and 37181 transitions. [2021-02-19 18:52:25,250 INFO L78 Accepts]: Start accepts. Automaton has 10092 states and 37181 transitions. Word has length 28 [2021-02-19 18:52:25,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:25,251 INFO L480 AbstractCegarLoop]: Abstraction has 10092 states and 37181 transitions. [2021-02-19 18:52:25,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) 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) [2021-02-19 18:52:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 10092 states and 37181 transitions. [2021-02-19 18:52:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:25,265 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:25,265 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:25,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-02-19 18:52:25,466 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:25,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1887149027, now seen corresponding path program 112 times [2021-02-19 18:52:25,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:25,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448077100] [2021-02-19 18:52:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:25,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448077100] [2021-02-19 18:52:25,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739782453] [2021-02-19 18:52:25,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:52:25,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:52:25,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:25,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:25,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:25,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:52:25,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:25,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:25,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:25,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:52:26,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:52:26,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:26,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:26,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-02-19 18:52:26,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:26,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:26,105 INFO L518 ElimStorePlain]: Eliminatee v_C_197 vanished before elimination [2021-02-19 18:52:26,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:26,106 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-02-19 18:52:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:26,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:26,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:26,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672105918] [2021-02-19 18:52:26,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:26,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:26,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:26,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:26,142 INFO L87 Difference]: Start difference. First operand 10092 states and 37181 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:26,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:26,972 INFO L93 Difference]: Finished difference Result 10924 states and 39562 transitions. [2021-02-19 18:52:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:52:26,974 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:52:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:26,993 INFO L225 Difference]: With dead ends: 10924 [2021-02-19 18:52:26,993 INFO L226 Difference]: Without dead ends: 10909 [2021-02-19 18:52:26,993 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:52:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-02-19 18:52:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 10116. [2021-02-19 18:52:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10116 states, 10115 states have (on average 3.6829461196243205) internal successors, (37253), 10115 states have internal predecessors, (37253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10116 states to 10116 states and 37253 transitions. [2021-02-19 18:52:27,146 INFO L78 Accepts]: Start accepts. Automaton has 10116 states and 37253 transitions. Word has length 28 [2021-02-19 18:52:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:27,146 INFO L480 AbstractCegarLoop]: Abstraction has 10116 states and 37253 transitions. [2021-02-19 18:52:27,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:27,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10116 states and 37253 transitions. [2021-02-19 18:52:27,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:27,161 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:27,161 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:27,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:27,361 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2018113383, now seen corresponding path program 113 times [2021-02-19 18:52:27,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:27,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188494797] [2021-02-19 18:52:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:27,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188494797] [2021-02-19 18:52:27,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294983322] [2021-02-19 18:52:27,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:27,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:52:27,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:27,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:27,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:27,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:27,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:27,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:27,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:27,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:27,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-02-19 18:52:27,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:27,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:27,968 INFO L518 ElimStorePlain]: Eliminatee v_C_199 vanished before elimination [2021-02-19 18:52:27,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:27,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-02-19 18:52:28,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:28,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:28,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:28,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:28,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:52:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:28,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:28,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:28,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456324202] [2021-02-19 18:52:28,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:28,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:28,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:28,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:28,059 INFO L87 Difference]: Start difference. First operand 10116 states and 37253 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) 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) [2021-02-19 18:52:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:29,728 INFO L93 Difference]: Finished difference Result 11904 states and 42382 transitions. [2021-02-19 18:52:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:52:29,729 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) 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 [2021-02-19 18:52:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:29,749 INFO L225 Difference]: With dead ends: 11904 [2021-02-19 18:52:29,749 INFO L226 Difference]: Without dead ends: 11867 [2021-02-19 18:52:29,749 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:52:29,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11867 states. [2021-02-19 18:52:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11867 to 10139. [2021-02-19 18:52:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10139 states, 10138 states have (on average 3.686032748076544) internal successors, (37369), 10138 states have internal predecessors, (37369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10139 states to 10139 states and 37369 transitions. [2021-02-19 18:52:29,889 INFO L78 Accepts]: Start accepts. Automaton has 10139 states and 37369 transitions. Word has length 28 [2021-02-19 18:52:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:29,889 INFO L480 AbstractCegarLoop]: Abstraction has 10139 states and 37369 transitions. [2021-02-19 18:52:29,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) 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) [2021-02-19 18:52:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 10139 states and 37369 transitions. [2021-02-19 18:52:29,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:29,902 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:29,902 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:30,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-02-19 18:52:30,102 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:30,103 INFO L82 PathProgramCache]: Analyzing trace with hash 67702119, now seen corresponding path program 114 times [2021-02-19 18:52:30,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:30,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457935629] [2021-02-19 18:52:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:30,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457935629] [2021-02-19 18:52:30,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727459524] [2021-02-19 18:52:30,399 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 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 [2021-02-19 18:52:30,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:52:30,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:30,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:52:30,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:30,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:30,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:30,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:30,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:30,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:30,677 INFO L446 ElimStorePlain]: Different costs {0=[v_C_201], 1=[B]} [2021-02-19 18:52:30,681 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 29 treesize of output 25 [2021-02-19 18:52:30,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:30,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:30,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-02-19 18:52:30,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:30,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:30,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:30,715 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:19 [2021-02-19 18:52:30,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:30,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:30,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:30,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:30,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:52:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:30,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:30,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:30,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493512530] [2021-02-19 18:52:30,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:30,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:30,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:30,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:30,848 INFO L87 Difference]: Start difference. First operand 10139 states and 37369 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) 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) [2021-02-19 18:52:31,760 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-02-19 18:52:32,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:32,976 INFO L93 Difference]: Finished difference Result 11377 states and 40826 transitions. [2021-02-19 18:52:32,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:52:32,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) 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 [2021-02-19 18:52:32,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:32,997 INFO L225 Difference]: With dead ends: 11377 [2021-02-19 18:52:32,997 INFO L226 Difference]: Without dead ends: 11340 [2021-02-19 18:52:32,998 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:52:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11340 states. [2021-02-19 18:52:33,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11340 to 10171. [2021-02-19 18:52:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10171 states, 10170 states have (on average 3.684267453294002) internal successors, (37469), 10170 states have internal predecessors, (37469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10171 states to 10171 states and 37469 transitions. [2021-02-19 18:52:33,163 INFO L78 Accepts]: Start accepts. Automaton has 10171 states and 37469 transitions. Word has length 28 [2021-02-19 18:52:33,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:33,163 INFO L480 AbstractCegarLoop]: Abstraction has 10171 states and 37469 transitions. [2021-02-19 18:52:33,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) 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) [2021-02-19 18:52:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 10171 states and 37469 transitions. [2021-02-19 18:52:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:33,178 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:33,178 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:33,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:33,379 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:33,379 INFO L82 PathProgramCache]: Analyzing trace with hash 867043403, now seen corresponding path program 115 times [2021-02-19 18:52:33,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:33,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2949393] [2021-02-19 18:52:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:33,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2949393] [2021-02-19 18:52:33,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819583706] [2021-02-19 18:52:33,644 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 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 [2021-02-19 18:52:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:33,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:33,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:52:33,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:33,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:33,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:33,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:52:33,872 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 29 treesize of output 25 [2021-02-19 18:52:33,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:33,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:33,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:33,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2021-02-19 18:52:33,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:33,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-02-19 18:52:33,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:34,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:34,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:34,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-02-19 18:52:34,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:34,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:34,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:34,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:34,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:52:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:34,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:34,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:34,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960505536] [2021-02-19 18:52:34,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:34,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:34,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:34,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:34,117 INFO L87 Difference]: Start difference. First operand 10171 states and 37469 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) [2021-02-19 18:52:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:35,428 INFO L93 Difference]: Finished difference Result 13029 states and 47109 transitions. [2021-02-19 18:52:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:52:35,429 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 [2021-02-19 18:52:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:35,457 INFO L225 Difference]: With dead ends: 13029 [2021-02-19 18:52:35,457 INFO L226 Difference]: Without dead ends: 12996 [2021-02-19 18:52:35,457 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:52:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12996 states. [2021-02-19 18:52:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12996 to 10181. [2021-02-19 18:52:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10181 states, 10180 states have (on average 3.6835952848722986) internal successors, (37499), 10180 states have internal predecessors, (37499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10181 states to 10181 states and 37499 transitions. [2021-02-19 18:52:35,618 INFO L78 Accepts]: Start accepts. Automaton has 10181 states and 37499 transitions. Word has length 28 [2021-02-19 18:52:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:35,618 INFO L480 AbstractCegarLoop]: Abstraction has 10181 states and 37499 transitions. [2021-02-19 18:52:35,618 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) [2021-02-19 18:52:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 10181 states and 37499 transitions. [2021-02-19 18:52:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:35,633 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:35,633 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:35,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:35,833 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:35,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1854535015, now seen corresponding path program 116 times [2021-02-19 18:52:35,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:35,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113708247] [2021-02-19 18:52:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:36,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113708247] [2021-02-19 18:52:36,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551698871] [2021-02-19 18:52:36,122 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 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 [2021-02-19 18:52:36,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:52:36,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:36,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:36,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:36,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:52:36,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:36,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:36,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:36,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:52:36,386 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 29 treesize of output 25 [2021-02-19 18:52:36,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:36,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:36,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:36,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2021-02-19 18:52:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:36,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-02-19 18:52:36,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:36,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:36,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:36,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-02-19 18:52:36,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:36,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:36,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:36,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:36,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:52:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:36,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:36,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:36,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457875479] [2021-02-19 18:52:36,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:36,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:36,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:36,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:36,613 INFO L87 Difference]: Start difference. First operand 10181 states and 37499 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) 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) [2021-02-19 18:52:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:37,839 INFO L93 Difference]: Finished difference Result 13088 states and 47265 transitions. [2021-02-19 18:52:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:52:37,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) 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 [2021-02-19 18:52:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:37,866 INFO L225 Difference]: With dead ends: 13088 [2021-02-19 18:52:37,866 INFO L226 Difference]: Without dead ends: 13061 [2021-02-19 18:52:37,867 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:52:37,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13061 states. [2021-02-19 18:52:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13061 to 10178. [2021-02-19 18:52:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10178 states, 10177 states have (on average 3.684582882971406) internal successors, (37498), 10177 states have internal predecessors, (37498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10178 states to 10178 states and 37498 transitions. [2021-02-19 18:52:38,028 INFO L78 Accepts]: Start accepts. Automaton has 10178 states and 37498 transitions. Word has length 28 [2021-02-19 18:52:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:38,029 INFO L480 AbstractCegarLoop]: Abstraction has 10178 states and 37498 transitions. [2021-02-19 18:52:38,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) 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) [2021-02-19 18:52:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 10178 states and 37498 transitions. [2021-02-19 18:52:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:38,044 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:38,044 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:38,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-02-19 18:52:38,245 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:38,245 INFO L82 PathProgramCache]: Analyzing trace with hash 44108451, now seen corresponding path program 117 times [2021-02-19 18:52:38,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:38,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363729345] [2021-02-19 18:52:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:38,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363729345] [2021-02-19 18:52:38,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838097314] [2021-02-19 18:52:38,517 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 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 [2021-02-19 18:52:38,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:52:38,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:38,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:38,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:38,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:38,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:38,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:38,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:38,731 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 29 treesize of output 25 [2021-02-19 