/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 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:36:43,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:36:43,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:36:43,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 23:36:43,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 23:36:43,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 23:36:43,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 23:36:43,756 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 23:36:43,777 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:36:43,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:36:43,777 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:36:43,777 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:36:43,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:36:43,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:36:43,779 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:36:43,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:36:43,780 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:36:43,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:36:43,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:36:43,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:36:43,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:36:43,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:36:43,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:36:43,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:36:43,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:36:43,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:36:43,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:36:43,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:36:43,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:36:43,781 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:36:43,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:36:43,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:36:43,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:36:43,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:36:43,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:36:43,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:36:43,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:36:43,782 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:36:43,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:36:43,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:36:44,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:36:44,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:36:44,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:36:44,065 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:36:44,067 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:36:44,068 INFO L432 ainManager$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 [2021-03-10 23:36:44,068 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' [2021-03-10 23:36:44,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:36:44,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:36:44,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:36:44,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:36:44,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:36:44,111 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 10.03 11:36:44" (1/1) ... [2021-03-10 23:36:44,117 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 10.03 11:36:44" (1/1) ... [2021-03-10 23:36:44,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:36:44,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:36:44,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:36:44,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:36:44,130 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 10.03 11:36:44" (1/1) ... [2021-03-10 23:36:44,130 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 10.03 11:36:44" (1/1) ... [2021-03-10 23:36:44,131 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 10.03 11:36:44" (1/1) ... [2021-03-10 23:36:44,132 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 10.03 11:36:44" (1/1) ... [2021-03-10 23:36:44,135 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 10.03 11:36:44" (1/1) ... [2021-03-10 23:36:44,137 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 10.03 11:36:44" (1/1) ... [2021-03-10 23:36:44,138 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 10.03 11:36:44" (1/1) ... [2021-03-10 23:36:44,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:36:44,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:36:44,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:36:44,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:36:44,147 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 10.03 11:36:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:36:44,205 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:36:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:36:44,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:36:44,206 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:36:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:36:44,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:36:44,206 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:36:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:36:44,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:36:44,206 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 23:36:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 23:36:44,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 23:36:44,208 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 23:36:44,372 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:36:44,372 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 23:36:44,373 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:36:44 BoogieIcfgContainer [2021-03-10 23:36:44,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:36:44,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:36:44,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:36:44,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:36:44,377 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 10.03 11:36:44" (1/2) ... [2021-03-10 23:36:44,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae764a2 and model type three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:36:44, skipping insertion in model container [2021-03-10 23:36:44,378 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 10.03 11:36:44" (2/2) ... [2021-03-10 23:36:44,379 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum-alt.wvr.bpl [2021-03-10 23:36:44,383 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:36:44,383 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:36:44,386 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:36:44,386 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:36:44,410 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 23:36:44,421 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 23:36:44,432 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:36:44,432 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:36:44,433 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:36:44,433 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:36:44,433 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:36:44,433 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:36:44,433 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:36:44,433 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:36:44,439 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 78 flow [2021-03-10 23:36:44,452 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) [2021-03-10 23:36:44,454 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) [2021-03-10 23:36:44,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 23:36:44,459 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:44,460 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:44,460 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:44,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:44,463 INFO L82 PathProgramCache]: Analyzing trace with hash -221348590, now seen corresponding path program 1 times [2021-03-10 23:36:44,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:44,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859056506] [2021-03-10 23:36:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:44,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859056506] [2021-03-10 23:36:44,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:36:44,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 23:36:44,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831782709] [2021-03-10 23:36:44,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:36:44,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:44,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:36:44,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:36:44,643 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) [2021-03-10 23:36:44,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:44,680 INFO L93 Difference]: Finished difference Result 215 states and 615 transitions. [2021-03-10 23:36:44,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:36:44,681 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 [2021-03-10 23:36:44,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:44,690 INFO L225 Difference]: With dead ends: 215 [2021-03-10 23:36:44,690 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 23:36:44,691 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:36:44,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 23:36:44,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2021-03-10 23:36:44,724 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) [2021-03-10 23:36:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 417 transitions. [2021-03-10 23:36:44,727 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 417 transitions. Word has length 16 [2021-03-10 23:36:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:44,727 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 417 transitions. [2021-03-10 23:36:44,727 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) [2021-03-10 23:36:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 417 transitions. [2021-03-10 23:36:44,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:36:44,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:44,729 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:44,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:36:44,730 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:44,730 INFO L82 PathProgramCache]: Analyzing trace with hash -502535438, now seen corresponding path program 1 times [2021-03-10 23:36:44,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:44,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399844984] [2021-03-10 23:36:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:44,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399844984] [2021-03-10 23:36:44,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542317000] [2021-03-10 23:36:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:44,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 23:36:44,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:44,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:44,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-03-10 23:36:44,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209026238] [2021-03-10 23:36:44,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:36:44,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:36:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:36:44,885 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) [2021-03-10 23:36:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:44,953 INFO L93 Difference]: Finished difference Result 345 states and 956 transitions. [2021-03-10 23:36:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:36:44,954 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 [2021-03-10 23:36:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:44,957 INFO L225 Difference]: With dead ends: 345 [2021-03-10 23:36:44,957 INFO L226 Difference]: Without dead ends: 345 [2021-03-10 23:36:44,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:36:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-03-10 23:36:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 174. [2021-03-10 23:36:44,971 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) [2021-03-10 23:36:44,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 511 transitions. [2021-03-10 23:36:44,973 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 511 transitions. Word has length 18 [2021-03-10 23:36:44,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:44,973 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 511 transitions. [2021-03-10 23:36:44,973 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) [2021-03-10 23:36:44,973 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 511 transitions. [2021-03-10 23:36:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:36:44,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:44,974 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:45,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 23:36:45,190 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:45,190 INFO L82 PathProgramCache]: Analyzing trace with hash -443832396, now seen corresponding path program 1 times [2021-03-10 23:36:45,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:45,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173353326] [2021-03-10 23:36:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:45,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173353326] [2021-03-10 23:36:45,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:36:45,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:36:45,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901194195] [2021-03-10 23:36:45,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:36:45,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:45,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:36:45,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:36:45,254 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) [2021-03-10 23:36:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:45,295 INFO L93 Difference]: Finished difference Result 242 states and 652 transitions. [2021-03-10 23:36:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:36:45,296 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 [2021-03-10 23:36:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:45,297 INFO L225 Difference]: With dead ends: 242 [2021-03-10 23:36:45,297 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 23:36:45,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:36:45,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 23:36:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 190. [2021-03-10 23:36:45,306 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) [2021-03-10 23:36:45,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 537 transitions. [2021-03-10 23:36:45,307 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 537 transitions. Word has length 18 [2021-03-10 23:36:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:45,307 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 537 transitions. [2021-03-10 23:36:45,307 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) [2021-03-10 23:36:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 537 transitions. [2021-03-10 23:36:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:36:45,308 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:45,308 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:45,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 23:36:45,309 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:45,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1106549168, now seen corresponding path program 1 times [2021-03-10 23:36:45,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:45,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955694386] [2021-03-10 23:36:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:45,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955694386] [2021-03-10 23:36:45,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:36:45,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:36:45,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952834513] [2021-03-10 23:36:45,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:36:45,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:45,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:36:45,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:36:45,341 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) [2021-03-10 23:36:45,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:45,383 INFO L93 Difference]: Finished difference Result 325 states and 890 transitions. [2021-03-10 23:36:45,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:36:45,383 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 [2021-03-10 23:36:45,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:45,386 INFO L225 Difference]: With dead ends: 325 [2021-03-10 23:36:45,386 INFO L226 Difference]: Without dead ends: 307 [2021-03-10 23:36:45,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:36:45,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-03-10 23:36:45,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 235. [2021-03-10 23:36:45,407 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) [2021-03-10 23:36:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 677 transitions. [2021-03-10 23:36:45,408 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 677 transitions. Word has length 18 [2021-03-10 23:36:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:45,408 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 677 transitions. [2021-03-10 23:36:45,408 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) [2021-03-10 23:36:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 677 transitions. [2021-03-10 23:36:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:36:45,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:45,413 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:45,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 23:36:45,413 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:45,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:45,414 INFO L82 PathProgramCache]: Analyzing trace with hash -471494800, now seen corresponding path program 2 times [2021-03-10 23:36:45,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:45,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063752156] [2021-03-10 23:36:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:45,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063752156] [2021-03-10 23:36:45,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:36:45,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 23:36:45,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621888861] [2021-03-10 23:36:45,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:36:45,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:36:45,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:36:45,452 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) [2021-03-10 23:36:45,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:45,486 INFO L93 Difference]: Finished difference Result 277 states and 750 transitions. [2021-03-10 23:36:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:36:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 23:36:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:45,487 INFO L225 Difference]: With dead ends: 277 [2021-03-10 23:36:45,488 INFO L226 Difference]: Without dead ends: 265 [2021-03-10 23:36:45,488 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:36:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-03-10 23:36:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2021-03-10 23:36:45,492 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) [2021-03-10 23:36:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 598 transitions. [2021-03-10 23:36:45,493 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 598 transitions. Word has length 18 [2021-03-10 23:36:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:45,494 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 598 transitions. [2021-03-10 23:36:45,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:36:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 598 transitions. [2021-03-10 23:36:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:36:45,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:45,495 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:45,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 23:36:45,495 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:45,496 INFO L82 PathProgramCache]: Analyzing trace with hash 94645266, now seen corresponding path program 2 times [2021-03-10 23:36:45,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:45,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183928833] [2021-03-10 23:36:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:45,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183928833] [2021-03-10 23:36:45,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:36:45,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:36:45,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82646473] [2021-03-10 23:36:45,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:36:45,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:36:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:36:45,535 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) [2021-03-10 23:36:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:45,580 INFO L93 Difference]: Finished difference Result 275 states and 762 transitions. [2021-03-10 23:36:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:36:45,580 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 [2021-03-10 23:36:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:45,581 INFO L225 Difference]: With dead ends: 275 [2021-03-10 23:36:45,581 INFO L226 Difference]: Without dead ends: 261 [2021-03-10 23:36:45,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:36:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-03-10 23:36:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 215. [2021-03-10 23:36:45,587 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) [2021-03-10 23:36:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 610 transitions. [2021-03-10 23:36:45,588 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 610 transitions. Word has length 18 [2021-03-10 23:36:45,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:45,588 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 610 transitions. [2021-03-10 23:36:45,588 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) [2021-03-10 23:36:45,588 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 610 transitions. [2021-03-10 23:36:45,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:36:45,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:45,591 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:45,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 23:36:45,592 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:45,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:45,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1521986286, now seen corresponding path program 3 times [2021-03-10 23:36:45,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:45,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514299777] [2021-03-10 23:36:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:45,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514299777] [2021-03-10 23:36:45,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:36:45,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:36:45,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698928783] [2021-03-10 23:36:45,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:36:45,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:45,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:36:45,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:36:45,633 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) [2021-03-10 23:36:45,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:45,652 INFO L93 Difference]: Finished difference Result 222 states and 635 transitions. [2021-03-10 23:36:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:36:45,652 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 [2021-03-10 23:36:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:45,654 INFO L225 Difference]: With dead ends: 222 [2021-03-10 23:36:45,654 INFO L226 Difference]: Without dead ends: 222 [2021-03-10 23:36:45,654 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:36:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-03-10 23:36:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2021-03-10 23:36:45,658 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) [2021-03-10 23:36:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 608 transitions. [2021-03-10 23:36:45,659 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 608 transitions. Word has length 18 [2021-03-10 23:36:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:45,660 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 608 transitions. [2021-03-10 23:36:45,660 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) [2021-03-10 23:36:45,660 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 608 transitions. [2021-03-10 23:36:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:36:45,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:45,660 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:45,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 23:36:45,661 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:45,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:45,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1597316976, now seen corresponding path program 4 times [2021-03-10 23:36:45,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:45,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936475514] [2021-03-10 23:36:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:45,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936475514] [2021-03-10 23:36:45,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:36:45,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:36:45,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050486570] [2021-03-10 23:36:45,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:36:45,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:45,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:36:45,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:36:45,696 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) [2021-03-10 23:36:45,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:45,713 INFO L93 Difference]: Finished difference Result 226 states and 656 transitions. [2021-03-10 23:36:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:36:45,714 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 [2021-03-10 23:36:45,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:45,715 INFO L225 Difference]: With dead ends: 226 [2021-03-10 23:36:45,715 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 23:36:45,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:36:45,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 23:36:45,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 215. [2021-03-10 23:36:45,719 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) [2021-03-10 23:36:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-03-10 23:36:45,720 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 18 [2021-03-10 23:36:45,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:45,720 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-03-10 23:36:45,720 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) [2021-03-10 23:36:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-03-10 23:36:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:36:45,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:45,721 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:45,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 23:36:45,721 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:45,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:45,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1128775952, now seen corresponding path program 5 times [2021-03-10 23:36:45,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:45,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273518269] [2021-03-10 23:36:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:45,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273518269] [2021-03-10 23:36:45,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:36:45,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 23:36:45,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300735317] [2021-03-10 23:36:45,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:36:45,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:45,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:36:45,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:36:45,748 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) [2021-03-10 23:36:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:45,772 INFO L93 Difference]: Finished difference Result 212 states and 606 transitions. [2021-03-10 23:36:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:36:45,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 23:36:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:45,774 INFO L225 Difference]: With dead ends: 212 [2021-03-10 23:36:45,774 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 23:36:45,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:36:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 23:36:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2021-03-10 23:36:45,777 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) [2021-03-10 23:36:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 560 transitions. [2021-03-10 23:36:45,778 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 560 transitions. Word has length 18 [2021-03-10 23:36:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:45,778 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 560 transitions. [2021-03-10 23:36:45,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:36:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 560 transitions. [2021-03-10 23:36:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:36:45,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:45,779 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:45,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 23:36:45,779 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:45,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:45,780 INFO L82 PathProgramCache]: Analyzing trace with hash -81453676, now seen corresponding path program 1 times [2021-03-10 23:36:45,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:45,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912757772] [2021-03-10 23:36:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:45,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912757772] [2021-03-10 23:36:45,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883629476] [2021-03-10 23:36:45,802 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 [2021-03-10 23:36:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:45,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 23:36:45,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:45,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:45,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-03-10 23:36:45,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107006273] [2021-03-10 23:36:45,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:36:45,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:45,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:36:45,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:36:45,878 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) [2021-03-10 23:36:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:45,921 INFO L93 Difference]: Finished difference Result 251 states and 729 transitions. [2021-03-10 23:36:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:36:45,922 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 [2021-03-10 23:36:45,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:45,924 INFO L225 Difference]: With dead ends: 251 [2021-03-10 23:36:45,924 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 23:36:45,924 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:36:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 23:36:45,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 191. [2021-03-10 23:36:45,929 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) [2021-03-10 23:36:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 551 transitions. [2021-03-10 23:36:45,929 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 551 transitions. Word has length 20 [2021-03-10 23:36:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:45,930 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 551 transitions. [2021-03-10 23:36:45,930 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) [2021-03-10 23:36:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 551 transitions. [2021-03-10 23:36:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:36:45,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:45,930 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:46,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 23:36:46,146 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:46,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1893391950, now seen corresponding path program 1 times [2021-03-10 23:36:46,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:46,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96663648] [2021-03-10 23:36:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:46,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96663648] [2021-03-10 23:36:46,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252835772] [2021-03-10 23:36:46,211 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 [2021-03-10 23:36:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:46,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:36:46,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:46,382 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 [2021-03-10 23:36:46,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:46,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:46,388 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 13 treesize of output 9 [2021-03-10 23:36:46,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:46,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:46,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:46,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:20, output treesize:5 [2021-03-10 23:36:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:46,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:46,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 23:36:46,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775343320] [2021-03-10 23:36:46,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:36:46,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:46,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:36:46,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:36:46,421 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) [2021-03-10 23:36:46,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:46,485 INFO L93 Difference]: Finished difference Result 377 states and 1096 transitions. [2021-03-10 23:36:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:36:46,485 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 [2021-03-10 23:36:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:46,487 INFO L225 Difference]: With dead ends: 377 [2021-03-10 23:36:46,487 INFO L226 Difference]: Without dead ends: 362 [2021-03-10 23:36:46,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:36:46,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-03-10 23:36:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 270. [2021-03-10 23:36:46,493 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) [2021-03-10 23:36:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 796 transitions. [2021-03-10 23:36:46,493 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 796 transitions. Word has length 22 [2021-03-10 23:36:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:46,494 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 796 transitions. [2021-03-10 23:36:46,494 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) [2021-03-10 23:36:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 796 transitions. [2021-03-10 23:36:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:36:46,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:46,495 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:46,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 23:36:46,712 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:46,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:46,713 INFO L82 PathProgramCache]: Analyzing trace with hash 373177330, now seen corresponding path program 2 times [2021-03-10 23:36:46,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:46,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450809257] [2021-03-10 23:36:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:46,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450809257] [2021-03-10 23:36:46,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275205997] [2021-03-10 23:36:46,805 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) [2021-03-10 23:36:46,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:36:46,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:46,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:36:46,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:46,918 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 [2021-03-10 23:36:46,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:46,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:46,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:46,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2021-03-10 23:36:46,953 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 [2021-03-10 23:36:46,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:46,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:46,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:46,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-03-10 23:36:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:46,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:46,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 23:36:46,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467839259] [2021-03-10 23:36:46,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:36:46,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:46,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:36:46,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:36:46,984 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) [2021-03-10 23:36:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:47,061 INFO L93 Difference]: Finished difference Result 402 states and 1185 transitions. [2021-03-10 23:36:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:36:47,062 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 [2021-03-10 23:36:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:47,064 INFO L225 Difference]: With dead ends: 402 [2021-03-10 23:36:47,064 INFO L226 Difference]: Without dead ends: 387 [2021-03-10 23:36:47,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:36:47,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-03-10 23:36:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 294. [2021-03-10 23:36:47,070 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) [2021-03-10 23:36:47,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 868 transitions. [2021-03-10 23:36:47,071 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 868 transitions. Word has length 22 [2021-03-10 23:36:47,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:47,072 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 868 transitions. [2021-03-10 23:36:47,072 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) [2021-03-10 23:36:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 868 transitions. [2021-03-10 23:36:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:36:47,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:47,073 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:47,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:47,289 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:47,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:47,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1309111346, now seen corresponding path program 3 times [2021-03-10 23:36:47,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:47,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982800926] [2021-03-10 23:36:47,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:47,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982800926] [2021-03-10 23:36:47,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948088407] [2021-03-10 23:36:47,365 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 [2021-03-10 23:36:47,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:36:47,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:47,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:36:47,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:47,489 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 [2021-03-10 23:36:47,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:47,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:47,496 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 [2021-03-10 23:36:47,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:47,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:47,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:47,502 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:11 [2021-03-10 23:36:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:47,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:47,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 23:36:47,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410685759] [2021-03-10 23:36:47,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:36:47,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:47,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:36:47,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:36:47,524 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) [2021-03-10 23:36:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:47,573 INFO L93 Difference]: Finished difference Result 461 states and 1361 transitions. [2021-03-10 23:36:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:36:47,574 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 [2021-03-10 23:36:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:47,576 INFO L225 Difference]: With dead ends: 461 [2021-03-10 23:36:47,576 INFO L226 Difference]: Without dead ends: 446 [2021-03-10 23:36:47,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:36:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-03-10 23:36:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 312. [2021-03-10 23:36:47,583 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) [2021-03-10 23:36:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 922 transitions. [2021-03-10 23:36:47,585 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 922 transitions. Word has length 22 [2021-03-10 23:36:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:47,586 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 922 transitions. [2021-03-10 23:36:47,586 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) [2021-03-10 23:36:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 922 transitions. [2021-03-10 23:36:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:36:47,587 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:47,588 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:47,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 23:36:47,803 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:47,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1440075702, now seen corresponding path program 4 times [2021-03-10 23:36:47,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:47,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269428048] [2021-03-10 23:36:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:47,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269428048] [2021-03-10 23:36:47,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376297507] [2021-03-10 23:36:47,879 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:47,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:36:47,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:47,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:36:47,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:47,939 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 [2021-03-10 23:36:47,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:47,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:47,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:47,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:21 [2021-03-10 23:36:47,954 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 [2021-03-10 23:36:47,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:47,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:47,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:47,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:11 [2021-03-10 23:36:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:47,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:47,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 23:36:47,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500643808] [2021-03-10 23:36:47,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:36:47,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:47,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:36:47,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:36:47,981 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) [2021-03-10 23:36:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:48,038 INFO L93 Difference]: Finished difference Result 435 states and 1285 transitions. [2021-03-10 23:36:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:36:48,038 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 [2021-03-10 23:36:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:48,040 INFO L225 Difference]: With dead ends: 435 [2021-03-10 23:36:48,040 INFO L226 Difference]: Without dead ends: 420 [2021-03-10 23:36:48,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:36:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-03-10 23:36:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 330. [2021-03-10 23:36:48,047 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) [2021-03-10 23:36:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 976 transitions. [2021-03-10 23:36:48,048 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 976 transitions. Word has length 22 [2021-03-10 23:36:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:48,048 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 976 transitions. [2021-03-10 23:36:48,048 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) [2021-03-10 23:36:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 976 transitions. [2021-03-10 23:36:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:36:48,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:48,049 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:48,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:48,256 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:48,256 INFO L82 PathProgramCache]: Analyzing trace with hash 906040790, now seen corresponding path program 5 times [2021-03-10 23:36:48,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:48,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286376042] [2021-03-10 23:36:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:48,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286376042] [2021-03-10 23:36:48,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487649638] [2021-03-10 23:36:48,301 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) [2021-03-10 23:36:48,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:36:48,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:48,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:36:48,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:48,374 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 [2021-03-10 23:36:48,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:48,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:48,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:48,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2021-03-10 23:36:48,402 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 [2021-03-10 23:36:48,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:48,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:48,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:48,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:7 [2021-03-10 23:36:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:48,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:48,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 23:36:48,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280692342] [2021-03-10 23:36:48,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:36:48,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:48,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:36:48,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:36:48,427 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) [2021-03-10 23:36:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:48,490 INFO L93 Difference]: Finished difference Result 471 states and 1393 transitions. [2021-03-10 23:36:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:36:48,491 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 [2021-03-10 23:36:48,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:48,492 INFO L225 Difference]: With dead ends: 471 [2021-03-10 23:36:48,493 INFO L226 Difference]: Without dead ends: 456 [2021-03-10 23:36:48,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:36:48,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-10 23:36:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 342. [2021-03-10 23:36:48,502 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) [2021-03-10 23:36:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-03-10 23:36:48,503 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-03-10 23:36:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:48,503 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-03-10 23:36:48,503 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) [2021-03-10 23:36:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-03-10 23:36:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:36:48,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:48,504 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:48,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 23:36:48,721 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:48,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:48,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1893532402, now seen corresponding path program 6 times [2021-03-10 23:36:48,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:48,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85298767] [2021-03-10 23:36:48,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:48,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85298767] [2021-03-10 23:36:48,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166850513] [2021-03-10 23:36:48,778 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 [2021-03-10 23:36:48,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 23:36:48,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:48,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:36:48,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:48,841 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 [2021-03-10 23:36:48,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:48,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:48,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:48,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2021-03-10 23:36:48,864 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 [2021-03-10 23:36:48,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:48,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:48,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:48,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:11 [2021-03-10 23:36:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:48,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:48,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 23:36:48,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035264188] [2021-03-10 23:36:48,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:36:48,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:48,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:36:48,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:36:48,924 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) [2021-03-10 23:36:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:49,004 INFO L93 Difference]: Finished difference Result 463 states and 1369 transitions. [2021-03-10 23:36:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:36:49,005 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 [2021-03-10 23:36:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:49,006 INFO L225 Difference]: With dead ends: 463 [2021-03-10 23:36:49,006 INFO L226 Difference]: Without dead ends: 448 [2021-03-10 23:36:49,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:36:49,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-03-10 23:36:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 342. [2021-03-10 23:36:49,014 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) [2021-03-10 23:36:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-03-10 23:36:49,016 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-03-10 23:36:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:49,016 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-03-10 23:36:49,016 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) [2021-03-10 23:36:49,016 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-03-10 23:36:49,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:49,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:49,017 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:49,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 23:36:49,233 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:49,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:49,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1605954960, now seen corresponding path program 7 times [2021-03-10 23:36:49,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:49,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999013606] [2021-03-10 23:36:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:49,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999013606] [2021-03-10 23:36:49,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655760238] [2021-03-10 23:36:49,254 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 [2021-03-10 23:36:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:49,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:36:49,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:49,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:49,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 23:36:49,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537154633] [2021-03-10 23:36:49,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:36:49,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:49,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:36:49,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:36:49,337 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) [2021-03-10 23:36:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:49,410 INFO L93 Difference]: Finished difference Result 800 states and 2293 transitions. [2021-03-10 23:36:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:36:49,411 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 [2021-03-10 23:36:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:49,415 INFO L225 Difference]: With dead ends: 800 [2021-03-10 23:36:49,415 INFO L226 Difference]: Without dead ends: 800 [2021-03-10 23:36:49,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:36:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-03-10 23:36:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 428. [2021-03-10 23:36:49,426 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) [2021-03-10 23:36:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1322 transitions. [2021-03-10 23:36:49,428 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1322 transitions. Word has length 24 [2021-03-10 23:36:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:49,428 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 1322 transitions. [2021-03-10 23:36:49,428 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) [2021-03-10 23:36:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1322 transitions. [2021-03-10 23:36:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:49,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:49,429 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:49,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 23:36:49,635 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:49,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:49,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1027617620, now seen corresponding path program 8 times [2021-03-10 23:36:49,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:49,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529277151] [2021-03-10 23:36:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:49,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529277151] [2021-03-10 23:36:49,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373963617] [2021-03-10 23:36:49,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:49,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:36:49,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:49,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:36:49,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:49,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:49,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 23:36:49,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467554050] [2021-03-10 23:36:49,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:36:49,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:49,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:36:49,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:36:49,754 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) [2021-03-10 23:36:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:50,170 INFO L93 Difference]: Finished difference Result 1302 states and 3896 transitions. [2021-03-10 23:36:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:36:50,171 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 [2021-03-10 23:36:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:50,176 INFO L225 Difference]: With dead ends: 1302 [2021-03-10 23:36:50,176 INFO L226 Difference]: Without dead ends: 1252 [2021-03-10 23:36:50,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:36:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-03-10 23:36:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 716. [2021-03-10 23:36:50,192 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) [2021-03-10 23:36:50,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2314 transitions. [2021-03-10 23:36:50,194 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2314 transitions. Word has length 24 [2021-03-10 23:36:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:50,195 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 2314 transitions. [2021-03-10 23:36:50,195 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) [2021-03-10 23:36:50,195 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2314 transitions. [2021-03-10 23:36:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:50,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:50,197 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:50,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 23:36:50,411 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:50,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:50,412 INFO L82 PathProgramCache]: Analyzing trace with hash 590648912, now seen corresponding path program 9 times [2021-03-10 23:36:50,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:50,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353011273] [2021-03-10 23:36:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:50,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353011273] [2021-03-10 23:36:50,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895211836] [2021-03-10 23:36:50,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:50,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:36:50,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:50,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:36:50,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:50,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:50,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 23:36:50,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460082665] [2021-03-10 23:36:50,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:36:50,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:50,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:36:50,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:36:50,502 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) [2021-03-10 23:36:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:50,569 INFO L93 Difference]: Finished difference Result 1440 states and 4507 transitions. [2021-03-10 23:36:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:36:50,569 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 [2021-03-10 23:36:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:50,574 INFO L225 Difference]: With dead ends: 1440 [2021-03-10 23:36:50,574 INFO L226 Difference]: Without dead ends: 1297 [2021-03-10 23:36:50,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:36:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-03-10 23:36:50,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 986. [2021-03-10 23:36:50,613 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) [2021-03-10 23:36:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3247 transitions. [2021-03-10 23:36:50,615 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3247 transitions. Word has length 24 [2021-03-10 23:36:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:50,616 INFO L480 AbstractCegarLoop]: Abstraction has 986 states and 3247 transitions. [2021-03-10 23:36:50,616 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) [2021-03-10 23:36:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3247 transitions. [2021-03-10 23:36:50,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:50,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:50,620 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:50,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:50,831 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:50,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1807517862, now seen corresponding path program 10 times [2021-03-10 23:36:50,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:50,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868106227] [2021-03-10 23:36:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:50,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868106227] [2021-03-10 23:36:50,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331552013] [2021-03-10 23:36:50,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:50,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:36:50,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:50,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:36:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:50,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:50,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 23:36:50,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001144006] [2021-03-10 23:36:50,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:36:50,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:50,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:36:50,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:36:50,941 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) [2021-03-10 23:36:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:50,996 INFO L93 Difference]: Finished difference Result 1349 states and 4231 transitions. [2021-03-10 23:36:50,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:36:50,996 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 [2021-03-10 23:36:50,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:51,001 INFO L225 Difference]: With dead ends: 1349 [2021-03-10 23:36:51,001 INFO L226 Difference]: Without dead ends: 1343 [2021-03-10 23:36:51,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:36:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-03-10 23:36:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1016. [2021-03-10 23:36:51,028 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) [2021-03-10 23:36:51,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3317 transitions. [2021-03-10 23:36:51,031 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3317 transitions. Word has length 24 [2021-03-10 23:36:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:51,031 INFO L480 AbstractCegarLoop]: Abstraction has 1016 states and 3317 transitions. [2021-03-10 23:36:51,031 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) [2021-03-10 23:36:51,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3317 transitions. [2021-03-10 23:36:51,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:51,033 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:51,033 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:51,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:51,246 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:51,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:51,246 INFO L82 PathProgramCache]: Analyzing trace with hash -634548306, now seen corresponding path program 11 times [2021-03-10 23:36:51,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:51,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952516910] [2021-03-10 23:36:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:51,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952516910] [2021-03-10 23:36:51,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183672981] [2021-03-10 23:36:51,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:51,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:36:51,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:51,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:36:51,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:51,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:51,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:36:51,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730074284] [2021-03-10 23:36:51,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:36:51,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:51,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:36:51,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:36:51,356 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) [2021-03-10 23:36:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:51,445 INFO L93 Difference]: Finished difference Result 2033 states and 6560 transitions. [2021-03-10 23:36:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:36:51,445 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 [2021-03-10 23:36:51,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:51,453 INFO L225 Difference]: With dead ends: 2033 [2021-03-10 23:36:51,453 INFO L226 Difference]: Without dead ends: 2018 [2021-03-10 23:36:51,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:36:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-03-10 23:36:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1477. [2021-03-10 23:36:51,486 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) [2021-03-10 23:36:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 5066 transitions. [2021-03-10 23:36:51,490 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 5066 transitions. Word has length 24 [2021-03-10 23:36:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:51,490 INFO L480 AbstractCegarLoop]: Abstraction has 1477 states and 5066 transitions. [2021-03-10 23:36:51,490 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) [2021-03-10 23:36:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 5066 transitions. [2021-03-10 23:36:51,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:51,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:51,493 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:51,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 23:36:51,710 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:51,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:51,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1247760558, now seen corresponding path program 12 times [2021-03-10 23:36:51,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:51,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163804390] [2021-03-10 23:36:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:51,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163804390] [2021-03-10 23:36:51,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326750025] [2021-03-10 23:36:51,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:51,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:36:51,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:51,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:36:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:51,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:51,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 23:36:51,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025804534] [2021-03-10 23:36:51,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:36:51,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:51,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:36:51,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:36:51,801 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) [2021-03-10 23:36:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:51,860 INFO L93 Difference]: Finished difference Result 1938 states and 6279 transitions. [2021-03-10 23:36:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:36:51,861 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 [2021-03-10 23:36:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:51,868 INFO L225 Difference]: With dead ends: 1938 [2021-03-10 23:36:51,868 INFO L226 Difference]: Without dead ends: 1922 [2021-03-10 23:36:51,869 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:36:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-03-10 23:36:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1400. [2021-03-10 23:36:51,898 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) [2021-03-10 23:36:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4746 transitions. [2021-03-10 23:36:51,902 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4746 transitions. Word has length 24 [2021-03-10 23:36:51,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:51,903 INFO L480 AbstractCegarLoop]: Abstraction has 1400 states and 4746 transitions. [2021-03-10 23:36:51,903 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) [2021-03-10 23:36:51,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4746 transitions. [2021-03-10 23:36:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:51,906 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:51,906 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:52,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:52,122 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:52,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:52,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2047216916, now seen corresponding path program 13 times [2021-03-10 23:36:52,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:52,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496349047] [2021-03-10 23:36:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:52,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496349047] [2021-03-10 23:36:52,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822642216] [2021-03-10 23:36:52,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:52,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:36:52,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:52,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:52,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 23:36:52,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499005820] [2021-03-10 23:36:52,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:36:52,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:52,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:36:52,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:36:52,204 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) [2021-03-10 23:36:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:52,263 INFO L93 Difference]: Finished difference Result 2961 states and 9894 transitions. [2021-03-10 23:36:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:36:52,264 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 [2021-03-10 23:36:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:52,275 INFO L225 Difference]: With dead ends: 2961 [2021-03-10 23:36:52,275 INFO L226 Difference]: Without dead ends: 2952 [2021-03-10 23:36:52,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:36:52,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2021-03-10 23:36:52,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2033. [2021-03-10 23:36:52,336 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) [2021-03-10 23:36:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7182 transitions. [2021-03-10 23:36:52,341 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7182 transitions. Word has length 24 [2021-03-10 23:36:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:52,341 INFO L480 AbstractCegarLoop]: Abstraction has 2033 states and 7182 transitions. [2021-03-10 23:36:52,341 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) [2021-03-10 23:36:52,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7182 transitions. [2021-03-10 23:36:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:52,345 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:52,345 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:52,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 23:36:52,546 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:52,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:52,547 INFO L82 PathProgramCache]: Analyzing trace with hash -657880004, now seen corresponding path program 14 times [2021-03-10 23:36:52,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:52,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107412925] [2021-03-10 23:36:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:52,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107412925] [2021-03-10 23:36:52,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880390460] [2021-03-10 23:36:52,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:52,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:36:52,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:52,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:36:52,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:52,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:52,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 23:36:52,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239340674] [2021-03-10 23:36:52,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:36:52,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:52,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:36:52,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:36:52,642 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) [2021-03-10 23:36:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:52,704 INFO L93 Difference]: Finished difference Result 3041 states and 10107 transitions. [2021-03-10 23:36:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:36:52,705 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 [2021-03-10 23:36:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:52,725 INFO L225 Difference]: With dead ends: 3041 [2021-03-10 23:36:52,725 INFO L226 Difference]: Without dead ends: 3041 [2021-03-10 23:36:52,725 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:36:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-03-10 23:36:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2012. [2021-03-10 23:36:52,768 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) [2021-03-10 23:36:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 7093 transitions. [2021-03-10 23:36:52,773 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 7093 transitions. Word has length 24 [2021-03-10 23:36:52,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:52,773 INFO L480 AbstractCegarLoop]: Abstraction has 2012 states and 7093 transitions. [2021-03-10 23:36:52,774 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) [2021-03-10 23:36:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 7093 transitions. [2021-03-10 23:36:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:52,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:52,778 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:52,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:52,991 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:52,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1385038064, now seen corresponding path program 15 times [2021-03-10 23:36:52,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:52,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523951967] [2021-03-10 23:36:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:53,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523951967] [2021-03-10 23:36:53,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742740710] [2021-03-10 23:36:53,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:53,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:36:53,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:53,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:36:53,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:53,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:53,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 23:36:53,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361387738] [2021-03-10 23:36:53,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:36:53,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:53,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:36:53,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:36:53,103 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) [2021-03-10 23:36:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:53,626 INFO L93 Difference]: Finished difference Result 9230 states and 29756 transitions. [2021-03-10 23:36:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:36:53,627 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 [2021-03-10 23:36:53,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:53,681 INFO L225 Difference]: With dead ends: 9230 [2021-03-10 23:36:53,681 INFO L226 Difference]: Without dead ends: 8962 [2021-03-10 23:36:53,682 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:36:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-03-10 23:36:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 4517. [2021-03-10 23:36:53,823 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) [2021-03-10 23:36:53,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 16481 transitions. [2021-03-10 23:36:53,838 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 16481 transitions. Word has length 24 [2021-03-10 23:36:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:53,838 INFO L480 AbstractCegarLoop]: Abstraction has 4517 states and 16481 transitions. [2021-03-10 23:36:53,838 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) [2021-03-10 23:36:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 16481 transitions. [2021-03-10 23:36:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:53,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:53,848 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:54,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 23:36:54,065 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:54,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1687186486, now seen corresponding path program 16 times [2021-03-10 23:36:54,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:54,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618284981] [2021-03-10 23:36:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:54,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618284981] [2021-03-10 23:36:54,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756306996] [2021-03-10 23:36:54,088 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) [2021-03-10 23:36:54,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:36:54,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:54,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:36:54,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:36:54,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:54,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 23:36:54,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397396999] [2021-03-10 23:36:54,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:36:54,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:54,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:36:54,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:36:54,151 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) [2021-03-10 23:36:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:54,223 INFO L93 Difference]: Finished difference Result 5640 states and 19744 transitions. [2021-03-10 23:36:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:36:54,223 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 [2021-03-10 23:36:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:54,234 INFO L225 Difference]: With dead ends: 5640 [2021-03-10 23:36:54,234 INFO L226 Difference]: Without dead ends: 5614 [2021-03-10 23:36:54,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:36:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2021-03-10 23:36:54,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 4545. [2021-03-10 23:36:54,305 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) [2021-03-10 23:36:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 16553 transitions. [2021-03-10 23:36:54,317 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 16553 transitions. Word has length 24 [2021-03-10 23:36:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:54,317 INFO L480 AbstractCegarLoop]: Abstraction has 4545 states and 16553 transitions. [2021-03-10 23:36:54,317 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) [2021-03-10 23:36:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 16553 transitions. [2021-03-10 23:36:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:54,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:54,325 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:54,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 23:36:54,539 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash -72104176, now seen corresponding path program 17 times [2021-03-10 23:36:54,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:54,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99182487] [2021-03-10 23:36:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:54,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99182487] [2021-03-10 23:36:54,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527308415] [2021-03-10 23:36:54,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:54,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:36:54,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:54,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:36:54,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:54,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:54,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-03-10 23:36:54,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527256264] [2021-03-10 23:36:54,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:36:54,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:54,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:36:54,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:36:54,644 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) [2021-03-10 23:36:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:54,836 INFO L93 Difference]: Finished difference Result 6419 states and 21871 transitions. [2021-03-10 23:36:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:36:54,836 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 [2021-03-10 23:36:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:54,851 INFO L225 Difference]: With dead ends: 6419 [2021-03-10 23:36:54,851 INFO L226 Difference]: Without dead ends: 6345 [2021-03-10 23:36:54,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:36:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6345 states. [2021-03-10 23:36:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6345 to 4523. [2021-03-10 23:36:54,950 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) [2021-03-10 23:36:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 16486 transitions. [2021-03-10 23:36:54,961 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 16486 transitions. Word has length 24 [2021-03-10 23:36:54,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:54,961 INFO L480 AbstractCegarLoop]: Abstraction has 4523 states and 16486 transitions. [2021-03-10 23:36:54,961 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) [2021-03-10 23:36:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 16486 transitions. [2021-03-10 23:36:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:54,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:54,970 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:55,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 23:36:55,183 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:55,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:55,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1793507450, now seen corresponding path program 18 times [2021-03-10 23:36:55,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:55,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754345204] [2021-03-10 23:36:55,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:55,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754345204] [2021-03-10 23:36:55,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970371533] [2021-03-10 23:36:55,207 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) [2021-03-10 23:36:55,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 23:36:55,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:55,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:36:55,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:55,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:55,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 23:36:55,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357945591] [2021-03-10 23:36:55,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:36:55,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:55,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:36:55,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:36:55,262 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) [2021-03-10 23:36:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:55,340 INFO L93 Difference]: Finished difference Result 5931 states and 21351 transitions. [2021-03-10 23:36:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:36:55,340 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 [2021-03-10 23:36:55,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:55,353 INFO L225 Difference]: With dead ends: 5931 [2021-03-10 23:36:55,354 INFO L226 Difference]: Without dead ends: 5906 [2021-03-10 23:36:55,354 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:36:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5906 states. [2021-03-10 23:36:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5906 to 5352. [2021-03-10 23:36:55,432 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) [2021-03-10 23:36:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 19749 transitions. [2021-03-10 23:36:55,447 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 19749 transitions. Word has length 24 [2021-03-10 23:36:55,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:55,448 INFO L480 AbstractCegarLoop]: Abstraction has 5352 states and 19749 transitions. [2021-03-10 23:36:55,448 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) [2021-03-10 23:36:55,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 19749 transitions. [2021-03-10 23:36:55,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:55,457 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:55,457 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:55,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 23:36:55,671 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:55,672 INFO L82 PathProgramCache]: Analyzing trace with hash -591195082, now seen corresponding path program 19 times [2021-03-10 23:36:55,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:55,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088544948] [2021-03-10 23:36:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:55,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088544948] [2021-03-10 23:36:55,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320594693] [2021-03-10 23:36:55,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:55,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:36:55,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:36:55,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:55,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 