18:52:38,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:38,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:38,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:38,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2021-02-19 18:52:38,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:38,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-02-19 18:52:38,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:38,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:38,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:38,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:19 [2021-02-19 18:52:38,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:38,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:38,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:38,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:38,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:52:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:38,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:38,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-02-19 18:52:38,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652751478] [2021-02-19 18:52:38,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:52:38,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:38,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:52:38,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:38,955 INFO L87 Difference]: Start difference. First operand 10178 states and 37498 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) 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) [2021-02-19 18:52:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:40,286 INFO L93 Difference]: Finished difference Result 13067 states and 47214 transitions. [2021-02-19 18:52:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:52:40,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) 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 [2021-02-19 18:52:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:40,314 INFO L225 Difference]: With dead ends: 13067 [2021-02-19 18:52:40,314 INFO L226 Difference]: Without dead ends: 13046 [2021-02-19 18:52:40,314 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:52:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13046 states. [2021-02-19 18:52:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13046 to 10182. [2021-02-19 18:52:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10182 states, 10181 states have (on average 3.684510362439839) internal successors, (37512), 10181 states have internal predecessors, (37512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 37512 transitions. [2021-02-19 18:52:40,477 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 37512 transitions. Word has length 28 [2021-02-19 18:52:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:40,478 INFO L480 AbstractCegarLoop]: Abstraction has 10182 states and 37512 transitions. [2021-02-19 18:52:40,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) 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) [2021-02-19 18:52:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 37512 transitions. [2021-02-19 18:52:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:40,492 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:40,492 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:40,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-02-19 18:52:40,694 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:40,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1821830603, now seen corresponding path program 118 times [2021-02-19 18:52:40,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:40,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424061051] [2021-02-19 18:52:40,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:40,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424061051] [2021-02-19 18:52:40,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479566236] [2021-02-19 18:52:40,947 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 [2021-02-19 18:52:40,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:52:40,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:40,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:40,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:41,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:52:41,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:41,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:41,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:41,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:52:41,090 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 29 treesize of output 25 [2021-02-19 18:52:41,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:41,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:41,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:41,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-02-19 18:52:41,233 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-02-19 18:52:41,233 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 100 treesize of output 84 [2021-02-19 18:52:41,237 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:41,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:41,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:41,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:103, output treesize:20 [2021-02-19 18:52:41,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:41,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:41,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:41,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:41,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:52:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:41,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:41,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:52:41,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113101783] [2021-02-19 18:52:41,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:52:41,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:41,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:52:41,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:52:41,387 INFO L87 Difference]: Start difference. First operand 10182 states and 37512 transitions. Second operand has 16 states, 16 states have (on average 2.5) 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) [2021-02-19 18:52:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:42,935 INFO L93 Difference]: Finished difference Result 13093 states and 47348 transitions. [2021-02-19 18:52:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:52:42,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) 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 [2021-02-19 18:52:42,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:42,963 INFO L225 Difference]: With dead ends: 13093 [2021-02-19 18:52:42,963 INFO L226 Difference]: Without dead ends: 13078 [2021-02-19 18:52:42,963 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:52:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13078 states. [2021-02-19 18:52:43,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13078 to 10206. [2021-02-19 18:52:43,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10206 states, 10205 states have (on average 3.682900538951494) internal successors, (37584), 10205 states have internal predecessors, (37584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10206 states to 10206 states and 37584 transitions. [2021-02-19 18:52:43,163 INFO L78 Accepts]: Start accepts. Automaton has 10206 states and 37584 transitions. Word has length 28 [2021-02-19 18:52:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:43,163 INFO L480 AbstractCegarLoop]: Abstraction has 10206 states and 37584 transitions. [2021-02-19 18:52:43,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) 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) [2021-02-19 18:52:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 10206 states and 37584 transitions. [2021-02-19 18:52:43,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:43,178 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:43,179 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:43,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:43,382 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:43,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1613497319, now seen corresponding path program 119 times [2021-02-19 18:52:43,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:43,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299361016] [2021-02-19 18:52:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:43,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299361016] [2021-02-19 18:52:43,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236900418] [2021-02-19 18:52:43,645 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 [2021-02-19 18:52:43,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:52:43,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:43,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:52:43,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:43,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:52:43,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:43,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:43,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:43,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:52:43,791 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 29 treesize of output 25 [2021-02-19 18:52:43,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:43,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:43,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:43,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-02-19 18:52:43,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:43,987 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-02-19 18:52:43,987 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 102 treesize of output 86 [2021-02-19 18:52:43,990 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:44,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:44,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:44,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:109, output treesize:23 [2021-02-19 18:52:44,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:44,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:44,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:44,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:44,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:52:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:44,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:44,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:52:44,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656007926] [2021-02-19 18:52:44,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:52:44,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:44,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:52:44,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:52:44,106 INFO L87 Difference]: Start difference. First operand 10206 states and 37584 transitions. Second operand has 16 states, 16 states have (on average 2.5) 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) [2021-02-19 18:52:45,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:45,325 INFO L93 Difference]: Finished difference Result 13135 states and 47458 transitions. [2021-02-19 18:52:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:52:45,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) 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 [2021-02-19 18:52:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:45,353 INFO L225 Difference]: With dead ends: 13135 [2021-02-19 18:52:45,353 INFO L226 Difference]: Without dead ends: 13110 [2021-02-19 18:52:45,353 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:52:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13110 states. [2021-02-19 18:52:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13110 to 10220. [2021-02-19 18:52:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10220 states, 10219 states have (on average 3.6823563949505824) internal successors, (37630), 10219 states have internal predecessors, (37630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:45,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10220 states to 10220 states and 37630 transitions. [2021-02-19 18:52:45,517 INFO L78 Accepts]: Start accepts. Automaton has 10220 states and 37630 transitions. Word has length 28 [2021-02-19 18:52:45,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:45,518 INFO L480 AbstractCegarLoop]: Abstraction has 10220 states and 37630 transitions. [2021-02-19 18:52:45,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) 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) [2021-02-19 18:52:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand 10220 states and 37630 transitions. [2021-02-19 18:52:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:45,532 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:45,532 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:45,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-02-19 18:52:45,733 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash -528419225, now seen corresponding path program 120 times [2021-02-19 18:52:45,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:45,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966367880] [2021-02-19 18:52:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:45,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966367880] [2021-02-19 18:52:45,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199021947] [2021-02-19 18:52:45,993 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 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 [2021-02-19 18:52:46,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:52:46,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:46,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:52:46,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:46,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:46,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:46,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:46,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:46,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:46,182 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 29 treesize of output 25 [2021-02-19 18:52:46,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:46,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:46,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:46,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2021-02-19 18:52:46,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:46,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:46,417 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 34 treesize of output 40 [2021-02-19 18:52:46,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:52:46,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:46,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:46,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:118 [2021-02-19 18:52:46,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-02-19 18:52:46,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:46,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-02-19 18:52:46,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:46,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:46,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:46,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-02-19 18:52:46,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:46,681 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.0 percent of original size [2021-02-19 18:52:46,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 18:52:46,682 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:99, output treesize:55 [2021-02-19 18:52:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:46,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:46,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-02-19 18:52:46,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833356641] [2021-02-19 18:52:46,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:52:46,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:46,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:52:46,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:52:46,850 INFO L87 Difference]: Start difference. First operand 10220 states and 37630 transitions. Second operand has 20 states, 20 states have (on average 2.05) 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) [2021-02-19 18:52:47,438 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-02-19 18:52:47,951 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-02-19 18:52:48,430 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 18:52:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:49,172 INFO L93 Difference]: Finished difference Result 13296 states and 47972 transitions. [2021-02-19 18:52:49,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:52:49,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) 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 28 [2021-02-19 18:52:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:49,200 INFO L225 Difference]: With dead ends: 13296 [2021-02-19 18:52:49,200 INFO L226 Difference]: Without dead ends: 13281 [2021-02-19 18:52:49,200 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:52:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13281 states. [2021-02-19 18:52:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13281 to 10206. [2021-02-19 18:52:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10206 states, 10205 states have (on average 3.684468397844194) internal successors, (37600), 10205 states have internal predecessors, (37600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10206 states to 10206 states and 37600 transitions. [2021-02-19 18:52:49,363 INFO L78 Accepts]: Start accepts. Automaton has 10206 states and 37600 transitions. Word has length 28 [2021-02-19 18:52:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:49,363 INFO L480 AbstractCegarLoop]: Abstraction has 10206 states and 37600 transitions. [2021-02-19 18:52:49,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) 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) [2021-02-19 18:52:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 10206 states and 37600 transitions. [2021-02-19 18:52:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:49,379 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:49,379 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:49,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:49,579 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:49,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:49,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1255324195, now seen corresponding path program 121 times [2021-02-19 18:52:49,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:49,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394346031] [2021-02-19 18:52:49,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:49,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394346031] [2021-02-19 18:52:49,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699821506] [2021-02-19 18:52:49,856 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 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 [2021-02-19 18:52:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:49,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:49,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:49,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:49,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:49,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:49,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:49,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-02-19 18:52:50,018 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 29 treesize of output 25 [2021-02-19 18:52:50,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:50,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:50,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:50,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-02-19 18:52:50,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 18:52:50,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:50,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:50,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:50,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-02-19 18:52:50,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:50,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:50,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:50,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:50,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-02-19 18:52:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:50,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:50,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:52:50,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659458779] [2021-02-19 18:52:50,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:52:50,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:50,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:52:50,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:52:50,320 INFO L87 Difference]: Start difference. First operand 10206 states and 37600 transitions. Second operand has 16 states, 16 states have (on average 2.5) 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) [2021-02-19 18:52:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:51,762 INFO L93 Difference]: Finished difference Result 13134 states and 47489 transitions. [2021-02-19 18:52:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:52:51,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) 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 [2021-02-19 18:52:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:51,790 INFO L225 Difference]: With dead ends: 13134 [2021-02-19 18:52:51,790 INFO L226 Difference]: Without dead ends: 13119 [2021-02-19 18:52:51,790 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:52:51,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13119 states. [2021-02-19 18:52:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13119 to 10232. [2021-02-19 18:52:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10232 states, 10231 states have (on average 3.6831199296256476) internal successors, (37682), 10231 states have internal predecessors, (37682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10232 states to 10232 states and 37682 transitions. [2021-02-19 18:52:51,955 INFO L78 Accepts]: Start accepts. Automaton has 10232 states and 37682 transitions. Word has length 28 [2021-02-19 18:52:51,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:51,955 INFO L480 AbstractCegarLoop]: Abstraction has 10232 states and 37682 transitions. [2021-02-19 18:52:51,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) 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) [2021-02-19 18:52:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 10232 states and 37682 transitions. [2021-02-19 18:52:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:51,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:51,970 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:52,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-02-19 18:52:52,171 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:52,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:52,171 INFO L82 PathProgramCache]: Analyzing trace with hash -886592349, now seen corresponding path program 122 times [2021-02-19 18:52:52,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:52,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215950054] [2021-02-19 18:52:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:52,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215950054] [2021-02-19 18:52:52,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020023328] [2021-02-19 18:52:52,450 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 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 [2021-02-19 18:52:52,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:52:52,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:52,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:52:52,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:52,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:52:52,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:52,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:52,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:52,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-02-19 18:52:52,590 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 29 treesize of output 25 [2021-02-19 18:52:52,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:52,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:52,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:52,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-02-19 18:52:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:52,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-02-19 18:52:52,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:52,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:52,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:52,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:26 [2021-02-19 18:52:52,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-02-19 18:52:52,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:52,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:52,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:52,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-02-19 18:52:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:52,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:52,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 18:52:52,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737407135] [2021-02-19 18:52:52,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:52:52,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:52,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:52:52,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:52:52,838 INFO L87 Difference]: Start difference. First operand 10232 states and 37682 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-02-19 18:52:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:54,202 INFO L93 Difference]: Finished difference Result 13228 states and 47767 transitions. [2021-02-19 18:52:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:52:54,204 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 [2021-02-19 18:52:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:54,234 INFO L225 Difference]: With dead ends: 13228 [2021-02-19 18:52:54,234 INFO L226 Difference]: Without dead ends: 13203 [2021-02-19 18:52:54,235 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:52:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13203 states. [2021-02-19 18:52:54,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13203 to 10226. [2021-02-19 18:52:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10226 states, 10225 states have (on average 3.6843031784841074) internal successors, (37672), 10225 states have internal predecessors, (37672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10226 states to 10226 states and 37672 transitions. [2021-02-19 18:52:54,423 INFO L78 Accepts]: Start accepts. Automaton has 10226 states and 37672 transitions. Word has length 28 [2021-02-19 18:52:54,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:54,423 INFO L480 AbstractCegarLoop]: Abstraction has 10226 states and 37672 transitions. [2021-02-19 18:52:54,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-02-19 18:52:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 10226 states and 37672 transitions. [2021-02-19 18:52:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 18:52:54,441 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:54,441 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:54,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:54,642 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:54,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:54,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1319250851, now seen corresponding path program 123 times [2021-02-19 18:52:54,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:54,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865902171] [2021-02-19 18:52:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:54,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865902171] [2021-02-19 18:52:54,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187958851] [2021-02-19 18:52:54,946 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 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 [2021-02-19 18:52:54,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:52:54,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:54,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:52:54,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:55,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-02-19 18:52:55,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:55,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:55,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:55,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-02-19 18:52:55,146 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 25 treesize of output 21 [2021-02-19 18:52:55,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:55,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:55,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:52:55,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:37 [2021-02-19 18:52:55,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:55,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:55,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-02-19 18:52:55,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:52:55,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:55,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:52:55,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:76 [2021-02-19 18:52:55,896 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 18:52:56,015 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_31, v_prenex_30], 2=[A, v_prenex_32]} [2021-02-19 18:52:56,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-02-19 18:52:56,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:56,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:56,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-02-19 18:52:56,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:56,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:56,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:56,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2021-02-19 18:52:56,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:56,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:56,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:56,283 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 [2021-02-19 18:52:56,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:56,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:56,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 18:52:56,356 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:117, output treesize:83 [2021-02-19 18:52:56,520 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 18:52:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:56,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:56,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-02-19 18:52:56,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386334945] [2021-02-19 18:52:56,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:52:56,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:52:56,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:52:56,706 INFO L87 Difference]: Start difference. First operand 10226 states and 37672 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:58,475 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 18:52:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:59,258 INFO L93 Difference]: Finished difference Result 13149 states and 47555 transitions. [2021-02-19 18:52:59,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:52:59,260 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 18:52:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:59,285 INFO L225 Difference]: With dead ends: 13149 [2021-02-19 18:52:59,286 INFO L226 Difference]: Without dead ends: 13134 [2021-02-19 18:52:59,286 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:52:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13134 states. [2021-02-19 18:52:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13134 to 10218. [2021-02-19 18:52:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10218 states, 10217 states have (on average 3.6852304981892923) internal successors, (37652), 10217 states have internal predecessors, (37652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10218 states to 10218 states and 37652 transitions. [2021-02-19 18:52:59,447 INFO L78 Accepts]: Start accepts. Automaton has 10218 states and 37652 transitions. Word has length 28 [2021-02-19 18:52:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:59,447 INFO L480 AbstractCegarLoop]: Abstraction has 10218 states and 37652 transitions. [2021-02-19 18:52:59,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 10218 states and 37652 transitions. [2021-02-19 18:52:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:59,462 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:59,462 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:59,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-02-19 18:52:59,666 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:59,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:59,666 INFO L82 PathProgramCache]: Analyzing trace with hash 345703873, now seen corresponding path program 124 times [2021-02-19 18:52:59,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:59,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526358506] [2021-02-19 18:52:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:52:59,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526358506] [2021-02-19 18:52:59,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528818038] [2021-02-19 18:52:59,716 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 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 [2021-02-19 18:52:59,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:52:59,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:59,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:52:59,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:52:59,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:59,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 18:52:59,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51293256] [2021-02-19 18:52:59,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:52:59,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:59,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:52:59,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:52:59,808 INFO L87 Difference]: Start difference. First operand 10218 states and 37652 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 18:53:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:00,064 INFO L93 Difference]: Finished difference Result 16090 states and 56515 transitions. [2021-02-19 18:53:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:53:00,065 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 30 [2021-02-19 18:53:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:00,103 INFO L225 Difference]: With dead ends: 16090 [2021-02-19 18:53:00,103 INFO L226 Difference]: Without dead ends: 15948 [2021-02-19 18:53:00,103 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:53:00,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15948 states. [2021-02-19 18:53:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15948 to 11070. [2021-02-19 18:53:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11070 states, 11069 states have (on average 3.6679013461017256) internal successors, (40600), 11069 states have internal predecessors, (40600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11070 states to 11070 states and 40600 transitions. [2021-02-19 18:53:00,312 INFO L78 Accepts]: Start accepts. Automaton has 11070 states and 40600 transitions. Word has length 30 [2021-02-19 18:53:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:00,312 INFO L480 AbstractCegarLoop]: Abstraction has 11070 states and 40600 transitions. [2021-02-19 18:53:00,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 18:53:00,312 INFO L276 IsEmpty]: Start isEmpty. Operand 11070 states and 40600 transitions. [2021-02-19 18:53:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:00,329 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:00,329 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:00,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-02-19 18:53:00,530 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:00,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:00,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1379808891, now seen corresponding path program 125 times [2021-02-19 18:53:00,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:00,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619611961] [2021-02-19 18:53:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:00,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619611961] [2021-02-19 18:53:00,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143082123] [2021-02-19 18:53:00,584 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 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 [2021-02-19 18:53:00,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:53:00,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:00,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:00,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:00,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:00,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 18:53:00,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046574209] [2021-02-19 18:53:00,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:53:00,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:53:00,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:53:00,720 INFO L87 Difference]: Start difference. First operand 11070 states and 40600 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 18:53:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:01,015 INFO L93 Difference]: Finished difference Result 17009 states and 61131 transitions. [2021-02-19 18:53:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:53:01,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 30 [2021-02-19 18:53:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:01,056 INFO L225 Difference]: With dead ends: 17009 [2021-02-19 18:53:01,056 INFO L226 Difference]: Without dead ends: 16864 [2021-02-19 18:53:01,057 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:53:01,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16864 states. [2021-02-19 18:53:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16864 to 14592. [2021-02-19 18:53:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14592 states, 14591 states have (on average 3.7135220341306283) internal successors, (54184), 14591 states have internal predecessors, (54184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14592 states to 14592 states and 54184 transitions. [2021-02-19 18:53:01,340 INFO L78 Accepts]: Start accepts. Automaton has 14592 states and 54184 transitions. Word has length 30 [2021-02-19 18:53:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:01,340 INFO L480 AbstractCegarLoop]: Abstraction has 14592 states and 54184 transitions. [2021-02-19 18:53:01,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 18:53:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 14592 states and 54184 transitions. [2021-02-19 18:53:01,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:01,365 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:01,365 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:01,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-02-19 18:53:01,566 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash -399942271, now seen corresponding path program 126 times [2021-02-19 18:53:01,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:01,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604176991] [2021-02-19 18:53:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:01,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604176991] [2021-02-19 18:53:01,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245512311] [2021-02-19 18:53:01,640 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 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 [2021-02-19 18:53:01,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:53:01,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:01,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:01,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:01,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:01,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 18:53:01,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537754503] [2021-02-19 18:53:01,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:53:01,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:01,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:53:01,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:53:01,790 INFO L87 Difference]: Start difference. First operand 14592 states and 54184 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 18:53:02,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:02,136 INFO L93 Difference]: Finished difference Result 23634 states and 86621 transitions. [2021-02-19 18:53:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:53:02,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 30 [2021-02-19 18:53:02,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:02,192 INFO L225 Difference]: With dead ends: 23634 [2021-02-19 18:53:02,192 INFO L226 Difference]: Without dead ends: 23361 [2021-02-19 18:53:02,192 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:53:02,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23361 states. [2021-02-19 18:53:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23361 to 20407. [2021-02-19 18:53:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20407 states, 20406 states have (on average 3.7728119180633146) internal successors, (76988), 20406 states have internal predecessors, (76988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20407 states to 20407 states and 76988 transitions. [2021-02-19 18:53:02,710 INFO L78 Accepts]: Start accepts. Automaton has 20407 states and 76988 transitions. Word has length 30 [2021-02-19 18:53:02,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:02,710 INFO L480 AbstractCegarLoop]: Abstraction has 20407 states and 76988 transitions. [2021-02-19 18:53:02,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 18:53:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 20407 states and 76988 transitions. [2021-02-19 18:53:02,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:02,745 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:02,745 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:02,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-02-19 18:53:02,946 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:02,946 INFO L82 PathProgramCache]: Analyzing trace with hash -624293083, now seen corresponding path program 127 times [2021-02-19 18:53:02,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:02,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185281441] [2021-02-19 18:53:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:02,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185281441] [2021-02-19 18:53:02,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746037715] [2021-02-19 18:53:02,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:53:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:03,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:03,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:03,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:03,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:53:03,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59480548] [2021-02-19 18:53:03,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:53:03,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:03,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:53:03,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:53:03,127 INFO L87 Difference]: Start difference. First operand 20407 states and 76988 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-02-19 18:53:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:03,381 INFO L93 Difference]: Finished difference Result 22897 states and 84220 transitions. [2021-02-19 18:53:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:53:03,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 30 [2021-02-19 18:53:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:03,435 INFO L225 Difference]: With dead ends: 22897 [2021-02-19 18:53:03,435 INFO L226 Difference]: Without dead ends: 22871 [2021-02-19 18:53:03,435 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:53:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22871 states. [2021-02-19 18:53:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22871 to 18755. [2021-02-19 18:53:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18755 states, 18754 states have (on average 3.738669083928762) internal successors, (70115), 18754 states have internal predecessors, (70115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18755 states to 18755 states and 70115 transitions. [2021-02-19 18:53:03,797 INFO L78 Accepts]: Start accepts. Automaton has 18755 states and 70115 transitions. Word has length 30 [2021-02-19 18:53:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:03,797 INFO L480 AbstractCegarLoop]: Abstraction has 18755 states and 70115 transitions. [2021-02-19 18:53:03,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-02-19 18:53:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 18755 states and 70115 transitions. [2021-02-19 18:53:03,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:03,828 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:03,828 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:04,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-02-19 18:53:04,029 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:04,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:04,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2000121913, now seen corresponding path program 128 times [2021-02-19 18:53:04,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:04,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508587792] [2021-02-19 18:53:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:04,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508587792] [2021-02-19 18:53:04,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606501005] [2021-02-19 18:53:04,074 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 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 [2021-02-19 18:53:04,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:53:04,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:04,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:04,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:04,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:04,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:53:04,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31005552] [2021-02-19 18:53:04,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:53:04,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:04,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:53:04,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:53:04,198 INFO L87 Difference]: Start difference. First operand 18755 states and 70115 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-02-19 18:53:04,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:04,445 INFO L93 Difference]: Finished difference Result 20855 states and 76210 transitions. [2021-02-19 18:53:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:53:04,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 30 [2021-02-19 18:53:04,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:04,493 INFO L225 Difference]: With dead ends: 20855 [2021-02-19 18:53:04,493 INFO L226 Difference]: Without dead ends: 20813 [2021-02-19 18:53:04,493 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:53:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20813 states. [2021-02-19 18:53:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20813 