23:36:55,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730192646] [2021-03-10 23:36:55,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:36:55,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:55,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:36:55,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:36:55,749 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) [2021-03-10 23:36:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:55,830 INFO L93 Difference]: Finished difference Result 6187 states and 22242 transitions. [2021-03-10 23:36:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:36:55,831 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 [2021-03-10 23:36:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:55,845 INFO L225 Difference]: With dead ends: 6187 [2021-03-10 23:36:55,845 INFO L226 Difference]: Without dead ends: 6177 [2021-03-10 23:36:55,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:36:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6177 states. [2021-03-10 23:36:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6177 to 5419. [2021-03-10 23:36:55,929 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) [2021-03-10 23:36:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 19973 transitions. [2021-03-10 23:36:56,010 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 19973 transitions. Word has length 24 [2021-03-10 23:36:56,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:56,010 INFO L480 AbstractCegarLoop]: Abstraction has 5419 states and 19973 transitions. [2021-03-10 23:36:56,010 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) [2021-03-10 23:36:56,010 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 19973 transitions. [2021-03-10 23:36:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:56,022 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:56,022 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:56,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 23:36:56,235 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:56,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1864128790, now seen corresponding path program 20 times [2021-03-10 23:36:56,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:56,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927924831] [2021-03-10 23:36:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:56,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927924831] [2021-03-10 23:36:56,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460543230] [2021-03-10 23:36:56,265 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 [2021-03-10 23:36:56,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:36:56,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:56,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:36:56,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:56,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:56,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 23:36:56,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759549081] [2021-03-10 23:36:56,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:36:56,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:56,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:36:56,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:36:56,338 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) [2021-03-10 23:36:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:56,717 INFO L93 Difference]: Finished difference Result 7179 states and 25144 transitions. [2021-03-10 23:36:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:36:56,718 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 [2021-03-10 23:36:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:56,731 INFO L225 Difference]: With dead ends: 7179 [2021-03-10 23:36:56,731 INFO L226 Difference]: Without dead ends: 7111 [2021-03-10 23:36:56,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:36:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2021-03-10 23:36:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 5518. [2021-03-10 23:36:56,815 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) [2021-03-10 23:36:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5518 states to 5518 states and 20247 transitions. [2021-03-10 23:36:56,830 INFO L78 Accepts]: Start accepts. Automaton has 5518 states and 20247 transitions. Word has length 24 [2021-03-10 23:36:56,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:56,830 INFO L480 AbstractCegarLoop]: Abstraction has 5518 states and 20247 transitions. [2021-03-10 23:36:56,830 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) [2021-03-10 23:36:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5518 states and 20247 transitions. [2021-03-10 23:36:56,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:56,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:56,839 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:57,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:57,055 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:57,055 INFO L82 PathProgramCache]: Analyzing trace with hash 437269908, now seen corresponding path program 21 times [2021-03-10 23:36:57,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:57,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766910452] [2021-03-10 23:36:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:57,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766910452] [2021-03-10 23:36:57,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181724031] [2021-03-10 23:36:57,077 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 [2021-03-10 23:36:57,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:36:57,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:57,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:36:57,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:36:57,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:57,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 23:36:57,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741104275] [2021-03-10 23:36:57,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:36:57,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:57,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:36:57,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:36:57,143 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) [2021-03-10 23:36:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:57,572 INFO L93 Difference]: Finished difference Result 11751 states and 40710 transitions. [2021-03-10 23:36:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:36:57,572 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 [2021-03-10 23:36:57,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:57,599 INFO L225 Difference]: With dead ends: 11751 [2021-03-10 23:36:57,599 INFO L226 Difference]: Without dead ends: 11587 [2021-03-10 23:36:57,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:36:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11587 states. [2021-03-10 23:36:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11587 to 8418. [2021-03-10 23:36:57,763 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) [2021-03-10 23:36:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31398 transitions. [2021-03-10 23:36:57,788 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31398 transitions. Word has length 24 [2021-03-10 23:36:57,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:57,788 INFO L480 AbstractCegarLoop]: Abstraction has 8418 states and 31398 transitions. [2021-03-10 23:36:57,788 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) [2021-03-10 23:36:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31398 transitions. [2021-03-10 23:36:57,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:36:57,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:57,805 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:58,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 23:36:58,021 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1422809918, now seen corresponding path program 22 times [2021-03-10 23:36:58,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:58,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135988035] [2021-03-10 23:36:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:58,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135988035] [2021-03-10 23:36:58,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960445385] [2021-03-10 23:36:58,045 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 [2021-03-10 23:36:58,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:36:58,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:58,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:36:58,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:58,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:58,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 23:36:58,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540298301] [2021-03-10 23:36:58,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:36:58,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:58,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:36:58,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:36:58,109 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) [2021-03-10 23:36:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:58,329 INFO L93 Difference]: Finished difference Result 9470 states and 34319 transitions. [2021-03-10 23:36:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:36:58,330 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 [2021-03-10 23:36:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:58,359 INFO L225 Difference]: With dead ends: 9470 [2021-03-10 23:36:58,359 INFO L226 Difference]: Without dead ends: 9392 [2021-03-10 23:36:58,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:36:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9392 states. [2021-03-10 23:36:58,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9392 to 8499. [2021-03-10 23:36:58,528 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) [2021-03-10 23:36:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8499 states to 8499 states and 31640 transitions. [2021-03-10 23:36:58,556 INFO L78 Accepts]: Start accepts. Automaton has 8499 states and 31640 transitions. Word has length 24 [2021-03-10 23:36:58,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:58,556 INFO L480 AbstractCegarLoop]: Abstraction has 8499 states and 31640 transitions. [2021-03-10 23:36:58,556 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) [2021-03-10 23:36:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 8499 states and 31640 transitions. [2021-03-10 23:36:58,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:36:58,575 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:58,575 INFO L519 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] [2021-03-10 23:36:58,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:58,790 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:58,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:58,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1052800080, now seen corresponding path program 23 times [2021-03-10 23:36:58,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:58,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589284729] [2021-03-10 23:36:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:59,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589284729] [2021-03-10 23:36:59,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420901334] [2021-03-10 23:36:59,056 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 [2021-03-10 23:36:59,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:36:59,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:59,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:36:59,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:59,283 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 [2021-03-10 23:36:59,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:59,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:59,307 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. [2021-03-10 23:36:59,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:67 [2021-03-10 23:36:59,370 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_19], 2=[A]} [2021-03-10 23:36:59,373 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 [2021-03-10 23:36:59,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:59,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:59,381 INFO L518 ElimStorePlain]: Eliminatee v_C_19 vanished before elimination [2021-03-10 23:36:59,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:59,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:36:59,386 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 [2021-03-10 23:36:59,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:59,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:59,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:59,394 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:36:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:59,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:59,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:36:59,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659218064] [2021-03-10 23:36:59,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:36:59,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:59,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:36:59,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:36:59,414 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) [2021-03-10 23:37:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:00,066 INFO L93 Difference]: Finished difference Result 11583 states and 42036 transitions. [2021-03-10 23:37:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:37:00,067 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 [2021-03-10 23:37:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:00,098 INFO L225 Difference]: With dead ends: 11583 [2021-03-10 23:37:00,098 INFO L226 Difference]: Without dead ends: 11568 [2021-03-10 23:37:00,099 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 493.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:37:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11568 states. [2021-03-10 23:37:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11568 to 8601. [2021-03-10 23:37:00,263 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) [2021-03-10 23:37:00,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8601 states to 8601 states and 31965 transitions. [2021-03-10 23:37:00,292 INFO L78 Accepts]: Start accepts. Automaton has 8601 states and 31965 transitions. Word has length 28 [2021-03-10 23:37:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:00,293 INFO L480 AbstractCegarLoop]: Abstraction has 8601 states and 31965 transitions. [2021-03-10 23:37:00,293 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) [2021-03-10 23:37:00,293 INFO L276 IsEmpty]: Start isEmpty. Operand 8601 states and 31965 transitions. [2021-03-10 23:37:00,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:00,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:00,312 INFO L519 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] [2021-03-10 23:37:00,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 23:37:00,527 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:00,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1677459088, now seen corresponding path program 24 times [2021-03-10 23:37:00,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:00,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997539684] [2021-03-10 23:37:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:00,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997539684] [2021-03-10 23:37:00,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353116861] [2021-03-10 23:37:00,740 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 [2021-03-10 23:37:00,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:37:00,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:00,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:00,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:00,901 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 [2021-03-10 23:37:00,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:00,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:00,916 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. [2021-03-10 23:37:00,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-03-10 23:37:01,031 INFO L446 ElimStorePlain]: Different costs {0=[v_C_21, B], 2=[A]} [2021-03-10 23:37:01,034 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 [2021-03-10 23:37:01,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:01,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:01,046 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 [2021-03-10 23:37:01,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:01,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:01,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:01,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:01,057 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 [2021-03-10 23:37:01,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:01,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:01,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:01,064 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:37:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:01,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:01,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:01,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918563467] [2021-03-10 23:37:01,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:01,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:01,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:01,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:01,082 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) [2021-03-10 23:37:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:01,626 INFO L93 Difference]: Finished difference Result 11653 states and 42250 transitions. [2021-03-10 23:37:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:37:01,626 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 [2021-03-10 23:37:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:01,655 INFO L225 Difference]: With dead ends: 11653 [2021-03-10 23:37:01,655 INFO L226 Difference]: Without dead ends: 11611 [2021-03-10 23:37:01,656 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 409.9ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:37:01,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11611 states. [2021-03-10 23:37:01,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11611 to 8620. [2021-03-10 23:37:01,797 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) [2021-03-10 23:37:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8620 states to 8620 states and 32029 transitions. [2021-03-10 23:37:01,826 INFO L78 Accepts]: Start accepts. Automaton has 8620 states and 32029 transitions. Word has length 28 [2021-03-10 23:37:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:01,827 INFO L480 AbstractCegarLoop]: Abstraction has 8620 states and 32029 transitions. [2021-03-10 23:37:01,827 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) [2021-03-10 23:37:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 8620 states and 32029 transitions. [2021-03-10 23:37:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:01,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:01,842 INFO L519 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] [2021-03-10 23:37:02,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 23:37:02,043 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash -350938928, now seen corresponding path program 25 times [2021-03-10 23:37:02,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:02,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104154948] [2021-03-10 23:37:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:02,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104154948] [2021-03-10 23:37:02,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839695069] [2021-03-10 23:37:02,261 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 [2021-03-10 23:37:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:02,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:02,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:02,394 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 [2021-03-10 23:37:02,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:02,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:02,409 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. [2021-03-10 23:37:02,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-03-10 23:37:02,456 INFO L446 ElimStorePlain]: Different costs {0=[v_C_23], 3=[A]} [2021-03-10 23:37:02,458 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 [2021-03-10 23:37:02,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:02,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:02,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:02,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:02,473 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 [2021-03-10 23:37:02,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:02,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:02,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:02,483 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:35 [2021-03-10 23:37:02,503 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 [2021-03-10 23:37:02,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:02,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:02,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:02,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:37:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:02,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:02,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:02,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673494130] [2021-03-10 23:37:02,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:02,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:02,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:02,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:02,528 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) [2021-03-10 23:37:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:03,126 INFO L93 Difference]: Finished difference Result 11729 states and 42507 transitions. [2021-03-10 23:37:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:37:03,127 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 [2021-03-10 23:37:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:03,156 INFO L225 Difference]: With dead ends: 11729 [2021-03-10 23:37:03,156 INFO L226 Difference]: Without dead ends: 11714 [2021-03-10 23:37:03,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:37:03,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11714 states. [2021-03-10 23:37:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11714 to 8638. [2021-03-10 23:37:03,295 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) [2021-03-10 23:37:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8638 states to 8638 states and 32104 transitions. [2021-03-10 23:37:03,320 INFO L78 Accepts]: Start accepts. Automaton has 8638 states and 32104 transitions. Word has length 28 [2021-03-10 23:37:03,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:03,320 INFO L480 AbstractCegarLoop]: Abstraction has 8638 states and 32104 transitions. [2021-03-10 23:37:03,320 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) [2021-03-10 23:37:03,321 INFO L276 IsEmpty]: Start isEmpty. Operand 8638 states and 32104 transitions. [2021-03-10 23:37:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:03,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:03,336 INFO L519 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] [2021-03-10 23:37:03,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 23:37:03,537 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:03,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1471520656, now seen corresponding path program 26 times [2021-03-10 23:37:03,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:03,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130644640] [2021-03-10 23:37:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:03,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130644640] [2021-03-10 23:37:03,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127723178] [2021-03-10 23:37:03,730 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 [2021-03-10 23:37:03,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:37:03,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:03,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:03,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:03,838 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 [2021-03-10 23:37:03,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:03,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:03,853 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. [2021-03-10 23:37:03,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:52 [2021-03-10 23:37:03,989 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_25], 2=[A]} [2021-03-10 23:37:03,992 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 33 treesize of output 25 [2021-03-10 23:37:03,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:04,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:04,000 INFO L518 ElimStorePlain]: Eliminatee v_C_25 vanished before elimination [2021-03-10 23:37:04,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:04,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:04,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:37:04,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:04,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:04,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:04,009 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:37:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:04,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:04,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:04,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443001883] [2021-03-10 23:37:04,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:04,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:04,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:04,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:04,027 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) [2021-03-10 23:37:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:04,681 INFO L93 Difference]: Finished difference Result 11712 states and 42480 transitions. [2021-03-10 23:37:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:37:04,681 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 [2021-03-10 23:37:04,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:04,712 INFO L225 Difference]: With dead ends: 11712 [2021-03-10 23:37:04,713 INFO L226 Difference]: Without dead ends: 11697 [2021-03-10 23:37:04,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 443.1ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:37:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11697 states. [2021-03-10 23:37:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11697 to 8684. [2021-03-10 23:37:04,879 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) [2021-03-10 23:37:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8684 states to 8684 states and 32261 transitions. [2021-03-10 23:37:04,907 INFO L78 Accepts]: Start accepts. Automaton has 8684 states and 32261 transitions. Word has length 28 [2021-03-10 23:37:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:04,907 INFO L480 AbstractCegarLoop]: Abstraction has 8684 states and 32261 transitions. [2021-03-10 23:37:04,907 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) [2021-03-10 23:37:04,907 INFO L276 IsEmpty]: Start isEmpty. Operand 8684 states and 32261 transitions. [2021-03-10 23:37:04,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:04,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:04,923 INFO L519 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] [2021-03-10 23:37:05,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 23:37:05,124 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:05,124 INFO L82 PathProgramCache]: Analyzing trace with hash -556877360, now seen corresponding path program 27 times [2021-03-10 23:37:05,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:05,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366629916] [2021-03-10 23:37:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:05,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366629916] [2021-03-10 23:37:05,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925819262] [2021-03-10 23:37:05,321 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 [2021-03-10 23:37:05,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:37:05,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:05,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:05,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:05,424 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 [2021-03-10 23:37:05,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:05,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:05,439 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. [2021-03-10 23:37:05,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:64 [2021-03-10 23:37:05,522 INFO L446 ElimStorePlain]: Different costs {0=[v_C_27], 3=[A]} [2021-03-10 23:37:05,524 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 [2021-03-10 23:37:05,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:05,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:05,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:05,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:05,539 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 [2021-03-10 23:37:05,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:05,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:05,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:05,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:35 [2021-03-10 23:37:05,571 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 [2021-03-10 23:37:05,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:05,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:05,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:05,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:37:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:05,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:05,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:05,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997719709] [2021-03-10 23:37:05,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:05,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:05,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:05,594 INFO L87 Difference]: Start difference. First operand 8684 states and 32261 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) [2021-03-10 23:37:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:06,095 INFO L93 Difference]: Finished difference Result 11804 states and 42775 transitions. [2021-03-10 23:37:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:37:06,095 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 [2021-03-10 23:37:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:06,123 INFO L225 Difference]: With dead ends: 11804 [2021-03-10 23:37:06,123 INFO L226 Difference]: Without dead ends: 11765 [2021-03-10 23:37:06,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 394.8ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:37:06,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11765 states. [2021-03-10 23:37:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11765 to 8687. [2021-03-10 23:37:06,302 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) [2021-03-10 23:37:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 32277 transitions. [2021-03-10 23:37:06,327 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 32277 transitions. Word has length 28 [2021-03-10 23:37:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:06,327 INFO L480 AbstractCegarLoop]: Abstraction has 8687 states and 32277 transitions. [2021-03-10 23:37:06,327 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) [2021-03-10 23:37:06,328 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 32277 transitions. [2021-03-10 23:37:06,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:06,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:06,343 INFO L519 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] [2021-03-10 23:37:06,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 23:37:06,543 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:06,544 INFO L82 PathProgramCache]: Analyzing trace with hash 108829392, now seen corresponding path program 28 times [2021-03-10 23:37:06,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:06,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709729552] [2021-03-10 23:37:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:06,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709729552] [2021-03-10 23:37:06,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095233016] [2021-03-10 23:37:06,731 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 [2021-03-10 23:37:06,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:37:06,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:06,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:06,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:06,831 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 [2021-03-10 23:37:06,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:06,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:06,845 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. [2021-03-10 23:37:06,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:64 [2021-03-10 23:37:06,884 INFO L446 ElimStorePlain]: Different costs {0=[v_C_29], 3=[A]} [2021-03-10 23:37:06,887 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 [2021-03-10 23:37:06,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:06,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:06,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:06,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:06,903 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 [2021-03-10 23:37:06,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:06,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:06,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:06,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-03-10 23:37:06,959 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 [2021-03-10 23:37:06,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:06,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:06,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:06,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:37:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:06,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:06,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:06,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197666739] [2021-03-10 23:37:06,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:06,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:06,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:06,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:06,987 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) [2021-03-10 23:37:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:07,478 INFO L93 Difference]: Finished difference Result 11740 states and 42594 transitions. [2021-03-10 23:37:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:37:07,479 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 [2021-03-10 23:37:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:07,507 INFO L225 Difference]: With dead ends: 11740 [2021-03-10 23:37:07,507 INFO L226 Difference]: Without dead ends: 11725 [2021-03-10 23:37:07,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:37:07,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11725 states. [2021-03-10 23:37:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11725 to 8719. [2021-03-10 23:37:07,650 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) [2021-03-10 23:37:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 32381 transitions. [2021-03-10 23:37:07,676 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 32381 transitions. Word has length 28 [2021-03-10 23:37:07,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:07,676 INFO L480 AbstractCegarLoop]: Abstraction has 8719 states and 32381 transitions. [2021-03-10 23:37:07,676 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) [2021-03-10 23:37:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 32381 transitions. [2021-03-10 23:37:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:07,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:07,692 INFO L519 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] [2021-03-10 23:37:07,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:07,903 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:07,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:07,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1194690256, now seen corresponding path program 29 times [2021-03-10 23:37:07,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:07,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775559521] [2021-03-10 23:37:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:08,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775559521] [2021-03-10 23:37:08,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239295982] [2021-03-10 23:37:08,191 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 [2021-03-10 23:37:08,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:37:08,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:08,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:08,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:08,347 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 [2021-03-10 23:37:08,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:08,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:08,360 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. [2021-03-10 23:37:08,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-03-10 23:37:08,402 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_31], 2=[A]} [2021-03-10 23:37:08,405 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 [2021-03-10 23:37:08,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:08,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:08,414 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 [2021-03-10 23:37:08,415 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:37:08,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:08,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:08,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:08,427 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 [2021-03-10 23:37:08,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:08,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:08,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:08,433 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:37:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:08,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:08,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:08,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280508762] [2021-03-10 23:37:08,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:08,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:08,448 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) [2021-03-10 23:37:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:09,135 INFO L93 Difference]: Finished difference Result 11783 states and 42686 transitions. [2021-03-10 23:37:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:37:09,136 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 [2021-03-10 23:37:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:09,169 INFO L225 Difference]: With dead ends: 11783 [2021-03-10 23:37:09,169 INFO L226 Difference]: Without dead ends: 11758 [2021-03-10 23:37:09,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 607.3ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:37:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11758 states. [2021-03-10 23:37:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11758 to 8765. [2021-03-10 23:37:09,321 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) [2021-03-10 23:37:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 32524 transitions. [2021-03-10 23:37:09,346 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 32524 transitions. Word has length 28 [2021-03-10 23:37:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:09,346 INFO L480 AbstractCegarLoop]: Abstraction has 8765 states and 32524 transitions. [2021-03-10 23:37:09,346 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) [2021-03-10 23:37:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 32524 transitions. [2021-03-10 23:37:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:09,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:09,364 INFO L519 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] [2021-03-10 23:37:09,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 23:37:09,580 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:09,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:09,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1819349264, now seen corresponding path program 30 times [2021-03-10 23:37:09,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:09,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606679435] [2021-03-10 23:37:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:09,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606679435] [2021-03-10 23:37:09,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001185245] [2021-03-10 23:37:09,779 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 [2021-03-10 23:37:09,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:37:09,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:09,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:09,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:09,899 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 [2021-03-10 23:37:09,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:09,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:09,919 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. [2021-03-10 23:37:09,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-03-10 23:37:10,086 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_33], 2=[A]} [2021-03-10 23:37:10,089 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 [2021-03-10 23:37:10,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:10,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:10,099 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 [2021-03-10 23:37:10,101 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:37:10,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:10,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:10,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:10,111 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 [2021-03-10 23:37:10,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:10,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:10,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:10,119 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:37:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:10,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:10,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:10,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25512530] [2021-03-10 23:37:10,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:10,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:10,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:10,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:10,134 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) [2021-03-10 23:37:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:10,666 INFO L93 Difference]: Finished difference Result 11773 states and 42654 transitions. [2021-03-10 23:37:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:37:10,666 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 [2021-03-10 23:37:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:10,693 INFO L225 Difference]: With dead ends: 11773 [2021-03-10 23:37:10,694 INFO L226 Difference]: Without dead ends: 11710 [2021-03-10 23:37:10,694 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 525.7ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:37:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11710 states. [2021-03-10 23:37:10,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11710 to 8784. [2021-03-10 23:37:10,822 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) [2021-03-10 23:37:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 32581 transitions. [2021-03-10 23:37:10,851 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 32581 transitions. Word has length 28 [2021-03-10 23:37:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:10,851 INFO L480 