to 17620. [2021-02-19 18:53:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17620 states, 17619 states have (on average 3.7413020035189284) internal successors, (65918), 17619 states have internal predecessors, (65918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17620 states to 17620 states and 65918 transitions. [2021-02-19 18:53:04,817 INFO L78 Accepts]: Start accepts. Automaton has 17620 states and 65918 transitions. Word has length 30 [2021-02-19 18:53:04,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:04,817 INFO L480 AbstractCegarLoop]: Abstraction has 17620 states and 65918 transitions. [2021-02-19 18:53:04,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-02-19 18:53:04,817 INFO L276 IsEmpty]: Start isEmpty. Operand 17620 states and 65918 transitions. [2021-02-19 18:53:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:04,846 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:04,846 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:05,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:05,046 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:05,046 INFO L82 PathProgramCache]: Analyzing trace with hash 839561435, now seen corresponding path program 129 times [2021-02-19 18:53:05,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:05,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884071682] [2021-02-19 18:53:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:05,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884071682] [2021-02-19 18:53:05,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355931511] [2021-02-19 18:53:05,122 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 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 [2021-02-19 18:53:05,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:53:05,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:05,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:05,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-02-19 18:53:05,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000022420] [2021-02-19 18:53:05,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:53:05,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:05,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:53:05,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:53:05,306 INFO L87 Difference]: Start difference. First operand 17620 states and 65918 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:07,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:07,625 INFO L93 Difference]: Finished difference Result 35060 states and 125579 transitions. [2021-02-19 18:53:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 18:53:07,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:53:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:07,713 INFO L225 Difference]: With dead ends: 35060 [2021-02-19 18:53:07,713 INFO L226 Difference]: Without dead ends: 34670 [2021-02-19 18:53:07,714 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1120, Invalid=4282, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 18:53:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34670 states. [2021-02-19 18:53:08,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34670 to 24129. [2021-02-19 18:53:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24129 states, 24128 states have (on average 3.7625994694960214) internal successors, (90784), 24128 states have internal predecessors, (90784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:08,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24129 states to 24129 states and 90784 transitions. [2021-02-19 18:53:08,238 INFO L78 Accepts]: Start accepts. Automaton has 24129 states and 90784 transitions. Word has length 30 [2021-02-19 18:53:08,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:08,238 INFO L480 AbstractCegarLoop]: Abstraction has 24129 states and 90784 transitions. [2021-02-19 18:53:08,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:08,238 INFO L276 IsEmpty]: Start isEmpty. Operand 24129 states and 90784 transitions. [2021-02-19 18:53:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:08,280 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:08,280 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:08,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-02-19 18:53:08,480 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:08,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1742075711, now seen corresponding path program 130 times [2021-02-19 18:53:08,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:08,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204844154] [2021-02-19 18:53:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:08,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204844154] [2021-02-19 18:53:08,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935425576] [2021-02-19 18:53:08,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:53:08,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:53:08,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:08,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:53:08,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:08,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:53:08,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287345017] [2021-02-19 18:53:08,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:53:08,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:08,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:53:08,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:53:08,655 INFO L87 Difference]: Start difference. First operand 24129 states and 90784 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-02-19 18:53:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:08,983 INFO L93 Difference]: Finished difference Result 40525 states and 148942 transitions. [2021-02-19 18:53:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:53:08,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 30 [2021-02-19 18:53:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:09,105 INFO L225 Difference]: With dead ends: 40525 [2021-02-19 18:53:09,105 INFO L226 Difference]: Without dead ends: 40509 [2021-02-19 18:53:09,105 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:53:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40509 states. [2021-02-19 18:53:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40509 to 31666. [2021-02-19 18:53:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31666 states, 31665 states have (on average 3.8095373440707405) internal successors, (120629), 31665 states have internal predecessors, (120629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31666 states to 31666 states and 120629 transitions. [2021-02-19 18:53:10,032 INFO L78 Accepts]: Start accepts. Automaton has 31666 states and 120629 transitions. Word has length 30 [2021-02-19 18:53:10,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:10,032 INFO L480 AbstractCegarLoop]: Abstraction has 31666 states and 120629 transitions. [2021-02-19 18:53:10,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-02-19 18:53:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 31666 states and 120629 transitions. [2021-02-19 18:53:10,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:10,089 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:10,089 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:10,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-02-19 18:53:10,290 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:10,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1974554245, now seen corresponding path program 131 times [2021-02-19 18:53:10,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:10,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14973539] [2021-02-19 18:53:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:10,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14973539] [2021-02-19 18:53:10,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223037288] [2021-02-19 18:53:10,492 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 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 [2021-02-19 18:53:10,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:53:10,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:10,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:53:10,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:10,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:53:10,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128634511] [2021-02-19 18:53:10,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:53:10,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:10,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:53:10,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:53:10,614 INFO L87 Difference]: Start difference. First operand 31666 states and 120629 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-02-19 18:53:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:10,961 INFO L93 Difference]: Finished difference Result 37867 states and 142317 transitions. [2021-02-19 18:53:10,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:53:10,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 30 [2021-02-19 18:53:10,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:11,065 INFO L225 Difference]: With dead ends: 37867 [2021-02-19 18:53:11,066 INFO L226 Difference]: Without dead ends: 37821 [2021-02-19 18:53:11,066 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:53:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37821 states. [2021-02-19 18:53:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37821 to 32328. [2021-02-19 18:53:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32328 states, 32327 states have (on average 3.8192223218981036) internal successors, (123464), 32327 states have internal predecessors, (123464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32328 states to 32328 states and 123464 transitions. [2021-02-19 18:53:11,932 INFO L78 Accepts]: Start accepts. Automaton has 32328 states and 123464 transitions. Word has length 30 [2021-02-19 18:53:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:11,932 INFO L480 AbstractCegarLoop]: Abstraction has 32328 states and 123464 transitions. [2021-02-19 18:53:11,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-02-19 18:53:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 32328 states and 123464 transitions. [2021-02-19 18:53:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:11,995 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:11,996 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:12,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:12,196 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:12,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1160709715, now seen corresponding path program 132 times [2021-02-19 18:53:12,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:12,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594235999] [2021-02-19 18:53:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:12,341 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-02-19 18:53:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:53:12,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594235999] [2021-02-19 18:53:12,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586223014] [2021-02-19 18:53:12,364 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 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 [2021-02-19 18:53:12,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:53:12,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:12,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:12,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:53:12,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:12,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:53:12,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679950949] [2021-02-19 18:53:12,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:53:12,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:53:12,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:53:12,514 INFO L87 Difference]: Start difference. First operand 32328 states and 123464 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-02-19 18:53:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:12,930 INFO L93 Difference]: Finished difference Result 37558 states and 140057 transitions. [2021-02-19 18:53:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:53:12,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 30 [2021-02-19 18:53:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:13,031 INFO L225 Difference]: With dead ends: 37558 [2021-02-19 18:53:13,031 INFO L226 Difference]: Without dead ends: 37548 [2021-02-19 18:53:13,032 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:53:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37548 states. [2021-02-19 18:53:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37548 to 32832. [2021-02-19 18:53:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32832 states, 32831 states have (on average 3.8092351740732844) internal successors, (125061), 32831 states have internal predecessors, (125061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32832 states to 32832 states and 125061 transitions. [2021-02-19 18:53:13,827 INFO L78 Accepts]: Start accepts. Automaton has 32832 states and 125061 transitions. Word has length 30 [2021-02-19 18:53:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:13,827 INFO L480 AbstractCegarLoop]: Abstraction has 32832 states and 125061 transitions. [2021-02-19 18:53:13,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-02-19 18:53:13,827 INFO L276 IsEmpty]: Start isEmpty. Operand 32832 states and 125061 transitions. [2021-02-19 18:53:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:13,885 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:13,885 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:14,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:14,086 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:14,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:14,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1758428751, now seen corresponding path program 133 times [2021-02-19 18:53:14,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:14,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842913946] [2021-02-19 18:53:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:53:14,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842913946] [2021-02-19 18:53:14,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016685390] [2021-02-19 18:53:14,135 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 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 [2021-02-19 18:53:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:14,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:14,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:53:14,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:14,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:53:14,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340727116] [2021-02-19 18:53:14,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:53:14,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:14,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:53:14,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:53:14,262 INFO L87 Difference]: Start difference. First operand 32832 states and 125061 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-02-19 18:53:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:14,749 INFO L93 Difference]: Finished difference Result 38663 states and 142770 transitions. [2021-02-19 18:53:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:53:14,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 30 [2021-02-19 18:53:14,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:14,877 INFO L225 Difference]: With dead ends: 38663 [2021-02-19 18:53:14,877 INFO L226 Difference]: Without dead ends: 38573 [2021-02-19 18:53:14,877 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:53:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38573 states. [2021-02-19 18:53:15,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38573 to 29347. [2021-02-19 18:53:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29347 states, 29346 states have (on average 3.7837183943297212) internal successors, (111037), 29346 states have internal predecessors, (111037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29347 states to 29347 states and 111037 transitions. [2021-02-19 18:53:15,740 INFO L78 Accepts]: Start accepts. Automaton has 29347 states and 111037 transitions. Word has length 30 [2021-02-19 18:53:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:15,740 INFO L480 AbstractCegarLoop]: Abstraction has 29347 states and 111037 transitions. [2021-02-19 18:53:15,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-02-19 18:53:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 29347 states and 111037 transitions. [2021-02-19 18:53:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:15,799 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:15,799 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:16,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:16,014 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:16,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:16,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1566506519, now seen corresponding path program 134 times [2021-02-19 18:53:16,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:16,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63684235] [2021-02-19 18:53:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:16,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63684235] [2021-02-19 18:53:16,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910362353] [2021-02-19 18:53:16,048 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 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 [2021-02-19 18:53:16,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:53:16,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:16,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:16,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:16,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:16,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 18:53:16,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199431563] [2021-02-19 18:53:16,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:53:16,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:16,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:53:16,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:53:16,148 INFO L87 Difference]: Start difference. First operand 29347 states and 111037 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-02-19 18:53:16,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:16,599 INFO L93 Difference]: Finished difference Result 33522 states and 123118 transitions. [2021-02-19 18:53:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:53:16,601 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 30 [2021-02-19 18:53:16,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:16,689 INFO L225 Difference]: With dead ends: 33522 [2021-02-19 18:53:16,689 INFO L226 Difference]: Without dead ends: 33508 [2021-02-19 18:53:16,690 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:53:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33508 states. [2021-02-19 18:53:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33508 to 28623. [2021-02-19 18:53:17,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28623 states, 28622 states have (on average 3.7501921598770176) internal successors, (107338), 28622 states have internal predecessors, (107338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28623 states to 28623 states and 107338 transitions. [2021-02-19 18:53:17,414 INFO L78 Accepts]: Start accepts. Automaton has 28623 states and 107338 transitions. Word has length 30 [2021-02-19 18:53:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:17,414 INFO L480 AbstractCegarLoop]: Abstraction has 28623 states and 107338 transitions. [2021-02-19 18:53:17,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-02-19 18:53:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 28623 states and 107338 transitions. [2021-02-19 18:53:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:17,598 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:17,598 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:17,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-02-19 18:53:17,810 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:17,810 INFO L82 PathProgramCache]: Analyzing trace with hash -997750103, now seen corresponding path program 135 times [2021-02-19 18:53:17,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:17,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177136900] [2021-02-19 18:53:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:17,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177136900] [2021-02-19 18:53:17,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093621614] [2021-02-19 18:53:17,867 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 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 [2021-02-19 18:53:17,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:53:17,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:17,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:17,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:18,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:18,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-02-19 18:53:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108610191] [2021-02-19 18:53:18,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:53:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:18,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:53:18,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:53:18,099 INFO L87 Difference]: Start difference. First operand 28623 states and 107338 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:20,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:20,677 INFO L93 Difference]: Finished difference Result 56359 states and 199049 transitions. [2021-02-19 18:53:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 18:53:20,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:53:20,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:20,838 INFO L225 Difference]: With dead ends: 56359 [2021-02-19 18:53:20,838 INFO L226 Difference]: Without dead ends: 55494 [2021-02-19 18:53:20,838 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1112, Invalid=3858, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:53:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55494 states. [2021-02-19 18:53:21,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55494 to 28790. [2021-02-19 18:53:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28790 states, 28789 states have (on average 3.701483205390948) internal successors, (106562), 28789 states have internal predecessors, (106562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28790 states to 28790 states and 106562 transitions. [2021-02-19 18:53:21,838 INFO L78 Accepts]: Start accepts. Automaton has 28790 states and 106562 transitions. Word has length 30 [2021-02-19 18:53:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:21,838 INFO L480 AbstractCegarLoop]: Abstraction has 28790 states and 106562 transitions. [2021-02-19 18:53:21,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:21,839 INFO L276 IsEmpty]: Start isEmpty. Operand 28790 states and 106562 transitions. [2021-02-19 18:53:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:21,895 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:21,895 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:22,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-02-19 18:53:22,095 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:22,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1015347259, now seen corresponding path program 136 times [2021-02-19 18:53:22,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:22,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711078142] [2021-02-19 18:53:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:53:22,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711078142] [2021-02-19 18:53:22,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801128379] [2021-02-19 18:53:22,152 