AbstractCegarLoop]: Abstraction has 8784 states and 32581 transitions. [2021-03-10 23:37:10,851 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) [2021-03-10 23:37:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 32581 transitions. [2021-03-10 23:37:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:10,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:10,869 INFO L519 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] [2021-03-10 23:37:11,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 23:37:11,070 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:11,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:11,071 INFO L82 PathProgramCache]: Analyzing trace with hash -209048752, now seen corresponding path program 31 times [2021-03-10 23:37:11,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:11,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047507282] [2021-03-10 23:37:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:11,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047507282] [2021-03-10 23:37:11,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172353855] [2021-03-10 23:37:11,271 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 [2021-03-10 23:37:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:11,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:11,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:11,385 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 [2021-03-10 23:37:11,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:11,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:11,400 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. [2021-03-10 23:37:11,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-03-10 23:37:11,437 INFO L446 ElimStorePlain]: Different costs {0=[v_C_35], 3=[A]} [2021-03-10 23:37:11,440 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 [2021-03-10 23:37:11,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:11,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:11,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:11,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:11,455 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 [2021-03-10 23:37:11,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:11,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:11,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:11,465 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:35 [2021-03-10 23:37:11,484 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 [2021-03-10 23:37:11,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:11,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:11,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:11,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:37:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:11,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:11,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:11,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031775751] [2021-03-10 23:37:11,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:11,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:11,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:11,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:11,507 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) [2021-03-10 23:37:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:12,302 INFO L93 Difference]: Finished difference Result 11864 states and 42950 transitions. [2021-03-10 23:37:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:37:12,303 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 [2021-03-10 23:37:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:12,331 INFO L225 Difference]: With dead ends: 11864 [2021-03-10 23:37:12,331 INFO L226 Difference]: Without dead ends: 11839 [2021-03-10 23:37:12,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 495.7ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:37:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11839 states. [2021-03-10 23:37:12,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11839 to 8763. [2021-03-10 23:37:12,500 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) [2021-03-10 23:37:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8763 states to 8763 states and 32537 transitions. [2021-03-10 23:37:12,529 INFO L78 Accepts]: Start accepts. Automaton has 8763 states and 32537 transitions. Word has length 28 [2021-03-10 23:37:12,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:12,529 INFO L480 AbstractCegarLoop]: Abstraction has 8763 states and 32537 transitions. [2021-03-10 23:37:12,529 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) [2021-03-10 23:37:12,529 INFO L276 IsEmpty]: Start isEmpty. Operand 8763 states and 32537 transitions. [2021-03-10 23:37:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:12,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:12,545 INFO L519 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] [2021-03-10 23:37:12,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:12,746 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:12,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:12,746 INFO L82 PathProgramCache]: Analyzing trace with hash -691193520, now seen corresponding path program 32 times [2021-03-10 23:37:12,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:12,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589901907] [2021-03-10 23:37:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:12,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589901907] [2021-03-10 23:37:12,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374771232] [2021-03-10 23:37:12,943 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 [2021-03-10 23:37:12,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:37:12,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:12,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:12,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:13,078 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 [2021-03-10 23:37:13,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:13,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:13,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:13,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-03-10 23:37:13,126 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 [2021-03-10 23:37:13,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:13,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:13,133 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 [2021-03-10 23:37:13,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:13,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:13,135 INFO L518 ElimStorePlain]: Eliminatee v_C_37 vanished before elimination [2021-03-10 23:37:13,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:13,136 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-03-10 23:37:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:13,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:13,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:37:13,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841458469] [2021-03-10 23:37:13,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:37:13,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:13,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:37:13,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:13,153 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) [2021-03-10 23:37:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:13,793 INFO L93 Difference]: Finished difference Result 9105 states and 33542 transitions. [2021-03-10 23:37:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:37:13,793 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 [2021-03-10 23:37:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:13,815 INFO L225 Difference]: With dead ends: 9105 [2021-03-10 23:37:13,816 INFO L226 Difference]: Without dead ends: 9090 [2021-03-10 23:37:13,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 543.7ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:37:13,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9090 states. [2021-03-10 23:37:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9090 to 8789. [2021-03-10 23:37:13,922 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) [2021-03-10 23:37:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8789 states to 8789 states and 32631 transitions. [2021-03-10 23:37:13,948 INFO L78 Accepts]: Start accepts. Automaton has 8789 states and 32631 transitions. Word has length 28 [2021-03-10 23:37:13,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:13,948 INFO L480 AbstractCegarLoop]: Abstraction has 8789 states and 32631 transitions. [2021-03-10 23:37:13,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 8789 states and 32631 transitions. [2021-03-10 23:37:13,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:13,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:13,963 INFO L519 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] [2021-03-10 23:37:14,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-03-10 23:37:14,164 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:14,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:14,164 INFO L82 PathProgramCache]: Analyzing trace with hash 611501012, now seen corresponding path program 33 times [2021-03-10 23:37:14,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:14,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009726095] [2021-03-10 23:37:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:14,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009726095] [2021-03-10 23:37:14,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149983965] [2021-03-10 23:37:14,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:14,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:37:14,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:14,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:37:14,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:14,487 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 [2021-03-10 23:37:14,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:14,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:14,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:14,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-03-10 23:37:14,609 INFO L446 ElimStorePlain]: Different costs {0=[v_C_39], 2=[A, B]} [2021-03-10 23:37:14,612 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 [2021-03-10 23:37:14,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:14,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:14,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:14,634 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 [2021-03-10 23:37:14,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:37:14,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:14,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:14,676 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 59 treesize of output 59 [2021-03-10 23:37:14,706 INFO L550 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:37:14,750 INFO L628 ElimStorePlain]: treesize reduction 63, result has 39.4 percent of original size [2021-03-10 23:37:14,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:14,846 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:82 [2021-03-10 23:37:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:14,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:14,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-10 23:37:14,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488490190] [2021-03-10 23:37:14,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:37:14,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:14,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:37:14,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:37:14,922 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) [2021-03-10 23:37:16,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:16,294 INFO L93 Difference]: Finished difference Result 11850 states and 42895 transitions. [2021-03-10 23:37:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:37:16,294 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 [2021-03-10 23:37:16,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:16,318 INFO L225 Difference]: With dead ends: 11850 [2021-03-10 23:37:16,318 INFO L226 Difference]: Without dead ends: 11767 [2021-03-10 23:37:16,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 943.6ms TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:37:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11767 states. [2021-03-10 23:37:16,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11767 to 8811. [2021-03-10 23:37:16,460 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) [2021-03-10 23:37:16,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 32705 transitions. [2021-03-10 23:37:16,485 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 32705 transitions. Word has length 28 [2021-03-10 23:37:16,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:16,485 INFO L480 AbstractCegarLoop]: Abstraction has 8811 states and 32705 transitions. [2021-03-10 23:37:16,485 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) [2021-03-10 23:37:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 32705 transitions. [2021-03-10 23:37:16,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:16,500 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:16,500 INFO L519 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] [2021-03-10 23:37:16,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:16,703 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:16,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:16,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1679375576, now seen corresponding path program 34 times [2021-03-10 23:37:16,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:16,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291078235] [2021-03-10 23:37:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:16,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291078235] [2021-03-10 23:37:16,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394786671] [2021-03-10 23:37:16,925 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 [2021-03-10 23:37:16,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:37:16,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:16,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:16,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:17,044 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 [2021-03-10 23:37:17,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:17,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:17,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:17,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-03-10 23:37:17,090 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 33 treesize of output 25 [2021-03-10 23:37:17,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:17,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:17,096 INFO L518 ElimStorePlain]: Eliminatee v_C_41 vanished before elimination [2021-03-10 23:37:17,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:17,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-03-10 23:37:17,120 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 [2021-03-10 23:37:17,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:17,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:17,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:17,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:37:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:17,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:17,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:37:17,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150363511] [2021-03-10 23:37:17,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:37:17,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:17,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:37:17,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:17,151 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) [2021-03-10 23:37:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:17,876 INFO L93 Difference]: Finished difference Result 11773 states and 42754 transitions. [2021-03-10 23:37:17,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:37:17,877 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 [2021-03-10 23:37:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:17,901 INFO L225 Difference]: With dead ends: 11773 [2021-03-10 23:37:17,901 INFO L226 Difference]: Without dead ends: 11758 [2021-03-10 23:37:17,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:37:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11758 states. [2021-03-10 23:37:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11758 to 8839. [2021-03-10 23:37:18,023 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) [2021-03-10 23:37:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8839 states to 8839 states and 32808 transitions. [2021-03-10 23:37:18,047 INFO L78 Accepts]: Start accepts. Automaton has 8839 states and 32808 transitions. Word has length 28 [2021-03-10 23:37:18,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:18,047 INFO L480 AbstractCegarLoop]: Abstraction has 8839 states and 32808 transitions. [2021-03-10 23:37:18,047 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) [2021-03-10 23:37:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 8839 states and 32808 transitions. [2021-03-10 23:37:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:18,061 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:18,061 INFO L519 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] [2021-03-10 23:37:18,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-03-10 23:37:18,262 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:18,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1494941196, now seen corresponding path program 35 times [2021-03-10 23:37:18,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:18,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284686996] [2021-03-10 23:37:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:18,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284686996] [2021-03-10 23:37:18,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918483491] [2021-03-10 23:37:18,482 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 [2021-03-10 23:37:18,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:37:18,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:18,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:18,559 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 [2021-03-10 23:37:18,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:18,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:18,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:18,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-03-10 23:37:18,708 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_43], 2=[A]} [2021-03-10 23:37:18,710 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 [2021-03-10 23:37:18,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:18,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:18,719 INFO L518 ElimStorePlain]: Eliminatee v_C_43 vanished before elimination [2021-03-10 23:37:18,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:18,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:18,721 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 [2021-03-10 23:37:18,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:18,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:18,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:18,728 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:37:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:18,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:18,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:18,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967460489] [2021-03-10 23:37:18,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:18,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:18,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:18,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:18,743 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) [2021-03-10 23:37:19,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:19,223 INFO L93 Difference]: Finished difference Result 11850 states and 42962 transitions. [2021-03-10 23:37:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:37:19,223 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 [2021-03-10 23:37:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:19,245 INFO L225 Difference]: With dead ends: 11850 [2021-03-10 23:37:19,245 INFO L226 Difference]: Without dead ends: 11787 [2021-03-10 23:37:19,246 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 424.5ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:37:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11787 states. [2021-03-10 23:37:19,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11787 to 8865. [2021-03-10 23:37:19,365 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) [2021-03-10 23:37:19,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8865 states to 8865 states and 32880 transitions. [2021-03-10 23:37:19,390 INFO L78 Accepts]: Start accepts. Automaton has 8865 states and 32880 transitions. Word has length 28 [2021-03-10 23:37:19,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:19,390 INFO L480 AbstractCegarLoop]: Abstraction has 8865 states and 32880 transitions. [2021-03-10 23:37:19,390 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) [2021-03-10 23:37:19,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8865 states and 32880 transitions. [2021-03-10 23:37:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:19,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:19,405 INFO L519 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] [2021-03-10 23:37:19,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 23:37:19,605 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:19,606 INFO L82 PathProgramCache]: Analyzing trace with hash 771628084, now seen corresponding path program 36 times [2021-03-10 23:37:19,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:19,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316927998] [2021-03-10 23:37:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:19,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316927998] [2021-03-10 23:37:19,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833799277] [2021-03-10 23:37:19,833 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) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:19,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:37:19,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:19,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:37:19,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:19,929 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 [2021-03-10 23:37:19,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:19,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:19,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:19,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:60 [2021-03-10 23:37:20,083 INFO L446 ElimStorePlain]: Different costs {0=[v_C_45], 3=[A]} [2021-03-10 23:37:20,086 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 [2021-03-10 23:37:20,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:20,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:20,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:20,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:20,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 47 [2021-03-10 23:37:20,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:20,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:20,164 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. [2021-03-10 23:37:20,164 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:88, output treesize:102 [2021-03-10 23:37:20,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 23:37:20,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:20,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:20,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:20,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-03-10 23:37:20,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:37:20,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:20,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:20,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-03-10 23:37:20,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:20,409 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-10 23:37:20,410 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 [2021-03-10 23:37:20,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:20,413 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 9 treesize of output 5 [2021-03-10 23:37:20,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:20,465 INFO L628 ElimStorePlain]: treesize reduction 13, result has 82.2 percent of original size [2021-03-10 23:37:20,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:37:20,467 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:212, output treesize:62 [2021-03-10 23:37:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:20,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:20,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 23:37:20,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638212837] [2021-03-10 23:37:20,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:37:20,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:20,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:37:20,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:37:20,534 INFO L87 Difference]: Start difference. First operand 8865 states and 32880 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:21,450 INFO L93 Difference]: Finished difference Result 12047 states and 43486 transitions. [2021-03-10 23:37:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:37:21,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:37:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:21,475 INFO L225 Difference]: With dead ends: 12047 [2021-03-10 23:37:21,476 INFO L226 Difference]: Without dead ends: 11986 [2021-03-10 23:37:21,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 795.4ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:37:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11986 states. [2021-03-10 23:37:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11986 to 8872. [2021-03-10 23:37:21,603 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) [2021-03-10 23:37:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8872 states to 8872 states and 32901 transitions. [2021-03-10 23:37:21,628 INFO L78 Accepts]: Start accepts. Automaton has 8872 states and 32901 transitions. Word has length 28 [2021-03-10 23:37:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:21,628 INFO L480 AbstractCegarLoop]: Abstraction has 8872 states and 32901 transitions. [2021-03-10 23:37:21,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 8872 states and 32901 transitions. [2021-03-10 23:37:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:21,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:21,643 INFO L519 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] [2021-03-10 23:37:21,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:21,843 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:21,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1703274480, now seen corresponding path program 37 times [2021-03-10 23:37:21,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:21,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44023117] [2021-03-10 23:37:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:22,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44023117] [2021-03-10 23:37:22,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342605649] [2021-03-10 23:37:22,059 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 [2021-03-10 23:37:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:22,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:22,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:22,161 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 [2021-03-10 23:37:22,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:22,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:22,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:22,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:37:22,258 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 [2021-03-10 23:37:22,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:22,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:22,263 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 [2021-03-10 23:37:22,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:22,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:22,265 INFO L518 ElimStorePlain]: Eliminatee v_C_47 vanished before elimination [2021-03-10 23:37:22,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:22,266 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-03-10 23:37:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:22,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:22,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:37:22,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340115779] [2021-03-10 23:37:22,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:37:22,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:22,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:37:22,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:22,281 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) [2021-03-10 23:37:22,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:22,991 INFO L93 Difference]: Finished difference Result 13042 states and 46993 transitions. [2021-03-10 23:37:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:37:22,991 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 [2021-03-10 23:37:22,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:23,024 INFO L225 Difference]: With dead ends: 13042 [2021-03-10 23:37:23,024 INFO L226 Difference]: Without dead ends: 12979 [2021-03-10 23:37:23,025 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 559.7ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:37:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12979 states. [2021-03-10 23:37:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12979 to 8887. [2021-03-10 23:37:23,248 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) [2021-03-10 23:37:23,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8887 states to 8887 states and 32942 transitions. [2021-03-10 23:37:23,276 INFO L78 Accepts]: Start accepts. Automaton has 8887 states and 32942 transitions. Word has length 28 [2021-03-10 23:37:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:23,277 INFO L480 AbstractCegarLoop]: Abstraction has 8887 states and 32942 transitions. [2021-03-10 23:37:23,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 8887 states and 32942 transitions. [2021-03-10 23:37:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:23,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:23,293 INFO L519 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] [2021-03-10 23:37:23,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 23:37:23,507 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:23,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1572310124, now seen corresponding path program 38 times [2021-03-10 23:37:23,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:23,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340397327] [2021-03-10 23:37:23,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:23,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340397327] [2021-03-10 23:37:23,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148620730] [2021-03-10 23:37:23,772 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 [2021-03-10 23:37:23,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:37:23,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:23,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:23,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:23,867 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 [2021-03-10 23:37:23,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:23,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:23,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:23,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:37:23,936 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 [2021-03-10 23:37:23,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:23,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:23,942 INFO L518 ElimStorePlain]: Eliminatee v_C_49 vanished before elimination [2021-03-10 23:37:23,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:23,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-03-10 23:37:23,978 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 [2021-03-10 23:37:23,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:23,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:23,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:23,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 23:37:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:24,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:24,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:37:24,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661080197] [2021-03-10 23:37:24,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:37:24,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:24,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:37:24,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:24,007 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) [2021-03-10 23:37:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:24,714 INFO L93 Difference]: Finished difference Result 11822 states and 42875 transitions. [2021-03-10 23:37:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:37:24,714 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 [2021-03-10 23:37:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:24,738 INFO L225 Difference]: With dead ends: 11822 [2021-03-10 23:37:24,738 INFO L226 Difference]: Without dead ends: 11794 [2021-03-10 23:37:24,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 547.2ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:37:24,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11794 states. [2021-03-10 23:37:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11794 to 8890. [2021-03-10 23:37:24,867 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) [2021-03-10 23:37:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8890 states to 8890 states and 32958 transitions. [2021-03-10 23:37:24,893 INFO L78 Accepts]: Start accepts. Automaton has 8890 states and 32958 transitions. Word has length 28 [2021-03-10 23:37:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:24,893 INFO L480 AbstractCegarLoop]: Abstraction has 8890 states and 32958 transitions. [2021-03-10 23:37:24,893 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) [2021-03-10 23:37:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 8890 states and 32958 transitions. [2021-03-10 23:37:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:24,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:24,909 INFO L519 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] [2021-03-10 23:37:25,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:25,109 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:25,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:25,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2106345036, now seen corresponding path program 39 times [2021-03-10 23:37:25,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:25,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873481767] [2021-03-10 23:37:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:25,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873481767] [2021-03-10 23:37:25,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598898083] [2021-03-10 23:37:25,323 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 [2021-03-10 23:37:25,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:37:25,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:25,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:25,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:25,412 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 [2021-03-10 23:37:25,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:25,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:25,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:25,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-03-10 23:37:25,452 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 [2021-03-10 23:37:25,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:25,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:25,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:25,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2021-03-10 23:37:25,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:25,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:25,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:25,486 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 38 treesize of output 17 [2021-03-10 23:37:25,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:25,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:25,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:25,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:19 [2021-03-10 23:37:25,516 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 [2021-03-10 23:37:25,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:25,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:25,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:25,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:37:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:25,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:25,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:37:25,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689725105] [2021-03-10 23:37:25,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:37:25,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:25,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:37:25,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:25,547 INFO L87 Difference]: Start difference. First operand 8890 states and 32958 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) [2021-03-10 23:37:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:25,892 INFO L93 Difference]: Finished difference Result 9061 states and 33449 transitions. [2021-03-10 23:37:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:37:25,893 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 [2021-03-10 23:37:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:25,911 INFO L225 Difference]: With dead ends: 9061 [2021-03-10 23:37:25,911 INFO L226 Difference]: Without dead ends: 9036 [2021-03-10 23:37:25,911 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:37:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2021-03-10 23:37:26,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 8911. [2021-03-10 23:37:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8911 states, 8910 states have (on average 3.7072951739618407) internal successors, (33032), 8910 states have internal predecessors, (33032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8911 states to 8911 states and 33032 transitions. [2021-03-10 23:37:26,049 INFO L78 Accepts]: Start accepts. Automaton has 8911 states and 33032 transitions. Word has length 28 [2021-03-10 23:37:26,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:26,049 INFO L480 AbstractCegarLoop]: Abstraction has 8911 states and 33032 transitions. [2021-03-10 23:37:26,050 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) [2021-03-10 23:37:26,050 INFO L276 IsEmpty]: Start isEmpty. Operand 8911 states and 33032 transitions. [2021-03-10 23:37:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:26,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:26,065 INFO L519 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] [2021-03-10 23:37:26,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:26,265 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:26,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1118853424, now seen corresponding path program 40 times [2021-03-10 23:37:26,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:26,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639201074] [2021-03-10 23:37:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:26,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639201074] [2021-03-10 23:37:26,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274605112] [2021-03-10 23:37:26,479 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 [2021-03-10 23:37:26,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:37:26,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:26,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:26,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:26,678 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 [2021-03-10 23:37:26,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:26,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:26,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:26,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-03-10 23:37:26,720 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 [2021-03-10 23:37:26,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:26,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:26,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:26,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:54 [2021-03-10 23:37:26,756 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 [2021-03-10 23:37:26,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:26,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:26,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:26,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-03-10 23:37:26,790 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 [2021-03-10 23:37:26,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:26,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:26,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:26,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 23:37:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:26,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:26,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:37:26,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411963582] [2021-03-10 23:37:26,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:37:26,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:37:26,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:26,817 INFO L87 Difference]: Start difference. First operand 8911 states and 33032 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) [2021-03-10 23:37:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:27,185 INFO L93 Difference]: Finished difference Result 9039 states and 33410 transitions. [2021-03-10 23:37:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:37:27,186 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 [2021-03-10 23:37:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:27,204 INFO L225 Difference]: With dead ends: 9039 [2021-03-10 23:37:27,204 INFO L226 Difference]: Without dead ends: 9024 [2021-03-10 23:37:27,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 350.5ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:37:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9024 states. [2021-03-10 23:37:27,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9024 to 8918. [2021-03-10 23:37:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8918 states, 8917 states have (on average 3.7077492430189527) internal successors, (33062), 8917 states have internal predecessors, (33062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8918 states to 8918 states and 33062 transitions. [2021-03-10 23:37:27,340 INFO L78 Accepts]: Start accepts. Automaton has 8918 states and 33062 transitions. Word has length 28 [2021-03-10 23:37:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:27,340 INFO L480 AbstractCegarLoop]: Abstraction has 8918 states and 33062 transitions. [2021-03-10 23:37:27,340 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) [2021-03-10 23:37:27,340 INFO L276 IsEmpty]: Start isEmpty. Operand 8918 states and 33062 transitions. [2021-03-10 23:37:27,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:27,356 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:27,356 INFO L519 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] [2021-03-10 23:37:27,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:27,567 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:27,567 INFO L82 PathProgramCache]: Analyzing trace with hash -990845068, now seen corresponding path program 41 times [2021-03-10 23:37:27,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:27,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95360306] [2021-03-10 23:37:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:27,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95360306] [2021-03-10 23:37:27,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731794906] [2021-03-10 23:37:27,773 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) [2021-03-10 