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 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 [2021-02-19 18:53:22,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:53:22,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:22,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:53:22,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:22,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 18:53:22,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568296197] [2021-02-19 18:53:22,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:53:22,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:22,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:53:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:53:22,361 INFO L87 Difference]: Start difference. First operand 28790 states and 106562 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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) [2021-02-19 18:53:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:24,434 INFO L93 Difference]: Finished difference Result 46535 states and 165530 transitions. [2021-02-19 18:53:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 18:53:24,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 [2021-02-19 18:53:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:24,564 INFO L225 Difference]: With dead ends: 46535 [2021-02-19 18:53:24,564 INFO L226 Difference]: Without dead ends: 46360 [2021-02-19 18:53:24,565 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=669, Invalid=2301, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:53:24,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46360 states. [2021-02-19 18:53:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46360 to 30650. [2021-02-19 18:53:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30650 states, 30649 states have (on average 3.7163039577147705) internal successors, (113901), 30649 states have internal predecessors, (113901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30650 states to 30650 states and 113901 transitions. [2021-02-19 18:53:25,380 INFO L78 Accepts]: Start accepts. Automaton has 30650 states and 113901 transitions. Word has length 30 [2021-02-19 18:53:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:25,380 INFO L480 AbstractCegarLoop]: Abstraction has 30650 states and 113901 transitions. [2021-02-19 18:53:25,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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) [2021-02-19 18:53:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 30650 states and 113901 transitions. [2021-02-19 18:53:25,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:25,434 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:25,434 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:25,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-02-19 18:53:25,634 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:25,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:25,634 INFO L82 PathProgramCache]: Analyzing trace with hash -479264805, now seen corresponding path program 137 times [2021-02-19 18:53:25,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:25,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188912217] [2021-02-19 18:53:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:53:25,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188912217] [2021-02-19 18:53:25,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596220298] [2021-02-19 18:53:25,687 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 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 [2021-02-19 18:53:25,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:53:25,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:25,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:53:25,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:53:25,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:25,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:53:25,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276110532] [2021-02-19 18:53:25,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:53:25,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:25,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:53:25,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:53:25,828 INFO L87 Difference]: Start difference. First operand 30650 states and 113901 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-02-19 18:53:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:26,409 INFO L93 Difference]: Finished difference Result 39072 states and 143344 transitions. [2021-02-19 18:53:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:53:26,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 30 [2021-02-19 18:53:26,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:26,530 INFO L225 Difference]: With dead ends: 39072 [2021-02-19 18:53:26,530 INFO L226 Difference]: Without dead ends: 39035 [2021-02-19 18:53:26,530 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:53:26,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39035 states. [2021-02-19 18:53:27,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39035 to 35818. [2021-02-19 18:53:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35818 states, 35817 states have (on average 3.7336739537091326) internal successors, (133729), 35817 states have internal predecessors, (133729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35818 states to 35818 states and 133729 transitions. [2021-02-19 18:53:27,329 INFO L78 Accepts]: Start accepts. Automaton has 35818 states and 133729 transitions. Word has length 30 [2021-02-19 18:53:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:27,329 INFO L480 AbstractCegarLoop]: Abstraction has 35818 states and 133729 transitions. [2021-02-19 18:53:27,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-02-19 18:53:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 35818 states and 133729 transitions. [2021-02-19 18:53:27,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:27,395 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:27,395 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:27,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-02-19 18:53:27,596 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash -2095896357, now seen corresponding path program 138 times [2021-02-19 18:53:27,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:27,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047155526] [2021-02-19 18:53:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:53:27,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047155526] [2021-02-19 18:53:27,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792617255] [2021-02-19 18:53:27,656 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 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 [2021-02-19 18:53:27,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:53:27,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:27,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:27,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:53:27,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:27,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 18:53:27,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044637285] [2021-02-19 18:53:27,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:53:27,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:27,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:53:27,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:53:27,879 INFO L87 Difference]: Start difference. First operand 35818 states and 133729 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:29,840 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-02-19 18:53:30,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:30,191 INFO L93 Difference]: Finished difference Result 52120 states and 182030 transitions. [2021-02-19 18:53:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 18:53:30,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:53:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:30,338 INFO L225 Difference]: With dead ends: 52120 [2021-02-19 18:53:30,338 INFO L226 Difference]: Without dead ends: 52014 [2021-02-19 18:53:30,339 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=948, Invalid=3474, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:53:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52014 states. [2021-02-19 18:53:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52014 to 33715. [2021-02-19 18:53:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33715 states, 33714 states have (on average 3.7108026339206264) internal successors, (125106), 33714 states have internal predecessors, (125106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33715 states to 33715 states and 125106 transitions. [2021-02-19 18:53:31,308 INFO L78 Accepts]: Start accepts. Automaton has 33715 states and 125106 transitions. Word has length 30 [2021-02-19 18:53:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:31,309 INFO L480 AbstractCegarLoop]: Abstraction has 33715 states and 125106 transitions. [2021-02-19 18:53:31,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 33715 states and 125106 transitions. [2021-02-19 18:53:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:31,367 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:31,367 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:31,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:31,567 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:31,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:31,568 INFO L82 PathProgramCache]: Analyzing trace with hash -427570953, now seen corresponding path program 139 times [2021-02-19 18:53:31,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:31,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304767407] [2021-02-19 18:53:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:31,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304767407] [2021-02-19 18:53:31,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871051721] [2021-02-19 18:53:31,635 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 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 [2021-02-19 18:53:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:31,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:31,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:53:31,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:31,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-02-19 18:53:31,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642582377] [2021-02-19 18:53:31,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:53:31,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:31,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:53:31,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:53:31,856 INFO L87 Difference]: Start difference. First operand 33715 states and 125106 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:34,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:34,492 INFO L93 Difference]: Finished difference Result 49892 states and 171684 transitions. [2021-02-19 18:53:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 18:53:34,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:53:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:34,637 INFO L225 Difference]: With dead ends: 49892 [2021-02-19 18:53:34,638 INFO L226 Difference]: Without dead ends: 49552 [2021-02-19 18:53:34,638 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1199, Invalid=3771, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:53:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49552 states. [2021-02-19 18:53:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49552 to 33552. [2021-02-19 18:53:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33552 states, 33551 states have (on average 3.686507108580966) internal successors, (123686), 33551 states have internal predecessors, (123686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33552 states to 33552 states and 123686 transitions. [2021-02-19 18:53:35,716 INFO L78 Accepts]: Start accepts. Automaton has 33552 states and 123686 transitions. Word has length 30 [2021-02-19 18:53:35,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:35,716 INFO L480 AbstractCegarLoop]: Abstraction has 33552 states and 123686 transitions. [2021-02-19 18:53:35,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:35,717 INFO L276 IsEmpty]: Start isEmpty. Operand 33552 states and 123686 transitions. [2021-02-19 18:53:35,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:35,773 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:35,773 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:35,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-02-19 18:53:35,974 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1981570949, now seen corresponding path program 140 times [2021-02-19 18:53:35,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:35,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250373914] [2021-02-19 18:53:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:36,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250373914] [2021-02-19 18:53:36,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202042430] [2021-02-19 18:53:36,033 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 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 [2021-02-19 18:53:36,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:53:36,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:36,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:53:36,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:36,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 18:53:36,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974932681] [2021-02-19 18:53:36,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:53:36,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:36,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:53:36,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:53:36,165 INFO L87 Difference]: Start difference. First operand 33552 states and 123686 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-02-19 18:53:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:36,546 INFO L93 Difference]: Finished difference Result 36641 states and 132649 transitions. [2021-02-19 18:53:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:53:36,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 30 [2021-02-19 18:53:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:36,644 INFO L225 Difference]: With dead ends: 36641 [2021-02-19 18:53:36,645 INFO L226 Difference]: Without dead ends: 36484 [2021-02-19 18:53:36,645 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:53:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36484 states. [2021-02-19 18:53:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36484 to 33265. [2021-02-19 18:53:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33265 states, 33264 states have (on average 3.6912578162578162) internal successors, (122786), 33264 states have internal predecessors, (122786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33265 states to 33265 states and 122786 transitions. [2021-02-19 18:53:37,374 INFO L78 Accepts]: Start accepts. Automaton has 33265 states and 122786 transitions. Word has length 30 [2021-02-19 18:53:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:37,374 INFO L480 AbstractCegarLoop]: Abstraction has 33265 states and 122786 transitions. [2021-02-19 18:53:37,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-02-19 18:53:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 33265 states and 122786 transitions. [2021-02-19 18:53:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:37,431 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:37,431 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:37,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-02-19 18:53:37,631 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:37,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1449964265, now seen corresponding path program 141 times [2021-02-19 18:53:37,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:37,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208768364] [2021-02-19 18:53:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:53:37,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208768364] [2021-02-19 18:53:37,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612577795] [2021-02-19 18:53:37,690 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 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 [2021-02-19 18:53:37,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:53:37,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:37,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:37,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:37,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:37,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 18:53:37,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982678561] [2021-02-19 18:53:37,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:53:37,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:37,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:53:37,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:53:37,844 INFO L87 Difference]: Start difference. First operand 33265 states and 122786 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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) [2021-02-19 18:53:38,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:38,479 INFO L93 Difference]: Finished difference Result 41993 states and 149132 transitions. [2021-02-19 18:53:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:53:38,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 30 [2021-02-19 18:53:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:38,591 INFO L225 Difference]: With dead ends: 41993 [2021-02-19 18:53:38,591 INFO L226 Difference]: Without dead ends: 41943 [2021-02-19 18:53:38,592 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:53:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41943 states. [2021-02-19 18:53:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41943 to 33014. [2021-02-19 18:53:39,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33014 states, 33013 states have (on average 3.6784297095083756) internal successors, (121436), 33013 states have internal predecessors, (121436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33014 states to 33014 states and 121436 transitions. [2021-02-19 18:53:39,378 INFO L78 Accepts]: Start accepts. Automaton has 33014 states and 121436 transitions. Word has length 30 [2021-02-19 18:53:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:39,378 INFO L480 AbstractCegarLoop]: Abstraction has 33014 states and 121436 transitions. [2021-02-19 18:53:39,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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) [2021-02-19 18:53:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 33014 states and 121436 transitions. [2021-02-19 18:53:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:39,438 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:39,438 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:39,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:39,638 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1986261883, now seen corresponding path program 142 times [2021-02-19 18:53:39,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:39,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36881926] [2021-02-19 18:53:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:39,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36881926] [2021-02-19 18:53:39,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961306771] [2021-02-19 18:53:39,704 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 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 [2021-02-19 18:53:39,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:53:39,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:39,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:39,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:53:39,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:39,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:53:39,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596370083] [2021-02-19 18:53:39,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:53:39,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:39,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:53:39,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:53:39,851 INFO L87 Difference]: Start difference. First operand 33014 states and 121436 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-02-19 18:53:40,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:40,245 INFO L93 Difference]: Finished difference Result 40510 states and 147284 transitions. [2021-02-19 18:53:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:53:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 30 [2021-02-19 18:53:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:40,361 INFO L225 Difference]: With dead ends: 40510 [2021-02-19 18:53:40,361 INFO L226 Difference]: Without dead ends: 40457 [2021-02-19 18:53:40,361 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:53:40,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40457 states. [2021-02-19 18:53:41,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40457 to 37745. [2021-02-19 18:53:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37745 states, 37744 states have (on average 3.6998993217465026) internal successors, (139649), 37744 states have internal predecessors, (139649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37745 states to 37745 states and 139649 transitions. [2021-02-19 18:53:41,348 INFO L78 Accepts]: Start accepts. Automaton has 37745 states and 139649 transitions. Word has length 30 [2021-02-19 18:53:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:41,348 INFO L480 AbstractCegarLoop]: Abstraction has 37745 states and 139649 transitions. [2021-02-19 18:53:41,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-02-19 18:53:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 37745 states and 139649 transitions. [2021-02-19 18:53:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:41,419 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:41,420 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:41,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable471 [2021-02-19 18:53:41,627 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:41,627 INFO L82 PathProgramCache]: Analyzing trace with hash -826558547, now seen corresponding path program 143 times [2021-02-19 18:53:41,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:41,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370697939] [2021-02-19 18:53:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:53:41,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370697939] [2021-02-19 18:53:41,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252046807] [2021-02-19 18:53:41,661 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 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 [2021-02-19 18:53:41,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:53:41,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:41,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:41,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:53:41,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:41,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:53:41,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999591956] [2021-02-19 18:53:41,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:53:41,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:41,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:53:41,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:53:41,754 INFO L87 Difference]: Start difference. First operand 37745 states and 139649 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-02-19 18:53:42,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:42,343 INFO L93 Difference]: Finished difference Result 42078 states and 152775 transitions. [2021-02-19 18:53:42,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:53:42,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 30 [2021-02-19 18:53:42,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:42,458 INFO L225 Difference]: With dead ends: 42078 [2021-02-19 18:53:42,458 INFO L226 Difference]: Without dead ends: 42068 [2021-02-19 18:53:42,458 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:53:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42068 states. [2021-02-19 18:53:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42068 to 37882. [2021-02-19 18:53:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37882 states, 37881 states have (on average 3.698292019746047) internal successors, (140095), 37881 states have internal predecessors, (140095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37882 states to 37882 states and 140095 transitions. [2021-02-19 18:53:43,345 INFO L78 Accepts]: Start accepts. Automaton has 37882 states and 140095 transitions. Word has length 30 [2021-02-19 18:53:43,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:43,345 INFO L480 AbstractCegarLoop]: Abstraction has 37882 states and 140095 transitions. [2021-02-19 18:53:43,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-02-19 18:53:43,345 INFO L276 IsEmpty]: Start isEmpty. Operand 37882 states and 140095 transitions. [2021-02-19 18:53:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:43,411 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:43,411 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:43,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:43,611 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:43,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1232355351, now seen corresponding path program 144 times [2021-02-19 18:53:43,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:43,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064826815] [2021-02-19 18:53:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:53:43,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064826815] [2021-02-19 18:53:43,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104220219] [2021-02-19 18:53:43,665 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 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 [2021-02-19 18:53:43,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:53:43,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:43,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:53:43,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:43,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:43,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-02-19 18:53:43,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281728458] [2021-02-19 18:53:43,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:53:43,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:43,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:53:43,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:53:43,927 INFO L87 Difference]: Start difference. First operand 37882 states and 140095 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-02-19 18:53:46,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:46,553 INFO L93 Difference]: Finished difference Result 72023 states and 252265 transitions. [2021-02-19 18:53:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 18:53:46,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 [2021-02-19 18:53:46,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:46,764 INFO L225 Difference]: With dead ends: 72023 [2021-02-19 18:53:46,764 INFO L226 Difference]: Without dead ends: 71248 [2021-02-19 18:53:46,764 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1029, Invalid=3663, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 18:53:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71248 states. [2021-02-19 18:53:47,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71248 to 44317. [2021-02-19 18:53:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44317 states, 44316 states have (on average 3.66993862261937) internal successors, (162637), 44316 states have internal predecessors, (162637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:48,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44317 states to 44317 states and 162637 transitions. [2021-02-19 18:53:48,313 INFO L78 Accepts]: Start accepts. Automaton has 44317 states and 162637 transitions. Word has length 30 [2021-02-19 18:53:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:48,313 INFO L480 AbstractCegarLoop]: Abstraction has 44317 states and 162637 transitions. [2021-02-19 18:53:48,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-02-19 18:53:48,313 INFO L276 IsEmpty]: Start isEmpty. Operand 44317 states and 162637 transitions. [2021-02-19 18:53:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:48,416 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:48,416 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:48,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:48,616 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:48,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1860861769, now seen corresponding path program 145 times [2021-02-19 18:53:48,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:48,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526769231] [2021-02-19 18:53:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:53:48,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526769231] [2021-02-19 18:53:48,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324152052] [2021-02-19 18:53:48,676 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 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 [2021-02-19 18:53:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:48,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:48,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:53:48,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:48,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-02-19 18:53:48,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793801999] [2021-02-19 18:53:48,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:53:48,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:48,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:53:48,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:53:48,836 INFO L87 Difference]: Start difference. First operand 44317 states and 162637 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-02-19 18:53:49,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:49,344 INFO L93 Difference]: Finished difference Result 61720 states and 222010 transitions. [2021-02-19 18:53:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:53:49,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 30 [2021-02-19 18:53:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:49,525 INFO L225 Difference]: With dead ends: 61720 [2021-02-19 18:53:49,526 INFO L226 Difference]: Without dead ends: 61622 [2021-02-19 18:53:49,526 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:53:49,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61622 states. [2021-02-19 18:53:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61622 to 53350. [2021-02-19 18:53:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53350 states, 53349 states have (on average 3.6997319537385893) internal successors, (197377), 53349 states have internal predecessors, (197377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53350 states to 53350 states and 197377 transitions. [2021-02-19 18:53:51,040 INFO L78 Accepts]: Start accepts. Automaton has 53350 states and 197377 transitions. Word has length 30 [2021-02-19 18:53:51,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:51,040 INFO L480 AbstractCegarLoop]: Abstraction has 53350 states and 197377 transitions. [2021-02-19 18:53:51,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-02-19 18:53:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 53350 states and 197377 transitions. [2021-02-19 18:53:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:51,131 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:51,131 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:51,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:51,332 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:51,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:51,335 INFO L82 PathProgramCache]: Analyzing trace with hash -35383863, now seen corresponding path program 146 times [2021-02-19 18:53:51,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:51,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772379036] [2021-02-19 18:53:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:53:51,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772379036] [2021-02-19 18:53:51,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860572017] [2021-02-19 18:53:51,387 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 [2021-02-19 18:53:51,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:53:51,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:51,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:51,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:53:51,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:51,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:53:51,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729348036] [2021-02-19 18:53:51,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:53:51,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:51,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:53:51,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:53:51,545 INFO L87 Difference]: Start difference. First operand 53350 states and 197377 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-02-19 18:53:52,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:52,036 INFO L93 Difference]: Finished difference Result 63028 states and 226241 transitions. [2021-02-19 18:53:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:53:52,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 30 [2021-02-19 18:53:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:52,207 INFO L225 Difference]: With dead ends: 63028 [2021-02-19 18:53:52,208 INFO L226 Difference]: Without dead ends: 63012 [2021-02-19 18:53:52,208 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:53:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63012 states. [2021-02-19 18:53:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63012 to 53374. [2021-02-19 18:53:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53374 states, 53373 states have (on average 3.6961759691229648) internal successors, (197276), 53373 states have internal predecessors, (197276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53374 states to 53374 states and 197276 transitions. [2021-02-19 18:53:53,856 INFO L78 Accepts]: Start accepts. Automaton has 53374 states and 197276 transitions. Word has length 30 [2021-02-19 18:53:53,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:53,857 INFO L480 AbstractCegarLoop]: Abstraction has 53374 states and 197276 transitions. [2021-02-19 18:53:53,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-02-19 18:53:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 53374 states and 197276 transitions. [2021-02-19 18:53:53,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:53,967 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:53,967 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:54,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-02-19 18:53:54,168 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:54,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:54,168 INFO L82 PathProgramCache]: Analyzing trace with hash -364160179, now seen corresponding path program 147 times [2021-02-19 18:53:54,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:54,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402646401] [2021-02-19 18:53:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:53:54,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402646401] [2021-02-19 18:53:54,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758355378] [2021-02-19 18:53:54,234 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 [2021-02-19 18:53:54,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:53:54,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:54,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:54,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:53:54,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:54,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 18:53:54,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886433480] [2021-02-19 18:53:54,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:53:54,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:54,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:53:54,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:53:54,405 INFO L87 Difference]: Start difference. First operand 53374 states and 197276 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-02-19 18:53:54,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:54,977 INFO L93 Difference]: Finished difference Result 60982 states and 219589 transitions. [2021-02-19 18:53:54,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:53:54,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 30 [2021-02-19 18:53:54,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:55,162 INFO L225 Difference]: With dead ends: 60982 [2021-02-19 18:53:55,162 INFO L226 Difference]: Without dead ends: 60852 [2021-02-19 18:53:55,162 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:53:55,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60852 states. [2021-02-19 18:53:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60852 to 54074. [2021-02-19 18:53:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54074 states, 54073 states have (on average 3.684777985316147) internal successors, (199247), 54073 states have internal predecessors, (199247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54074 states to 54074 states and 199247 transitions. [2021-02-19 18:53:56,481 INFO L78 Accepts]: Start accepts. Automaton has 54074 states and 199247 transitions. Word has length 30 [2021-02-19 18:53:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:56,481 INFO L480 AbstractCegarLoop]: Abstraction has 54074 states and 199247 transitions. [2021-02-19 18:53:56,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-02-19 18:53:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 54074 states and 199247 transitions. [2021-02-19 18:53:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:56,792 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:56,792 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:56,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-02-19 18:53:56,992 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:56,993 INFO L82 PathProgramCache]: Analyzing trace with hash 619431897, now seen corresponding path program 148 times [2021-02-19 18:53:56,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:56,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811053391] [2021-02-19 18:53:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:53:57,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811053391] [2021-02-19 18:53:57,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685491786] [2021-02-19 18:53:57,085 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 [2021-02-19 18:53:57,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:53:57,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:57,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:53:57,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:53:57,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:57,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-02-19 18:53:57,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707214829] [2021-02-19 18:53:57,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:53:57,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:53:57,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:53:57,259 INFO L87 Difference]: Start difference. First operand 54074 states and 199247 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-02-19 18:53:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:57,883 INFO L93 Difference]: Finished difference Result 56529 states and 205806 transitions. [2021-02-19 18:53:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:53:57,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 30 [2021-02-19 18:53:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:58,051 INFO L225 Difference]: With dead ends: 56529 [2021-02-19 18:53:58,051 INFO L226 Difference]: Without dead ends: 56368 [2021-02-19 18:53:58,051 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:53:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56368 states. [2021-02-19 18:53:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56368 to 51793. [2021-02-19 18:53:59,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51793 states, 51792 states have (on average 3.700725980846463) internal successors, (191668), 51792 states have internal predecessors, (191668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51793 states to 51793 states and 191668 transitions. [2021-02-19 18:53:59,312 INFO L78 Accepts]: Start accepts. Automaton has 51793 states and 191668 transitions. Word has length 30 [2021-02-19 18:53:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:59,312 INFO L480 AbstractCegarLoop]: Abstraction has 51793 states and 191668 transitions. [2021-02-19 18:53:59,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-02-19 18:53:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 51793 states and 191668 transitions. [2021-02-19 18:53:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:59,404 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:59,404 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:59,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-02-19 18:53:59,604 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1263266605, now seen corresponding path program 149 times [2021-02-19 18:53:59,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:59,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102937078] [2021-02-19 18:53:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:53:59,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102937078] [2021-02-19 18:53:59,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677847056] [2021-02-19 18:53:59,675 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 [2021-02-19 18:53:59,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:53:59,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:59,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:53:59,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:53:59,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:59,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 18:53:59,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936093677] [2021-02-19 18:53:59,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:53:59,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:59,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:53:59,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:53:59,850 INFO L87 Difference]: Start difference. First operand 51793 states and 191668 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-02-19 18:54:00,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:00,727 INFO L93 Difference]: Finished difference Result 57727 states and 209194 transitions. [2021-02-19 18:54:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:54:00,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 30 [2021-02-19 18:54:00,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:00,897 INFO L225 Difference]: With dead ends: 57727 [2021-02-19 18:54:00,897 INFO L226 Difference]: Without dead ends: 57713 [2021-02-19 18:54:00,897 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:54:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57713 states. [2021-02-19 18:54:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57713 to 46694. [2021-02-19 18:54:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46694 states, 46693 states have (on average 3.6757329792474245) internal successors, (171631), 46693 states have internal predecessors, (171631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46694 states to 46694 states and 171631 transitions. [2021-02-19 18:54:02,077 INFO L78 Accepts]: Start accepts. Automaton has 46694 states and 171631 transitions. Word has length 30 [2021-02-19 18:54:02,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:02,077 INFO L480 AbstractCegarLoop]: Abstraction has 46694 states and 171631 transitions. [2021-02-19 18:54:02,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-02-19 18:54:02,077 INFO L276 IsEmpty]: Start isEmpty. Operand 46694 states and 171631 transitions. [2021-02-19 18:54:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:02,158 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:02,158 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:02,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-02-19 18:54:02,359 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:02,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1126973847, now seen corresponding path program 150 times [2021-02-19 18:54:02,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:02,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151735981] [2021-02-19 18:54:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:54:02,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151735981] [2021-02-19 18:54:02,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189331974] [2021-02-19 18:54:02,430 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 [2021-02-19 18:54:02,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:54:02,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:02,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:54:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:54:02,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:02,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 18:54:02,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806357598] [2021-02-19 18:54:02,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:54:02,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:02,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:54:02,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:54:02,601 INFO L87 Difference]: Start difference. First operand 46694 states and 171631 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-02-19 18:54:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:03,102 INFO L93 Difference]: Finished difference Result 50465 states and 182435 transitions. [2021-02-19 18:54:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:54:03,104 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 30 [2021-02-19 18:54:03,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:03,257 INFO L225 Difference]: With dead ends: 50465 [2021-02-19 18:54:03,257 INFO L226 Difference]: Without dead ends: 50318 [2021-02-19 18:54:03,257 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:54:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50318 states. [2021-02-19 18:54:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50318 to 46418. [2021-02-19 18:54:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46418 states, 46417 states have (on average 3.6780705345024454) internal successors, (170725), 46417 states have internal predecessors, (170725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46418 states to 46418 states and 170725 transitions. [2021-02-19 18:54:04,420 INFO L78 Accepts]: Start accepts. Automaton has 46418 states and 170725 transitions. Word has length 30 [2021-02-19 18:54:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:04,420 INFO L480 AbstractCegarLoop]: Abstraction has 46418 states and 170725 transitions. [2021-02-19 18:54:04,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-02-19 18:54:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 46418 states and 170725 transitions. [2021-02-19 18:54:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:04,498 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:04,498 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:04,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:04,699 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:04,699 INFO L82 PathProgramCache]: Analyzing trace with hash -288132923, now seen corresponding path program 151 times [2021-02-19 18:54:04,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:04,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317546797] [2021-02-19 