23:37:27,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:37:27,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:27,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:27,829 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 [2021-03-10 23:37:27,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:27,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:27,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:27,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:37:28,011 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_55], 2=[A]} [2021-03-10 23:37:28,013 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 [2021-03-10 23:37:28,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:28,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:28,024 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 [2021-03-10 23:37:28,025 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:37:28,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:28,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:28,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:28,035 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 [2021-03-10 23:37:28,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:28,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:28,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:28,041 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:37:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:28,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:28,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:28,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921086135] [2021-03-10 23:37:28,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:28,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:28,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:28,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:28,058 INFO L87 Difference]: Start difference. First operand 8918 states and 33062 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) [2021-03-10 23:37:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:28,751 INFO L93 Difference]: Finished difference Result 11994 states and 43408 transitions. [2021-03-10 23:37:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:37:28,751 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 [2021-03-10 23:37:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:28,778 INFO L225 Difference]: With dead ends: 11994 [2021-03-10 23:37:28,778 INFO L226 Difference]: Without dead ends: 11954 [2021-03-10 23:37:28,778 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:37:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11954 states. [2021-03-10 23:37:28,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11954 to 8959. [2021-03-10 23:37:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8959 states, 8958 states have (on average 3.7052913596784998) internal successors, (33192), 8958 states have internal predecessors, (33192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8959 states to 8959 states and 33192 transitions. [2021-03-10 23:37:28,934 INFO L78 Accepts]: Start accepts. Automaton has 8959 states and 33192 transitions. Word has length 28 [2021-03-10 23:37:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:28,934 INFO L480 AbstractCegarLoop]: Abstraction has 8959 states and 33192 transitions. [2021-03-10 23:37:28,934 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) [2021-03-10 23:37:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 8959 states and 33192 transitions. [2021-03-10 23:37:28,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:28,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:28,950 INFO L519 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] [2021-03-10 23:37:29,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:29,150 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:29,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:29,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1275724212, now seen corresponding path program 42 times [2021-03-10 23:37:29,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:29,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380443835] [2021-03-10 23:37:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:29,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380443835] [2021-03-10 23:37:29,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962424239] [2021-03-10 23:37:29,353 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 [2021-03-10 23:37:29,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:37:29,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:29,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:29,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:29,406 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 12 treesize of output 11 [2021-03-10 23:37:29,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:29,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:29,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:29,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:37:29,536 INFO L446 ElimStorePlain]: Different costs {0=[v_C_57], 2=[A]} [2021-03-10 23:37:29,539 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 [2021-03-10 23:37:29,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:29,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:29,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:29,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:29,554 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 [2021-03-10 23:37:29,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:29,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:29,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:29,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-03-10 23:37:29,586 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 [2021-03-10 23:37:29,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:29,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:29,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:29,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:37:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:29,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:29,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:29,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343133908] [2021-03-10 23:37:29,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:29,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:29,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:29,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:29,612 INFO L87 Difference]: Start difference. First operand 8959 states and 33192 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) [2021-03-10 23:37:30,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:30,351 INFO L93 Difference]: Finished difference Result 12039 states and 43536 transitions. [2021-03-10 23:37:30,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:37:30,351 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 [2021-03-10 23:37:30,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:30,380 INFO L225 Difference]: With dead ends: 12039 [2021-03-10 23:37:30,380 INFO L226 Difference]: Without dead ends: 11969 [2021-03-10 23:37:30,381 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 541.8ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:37:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11969 states. [2021-03-10 23:37:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11969 to 8962. [2021-03-10 23:37:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8962 states, 8961 states have (on average 3.704497265930142) internal successors, (33196), 8961 states have internal predecessors, (33196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8962 states to 8962 states and 33196 transitions. [2021-03-10 23:37:30,533 INFO L78 Accepts]: Start accepts. Automaton has 8962 states and 33196 transitions. Word has length 28 [2021-03-10 23:37:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:30,534 INFO L480 AbstractCegarLoop]: Abstraction has 8962 states and 33196 transitions. [2021-03-10 23:37:30,534 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) [2021-03-10 23:37:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 8962 states and 33196 transitions. [2021-03-10 23:37:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:30,548 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:30,548 INFO L519 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] [2021-03-10 23:37:30,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-03-10 23:37:30,750 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:30,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1941430964, now seen corresponding path program 43 times [2021-03-10 23:37:30,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:30,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141262980] [2021-03-10 23:37:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:30,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141262980] [2021-03-10 23:37:30,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905149054] [2021-03-10 23:37:30,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:30,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:30,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:31,008 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 [2021-03-10 23:37:31,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:31,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:31,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:31,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:37:31,118 INFO L446 ElimStorePlain]: Different costs {0=[v_C_59], 3=[A]} [2021-03-10 23:37:31,121 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 [2021-03-10 23:37:31,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:31,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:31,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:31,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:31,136 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 [2021-03-10 23:37:31,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:31,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:31,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:31,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-03-10 23:37:31,194 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 [2021-03-10 23:37:31,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:31,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:31,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:31,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:37:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:31,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:31,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:31,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474613846] [2021-03-10 23:37:31,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:31,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:31,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:31,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:31,222 INFO L87 Difference]: Start difference. First operand 8962 states and 33196 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) [2021-03-10 23:37:31,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:31,852 INFO L93 Difference]: Finished difference Result 12008 states and 43454 transitions. [2021-03-10 23:37:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:37:31,852 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 [2021-03-10 23:37:31,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:31,878 INFO L225 Difference]: With dead ends: 12008 [2021-03-10 23:37:31,878 INFO L226 Difference]: Without dead ends: 11982 [2021-03-10 23:37:31,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:37:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11982 states. [2021-03-10 23:37:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11982 to 8977. [2021-03-10 23:37:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8977 states, 8976 states have (on average 3.7040998217468806) internal successors, (33248), 8976 states have internal predecessors, (33248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8977 states to 8977 states and 33248 transitions. [2021-03-10 23:37:32,030 INFO L78 Accepts]: Start accepts. Automaton has 8977 states and 33248 transitions. Word has length 28 [2021-03-10 23:37:32,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:32,030 INFO L480 AbstractCegarLoop]: Abstraction has 8977 states and 33248 transitions. [2021-03-10 23:37:32,030 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) [2021-03-10 23:37:32,030 INFO L276 IsEmpty]: Start isEmpty. Operand 8977 states and 33248 transitions. [2021-03-10 23:37:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:32,045 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:32,045 INFO L519 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] [2021-03-10 23:37:32,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:32,246 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:32,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:32,246 INFO L82 PathProgramCache]: Analyzing trace with hash 664331920, now seen corresponding path program 44 times [2021-03-10 23:37:32,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:32,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659793081] [2021-03-10 23:37:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:32,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659793081] [2021-03-10 23:37:32,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859739801] [2021-03-10 23:37:32,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:32,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:37:32,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:32,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:32,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:32,549 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 [2021-03-10 23:37:32,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:32,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:32,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:32,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-03-10 23:37:32,730 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_61], 2=[A]} [2021-03-10 23:37:32,735 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 [2021-03-10 23:37:32,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:32,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:32,748 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 [2021-03-10 23:37:32,749 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:37:32,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:32,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:32,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:32,759 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 [2021-03-10 23:37:32,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:32,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:32,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:32,766 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:37:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:32,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:32,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:32,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184780423] [2021-03-10 23:37:32,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:32,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:32,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:32,782 INFO L87 Difference]: Start difference. First operand 8977 states and 33248 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) [2021-03-10 23:37:33,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:33,498 INFO L93 Difference]: Finished difference Result 12038 states and 43542 transitions. [2021-03-10 23:37:33,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:37:33,498 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 [2021-03-10 23:37:33,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:33,531 INFO L225 Difference]: With dead ends: 12038 [2021-03-10 23:37:33,532 INFO L226 Difference]: Without dead ends: 11975 [2021-03-10 23:37:33,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 567.1ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:37:33,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11975 states. [2021-03-10 23:37:33,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11975 to 9003. [2021-03-10 23:37:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9003 states, 9002 states have (on average 3.7020662075094424) internal successors, (33326), 9002 states have internal predecessors, (33326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9003 states to 9003 states and 33326 transitions. [2021-03-10 23:37:33,708 INFO L78 Accepts]: Start accepts. Automaton has 9003 states and 33326 transitions. Word has length 28 [2021-03-10 23:37:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:33,708 INFO L480 AbstractCegarLoop]: Abstraction has 9003 states and 33326 transitions. [2021-03-10 23:37:33,708 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) [2021-03-10 23:37:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 9003 states and 33326 transitions. [2021-03-10 23:37:33,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:33,725 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:33,726 INFO L519 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] [2021-03-10 23:37:33,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-03-10 23:37:33,926 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:33,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:33,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1364066096, now seen corresponding path program 45 times [2021-03-10 23:37:33,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:33,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473346981] [2021-03-10 23:37:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:34,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473346981] [2021-03-10 23:37:34,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193931324] [2021-03-10 23:37:34,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:34,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:37:34,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:34,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:34,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:34,227 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 [2021-03-10 23:37:34,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:34,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:34,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:34,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:37:34,354 INFO L446 ElimStorePlain]: Different costs {0=[v_C_63], 3=[A]} [2021-03-10 23:37:34,356 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 [2021-03-10 23:37:34,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:34,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:34,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:34,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:34,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:37:34,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:34,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:34,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:34,385 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:35 [2021-03-10 23:37:34,408 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 [2021-03-10 23:37:34,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:34,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:34,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:34,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:37:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:34,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:34,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:34,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509747000] [2021-03-10 23:37:34,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:34,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:34,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:34,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:34,436 INFO L87 Difference]: Start difference. First operand 9003 states and 33326 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) [2021-03-10 23:37:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:35,068 INFO L93 Difference]: Finished difference Result 12092 states and 43687 transitions. [2021-03-10 23:37:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:37:35,068 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 [2021-03-10 23:37:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:35,096 INFO L225 Difference]: With dead ends: 12092 [2021-03-10 23:37:35,096 INFO L226 Difference]: Without dead ends: 12020 [2021-03-10 23:37:35,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 539.7ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:37:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12020 states. [2021-03-10 23:37:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12020 to 8994. [2021-03-10 23:37:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8994 states, 8993 states have (on average 3.7032136105860114) internal successors, (33303), 8993 states have internal predecessors, (33303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:35,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8994 states to 8994 states and 33303 transitions. [2021-03-10 23:37:35,256 INFO L78 Accepts]: Start accepts. Automaton has 8994 states and 33303 transitions. Word has length 28 [2021-03-10 23:37:35,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:35,256 INFO L480 AbstractCegarLoop]: Abstraction has 8994 states and 33303 transitions. [2021-03-10 23:37:35,256 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) [2021-03-10 23:37:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand 8994 states and 33303 transitions. [2021-03-10 23:37:35,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:35,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:35,272 INFO L519 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] [2021-03-10 23:37:35,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:35,473 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:35,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:35,473 INFO L82 PathProgramCache]: Analyzing trace with hash -428132080, now seen corresponding path program 46 times [2021-03-10 23:37:35,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:35,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320607935] [2021-03-10 23:37:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:35,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320607935] [2021-03-10 23:37:35,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942246489] [2021-03-10 23:37:35,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:35,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:37:35,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:35,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:35,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:35,733 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 [2021-03-10 23:37:35,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:35,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:35,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:35,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-03-10 23:37:35,863 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 [2021-03-10 23:37:35,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:35,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:35,868 INFO L518 ElimStorePlain]: Eliminatee v_C_65 vanished before elimination [2021-03-10 23:37:35,869 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 [2021-03-10 23:37:35,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:35,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:35,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:35,872 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-03-10 23:37:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:35,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:35,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:37:35,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599146478] [2021-03-10 23:37:35,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:37:35,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:35,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:37:35,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:35,889 INFO L87 Difference]: Start difference. First operand 8994 states and 33303 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:36,757 INFO L93 Difference]: Finished difference Result 13307 states and 47843 transitions. [2021-03-10 23:37:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:37:36,758 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 [2021-03-10 23:37:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:36,787 INFO L225 Difference]: With dead ends: 13307 [2021-03-10 23:37:36,787 INFO L226 Difference]: Without dead ends: 13267 [2021-03-10 23:37:36,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 700.4ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:37:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13267 states. [2021-03-10 23:37:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13267 to 9009. [2021-03-10 23:37:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9009 states, 9008 states have (on average 3.7028197158081704) internal successors, (33355), 9008 states have internal predecessors, (33355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9009 states to 9009 states and 33355 transitions. [2021-03-10 23:37:37,046 INFO L78 Accepts]: Start accepts. Automaton has 9009 states and 33355 transitions. Word has length 28 [2021-03-10 23:37:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:37,046 INFO L480 AbstractCegarLoop]: Abstraction has 9009 states and 33355 transitions. [2021-03-10 23:37:37,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:37,046 INFO L276 IsEmpty]: Start isEmpty. Operand 9009 states and 33355 transitions. [2021-03-10 23:37:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:37,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:37,063 INFO L519 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] [2021-03-10 23:37:37,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-03-10 23:37:37,267 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:37,267 INFO L82 PathProgramCache]: Analyzing trace with hash -297167724, now seen corresponding path program 47 times [2021-03-10 23:37:37,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:37,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310321310] [2021-03-10 23:37:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:37,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310321310] [2021-03-10 23:37:37,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887718680] [2021-03-10 23:37:37,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:37:37,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:37:37,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:37,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:37:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:37,638 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 [2021-03-10 23:37:37,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:37,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:37,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:37,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-03-10 23:37:37,854 INFO L446 ElimStorePlain]: Different costs {0=[v_C_67], 6=[B]} [2021-03-10 23:37:37,857 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 [2021-03-10 23:37:37,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:37,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:37,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:37,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:37,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:37,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:37,876 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 37 treesize of output 25 [2021-03-10 23:37:37,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:37,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:37,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:37,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:35 [2021-03-10 23:37:37,920 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 [2021-03-10 23:37:37,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:37,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:37,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:37,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-03-10 23:37:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:37,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:37,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-10 23:37:37,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555498596] [2021-03-10 23:37:37,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:37:37,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:37,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:37:37,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:37:37,973 INFO L87 Difference]: Start difference. First operand 9009 states and 33355 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) [2021-03-10 23:37:39,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:39,480 INFO L93 Difference]: Finished difference Result 11988 states and 43387 transitions. [2021-03-10 23:37:39,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:37:39,481 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 [2021-03-10 23:37:39,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:39,510 INFO L225 Difference]: With dead ends: 11988 [2021-03-10 23:37:39,511 INFO L226 Difference]: Without dead ends: 11958 [2021-03-10 23:37:39,511 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1206.4ms TimeCoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:37:39,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11958 states. [2021-03-10 23:37:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11958 to 9001. [2021-03-10 23:37:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9001 states, 9000 states have (on average 3.703888888888889) internal successors, (33335), 9000 states have internal predecessors, (33335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 33335 transitions. [2021-03-10 23:37:39,698 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 33335 transitions. Word has length 28 [2021-03-10 23:37:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:39,698 INFO L480 AbstractCegarLoop]: Abstraction has 9001 states and 33335 transitions. [2021-03-10 23:37:39,698 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) [2021-03-10 23:37:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 33335 transitions. [2021-03-10 23:37:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:39,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:39,717 INFO L519 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] [2021-03-10 23:37:39,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-10 23:37:39,918 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:39,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:39,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1273657876, now seen corresponding path program 48 times [2021-03-10 23:37:39,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:39,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625113789] [2021-03-10 23:37:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:40,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625113789] [2021-03-10 23:37:40,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258917593] [2021-03-10 23:37:40,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:40,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:37:40,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:40,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:40,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:40,219 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 [2021-03-10 23:37:40,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:40,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:40,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:40,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-03-10 23:37:40,305 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 [2021-03-10 23:37:40,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:40,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:40,314 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 [2021-03-10 23:37:40,316 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:37:40,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:40,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:40,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-03-10 23:37:40,344 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 [2021-03-10 23:37:40,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:40,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:40,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:40,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:37:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:40,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:40,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:37:40,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417410567] [2021-03-10 23:37:40,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:37:40,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:40,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:37:40,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:40,371 INFO L87 Difference]: Start difference. First operand 9001 states and 33335 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) [2021-03-10 23:37:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:41,349 INFO L93 Difference]: Finished difference Result 14317 states and 51266 transitions. [2021-03-10 23:37:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:37:41,350 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 [2021-03-10 23:37:41,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:41,382 INFO L225 Difference]: With dead ends: 14317 [2021-03-10 23:37:41,382 INFO L226 Difference]: Without dead ends: 14302 [2021-03-10 23:37:41,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 848.8ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:37:41,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14302 states. [2021-03-10 23:37:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14302 to 9011. [2021-03-10 23:37:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9011 states, 9010 states have (on average 3.704661487236404) internal successors, (33379), 9010 states have internal predecessors, (33379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9011 states to 9011 states and 33379 transitions. [2021-03-10 23:37:41,614 INFO L78 Accepts]: Start accepts. Automaton has 9011 states and 33379 transitions. Word has length 28 [2021-03-10 23:37:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:41,615 INFO L480 AbstractCegarLoop]: Abstraction has 9011 states and 33379 transitions. [2021-03-10 23:37:41,615 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) [2021-03-10 23:37:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 9011 states and 33379 transitions. [2021-03-10 23:37:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:41,630 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:41,630 INFO L519 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] [2021-03-10 23:37:41,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:41,830 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:41,831 INFO L82 PathProgramCache]: Analyzing trace with hash -831202636, now seen corresponding path program 49 times [2021-03-10 23:37:41,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:41,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800844010] [2021-03-10 23:37:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:42,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800844010] [2021-03-10 23:37:42,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367996492] [2021-03-10 23:37:42,039 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 [2021-03-10 23:37:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:42,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:37:42,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:42,095 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 18 treesize of output 17 [2021-03-10 23:37:42,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:42,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:42,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:42,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:59 [2021-03-10 23:37:42,173 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 [2021-03-10 23:37:42,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:42,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:42,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:42,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:43 [2021-03-10 23:37:42,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:42,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:42,232 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 [2021-03-10 23:37:42,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:42,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:42,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:42,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:32 [2021-03-10 23:37:42,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:42,290 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 [2021-03-10 23:37:42,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:42,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:42,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:42,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:58 [2021-03-10 23:37:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:42,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:42,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 23:37:42,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861860923] [2021-03-10 23:37:42,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:37:42,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:42,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:37:42,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:42,366 INFO L87 Difference]: Start difference. First operand 9011 states and 33379 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:42,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:42,881 INFO L93 Difference]: Finished difference Result 9182 states and 33862 transitions. [2021-03-10 23:37:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:37:42,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:37:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:42,901 INFO L225 Difference]: With dead ends: 9182 [2021-03-10 23:37:42,901 INFO L226 Difference]: Without dead ends: 9139 [2021-03-10 23:37:42,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:37:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9139 states. [2021-03-10 23:37:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9139 to 9028. [2021-03-10 23:37:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9028 states, 9027 states have (on average 3.7033344411210813) internal successors, (33430), 9027 states have internal predecessors, (33430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9028 states to 9028 states and 33430 transitions. [2021-03-10 23:37:43,032 INFO L78 Accepts]: Start accepts. Automaton has 9028 states and 33430 transitions. Word has length 28 [2021-03-10 23:37:43,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:43,032 INFO L480 AbstractCegarLoop]: Abstraction has 9028 states and 33430 transitions. [2021-03-10 23:37:43,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:43,032 INFO L276 IsEmpty]: Start isEmpty. Operand 9028 states and 33430 transitions. [2021-03-10 23:37:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:43,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:43,046 INFO L519 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] [2021-03-10 23:37:43,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:43,247 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:43,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:43,247 INFO L82 PathProgramCache]: Analyzing trace with hash 156288976, now seen corresponding path program 50 times [2021-03-10 23:37:43,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:43,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165631495] [2021-03-10 23:37:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:43,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165631495] [2021-03-10 23:37:43,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050928701] [2021-03-10 23:37:43,480 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 [2021-03-10 23:37:43,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:37:43,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:43,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:43,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:43,533 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 [2021-03-10 23:37:43,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:43,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:43,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:43,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:37:43,613 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 [2021-03-10 23:37:43,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:43,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:43,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:43,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:40 [2021-03-10 23:37:43,656 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 [2021-03-10 23:37:43,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:43,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:43,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:43,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-03-10 23:37:43,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:43,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:43,696 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 [2021-03-10 23:37:43,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:43,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:43,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:43,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-03-10 23:37:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:43,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:43,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354753177] [2021-03-10 23:37:43,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:43,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:43,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:43,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:43,733 INFO L87 Difference]: Start difference. First operand 9028 states and 33430 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) [2021-03-10 23:37:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:44,122 INFO L93 Difference]: Finished difference Result 9154 states and 33788 transitions. [2021-03-10 23:37:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:37:44,123 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 [2021-03-10 23:37:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:44,145 INFO L225 Difference]: With dead ends: 9154 [2021-03-10 23:37:44,145 INFO L226 Difference]: Without dead ends: 9133 [2021-03-10 23:37:44,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 351.7ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9133 states. [2021-03-10 23:37:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9133 to 9043. [2021-03-10 23:37:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9043 states, 9042 states have (on average 3.7029418270294183) internal successors, (33482), 9042 states have internal predecessors, (33482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9043 states to 9043 states and 33482 transitions. [2021-03-10 23:37:44,281 INFO L78 Accepts]: Start accepts. Automaton has 9043 states and 33482 transitions. Word has length 28 [2021-03-10 23:37:44,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:44,281 INFO L480 AbstractCegarLoop]: Abstraction has 9043 states and 33482 transitions. [2021-03-10 23:37:44,281 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) [2021-03-10 23:37:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 9043 states and 33482 transitions. [2021-03-10 23:37:44,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:44,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:44,296 INFO L519 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] [2021-03-10 23:37:44,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:44,496 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:44,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:44,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2126766028, now seen corresponding path program 51 times [2021-03-10 23:37:44,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:44,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346535234] [2021-03-10 23:37:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:44,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346535234] [2021-03-10 23:37:44,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744857777] [2021-03-10 23:37:44,697 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 [2021-03-10 23:37:44,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:37:44,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:44,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:37:44,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:44,748 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 [2021-03-10 23:37:44,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:44,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:44,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:44,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-10 23:37:44,820 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 [2021-03-10 23:37:44,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:44,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:44,836 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. [2021-03-10 23:37:44,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:46 [2021-03-10 23:37:44,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:44,884 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 [2021-03-10 23:37:44,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:44,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:44,922 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. [2021-03-10 23:37:44,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:76 [2021-03-10 23:37:45,349 INFO L446 ElimStorePlain]: Different costs {0=[B], 2=[v_prenex_5, v_prenex_6]} [2021-03-10 23:37:45,353 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 [2021-03-10 23:37:45,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:45,423 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.9 percent of original size [2021-03-10 23:37:45,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:45,426 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 30 treesize of output 18 [2021-03-10 23:37:45,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:45,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:45,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:45,456 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 [2021-03-10 23:37:45,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:45,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:45,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:37:45,480 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:107, output treesize:62 [2021-03-10 23:37:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:45,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:45,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-03-10 23:37:45,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111105822] [2021-03-10 23:37:45,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:37:45,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:45,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:37:45,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:37:45,617 INFO L87 Difference]: Start difference. First operand 9043 states and 33482 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:46,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:46,902 INFO L93 Difference]: Finished difference Result 9485 states and 34717 transitions. [2021-03-10 23:37:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 23:37:46,903 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:37:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:46,921 INFO L225 Difference]: With dead ends: 9485 [2021-03-10 23:37:46,921 INFO L226 Difference]: Without dead ends: 9455 [2021-03-10 23:37:46,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1054.0ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:37:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9455 states. [2021-03-10 23:37:47,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9455 to 9075. [2021-03-10 23:37:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9075 states, 9074 states have (on average 3.7036588053780033) internal successors, (33607), 9074 states have internal predecessors, (33607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 33607 transitions. [2021-03-10 23:37:47,048 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 33607 transitions. Word has length 28 [2021-03-10 23:37:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:47,048 INFO L480 AbstractCegarLoop]: Abstraction has 9075 states and 33607 transitions. [2021-03-10 23:37:47,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 33607 transitions. [2021-03-10 23:37:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:47,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:47,062 INFO L519 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] [2021-03-10 23:37:47,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-10 23:37:47,262 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:47,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1959867984, now seen corresponding path program 52 times [2021-03-10 23:37:47,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:47,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211728231] [2021-03-10 23:37:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:47,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211728231] [2021-03-10 23:37:47,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462656901] [2021-03-10 23:37:47,468 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) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:47,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:37:47,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:47,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:37:47,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:47,527 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 [2021-03-10 23:37:47,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:47,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:47,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:47,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-03-10 23:37:47,586 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 [2021-03-10 23:37:47,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:47,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:47,605 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. [2021-03-10 23:37:47,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:51 [2021-03-10 23:37:47,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:47,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:47,687 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 42 [2021-03-10 23:37:47,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:47,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:47,725 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. [2021-03-10 23:37:47,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:75 [2021-03-10 23:37:48,091 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 [2021-03-10 23:37:48,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:48,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:48,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:48,096 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 30 treesize of output 18 [2021-03-10 23:37:48,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:48,114 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:37:48,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 33 [2021-03-10 23:37:48,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:48,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:48,119 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 22 treesize of output 11 [2021-03-10 23:37:48,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:48,160 INFO L628 ElimStorePlain]: treesize reduction 39, result has 56.7 percent of original size [2021-03-10 23:37:48,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:37:48,162 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:151, output treesize:45 [2021-03-10 23:37:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:48,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:48,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 23:37:48,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838998707] [2021-03-10 23:37:48,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:37:48,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:48,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:37:48,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:48,218 INFO L87 Difference]: Start difference. First operand 9075 states and 33607 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:49,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:49,025 INFO L93 Difference]: Finished difference Result 9269 states and 34154 transitions. [2021-03-10 23:37:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:37:49,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:37:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:49,043 INFO L225 Difference]: With dead ends: 9269 [2021-03-10 23:37:49,043 INFO L226 Difference]: Without dead ends: 9238 [2021-03-10 23:37:49,044 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 708.2ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:37:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9238 states. [2021-03-10 23:37:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9238 to 9084. [2021-03-10 23:37:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9084 states, 9083 states have (on average 3.703732247054938) internal successors, (33641), 9083 states have internal predecessors, (33641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9084 states to 9084 states and 33641 transitions. [2021-03-10 23:37:49,168 INFO L78 Accepts]: Start accepts. Automaton has 9084 states and 33641 transitions. Word has length 28 [2021-03-10 23:37:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:49,168 INFO L480 AbstractCegarLoop]: Abstraction has 9084 states and 33641 transitions. [2021-03-10 23:37:49,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 9084 states and 33641 transitions. [2021-03-10 23:37:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:49,182 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:49,182 INFO L519 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] [2021-03-10 23:37:49,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-10 23:37:49,383 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash -182048560, now seen corresponding path program 53 times [2021-03-10 23:37:49,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:49,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719489430] [2021-03-10 23:37:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:49,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719489430] [2021-03-10 23:37:49,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126616402] [2021-03-10 23:37:49,568 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) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:49,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:37:49,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:49,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:49,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:49,621 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 12 treesize of output 11 [2021-03-10 23:37:49,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:49,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:49,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:49,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:37:49,668 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 [2021-03-10 23:37:49,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:49,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:49,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:49,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:42 [2021-03-10 23:37:49,742 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 [2021-03-10 23:37:49,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:49,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:49,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:49,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-03-10 23:37:49,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:49,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:49,782 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 [2021-03-10 23:37:49,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:49,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:49,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:49,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-03-10 23:37:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:49,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:49,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:49,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437603531] [2021-03-10 23:37:49,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:49,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:49,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:49,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:49,815 INFO L87 Difference]: Start difference. First operand 9084 states and 33641 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) [2021-03-10 23:37:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:50,317 INFO L93 Difference]: Finished difference Result 9236 states and 34087 transitions. [2021-03-10 23:37:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:37:50,318 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 [2021-03-10 23:37:50,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:50,336 INFO L225 Difference]: With dead ends: 9236 [2021-03-10 23:37:50,336 INFO L226 Difference]: Without dead ends: 9221 [2021-03-10 23:37:50,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:37:50,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9221 states. [2021-03-10 23:37:50,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9221 to 9100. [2021-03-10 23:37:50,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9100 states, 9099 states have (on average 3.702274975272008) internal successors, (33687), 9099 states have internal predecessors, (33687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9100 states to 9100 states and 33687 transitions. [2021-03-10 23:37:50,462 INFO L78 Accepts]: Start accepts. Automaton has 9100 states and 33687 transitions. Word has length 28 [2021-03-10 23:37:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:50,462 INFO L480 AbstractCegarLoop]: Abstraction has 9100 states and 33687 transitions. [2021-03-10 23:37:50,462 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) [2021-03-10 23:37:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 9100 states and 33687 transitions. [2021-03-10 23:37:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:50,476 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:50,476 INFO L519 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] [2021-03-10 23:37:50,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:50,676 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:50,677 INFO L82 PathProgramCache]: Analyzing trace with hash -853966448, now seen corresponding path program 54 times [2021-03-10 23:37:50,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:50,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977050956] [2021-03-10 23:37:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:50,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977050956] [2021-03-10 23:37:50,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264809111] [2021-03-10 23:37:50,865 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 [2021-03-10 23:37:50,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:37:50,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:50,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:37:50,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:50,996 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 [2021-03-10 23:37:50,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:51,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:51,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:51,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-03-10 23:37:51,138 INFO L446 ElimStorePlain]: Different costs {0=[v_C_81], 2=[A, B]} [2021-03-10 23:37:51,140 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 [2021-03-10 23:37:51,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:51,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:51,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:51,164 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 [2021-03-10 23:37:51,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:37:51,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:51,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:51,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 59 [2021-03-10 23:37:51,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:37:51,250 INFO L628 ElimStorePlain]: treesize reduction 28, result has 59.4 percent of original size [2021-03-10 23:37:51,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:51,259 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:82 [2021-03-10 23:37:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:51,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:51,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-10 23:37:51,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643715182] [2021-03-10 23:37:51,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:37:51,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:51,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:37:51,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:37:51,327 INFO L87 Difference]: Start difference. First operand 9100 states and 33687 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) [2021-03-10 23:37:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:53,737 INFO L93 Difference]: Finished difference Result 14592 states and 52060 transitions. [2021-03-10 23:37:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:37:53,738 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 [2021-03-10 23:37:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:53,772 INFO L225 Difference]: With dead ends: 14592 [2021-03-10 23:37:53,772 INFO L226 Difference]: Without dead ends: 14502 [2021-03-10 23:37:53,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1771.4ms TimeCoverageRelationStatistics Valid=345, Invalid=2105, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:37:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14502 states. [2021-03-10 23:37:53,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14502 to 9107. [2021-03-10 23:37:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9107 states, 9106 states have (on average 3.7019547551065233) internal successors, (33710), 9106 states have internal predecessors, (33710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9107 states to 9107 states and 33710 transitions. [2021-03-10 23:37:53,955 INFO L78 Accepts]: Start accepts. Automaton has 9107 states and 33710 transitions. Word has length 28 [2021-03-10 23:37:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:53,955 INFO L480 AbstractCegarLoop]: Abstraction has 9107 states and 33710 transitions. [2021-03-10 23:37:53,955 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) [2021-03-10 23:37:53,956 INFO L276 IsEmpty]: Start isEmpty. Operand 9107 states and 33710 transitions. [2021-03-10 23:37:53,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:53,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:53,970 INFO L519 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] [2021-03-10 23:37:54,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-03-10 23:37:54,171 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:54,171 INFO L82 PathProgramCache]: Analyzing trace with hash -627972924, now seen corresponding path program 55 times [2021-03-10 23:37:54,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:54,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491063009] [2021-03-10 23:37:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:54,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491063009] [2021-03-10 23:37:54,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837176532] [2021-03-10 23:37:54,359 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 [2021-03-10 23:37:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:54,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:54,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:54,467 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 [2021-03-10 23:37:54,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:54,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:54,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:54,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-03-10 23:37:54,535 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 [2021-03-10 23:37:54,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:54,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:54,541 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 [2021-03-10 23:37:54,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:54,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:54,544 INFO L518 ElimStorePlain]: Eliminatee v_C_83 vanished before elimination [2021-03-10 23:37:54,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:54,544 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-03-10 23:37:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:54,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:54,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:37:54,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233643004] [2021-03-10 23:37:54,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:37:54,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:54,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:37:54,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:54,565 INFO L87 Difference]: Start difference. First operand 9107 states and 33710 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) [2021-03-10 23:37:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:55,898 INFO L93 Difference]: Finished difference Result 15411 states and 54909 transitions. [2021-03-10 23:37:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:37:55,899 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 [2021-03-10 23:37:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:55,929 INFO L225 Difference]: With dead ends: 15411 [2021-03-10 23:37:55,929 INFO L226 Difference]: Without dead ends: 15378 [2021-03-10 23:37:55,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1051.2ms TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:37:55,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15378 states. [2021-03-10 23:37:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15378 to 9081. [2021-03-10 23:37:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9081 states, 9080 states have (on average 3.70363436123348) internal successors, (33629), 9080 states have internal predecessors, (33629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9081 states to 9081 states and 33629 transitions. [2021-03-10 23:37:56,112 INFO L78 Accepts]: Start accepts. Automaton has 9081 states and 33629 transitions. Word has length 28 [2021-03-10 23:37:56,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:56,112 INFO L480 AbstractCegarLoop]: Abstraction has 9081 states and 33629 transitions. [2021-03-10 23:37:56,112 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) [2021-03-10 23:37:56,112 INFO L276 IsEmpty]: Start isEmpty. Operand 9081 states and 33629 transitions. [2021-03-10 23:37:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:56,125 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:56,125 INFO L519 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] [2021-03-10 23:37:56,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 23:37:56,326 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:56,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1929250688, now seen corresponding path program 56 times [2021-03-10 23:37:56,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:56,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013769661] [2021-03-10 23:37:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:56,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013769661] [2021-03-10 23:37:56,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942544684] [2021-03-10 23:37:56,553 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 [2021-03-10 23:37:56,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:37:56,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:56,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:37:56,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:56,603 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 [2021-03-10 23:37:56,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:56,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:56,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:56,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:37:56,676 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 [2021-03-10 23:37:56,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:56,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:56,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:56,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:40 [2021-03-10 23:37:56,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:56,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:56,718 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 [2021-03-10 23:37:56,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:56,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:56,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:56,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:29 [2021-03-10 23:37:56,752 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 [2021-03-10 23:37:56,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:56,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:56,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:56,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:37:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:56,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:56,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:37:56,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491631658] [2021-03-10 23:37:56,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:56,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:56,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:56,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:56,778 INFO L87 Difference]: Start difference. First operand 9081 states and 33629 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) [2021-03-10 23:37:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:57,156 INFO L93 Difference]: Finished difference Result 9226 states and 34027 transitions. [2021-03-10 23:37:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:37:57,157 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 [2021-03-10 23:37:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:57,174 INFO L225 Difference]: With dead ends: 9226 [2021-03-10 23:37:57,174 INFO L226 Difference]: Without dead ends: 9183 [2021-03-10 23:37:57,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9183 states. [2021-03-10 23:37:57,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9183 to 9071. [2021-03-10 23:37:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9071 states, 9070 states have (on average 3.704410143329658) internal successors, (33599), 9070 states have internal predecessors, (33599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9071 states to 9071 states and 33599 transitions. [2021-03-10 23:37:57,296 INFO L78 Accepts]: Start accepts. Automaton has 9071 states and 33599 transitions. Word has length 28 [2021-03-10 23:37:57,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:57,296 INFO L480 AbstractCegarLoop]: Abstraction has 9071 states and 33599 transitions. [2021-03-10 23:37:57,296 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) [2021-03-10 23:37:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 9071 states and 33599 transitions. [2021-03-10 23:37:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:37:57,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:57,310 INFO L519 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] [2021-03-10 23:37:57,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-03-10 23:37:57,511 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:57,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:57,511 INFO L82 PathProgramCache]: Analyzing trace with hash -958984308, now seen corresponding path program 57 times [2021-03-10 23:37:57,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:57,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012510558] [2021-03-10 23:37:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:57,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012510558] [2021-03-10 23:37:57,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560969373] [2021-03-10 23:37:57,749 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 [2021-03-10 23:37:57,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:37:57,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:57,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:37:57,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:57,808 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 [2021-03-10 23:37:57,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:57,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:57,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:57,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-03-10 23:37:57,870 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 [2021-03-10 23:37:57,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:57,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:57,884 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. [2021-03-10 23:37:57,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:38 [2021-03-10 23:37:57,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:57,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 33 [2021-03-10 23:37:57,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:37:57,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:57,962 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. [2021-03-10 23:37:57,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:69 [2021-03-10 23:37:58,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:58,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:58,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-03-10 23:37:58,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:58,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:58,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:58,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-10 23:37:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:58,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:58,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-10 23:37:58,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889158012] [2021-03-10 23:37:58,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:37:58,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:58,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:37:58,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:37:58,438 INFO L87 Difference]: Start difference. First operand 9071 states and 33599 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:58,983 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-03-10 23:38:00,892 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 23:38:01,048 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-10 23:38:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:01,148 INFO L93 Difference]: Finished difference Result 12358 states and 44648 transitions. [2021-03-10 23:38:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:38:01,149 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:38:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:01,175 INFO L225 Difference]: With dead ends: 12358 [2021-03-10 23:38:01,175 INFO L226 Difference]: Without dead ends: 12343 [2021-03-10 23:38:01,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2509.0ms TimeCoverageRelationStatistics Valid=319, Invalid=1843, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:38:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12343 states. [2021-03-10 23:38:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12343 to 9080. [2021-03-10 23:38:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9080 states, 9079 states have (on average 3.7050335940081505) internal successors, (33638), 9079 states have internal predecessors, (33638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9080 states to 9080 states and 33638 transitions. [2021-03-10 23:38:01,329 INFO L78 Accepts]: Start accepts. Automaton has 9080 states and 33638 transitions. Word has length 28 [2021-03-10 23:38:01,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:01,329 INFO L480 AbstractCegarLoop]: Abstraction has 9080 states and 33638 transitions. [2021-03-10 23:38:01,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 9080 states and 33638 transitions. [2021-03-10 23:38:01,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:01,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:01,344 INFO L519 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] [2021-03-10 23:38:01,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:01,544 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1465330574, now seen corresponding path program 58 times [2021-03-10 23:38:01,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:01,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052589073] [2021-03-10 23:38:01,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:01,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052589073] [2021-03-10 23:38:01,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501072928] [2021-03-10 23:38:01,790 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:01,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:01,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:01,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:01,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:01,859 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 12 treesize of output 11 [2021-03-10 23:38:01,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:01,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:01,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:01,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-03-10 23:38:01,906 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 [2021-03-10 23:38:01,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:01,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:01,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:01,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:40 [2021-03-10 23:38:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:01,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:01,945 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 [2021-03-10 23:38:01,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:01,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:01,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:01,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-03-10 23:38:01,993 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 [2021-03-10 23:38:01,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:01,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:01,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:01,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:38:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:02,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:02,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:02,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321898323] [2021-03-10 23:38:02,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:02,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:02,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:02,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:02,020 INFO L87 Difference]: Start difference. First operand 9080 states and 33638 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) [2021-03-10 23:38:02,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:02,950 INFO L93 Difference]: Finished difference Result 9463 states and 34759 transitions. [2021-03-10 23:38:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:38:02,951 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 [2021-03-10 23:38:02,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:02,969 INFO L225 Difference]: With dead ends: 9463 [2021-03-10 23:38:02,969 INFO L226 Difference]: Without dead ends: 9448 [2021-03-10 23:38:02,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:38:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9448 states. [2021-03-10 23:38:03,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9448 to 9060. [2021-03-10 23:38:03,079 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) [2021-03-10 23:38:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9060 states to 9060 states and 33556 transitions. [2021-03-10 23:38:03,103 INFO L78 Accepts]: Start accepts. Automaton has 9060 states and 33556 transitions. Word has length 28 [2021-03-10 23:38:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:03,103 INFO L480 AbstractCegarLoop]: Abstraction has 9060 states and 33556 transitions. [2021-03-10 23:38:03,103 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) [2021-03-10 23:38:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 9060 states and 33556 transitions. [2021-03-10 23:38:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:03,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:03,118 INFO L519 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] [2021-03-10 23:38:03,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:03,318 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:03,319 INFO L82 PathProgramCache]: Analyzing trace with hash 861819932, now seen corresponding path program 59 times [2021-03-10 23:38:03,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:03,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255554954] [2021-03-10 23:38:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:03,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255554954] [2021-03-10 23:38:03,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873379527] [2021-03-10 23:38:03,535 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 [2021-03-10 23:38:03,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:38:03,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:03,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:03,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:03,592 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 [2021-03-10 23:38:03,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:03,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:03,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:03,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-03-10 23:38:03,648 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 [2021-03-10 23:38:03,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:03,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:03,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:03,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:42 [2021-03-10 23:38:03,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:03,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:03,725 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 [2021-03-10 23:38:03,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:03,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:03,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:03,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:35 [2021-03-10 23:38:03,765 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 [2021-03-10 23:38:03,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:03,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:03,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:03,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:38:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:03,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:03,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:03,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516219290] [2021-03-10 23:38:03,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:03,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:03,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:03,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:03,792 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) [2021-03-10 23:38:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:04,210 INFO L93 Difference]: Finished difference Result 9259 states and 34116 transitions. [2021-03-10 23:38:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:38:04,211 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 [2021-03-10 23:38:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:04,228 INFO L225 Difference]: With dead ends: 9259 [2021-03-10 23:38:04,228 INFO L226 Difference]: Without dead ends: 9234 [2021-03-10 23:38:04,229 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 383.2ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:38:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9234 states. [2021-03-10 23:38:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9234 to 9040. [2021-03-10 23:38:04,334 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) [2021-03-10 23:38:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9040 states to 9040 states and 33498 transitions. [2021-03-10 23:38:04,355 INFO L78 Accepts]: Start accepts. Automaton has 9040 states and 33498 transitions. Word has length 28 [2021-03-10 23:38:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:04,355 INFO L480 AbstractCegarLoop]: Abstraction has 9040 states and 33498 transitions. [2021-03-10 23:38:04,355 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) [2021-03-10 23:38:04,356 INFO L276 IsEmpty]: Start isEmpty. Operand 9040 states and 33498 transitions. [2021-03-10 23:38:04,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:04,368 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:04,368 INFO L519 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] [2021-03-10 23:38:04,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:04,569 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:04,569 INFO L82 PathProgramCache]: Analyzing trace with hash -23804464, now seen corresponding path program 60 times [2021-03-10 23:38:04,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:04,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003411350] [2021-03-10 23:38:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:04,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003411350] [2021-03-10 23:38:04,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325484050] [2021-03-10 23:38:04,784 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 [2021-03-10 23:38:04,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:38:04,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:04,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:04,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:04,921 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 [2021-03-10 23:38:04,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:04,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:04,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:04,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-03-10 23:38:04,964 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 [2021-03-10 23:38:04,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:04,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:04,970 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 [2021-03-10 23:38:04,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:04,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:04,973 INFO L518 ElimStorePlain]: Eliminatee v_C_93 vanished before elimination [2021-03-10 23:38:04,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:04,973 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-03-10 23:38:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:04,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:04,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:38:04,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781607619] [2021-03-10 23:38:04,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:38:04,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:38:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:04,991 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) [2021-03-10 23:38:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:06,194 INFO L93 Difference]: Finished difference Result 10525 states and 37719 transitions. [2021-03-10 23:38:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:38:06,195 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 [2021-03-10 23:38:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:06,215 INFO L225 Difference]: With dead ends: 10525 [2021-03-10 23:38:06,215 INFO L226 Difference]: Without dead ends: 10495 [2021-03-10 23:38:06,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 980.3ms TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:38:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-03-10 23:38:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 9117. [2021-03-10 23:38:06,327 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) [2021-03-10 23:38:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9117 states to 9117 states and 33761 transitions. [2021-03-10 23:38:06,348 INFO L78 Accepts]: Start accepts. Automaton has 9117 states and 33761 transitions. Word has length 28 [2021-03-10 23:38:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:06,348 INFO L480 AbstractCegarLoop]: Abstraction has 9117 states and 33761 transitions. [2021-03-10 23:38:06,348 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) [2021-03-10 23:38:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 9117 states and 33761 transitions. [2021-03-10 23:38:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:06,361 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:06,361 INFO L519 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] [2021-03-10 23:38:06,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:06,567 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:06,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:06,567 INFO L82 PathProgramCache]: Analyzing trace with hash 600854544, now seen corresponding path program 61 times [2021-03-10 23:38:06,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:06,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766980024] [2021-03-10 23:38:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:06,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766980024] [2021-03-10 23:38:06,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530444836] [2021-03-10 23:38:06,787 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 [2021-03-10 23:38:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:06,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:06,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:06,904 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 [2021-03-10 23:38:06,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:06,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:06,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:06,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-03-10 23:38:06,977 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 [2021-03-10 23:38:06,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:06,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:06,983 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 [2021-03-10 23:38:06,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:06,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:06,986 INFO L518 ElimStorePlain]: Eliminatee v_C_95 vanished before elimination [2021-03-10 23:38:06,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:06,986 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-03-10 23:38:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:07,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:07,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:38:07,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188113696] [2021-03-10 23:38:07,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:38:07,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:07,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:38:07,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:07,003 INFO L87 Difference]: Start difference. First operand 9117 states and 33761 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) [2021-03-10 23:38:07,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:07,931 INFO L93 Difference]: Finished difference Result 10439 states and 37480 transitions. [2021-03-10 23:38:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:38:07,932 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 [2021-03-10 23:38:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:07,952 INFO L225 Difference]: With dead ends: 10439 [2021-03-10 23:38:07,952 INFO L226 Difference]: Without dead ends: 10382 [2021-03-10 23:38:07,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 697.9ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:38:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10382 states. [2021-03-10 23:38:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10382 to 9142. [2021-03-10 23:38:08,062 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) [2021-03-10 23:38:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9142 states to 9142 states and 33841 transitions. [2021-03-10 23:38:08,157 INFO L78 Accepts]: Start accepts. Automaton has 9142 states and 33841 transitions. Word has length 28 [2021-03-10 23:38:08,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:08,157 INFO L480 AbstractCegarLoop]: Abstraction has 9142 states and 33841 transitions. [2021-03-10 23:38:08,157 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) [2021-03-10 23:38:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 9142 states and 33841 transitions. [2021-03-10 23:38:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:08,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:08,171 INFO L519 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] [2021-03-10 23:38:08,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:08,371 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:08,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:08,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1427543472, now seen corresponding path program 62 times [2021-03-10 23:38:08,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:08,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352443036] [2021-03-10 23:38:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:08,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352443036] [2021-03-10 23:38:08,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381816777] [2021-03-10 23:38:08,528 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 [2021-03-10 23:38:08,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:08,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:08,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:08,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:08,639 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 [2021-03-10 23:38:08,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:08,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:08,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:08,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-03-10 23:38:08,692 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 [2021-03-10 23:38:08,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:08,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:08,700 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 [2021-03-10 23:38:08,702 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:38:08,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:08,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:08,708 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-03-10 23:38:08,732 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 [2021-03-10 23:38:08,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:08,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:08,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:08,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 23:38:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:08,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:08,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:38:08,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580569889] [2021-03-10 23:38:08,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:38:08,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:38:08,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:08,760 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) [2021-03-10 23:38:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:09,092 INFO L93 Difference]: Finished difference Result 9288 states and 34273 transitions. [2021-03-10 23:38:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:38:09,093 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 [2021-03-10 23:38:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:09,110 INFO L225 Difference]: With dead ends: 9288 [2021-03-10 23:38:09,110 INFO L226 Difference]: Without dead ends: 9273 [2021-03-10 23:38:09,111 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9273 states. [2021-03-10 23:38:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9273 to 9137. [2021-03-10 23:38:09,215 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) [2021-03-10 23:38:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9137 states to 9137 states and 33839 transitions. [2021-03-10 23:38:09,238 INFO L78 Accepts]: Start accepts. Automaton has 9137 states and 33839 transitions. Word has length 28 [2021-03-10 23:38:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:09,239 INFO L480 AbstractCegarLoop]: Abstraction has 9137 states and 33839 transitions. [2021-03-10 23:38:09,239 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) [2021-03-10 23:38:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 9137 states and 33839 transitions. [2021-03-10 23:38:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:09,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:09,252 INFO L519 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] [2021-03-10 23:38:09,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 23:38:09,453 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1909688240, now seen corresponding path program 63 times [2021-03-10 23:38:09,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:09,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837726868] [2021-03-10 23:38:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:09,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837726868] [2021-03-10 23:38:09,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460383904] [2021-03-10 23:38:09,630 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) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:09,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:38:09,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:09,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:38:09,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:09,871 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 [2021-03-10 23:38:09,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:09,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:09,887 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. [2021-03-10 23:38:09,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:49 [2021-03-10 23:38:09,967 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_99], 2=[B]} [2021-03-10 23:38:09,970 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 [2021-03-10 23:38:09,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:09,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:09,979 INFO L518 ElimStorePlain]: Eliminatee v_C_99 vanished before elimination [2021-03-10 23:38:09,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:09,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:09,982 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 [2021-03-10 23:38:09,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:09,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:09,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:09,989 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:5 [2021-03-10 23:38:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:10,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:10,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-10 23:38:10,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732573619] [2021-03-10 23:38:10,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:38:10,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:10,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:38:10,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:38:10,009 INFO L87 Difference]: Start difference. First operand 9137 states and 33839 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) [2021-03-10 23:38:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:11,097 INFO L93 Difference]: Finished difference Result 11909 states and 43033 transitions. [2021-03-10 23:38:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:38:11,098 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 [2021-03-10 23:38:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:11,122 INFO L225 Difference]: With dead ends: 11909 [2021-03-10 23:38:11,123 INFO L226 Difference]: Without dead ends: 11884 [2021-03-10 23:38:11,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 818.8ms TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:38:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11884 states. [2021-03-10 23:38:11,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11884 to 9195. [2021-03-10 23:38:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9195 states, 9194 states have (on average 3.701326952360235) internal successors, (34030), 9194 states have internal predecessors, (34030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9195 states to 9195 states and 34030 transitions. [2021-03-10 23:38:11,269 INFO L78 Accepts]: Start accepts. Automaton has 9195 states and 34030 transitions. Word has length 28 [2021-03-10 23:38:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:11,269 INFO L480 AbstractCegarLoop]: Abstraction has 9195 states and 34030 transitions. [2021-03-10 23:38:11,269 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) [2021-03-10 23:38:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 9195 states and 34030 transitions. [2021-03-10 23:38:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:11,283 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:11,283 INFO L519 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] [2021-03-10 23:38:11,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-03-10 23:38:11,484 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:11,484 INFO L82 PathProgramCache]: Analyzing trace with hash -606993708, now seen corresponding path program 64 times [2021-03-10 23:38:11,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:11,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129376532] [2021-03-10 23:38:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:11,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129376532] [2021-03-10 23:38:11,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497681117] [2021-03-10 23:38:11,684 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 [2021-03-10 23:38:11,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:11,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:11,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:11,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:11,806 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 [2021-03-10 23:38:11,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:11,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:11,825 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. [2021-03-10 23:38:11,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:54 [2021-03-10 23:38:11,921 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_101], 2=[B]} [2021-03-10 23:38:11,923 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 [2021-03-10 23:38:11,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:11,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:11,936 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 [2021-03-10 23:38:11,937 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:38:11,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:11,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:11,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:11,950 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 [2021-03-10 23:38:11,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:11,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:11,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:11,958 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:38:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:11,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:11,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:11,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634964366] [2021-03-10 23:38:11,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:11,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:11,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:11,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:11,976 INFO L87 Difference]: Start difference. First operand 9195 states and 34030 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) [2021-03-10 23:38:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:12,592 INFO L93 Difference]: Finished difference Result 11741 states and 42612 transitions. [2021-03-10 23:38:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:38:12,592 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 [2021-03-10 23:38:12,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:12,611 INFO L225 Difference]: With dead ends: 11741 [2021-03-10 23:38:12,611 INFO L226 Difference]: Without dead ends: 11680 [2021-03-10 23:38:12,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:38:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11680 states. [2021-03-10 23:38:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11680 to 9212. [2021-03-10 23:38:12,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9212 states, 9211 states have (on average 3.6998154380631854) internal successors, (34079), 9211 states have internal predecessors, (34079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9212 states to 9212 states and 34079 transitions. [2021-03-10 23:38:12,736 INFO L78 Accepts]: Start accepts. Automaton has 9212 states and 34079 transitions. Word has length 28 [2021-03-10 23:38:12,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:12,736 INFO L480 AbstractCegarLoop]: Abstraction has 9212 states and 34079 transitions. [2021-03-10 23:38:12,736 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) [2021-03-10 23:38:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 9212 states and 34079 transitions. [2021-03-10 23:38:12,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:12,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:12,749 INFO L519 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] [2021-03-10 23:38:12,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-03-10 23:38:12,949 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:12,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:12,949 INFO L82 PathProgramCache]: Analyzing trace with hash 460880856, now seen corresponding path program 65 times [2021-03-10 23:38:12,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:12,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415822635] [2021-03-10 23:38:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:13,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415822635] [2021-03-10 23:38:13,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927315956] [2021-03-10 23:38:13,149 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 [2021-03-10 23:38:13,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:38:13,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:13,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:13,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:13,265 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 [2021-03-10 23:38:13,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:13,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:13,282 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. [2021-03-10 23:38:13,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-03-10 23:38:13,322 INFO L446 ElimStorePlain]: Different costs {0=[v_C_103], 2=[B]} [2021-03-10 23:38:13,324 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 [2021-03-10 23:38:13,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:13,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:13,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:13,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:13,339 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 [2021-03-10 23:38:13,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:13,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:13,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:13,350 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-03-10 23:38:13,372 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 [2021-03-10 23:38:13,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:13,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:13,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:13,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:38:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:13,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:13,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:13,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675876674] [2021-03-10 23:38:13,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:13,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:13,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:13,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:13,401 INFO L87 Difference]: Start difference. First operand 9212 states and 34079 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) [2021-03-10 23:38:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:14,099 INFO L93 Difference]: Finished difference Result 11778 states and 42745 transitions. [2021-03-10 23:38:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:38:14,099 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 [2021-03-10 23:38:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:14,122 INFO L225 Difference]: With dead ends: 11778 [2021-03-10 23:38:14,122 INFO L226 Difference]: Without dead ends: 11753 [2021-03-10 23:38:14,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 425.3ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:38:14,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11753 states. [2021-03-10 23:38:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11753 to 9199. [2021-03-10 23:38:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9199 states, 9198 states have (on average 3.702870189171559) internal successors, (34059), 9198 states have internal predecessors, (34059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9199 states to 9199 states and 34059 transitions. [2021-03-10 23:38:14,261 INFO L78 Accepts]: Start accepts. Automaton has 9199 states and 34059 transitions. Word has length 28 [2021-03-10 23:38:14,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:14,262 INFO L480 AbstractCegarLoop]: Abstraction has 9199 states and 34059 transitions. [2021-03-10 23:38:14,262 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) [2021-03-10 23:38:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 9199 states and 34059 transitions. [2021-03-10 23:38:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:14,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:14,275 INFO L519 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] [2021-03-10 23:38:14,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:14,479 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:14,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:14,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1581531380, now seen corresponding path program 66 times [2021-03-10 23:38:14,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:14,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71981495] [2021-03-10 23:38:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:14,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71981495] [2021-03-10 23:38:14,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679553734] [2021-03-10 23:38:14,743 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 [2021-03-10 23:38:14,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:38:14,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:14,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:38:14,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:14,842 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 [2021-03-10 23:38:14,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:14,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:14,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:14,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-03-10 23:38:15,001 INFO L446 ElimStorePlain]: Different costs {0=[v_C_105], 2=[A, B]} [2021-03-10 23:38:15,004 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 [2021-03-10 23:38:15,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:15,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:15,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:15,029 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 [2021-03-10 23:38:15,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:38:15,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:15,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:15,064 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 [2021-03-10 23:38:15,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:38:15,135 INFO L628 ElimStorePlain]: treesize reduction 18, result has 81.8 percent of original size [2021-03-10 23:38:15,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:15,145 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:178 [2021-03-10 23:38:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:15,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:15,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-10 23:38:15,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433578178] [2021-03-10 23:38:15,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:38:15,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:15,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:38:15,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:38:15,220 INFO L87 Difference]: Start difference. First operand 9199 states and 34059 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) [2021-03-10 23:38:16,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:16,423 INFO L93 Difference]: Finished difference Result 12150 states and 43838 transitions. [2021-03-10 23:38:16,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:38:16,424 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 [2021-03-10 23:38:16,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:16,446 INFO L225 Difference]: With dead ends: 12150 [2021-03-10 23:38:16,446 INFO L226 Difference]: Without dead ends: 12030 [2021-03-10 23:38:16,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 992.3ms TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:38:16,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12030 states. [2021-03-10 23:38:16,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12030 to 9327. [2021-03-10 23:38:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9327 states, 9326 states have (on average 3.69644006004718) internal successors, (34473), 9326 states have internal predecessors, (34473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9327 states to 9327 states and 34473 transitions. [2021-03-10 23:38:16,666 INFO L78 Accepts]: Start accepts. Automaton has 9327 states and 34473 transitions. Word has length 28 [2021-03-10 23:38:16,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:16,666 INFO L480 AbstractCegarLoop]: Abstraction has 9327 states and 34473 transitions. [2021-03-10 23:38:16,666 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) [2021-03-10 23:38:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 9327 states and 34473 transitions. [2021-03-10 23:38:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:16,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:16,680 INFO L519 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] [2021-03-10 23:38:16,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-03-10 23:38:16,881 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash -446866636, now seen corresponding path program 67 times [2021-03-10 23:38:16,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:16,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554078088] [2021-03-10 23:38:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:17,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554078088] [2021-03-10 23:38:17,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498385479] [2021-03-10 23:38:17,120 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 [2021-03-10 23:38:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:17,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:17,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:17,205 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 [2021-03-10 23:38:17,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:17,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:17,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:17,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-03-10 23:38:17,278 INFO L446 ElimStorePlain]: Different costs {0=[v_C_107], 1=[A]} [2021-03-10 23:38:17,281 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 [2021-03-10 23:38:17,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:17,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:17,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:17,292 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 36 treesize of output 24 [2021-03-10 23:38:17,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:17,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:17,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:17,298 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:23 [2021-03-10 23:38:17,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 23:38:17,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:17,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:17,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:17,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:38:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:17,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:17,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:38:17,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613585597] [2021-03-10 23:38:17,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:38:17,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:17,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:38:17,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:17,345 INFO L87 Difference]: Start difference. First operand 9327 states and 34473 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) [2021-03-10 23:38:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:17,651 INFO L93 Difference]: Finished difference Result 9425 states and 34731 transitions. [2021-03-10 23:38:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:38:17,651 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 [2021-03-10 23:38:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:17,669 INFO L225 Difference]: With dead ends: 9425 [2021-03-10 23:38:17,670 INFO L226 Difference]: Without dead ends: 9399 [2021-03-10 23:38:17,670 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9399 states. [2021-03-10 23:38:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9399 to 9318. [2021-03-10 23:38:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9318 states, 9317 states have (on average 3.6989374262101533) internal successors, (34463), 9317 states have internal predecessors, (34463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9318 states to 9318 states and 34463 transitions. [2021-03-10 23:38:17,796 INFO L78 Accepts]: Start accepts. Automaton has 9318 states and 34463 transitions. Word has length 28 [2021-03-10 23:38:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:17,796 INFO L480 AbstractCegarLoop]: Abstraction has 9318 states and 34463 transitions. [2021-03-10 23:38:17,796 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) [2021-03-10 23:38:17,796 INFO L276 IsEmpty]: Start isEmpty. Operand 9318 states and 34463 transitions. [2021-03-10 23:38:17,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:17,809 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:17,809 INFO L519 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] [2021-03-10 23:38:18,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:18,010 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:18,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1373198096, now seen corresponding path program 68 times [2021-03-10 23:38:18,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:18,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648250793] [2021-03-10 23:38:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:18,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648250793] [2021-03-10 23:38:18,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154790988] [2021-03-10 23:38:18,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:18,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:18,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:18,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:18,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:18,307 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 [2021-03-10 23:38:18,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:18,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:18,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:18,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-03-10 23:38:18,448 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_109], 2=[B]} [2021-03-10 23:38:18,450 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 [2021-03-10 23:38:18,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:18,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:18,459 INFO L518 ElimStorePlain]: Eliminatee v_C_109 vanished before elimination [2021-03-10 23:38:18,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:18,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:18,461 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 [2021-03-10 23:38:18,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:18,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:18,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:18,468 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:38:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:18,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:18,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:18,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732350752] [2021-03-10 23:38:18,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:18,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:18,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:18,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:18,486 INFO L87 Difference]: Start difference. First operand 9318 states and 34463 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) [2021-03-10 23:38:18,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:18,911 INFO L93 Difference]: Finished difference Result 11844 states and 43007 transitions. [2021-03-10 23:38:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:38:18,912 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 [2021-03-10 23:38:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:18,931 INFO L225 Difference]: With dead ends: 11844 [2021-03-10 23:38:18,932 INFO L226 Difference]: Without dead ends: 11781 [2021-03-10 23:38:18,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 417.6ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:38:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11781 states. [2021-03-10 23:38:19,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11781 to 9329. [2021-03-10 23:38:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9329 states, 9328 states have (on average 3.6972555746140654) internal successors, (34488), 9328 states have internal predecessors, (34488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9329 states to 9329 states and 34488 transitions. [2021-03-10 23:38:19,071 INFO L78 Accepts]: Start accepts. Automaton has 9329 states and 34488 transitions. Word has length 28 [2021-03-10 23:38:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:19,071 INFO L480 AbstractCegarLoop]: Abstraction has 9329 states and 34488 transitions. [2021-03-10 23:38:19,071 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) [2021-03-10 23:38:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 9329 states and 34488 transitions. [2021-03-10 23:38:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:19,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:19,086 INFO L519 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] [2021-03-10 23:38:19,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-03-10 23:38:19,286 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:19,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1504162452, now seen corresponding path program 69 times [2021-03-10 23:38:19,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:19,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742167126] [2021-03-10 23:38:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:19,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742167126] [2021-03-10 23:38:19,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609339004] [2021-03-10 23:38:19,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:19,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:38:19,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:19,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:19,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:19,605 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 [2021-03-10 23:38:19,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:19,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:19,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:19,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:38:19,698 INFO L446 ElimStorePlain]: Different costs {0=[v_C_111], 2=[B]} [2021-03-10 23:38:19,701 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 [2021-03-10 23:38:19,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:19,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:19,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:19,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:19,716 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 [2021-03-10 23:38:19,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:19,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:19,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:19,727 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-03-10 23:38:19,749 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 [2021-03-10 23:38:19,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:19,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:19,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:19,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:38:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:19,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:19,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:19,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526050406] [2021-03-10 23:38:19,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:19,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:19,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:19,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:19,778 INFO L87 Difference]: Start difference. First operand 9329 states and 34488 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) [2021-03-10 23:38:20,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:20,357 INFO L93 Difference]: Finished difference Result 11875 states and 43080 transitions. [2021-03-10 23:38:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:38:20,358 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 [2021-03-10 23:38:20,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:20,383 INFO L225 Difference]: With dead ends: 11875 [2021-03-10 23:38:20,383 INFO L226 Difference]: Without dead ends: 11836 [2021-03-10 23:38:20,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 451.4ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:38:20,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11836 states. [2021-03-10 23:38:20,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11836 to 9328. [2021-03-10 23:38:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 3.69818805618098) internal successors, (34493), 9327 states have internal predecessors, (34493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 34493 transitions. [2021-03-10 23:38:20,622 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 34493 transitions. Word has length 28 [2021-03-10 23:38:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:20,623 INFO L480 AbstractCegarLoop]: Abstraction has 9328 states and 34493 transitions. [2021-03-10 23:38:20,623 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) [2021-03-10 23:38:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 34493 transitions. [2021-03-10 23:38:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:20,638 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:20,638 INFO L519 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] [2021-03-10 23:38:20,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:20,839 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:20,839 INFO L82 PathProgramCache]: Analyzing trace with hash 970127540, now seen corresponding path program 70 times [2021-03-10 23:38:20,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:20,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718296997] [2021-03-10 23:38:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:21,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718296997] [2021-03-10 23:38:21,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56510361] [2021-03-10 23:38:21,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:21,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:21,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:21,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:21,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:21,097 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 18 treesize of output 17 [2021-03-10 23:38:21,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:21,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:21,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:21,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-03-10 23:38:21,147 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 [2021-03-10 23:38:21,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:21,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:21,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:21,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:40 [2021-03-10 23:38:21,189 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 [2021-03-10 23:38:21,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:21,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:21,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:21,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-03-10 23:38:21,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:21,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:21,233 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 [2021-03-10 23:38:21,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:21,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:21,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:21,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-03-10 23:38:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:21,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:21,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:21,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856559749] [2021-03-10 23:38:21,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:21,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:21,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:21,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:21,267 INFO L87 Difference]: Start difference. First operand 9328 states and 34493 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) [2021-03-10 23:38:21,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:21,612 INFO L93 Difference]: Finished difference Result 9479 states and 34940 transitions. [2021-03-10 23:38:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:38:21,613 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 [2021-03-10 23:38:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:21,631 INFO L225 Difference]: With dead ends: 9479 [2021-03-10 23:38:21,632 INFO L226 Difference]: Without dead ends: 9464 [2021-03-10 23:38:21,632 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 298.6ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:21,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9464 states. [2021-03-10 23:38:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9464 to 9343. [2021-03-10 23:38:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9343 states, 9342 states have (on average 3.69781631342325) internal successors, (34545), 9342 states have internal predecessors, (34545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9343 states to 9343 states and 34545 transitions. [2021-03-10 23:38:21,761 INFO L78 Accepts]: Start accepts. Automaton has 9343 states and 34545 