18:54:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:54:04,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317546797] [2021-02-19 18:54:04,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300458299] [2021-02-19 18:54:04,786 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 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 [2021-02-19 18:54:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:04,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:54:04,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:54:04,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:04,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-02-19 18:54:04,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596393503] [2021-02-19 18:54:04,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:54:04,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:04,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:54:04,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:54:04,964 INFO L87 Difference]: Start difference. First operand 46418 states and 170725 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-02-19 18:54:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:05,872 INFO L93 Difference]: Finished difference Result 49897 states and 180569 transitions. [2021-02-19 18:54:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:54:05,874 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 30 [2021-02-19 18:54:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:06,042 INFO L225 Difference]: With dead ends: 49897 [2021-02-19 18:54:06,042 INFO L226 Difference]: Without dead ends: 49814 [2021-02-19 18:54:06,042 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:54:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49814 states. [2021-02-19 18:54:07,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49814 to 46037. [2021-02-19 18:54:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46037 states, 46036 states have (on average 3.680424015987488) internal successors, (169432), 46036 states have internal predecessors, (169432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46037 states to 46037 states and 169432 transitions. [2021-02-19 18:54:07,340 INFO L78 Accepts]: Start accepts. Automaton has 46037 states and 169432 transitions. Word has length 30 [2021-02-19 18:54:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:07,340 INFO L480 AbstractCegarLoop]: Abstraction has 46037 states and 169432 transitions. [2021-02-19 18:54:07,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-02-19 18:54:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 46037 states and 169432 transitions. [2021-02-19 18:54:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:07,419 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:07,419 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:07,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:07,620 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:07,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:07,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1802160169, now seen corresponding path program 152 times [2021-02-19 18:54:07,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:07,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176717840] [2021-02-19 18:54:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:54:07,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176717840] [2021-02-19 18:54:07,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219367457] [2021-02-19 18:54:07,677 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 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 [2021-02-19 18:54:07,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:54:07,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:07,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:54:07,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:54:07,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:07,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:54:07,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738052761] [2021-02-19 18:54:07,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:54:07,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:54:07,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:54:07,844 INFO L87 Difference]: Start difference. First operand 46037 states and 169432 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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) [2021-02-19 18:54:08,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:08,356 INFO L93 Difference]: Finished difference Result 58034 states and 211506 transitions. [2021-02-19 18:54:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:54:08,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 30 [2021-02-19 18:54:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:08,532 INFO L225 Difference]: With dead ends: 58034 [2021-02-19 18:54:08,532 INFO L226 Difference]: Without dead ends: 57997 [2021-02-19 18:54:08,532 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:54:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57997 states. [2021-02-19 18:54:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57997 to 54511. [2021-02-19 18:54:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54511 states, 54510 states have (on average 3.7023298477343607) internal successors, (201814), 54510 states have internal predecessors, (201814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54511 states to 54511 states and 201814 transitions. [2021-02-19 18:54:09,858 INFO L78 Accepts]: Start accepts. Automaton has 54511 states and 201814 transitions. Word has length 30 [2021-02-19 18:54:09,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:09,859 INFO L480 AbstractCegarLoop]: Abstraction has 54511 states and 201814 transitions. [2021-02-19 18:54:09,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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) [2021-02-19 18:54:09,859 INFO L276 IsEmpty]: Start isEmpty. Operand 54511 states and 201814 transitions. [2021-02-19 18:54:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:09,949 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:09,950 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:10,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:10,150 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:10,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1528741413, now seen corresponding path program 153 times [2021-02-19 18:54:10,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:10,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904302868] [2021-02-19 18:54:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:10,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904302868] [2021-02-19 18:54:10,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707335976] [2021-02-19 18:54:10,263 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 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 [2021-02-19 18:54:10,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:54:10,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:10,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:54:10,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:54:10,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:10,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-02-19 18:54:10,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378706218] [2021-02-19 18:54:10,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:54:10,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:10,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:54:10,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:54:10,826 INFO L87 Difference]: Start difference. First operand 54511 states and 201814 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:13,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:13,735 INFO L93 Difference]: Finished difference Result 76071 states and 270587 transitions. [2021-02-19 18:54:13,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 18:54:13,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:54:13,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:13,975 INFO L225 Difference]: With dead ends: 76071 [2021-02-19 18:54:13,975 INFO L226 Difference]: Without dead ends: 76017 [2021-02-19 18:54:13,976 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=900, Invalid=3132, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 18:54:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76017 states. [2021-02-19 18:54:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76017 to 61077. [2021-02-19 18:54:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61077 states, 61076 states have (on average 3.715125417512607) internal successors, (226905), 61076 states have internal predecessors, (226905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61077 states to 61077 states and 226905 transitions. [2021-02-19 18:54:15,991 INFO L78 Accepts]: Start accepts. Automaton has 61077 states and 226905 transitions. Word has length 30 [2021-02-19 18:54:15,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:15,991 INFO L480 AbstractCegarLoop]: Abstraction has 61077 states and 226905 transitions. [2021-02-19 18:54:15,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 61077 states and 226905 transitions. [2021-02-19 18:54:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:16,114 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:16,114 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:16,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:16,315 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:16,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:16,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1536596005, now seen corresponding path program 154 times [2021-02-19 18:54:16,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:16,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918432776] [2021-02-19 18:54:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:54:16,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918432776] [2021-02-19 18:54:16,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635944131] [2021-02-19 18:54:16,377 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 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 [2021-02-19 18:54:16,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:54:16,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:16,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:54:16,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:54:16,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:16,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-02-19 18:54:16,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438056502] [2021-02-19 18:54:16,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:54:16,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:16,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:54:16,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:54:16,576 INFO L87 Difference]: Start difference. First operand 61077 states and 226905 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-02-19 18:54:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:17,209 INFO L93 Difference]: Finished difference Result 69205 states and 252584 transitions. [2021-02-19 18:54:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:54:17,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 30 [2021-02-19 18:54:17,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:17,420 INFO L225 Difference]: With dead ends: 69205 [2021-02-19 18:54:17,420 INFO L226 Difference]: Without dead ends: 69181 [2021-02-19 18:54:17,421 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:54:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69181 states. [2021-02-19 18:54:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69181 to 61746. [2021-02-19 18:54:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61746 states, 61745 states have (on average 3.7093691796906634) internal successors, (229035), 61745 states have internal predecessors, (229035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61746 states to 61746 states and 229035 transitions. [2021-02-19 18:54:19,302 INFO L78 Accepts]: Start accepts. Automaton has 61746 states and 229035 transitions. Word has length 30 [2021-02-19 18:54:19,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:19,302 INFO L480 AbstractCegarLoop]: Abstraction has 61746 states and 229035 transitions. [2021-02-19 18:54:19,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-02-19 18:54:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 61746 states and 229035 transitions. [2021-02-19 18:54:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:19,430 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:19,430 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:19,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:19,634 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:19,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:19,634 INFO L82 PathProgramCache]: Analyzing trace with hash -45745957, now seen corresponding path program 155 times [2021-02-19 18:54:19,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:19,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995176452] [2021-02-19 18:54:19,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:54:19,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995176452] [2021-02-19 18:54:19,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593976618] [2021-02-19 18:54:19,679 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 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 [2021-02-19 18:54:19,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:54:19,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:19,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:54:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:54:19,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:19,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 18:54:19,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650834144] [2021-02-19 18:54:19,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:54:19,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:19,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:54:19,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:54:19,777 INFO L87 Difference]: Start difference. First operand 61746 states and 229035 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-02-19 18:54:20,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:20,381 INFO L93 Difference]: Finished difference Result 68985 states and 251648 transitions. [2021-02-19 18:54:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:54:20,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 30 [2021-02-19 18:54:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:20,600 INFO L225 Difference]: With dead ends: 68985 [2021-02-19 18:54:20,600 INFO L226 Difference]: Without dead ends: 68907 [2021-02-19 18:54:20,600 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:54:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68907 states. [2021-02-19 18:54:21,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68907 to 61549. [2021-02-19 18:54:21,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61549 states, 61548 states have (on average 3.703434717618769) internal successors, (227939), 61548 states have internal predecessors, (227939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61549 states to 61549 states and 227939 transitions. [2021-02-19 18:54:22,201 INFO L78 Accepts]: Start accepts. Automaton has 61549 states and 227939 transitions. Word has length 30 [2021-02-19 18:54:22,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:22,201 INFO L480 AbstractCegarLoop]: Abstraction has 61549 states and 227939 transitions. [2021-02-19 18:54:22,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-02-19 18:54:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand 61549 states and 227939 transitions. [2021-02-19 18:54:22,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:54:22,327 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:22,327 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:22,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:22,528 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:22,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1926433995, now seen corresponding path program 156 times [2021-02-19 18:54:22,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:22,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785205124] [2021-02-19 18:54:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:54:22,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785205124] [2021-02-19 18:54:22,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704618859] [2021-02-19 18:54:22,590 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 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 [2021-02-19 18:54:22,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:54:22,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:22,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:54:22,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:54:22,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:22,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:54:22,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175528866] [2021-02-19 18:54:22,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:54:22,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:22,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:54:22,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:54:22,798 INFO L87 Difference]: Start difference. First operand 61549 states and 227939 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-02-19 18:54:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:23,699 INFO L93 Difference]: Finished difference Result 87148 states and 316679 transitions. [2021-02-19 18:54:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:54:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 32 [2021-02-19 18:54:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:23,987 INFO L225 Difference]: With dead ends: 87148 [2021-02-19 18:54:23,987 INFO L226 Difference]: Without dead ends: 87117 [2021-02-19 18:54:23,987 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:54:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87117 states. [2021-02-19 18:54:25,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87117 to 74655. [2021-02-19 18:54:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74655 states, 74654 states have (on average 3.7167064055509416) internal successors, (277467), 74654 states have internal predecessors, (277467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74655 states to 74655 states and 277467 transitions. [2021-02-19 18:54:26,280 INFO L78 Accepts]: Start accepts. Automaton has 74655 states and 277467 transitions. Word has length 32 [2021-02-19 18:54:26,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:26,281 INFO L480 AbstractCegarLoop]: Abstraction has 74655 states and 277467 transitions. [2021-02-19 18:54:26,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-02-19 18:54:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 74655 states and 277467 transitions. [2021-02-19 18:54:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:54:26,433 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:26,433 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:26,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-02-19 18:54:26,633 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash -102703529, now seen corresponding path program 157 times [2021-02-19 18:54:26,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:26,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216300236] [2021-02-19 18:54:26,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:54:26,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216300236] [2021-02-19 18:54:26,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592379552] [2021-02-19 18:54:26,696 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 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 [2021-02-19 18:54:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:26,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:54:26,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:54:26,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:26,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 18:54:26,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832316757] [2021-02-19 18:54:26,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:54:26,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:26,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:54:26,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:54:26,920 INFO L87 Difference]: Start difference. First operand 74655 states and 277467 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) [2021-02-19 18:54:30,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:30,183 INFO L93 Difference]: Finished difference Result 126973 states and 451879 transitions. [2021-02-19 18:54:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 18:54:30,185 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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 32 [2021-02-19 18:54:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:30,624 INFO L225 Difference]: With dead ends: 126973 [2021-02-19 18:54:30,625 INFO L226 Difference]: Without dead ends: 126092 [2021-02-19 18:54:30,625 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=660, Invalid=2310, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:54:30,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126092 states. [2021-02-19 18:54:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126092 to 81796. [2021-02-19 18:54:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81796 states, 81795 states have (on average 3.726902622409683) internal successors, (304842), 81795 states have internal predecessors, (304842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81796 states to 81796 states and 304842 transitions. [2021-02-19 18:54:33,552 INFO L78 Accepts]: Start accepts. Automaton has 81796 states and 304842 transitions. Word has length 32 [2021-02-19 18:54:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:33,552 INFO L480 AbstractCegarLoop]: Abstraction has 81796 states and 304842 transitions. [2021-02-19 18:54:33,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) [2021-02-19 18:54:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 81796 states and 304842 transitions. [2021-02-19 18:54:33,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:54:33,730 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:33,730 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:33,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-02-19 18:54:33,931 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:33,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:33,931 INFO L82 PathProgramCache]: Analyzing trace with hash -476712857, now seen corresponding path program 158 times [2021-02-19 18:54:33,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:33,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017342373] [2021-02-19 18:54:33,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:54:34,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017342373] [2021-02-19 18:54:34,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42387648] [2021-02-19 18:54:34,008 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 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 [2021-02-19 18:54:34,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:54:34,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:34,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:54:34,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:54:34,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:34,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-02-19 18:54:34,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138686359] [2021-02-19 18:54:34,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:54:34,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:34,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:54:34,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:54:34,245 INFO L87 Difference]: Start difference. First operand 81796 states and 304842 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-02-19 18:54:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:38,708 INFO L93 Difference]: Finished difference Result 103823 states and 367181 transitions. [2021-02-19 18:54:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 18:54:38,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 32 [2021-02-19 18:54:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:39,298 INFO L225 Difference]: With dead ends: 103823 [2021-02-19 18:54:39,298 INFO L226 Difference]: Without dead ends: 102463 [2021-02-19 18:54:39,299 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1264, Invalid=4898, Unknown=0, NotChecked=0, Total=6162 [2021-02-19 18:54:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102463 states. [2021-02-19 18:54:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102463 to 81213. [2021-02-19 18:54:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81213 states, 81212 states have (on average 3.721420479732059) internal successors, (302224), 81212 states have internal predecessors, (302224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81213 states to 81213 states and 302224 transitions. [2021-02-19 18:54:41,614 INFO L78 Accepts]: Start accepts. Automaton has 81213 states and 302224 transitions. Word has length 32 [2021-02-19 18:54:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:41,614 INFO L480 AbstractCegarLoop]: Abstraction has 81213 states and 302224 transitions. [2021-02-19 18:54:41,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-02-19 18:54:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 81213 states and 302224 transitions. [2021-02-19 18:54:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:54:41,786 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:41,786 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:41,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-02-19 18:54:41,986 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1606190371, now seen corresponding path program 159 times [2021-02-19 18:54:41,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:41,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928744358] [2021-02-19 18:54:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:54:42,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928744358] [2021-02-19 18:54:42,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760311695] [2021-02-19 18:54:42,437 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 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 [2021-02-19 18:54:42,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:54:42,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:54:42,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:54:42,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:42,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 18:54:42,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323348206] [2021-02-19 18:54:42,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:54:42,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:42,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:54:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:54:42,692 INFO L87 Difference]: Start difference. First operand 81213 states and 302224 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-02-19 18:54:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:43,415 INFO L93 Difference]: Finished difference Result 89727 states and 327410 transitions. [2021-02-19 18:54:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:54:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 32 [2021-02-19 18:54:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:43,671 INFO L225 Difference]: With dead ends: 89727 [2021-02-19 18:54:43,671 INFO L226 Difference]: Without dead ends: 89463 [2021-02-19 18:54:43,672 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:54:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89463 states. [2021-02-19 18:54:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89463 to 81093. [2021-02-19 18:54:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81093 states, 81092 states have (on average 3.7186035613870665) internal successors, (301549), 81092 states have internal predecessors, (301549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81093 states to 81093 states and 301549 transitions. [2021-02-19 18:54:46,150 INFO L78 Accepts]: Start accepts. Automaton has 81093 states and 301549 transitions. Word has length 32 [2021-02-19 18:54:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:46,150 INFO L480 AbstractCegarLoop]: Abstraction has 81093 states and 301549 transitions. [2021-02-19 18:54:46,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-02-19 18:54:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 81093 states and 301549 transitions. [2021-02-19 18:54:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:54:46,325 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:46,325 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:46,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-02-19 18:54:46,525 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:46,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:46,526 INFO L82 PathProgramCache]: Analyzing trace with hash 542785103, now seen corresponding path program 160 times [2021-02-19 18:54:46,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:46,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620346866] [2021-02-19 18:54:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:54:46,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620346866] [2021-02-19 18:54:46,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991141628] [2021-02-19 18:54:46,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:54:46,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:54:46,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:46,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:54:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 18:54:46,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:46,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 18:54:46,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987008962] [2021-02-19 18:54:46,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:54:46,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:46,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:54:46,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:54:46,794 INFO L87 Difference]: Start difference. First operand 81093 states and 301549 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-02-19 18:54:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:47,536 INFO L93 Difference]: Finished difference Result 95050 states and 344724 transitions. [2021-02-19 18:54:47,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:54:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 32 [2021-02-19 18:54:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:47,841 INFO L225 Difference]: With dead ends: 95050 [2021-02-19 18:54:47,841 INFO L226 Difference]: Without dead ends: 94988 [2021-02-19 18:54:47,841 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:54:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94988 states. [2021-02-19 18:54:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94988 to 80568. [2021-02-19 18:54:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80568 states, 80567 states have (on average 3.7057604230019736) internal successors, (298562), 80567 states have internal predecessors, (298562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:50,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80568 states to 80568 states and 298562 transitions. [2021-02-19 18:54:50,299 INFO L78 Accepts]: Start accepts. Automaton has 80568 states and 298562 transitions. Word has length 32 [2021-02-19 18:54:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:50,299 INFO L480 AbstractCegarLoop]: Abstraction has 80568 states and 298562 transitions. [2021-02-19 18:54:50,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-02-19 18:54:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 80568 states and 298562 transitions. [2021-02-19 18:54:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:54:50,472 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:50,472 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:50,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:50,673 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1145487257, now seen corresponding path program 161 times [2021-02-19 18:54:50,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:50,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440450888] [2021-02-19 18:54:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:54:50,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440450888] [2021-02-19 18:54:50,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102613285] [2021-02-19 18:54:50,765 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 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 [2021-02-19 18:54:50,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:54:50,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:50,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:54:50,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 18:54:51,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:51,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-02-19 18:54:51,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498061783] [2021-02-19 18:54:51,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:54:51,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:51,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:54:51,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:54:51,040 INFO L87 Difference]: Start difference. First operand 80568 states and 298562 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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) [2021-02-19 18:54:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:53,267 INFO L93 Difference]: Finished difference Result 137312 states and 490128 transitions. [2021-02-19 18:54:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:54:53,269 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 32 [2021-02-19 18:54:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:53,758 INFO L225 Difference]: With dead ends: 137312 [2021-02-19 18:54:53,758 INFO L226 Difference]: Without dead ends: 137132 [2021-02-19 18:54:53,758 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:54:53,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137132 states. [2021-02-19 18:54:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137132 to 97897. [2021-02-19 18:54:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97897 states, 97896 states have (on average 3.721204135000409) internal successors, (364291), 97896 states have internal predecessors, (364291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97897 states to 97897 states and 364291 transitions. [2021-02-19 18:54:56,836 INFO L78 Accepts]: Start accepts. Automaton has 97897 states and 364291 transitions. Word has length 32 [2021-02-19 18:54:56,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:56,836 INFO L480 AbstractCegarLoop]: Abstraction has 97897 states and 364291 transitions. [2021-02-19 18:54:56,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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) [2021-02-19 18:54:56,836 INFO L276 IsEmpty]: Start isEmpty. Operand 97897 states and 364291 transitions. [2021-02-19 18:54:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:54:57,044 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:57,044 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:57,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-02-19 18:54:57,245 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:57,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1211579843, now seen corresponding path program 162 times [2021-02-19 18:54:57,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:57,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841090760] [2021-02-19 18:54:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:54:57,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841090760] [2021-02-19 18:54:57,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045069928] [2021-02-19 18:54:57,312 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 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 [2021-02-19 18:54:57,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:54:57,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:57,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:54:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:54:57,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:57,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 18:54:57,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256049869] [2021-02-19 18:54:57,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:54:57,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:57,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:54:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:54:57,540 INFO L87 Difference]: Start difference. First operand 97897 states and 364291 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:00,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:00,647 INFO L93 Difference]: Finished difference Result 144885 states and 519929 transitions. [2021-02-19 18:55:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 18:55:00,648 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:55:00,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:01,189 INFO L225 Difference]: With dead ends: 144885 [2021-02-19 18:55:01,189 INFO L226 Difference]: Without dead ends: 144573 [2021-02-19 18:55:01,189 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=688, Invalid=2392, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:55:01,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144573 states. [2021-02-19 18:55:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144573 to 114379. [2021-02-19 18:55:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114379 states, 114378 states have (on average 3.7425029288849254) internal successors, (428060), 114378 states have internal predecessors, (428060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114379 states to 114379 states and 428060 transitions. [2021-02-19 18:55:05,440 INFO L78 Accepts]: Start accepts. Automaton has 114379 states and 428060 transitions. Word has length 32 [2021-02-19 18:55:05,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:05,441 INFO L480 AbstractCegarLoop]: Abstraction has 114379 states and 428060 transitions. [2021-02-19 18:55:05,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:05,441 INFO L276 IsEmpty]: Start isEmpty. Operand 114379 states and 428060 transitions. [2021-02-19 18:55:05,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:55:05,688 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:05,688 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:05,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:05,888 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:05,889 INFO L82 PathProgramCache]: Analyzing trace with hash -377552293, now seen corresponding path program 163 times [2021-02-19 18:55:05,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:05,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982028232] [2021-02-19 18:55:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:55:06,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982028232] [2021-02-19 18:55:06,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432560818] [2021-02-19 18:55:06,014 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 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 [2021-02-19 18:55:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:06,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:55:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:55:06,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:06,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-02-19 18:55:06,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795828869] [2021-02-19 18:55:06,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:55:06,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:06,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:55:06,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:55:06,306 INFO L87 Difference]: Start difference. First operand 114379 states and 428060 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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) [2021-02-19 18:55:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:11,527 INFO L93 Difference]: Finished difference Result 145887 states and 519027 transitions. [2021-02-19 18:55:11,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 18:55:11,530 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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 32 [2021-02-19 18:55:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:12,101 INFO L225 Difference]: With dead ends: 145887 [2021-02-19 18:55:12,101 INFO L226 Difference]: Without dead ends: 144953 [2021-02-19 18:55:12,102 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1225, Invalid=4937, Unknown=0, NotChecked=0, Total=6162 [2021-02-19 18:55:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144953 states. [2021-02-19 18:55:15,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144953 to 114129. [2021-02-19 18:55:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114129 states, 114128 states have (on average 3.7392051030421984) internal successors, (426748), 114128 states have internal predecessors, (426748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114129 states to 114129 states and 426748 transitions. [2021-02-19 18:55:15,680 INFO L78 Accepts]: Start accepts. Automaton has 114129 states and 426748 transitions. Word has length 32 [2021-02-19 18:55:15,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:15,680 INFO L480 AbstractCegarLoop]: Abstraction has 114129 states and 426748 transitions. [2021-02-19 18:55:15,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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) [2021-02-19 18:55:15,680 INFO L276 IsEmpty]: Start isEmpty. Operand 114129 states and 426748 transitions. [2021-02-19 18:55:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 18:55:16,503 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:16,503 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:16,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:16,704 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:16,704 INFO L82 PathProgramCache]: Analyzing trace with hash 36142229, now seen corresponding path program 164 times [2021-02-19 18:55:16,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:16,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55860589] [2021-02-19 18:55:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:55:16,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55860589] [2021-02-19 18:55:16,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359081392] [2021-02-19 18:55:16,816 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 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 [2021-02-19 18:55:16,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:55:16,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:16,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:55:16,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:55:17,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:17,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-02-19 18:55:17,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316271886] [2021-02-19 18:55:17,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:55:17,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:17,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:55:17,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:55:17,120 INFO L87 Difference]: Start difference. First operand 114129 states and 426748 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:19,599 INFO L93 Difference]: Finished difference Result 131239 states and 477233 transitions. [2021-02-19 18:55:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:55:19,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 18:55:19,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:20,068 INFO L225 Difference]: With dead ends: 131239 [2021-02-19 18:55:20,068 INFO L226 Difference]: Without dead ends: 130909 [2021-02-19 18:55:20,069 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=460, Invalid=1610, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:55:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130909 states. [2021-02-19 18:55:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130909 to 114599. [2021-02-19 18:55:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114599 states, 114598 states have (on average 3.7350041012932165) internal successors, (428024), 114598 states have internal predecessors, (428024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114599 states to 114599 states and 428024 transitions. [2021-02-19 18:55:24,067 INFO L78 Accepts]: Start accepts. Automaton has 114599 states and 428024 transitions. Word has length 32 [2021-02-19 18:55:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:24,067 INFO L480 AbstractCegarLoop]: Abstraction has 114599 states and 428024 transitions. [2021-02-19 18:55:24,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 114599 states and 428024 transitions. [2021-02-19 18:55:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:55:24,332 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:24,332 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:24,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:24,532 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:24,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:24,533 INFO L82 PathProgramCache]: Analyzing trace with hash 495594241, now seen corresponding path program 165 times [2021-02-19 18:55:24,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:24,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076737591] [2021-02-19 18:55:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:24,893 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 18:55:25,148 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 18:55:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:25,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076737591] [2021-02-19 18:55:25,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937489401] [2021-02-19 18:55:25,497 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 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 [2021-02-19 18:55:25,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:55:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:25,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:55:25,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:27,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-02-19 18:55:27,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:27,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:27,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-02-19 18:55:27,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:90 [2021-02-19 18:55:27,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-02-19 18:55:27,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:27,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:27,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-02-19 18:55:27,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:90 [2021-02-19 18:55:27,897 INFO L446 ElimStorePlain]: Different costs {0=[v_C_222], 5=[B], 9=[A]} [2021-02-19 18:55:27,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 18:55:27,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:27,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:28,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:28,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 71 [2021-02-19 18:55:28,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:55:28,616 WARN L202 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-02-19 18:55:28,618 INFO L628 ElimStorePlain]: treesize reduction 135, result has 43.5 percent of original size [2021-02-19 18:55:28,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:28,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:28,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:28,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 74 treesize of output 90 [2021-02-19 18:56:16,283 WARN L202 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 4538 DAG size of output: 4308