transitions. Word has length 28 [2021-03-10 23:38:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:21,762 INFO L480 AbstractCegarLoop]: Abstraction has 9343 states and 34545 transitions. [2021-03-10 23:38:21,762 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) [2021-03-10 23:38:21,762 INFO L276 IsEmpty]: Start isEmpty. Operand 9343 states and 34545 transitions. [2021-03-10 23:38:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:21,776 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:21,776 INFO L519 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] [2021-03-10 23:38:21,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:21,978 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:21,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:21,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1957619152, now seen corresponding path program 71 times [2021-03-10 23:38:21,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:21,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209754565] [2021-03-10 23:38:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:22,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209754565] [2021-03-10 23:38:22,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756017569] [2021-03-10 23:38:22,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:22,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:38:22,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:22,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:22,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:22,258 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 [2021-03-10 23:38:22,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:22,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-03-10 23:38:22,307 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 [2021-03-10 23:38:22,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:22,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:40 [2021-03-10 23:38:22,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:22,359 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 [2021-03-10 23:38:22,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:22,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:29 [2021-03-10 23:38:22,391 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 [2021-03-10 23:38:22,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:22,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:38:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:22,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:22,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:22,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116972160] [2021-03-10 23:38:22,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:22,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:22,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:22,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:22,424 INFO L87 Difference]: Start difference. First operand 9343 states and 34545 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) [2021-03-10 23:38:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:22,743 INFO L93 Difference]: Finished difference Result 9492 states and 34963 transitions. [2021-03-10 23:38:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:38:22,743 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 [2021-03-10 23:38:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:22,762 INFO L225 Difference]: With dead ends: 9492 [2021-03-10 23:38:22,763 INFO L226 Difference]: Without dead ends: 9467 [2021-03-10 23:38:22,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9467 states. [2021-03-10 23:38:22,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9467 to 9346. [2021-03-10 23:38:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9346 states, 9345 states have (on average 3.6983413590155165) internal successors, (34561), 9345 states have internal predecessors, (34561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9346 states to 9346 states and 34561 transitions. [2021-03-10 23:38:22,892 INFO L78 Accepts]: Start accepts. Automaton has 9346 states and 34561 transitions. Word has length 28 [2021-03-10 23:38:22,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:22,892 INFO L480 AbstractCegarLoop]: Abstraction has 9346 states and 34561 transitions. [2021-03-10 23:38:22,892 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) [2021-03-10 23:38:22,892 INFO L276 IsEmpty]: Start isEmpty. Operand 9346 states and 34561 transitions. [2021-03-10 23:38:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:22,906 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:22,906 INFO L519 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] [2021-03-10 23:38:23,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:23,107 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1669716788, now seen corresponding path program 72 times [2021-03-10 23:38:23,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:23,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388671845] [2021-03-10 23:38:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:23,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388671845] [2021-03-10 23:38:23,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439272400] [2021-03-10 23:38:23,333 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) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:23,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:38:23,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:23,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:38:23,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:23,412 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 [2021-03-10 23:38:23,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:23,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:23,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:23,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-03-10 23:38:23,636 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_117], 2=[B]} [2021-03-10 23:38:23,638 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 [2021-03-10 23:38:23,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:23,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:23,652 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 [2021-03-10 23:38:23,653 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:38:23,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:23,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:23,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:23,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:38:23,672 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:38:23,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:23,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:23,684 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:19 [2021-03-10 23:38:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:23,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:23,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-10 23:38:23,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672886715] [2021-03-10 23:38:23,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:38:23,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:23,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:38:23,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:38:23,732 INFO L87 Difference]: Start difference. First operand 9346 states and 34561 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) [2021-03-10 23:38:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:25,591 INFO L93 Difference]: Finished difference Result 14595 states and 51670 transitions. [2021-03-10 23:38:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 23:38:25,592 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 [2021-03-10 23:38:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:25,617 INFO L225 Difference]: With dead ends: 14595 [2021-03-10 23:38:25,618 INFO L226 Difference]: Without dead ends: 14476 [2021-03-10 23:38:25,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1333.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:38:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14476 states. [2021-03-10 23:38:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14476 to 9537. [2021-03-10 23:38:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9537 states, 9536 states have (on average 3.700817953020134) internal successors, (35291), 9536 states have internal predecessors, (35291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9537 states to 9537 states and 35291 transitions. [2021-03-10 23:38:25,774 INFO L78 Accepts]: Start accepts. Automaton has 9537 states and 35291 transitions. Word has length 28 [2021-03-10 23:38:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:25,774 INFO L480 AbstractCegarLoop]: Abstraction has 9537 states and 35291 transitions. [2021-03-10 23:38:25,774 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) [2021-03-10 23:38:25,774 INFO L276 IsEmpty]: Start isEmpty. Operand 9537 states and 35291 transitions. [2021-03-10 23:38:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:25,787 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:25,787 INFO L519 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] [2021-03-10 23:38:25,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:25,988 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:25,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:25,988 INFO L82 PathProgramCache]: Analyzing trace with hash 389925388, now seen corresponding path program 73 times [2021-03-10 23:38:25,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:25,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393249732] [2021-03-10 23:38:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:26,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393249732] [2021-03-10 23:38:26,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088564467] [2021-03-10 23:38:26,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:26,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:26,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:26,277 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 [2021-03-10 23:38:26,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:26,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:26,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:26,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-03-10 23:38:26,372 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 [2021-03-10 23:38:26,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:26,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:26,379 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 28 treesize of output 20 [2021-03-10 23:38:26,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:26,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:26,381 INFO L518 ElimStorePlain]: Eliminatee v_C_119 vanished before elimination [2021-03-10 23:38:26,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:26,381 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-03-10 23:38:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:26,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:26,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:38:26,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997481123] [2021-03-10 23:38:26,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:38:26,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:26,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:38:26,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:26,407 INFO L87 Difference]: Start difference. First operand 9537 states and 35291 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:27,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:27,617 INFO L93 Difference]: Finished difference Result 15751 states and 55651 transitions. [2021-03-10 23:38:27,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:38:27,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:38:27,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:27,649 INFO L225 Difference]: With dead ends: 15751 [2021-03-10 23:38:27,649 INFO L226 Difference]: Without dead ends: 15682 [2021-03-10 23:38:27,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 914.5ms TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:38:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15682 states. [2021-03-10 23:38:27,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15682 to 9502. [2021-03-10 23:38:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 9501 states have (on average 3.7026628775918327) internal successors, (35179), 9501 states have internal predecessors, (35179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 35179 transitions. [2021-03-10 23:38:27,829 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 35179 transitions. Word has length 28 [2021-03-10 23:38:27,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:27,829 INFO L480 AbstractCegarLoop]: Abstraction has 9502 states and 35179 transitions. [2021-03-10 23:38:27,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 35179 transitions. [2021-03-10 23:38:27,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:27,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:27,843 INFO L519 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] [2021-03-10 23:38:28,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-03-10 23:38:28,044 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:28,044 INFO L82 PathProgramCache]: Analyzing trace with hash 298838404, now seen corresponding path program 74 times [2021-03-10 23:38:28,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:28,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224226885] [2021-03-10 23:38:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:28,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224226885] [2021-03-10 23:38:28,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403768301] [2021-03-10 23:38:28,234 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 [2021-03-10 23:38:28,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:28,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:28,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:28,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:28,384 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 [2021-03-10 23:38:28,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:28,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:28,399 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. [2021-03-10 23:38:28,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-03-10 23:38:28,463 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_121], 2=[B]} [2021-03-10 23:38:28,465 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 [2021-03-10 23:38:28,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:28,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:28,475 INFO L518 ElimStorePlain]: Eliminatee v_C_121 vanished before elimination [2021-03-10 23:38:28,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:28,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:28,477 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 [2021-03-10 23:38:28,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:28,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:28,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:28,484 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:38:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:28,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:28,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:28,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352344912] [2021-03-10 23:38:28,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:28,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:28,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:28,501 INFO L87 Difference]: Start difference. First operand 9502 states and 35179 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) [2021-03-10 23:38:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:29,291 INFO L93 Difference]: Finished difference Result 13366 states and 48167 transitions. [2021-03-10 23:38:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:38:29,292 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 [2021-03-10 23:38:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:29,318 INFO L225 Difference]: With dead ends: 13366 [2021-03-10 23:38:29,318 INFO L226 Difference]: Without dead ends: 13341 [2021-03-10 23:38:29,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 609.4ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:38:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-03-10 23:38:29,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 9466. [2021-03-10 23:38:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9466 states, 9465 states have (on average 3.704701531959852) internal successors, (35065), 9465 states have internal predecessors, (35065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9466 states to 9466 states and 35065 transitions. [2021-03-10 23:38:29,515 INFO L78 Accepts]: Start accepts. Automaton has 9466 states and 35065 transitions. Word has length 28 [2021-03-10 23:38:29,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:29,515 INFO L480 AbstractCegarLoop]: Abstraction has 9466 states and 35065 transitions. [2021-03-10 23:38:29,515 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) [2021-03-10 23:38:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 9466 states and 35065 transitions. [2021-03-10 23:38:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:29,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:29,530 INFO L519 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] [2021-03-10 23:38:29,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-03-10 23:38:29,735 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:29,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:29,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1034979504, now seen corresponding path program 75 times [2021-03-10 23:38:29,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:29,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902897710] [2021-03-10 23:38:29,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:29,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902897710] [2021-03-10 23:38:29,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995909891] [2021-03-10 23:38:29,924 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 [2021-03-10 23:38:29,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:38:29,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:29,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:38:29,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:30,183 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 [2021-03-10 23:38:30,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:30,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:30,199 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. [2021-03-10 23:38:30,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:49 [2021-03-10 23:38:30,282 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_123], 2=[B]} [2021-03-10 23:38:30,285 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 [2021-03-10 23:38:30,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:30,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:30,295 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 [2021-03-10 23:38:30,297 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:38:30,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:30,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:30,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:30,306 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 [2021-03-10 23:38:30,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:30,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:30,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:30,312 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:48, output treesize:5 [2021-03-10 23:38:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:30,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:30,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-10 23:38:30,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430186749] [2021-03-10 23:38:30,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:38:30,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:30,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:38:30,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:38:30,329 INFO L87 Difference]: Start difference. First operand 9466 states and 35065 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) [2021-03-10 23:38:31,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:31,640 INFO L93 Difference]: Finished difference Result 12275 states and 44511 transitions. [2021-03-10 23:38:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:38:31,641 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 [2021-03-10 23:38:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:31,666 INFO L225 Difference]: With dead ends: 12275 [2021-03-10 23:38:31,667 INFO L226 Difference]: Without dead ends: 12260 [2021-03-10 23:38:31,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 794.5ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:38:31,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12260 states. [2021-03-10 23:38:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12260 to 9502. [2021-03-10 23:38:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 9501 states have (on average 3.702031365119461) internal successors, (35173), 9501 states have internal predecessors, (35173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 35173 transitions. [2021-03-10 23:38:31,830 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 35173 transitions. Word has length 28 [2021-03-10 23:38:31,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:31,830 INFO L480 AbstractCegarLoop]: Abstraction has 9502 states and 35173 transitions. [2021-03-10 23:38:31,830 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) [2021-03-10 23:38:31,830 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 35173 transitions. [2021-03-10 23:38:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:31,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:31,846 INFO L519 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] [2021-03-10 23:38:32,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-03-10 23:38:32,047 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:32,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:32,047 INFO L82 PathProgramCache]: Analyzing trace with hash 267715028, now seen corresponding path program 76 times [2021-03-10 23:38:32,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:32,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685425138] [2021-03-10 23:38:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:32,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685425138] [2021-03-10 23:38:32,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519369016] [2021-03-10 23:38:32,265 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) [2021-03-10 23:38:32,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:32,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:32,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:32,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:32,408 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 [2021-03-10 23:38:32,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:32,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:32,425 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. [2021-03-10 23:38:32,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:64 [2021-03-10 23:38:32,522 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_125], 2=[B]} [2021-03-10 23:38:32,524 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 [2021-03-10 23:38:32,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:32,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:32,533 INFO L518 ElimStorePlain]: Eliminatee v_C_125 vanished before elimination [2021-03-10 23:38:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:32,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:32,536 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 [2021-03-10 23:38:32,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:32,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:32,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:32,543 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:38:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:32,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:32,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:32,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367240284] [2021-03-10 23:38:32,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:32,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:32,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:32,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:32,561 INFO L87 Difference]: Start difference. First operand 9502 states and 35173 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) [2021-03-10 23:38:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:33,063 INFO L93 Difference]: Finished difference Result 12165 states and 44191 transitions. [2021-03-10 23:38:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:38:33,064 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 [2021-03-10 23:38:33,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:33,088 INFO L225 Difference]: With dead ends: 12165 [2021-03-10 23:38:33,088 INFO L226 Difference]: Without dead ends: 12125 [2021-03-10 23:38:33,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:38:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12125 states. [2021-03-10 23:38:33,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12125 to 9516. [2021-03-10 23:38:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 9515 states have (on average 3.7014188124014713) internal successors, (35219), 9515 states have internal predecessors, (35219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 35219 transitions. [2021-03-10 23:38:33,235 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 35219 transitions. Word has length 28 [2021-03-10 23:38:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:33,235 INFO L480 AbstractCegarLoop]: Abstraction has 9516 states and 35219 transitions. [2021-03-10 23:38:33,235 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) [2021-03-10 23:38:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 35219 transitions. [2021-03-10 23:38:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:33,250 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:33,250 INFO L519 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] [2021-03-10 23:38:33,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-03-10 23:38:33,450 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:33,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1335589592, now seen corresponding path program 77 times [2021-03-10 23:38:33,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:33,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873560166] [2021-03-10 23:38:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:33,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873560166] [2021-03-10 23:38:33,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072968307] [2021-03-10 23:38:33,649 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:33,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:38:33,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:33,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:33,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:33,839 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 [2021-03-10 23:38:33,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:33,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:33,856 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. [2021-03-10 23:38:33,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:64 [2021-03-10 23:38:33,896 INFO L446 ElimStorePlain]: Different costs {0=[v_C_127], 2=[B]} [2021-03-10 23:38:33,898 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 [2021-03-10 23:38:33,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:33,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:33,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:33,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:33,914 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 [2021-03-10 23:38:33,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:33,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:33,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:33,925 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-03-10 23:38:33,946 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 [2021-03-10 23:38:33,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:33,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:33,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:33,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:38:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:33,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:33,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:33,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604755259] [2021-03-10 23:38:33,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:33,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:33,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:33,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:33,975 INFO L87 Difference]: Start difference. First operand 9516 states and 35219 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) [2021-03-10 23:38:34,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:34,535 INFO L93 Difference]: Finished difference Result 12232 states and 44418 transitions. [2021-03-10 23:38:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:38:34,535 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 [2021-03-10 23:38:34,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:34,559 INFO L225 Difference]: With dead ends: 12232 [2021-03-10 23:38:34,559 INFO L226 Difference]: Without dead ends: 12217 [2021-03-10 23:38:34,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 444.7ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:38:34,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12217 states. [2021-03-10 23:38:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12217 to 9502. [2021-03-10 23:38:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 9501 states have (on average 3.7041364066940323) internal successors, (35193), 9501 states have internal predecessors, (35193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 35193 transitions. [2021-03-10 23:38:34,707 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 35193 transitions. Word has length 28 [2021-03-10 23:38:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:34,708 INFO L480 AbstractCegarLoop]: Abstraction has 9502 states and 35193 transitions. [2021-03-10 23:38:34,708 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) [2021-03-10 23:38:34,708 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 35193 transitions. [2021-03-10 23:38:34,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:34,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:34,721 INFO L519 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] [2021-03-10 23:38:34,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:34,922 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:34,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:34,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1471768620, now seen corresponding path program 78 times [2021-03-10 23:38:34,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:34,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791577804] [2021-03-10 23:38:34,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:35,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791577804] [2021-03-10 23:38:35,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746996569] [2021-03-10 23:38:35,123 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 [2021-03-10 23:38:35,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:38:35,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:35,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:38:35,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:35,196 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 [2021-03-10 23:38:35,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:35,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:35,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:35,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-03-10 23:38:35,364 INFO L446 ElimStorePlain]: Different costs {0=[v_C_129], 2=[A, B]} [2021-03-10 23:38:35,368 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 [2021-03-10 23:38:35,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:35,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:35,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:35,396 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 [2021-03-10 23:38:35,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:38:35,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:35,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:35,434 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 [2021-03-10 23:38:35,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:38:35,500 INFO L628 ElimStorePlain]: treesize reduction 66, result has 41.1 percent of original size [2021-03-10 23:38:35,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:35,505 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:65, output treesize:87 [2021-03-10 23:38:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:35,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:35,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 23:38:35,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283449715] [2021-03-10 23:38:35,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:38:35,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:35,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:38:35,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:38:35,576 INFO L87 Difference]: Start difference. First operand 9502 states and 35193 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:36,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:36,396 INFO L93 Difference]: Finished difference Result 12270 states and 44506 transitions. [2021-03-10 23:38:36,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:38:36,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:38:36,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:36,417 INFO L225 Difference]: With dead ends: 12270 [2021-03-10 23:38:36,417 INFO L226 Difference]: Without dead ends: 12240 [2021-03-10 23:38:36,417 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 620.8ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:38:36,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12240 states. [2021-03-10 23:38:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12240 to 9532. [2021-03-10 23:38:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9532 states, 9531 states have (on average 3.7025495750708215) internal successors, (35289), 9531 states have internal predecessors, (35289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9532 states to 9532 states and 35289 transitions. [2021-03-10 23:38:36,556 INFO L78 Accepts]: Start accepts. Automaton has 9532 states and 35289 transitions. Word has length 28 [2021-03-10 23:38:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:36,556 INFO L480 AbstractCegarLoop]: Abstraction has 9532 states and 35289 transitions. [2021-03-10 23:38:36,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:36,557 INFO L276 IsEmpty]: Start isEmpty. Operand 9532 states and 35289 transitions. [2021-03-10 23:38:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:36,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:36,571 INFO L519 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] [2021-03-10 23:38:36,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-03-10 23:38:36,771 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:36,771 INFO L82 PathProgramCache]: Analyzing trace with hash 843404308, now seen corresponding path program 79 times [2021-03-10 23:38:36,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:36,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165059997] [2021-03-10 23:38:36,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:36,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165059997] [2021-03-10 23:38:36,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039934611] [2021-03-10 23:38:36,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:36,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:36,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:37,066 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 [2021-03-10 23:38:37,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:37,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:37,083 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. [2021-03-10 23:38:37,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:54 [2021-03-10 23:38:37,190 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_131], 2=[B]} [2021-03-10 23:38:37,193 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 [2021-03-10 23:38:37,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:37,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:37,204 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 [2021-03-10 23:38:37,206 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:38:37,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:37,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:37,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:37,216 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 [2021-03-10 23:38:37,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:37,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:37,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:37,223 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:38:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:37,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:37,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:37,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626491706] [2021-03-10 23:38:37,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:37,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:37,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:37,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:37,247 INFO L87 Difference]: Start difference. First operand 9532 states and 35289 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) [2021-03-10 23:38:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:37,859 INFO L93 Difference]: Finished difference Result 13352 states and 48230 transitions. [2021-03-10 23:38:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:38:37,860 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 [2021-03-10 23:38:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:37,887 INFO L225 Difference]: With dead ends: 13352 [2021-03-10 23:38:37,887 INFO L226 Difference]: Without dead ends: 13337 [2021-03-10 23:38:37,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 487.6ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:38:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13337 states. [2021-03-10 23:38:38,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13337 to 9532. [2021-03-10 23:38:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9532 states, 9531 states have (on average 3.7025495750708215) internal successors, (35289), 9531 states have internal predecessors, (35289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9532 states to 9532 states and 35289 transitions. [2021-03-10 23:38:38,072 INFO L78 Accepts]: Start accepts. Automaton has 9532 states and 35289 transitions. Word has length 28 [2021-03-10 23:38:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:38,073 INFO L480 AbstractCegarLoop]: Abstraction has 9532 states and 35289 transitions. [2021-03-10 23:38:38,073 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) [2021-03-10 23:38:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 9532 states and 35289 transitions. [2021-03-10 23:38:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:38,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:38,087 INFO L519 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] [2021-03-10 23:38:38,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:38,287 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:38,288 INFO L82 PathProgramCache]: Analyzing trace with hash -403894056, now seen corresponding path program 80 times [2021-03-10 23:38:38,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:38,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993503170] [2021-03-10 23:38:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:38,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993503170] [2021-03-10 23:38:38,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032207451] [2021-03-10 23:38:38,491 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 [2021-03-10 23:38:38,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:38,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:38,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:38,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:38,580 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 [2021-03-10 23:38:38,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:38,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:38,596 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. [2021-03-10 23:38:38,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:54 [2021-03-10 23:38:38,670 INFO L446 ElimStorePlain]: Different costs {0=[v_C_133], 2=[B]} [2021-03-10 23:38:38,672 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 [2021-03-10 23:38:38,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:38,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:38,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:38,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:38,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:38:38,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:38,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:38,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:38,698 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-03-10 23:38:38,720 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 [2021-03-10 23:38:38,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:38,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:38,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:38,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:38:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:38,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:38,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:38,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801285968] [2021-03-10 23:38:38,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:38,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:38,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:38,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:38,749 INFO L87 Difference]: Start difference. First operand 9532 states and 35289 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) [2021-03-10 23:38:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:39,223 INFO L93 Difference]: Finished difference Result 12299 states and 44633 transitions. [2021-03-10 23:38:39,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:38:39,224 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 [2021-03-10 23:38:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:39,252 INFO L225 Difference]: With dead ends: 12299 [2021-03-10 23:38:39,252 INFO L226 Difference]: Without dead ends: 12277 [2021-03-10 23:38:39,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 414.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:38:39,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12277 states. [2021-03-10 23:38:39,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12277 to 9539. [2021-03-10 23:38:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9539 states, 9538 states have (on average 3.7029775634304887) internal successors, (35319), 9538 states have internal predecessors, (35319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9539 states to 9539 states and 35319 transitions. [2021-03-10 23:38:39,426 INFO L78 Accepts]: Start accepts. Automaton has 9539 states and 35319 transitions. Word has length 28 [2021-03-10 23:38:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:39,426 INFO L480 AbstractCegarLoop]: Abstraction has 9539 states and 35319 transitions. [2021-03-10 23:38:39,426 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) [2021-03-10 23:38:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 9539 states and 35319 transitions. [2021-03-10 23:38:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:39,443 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:39,443 INFO L519 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] [2021-03-10 23:38:39,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:39,644 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:39,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:39,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2061160488, now seen corresponding path program 81 times [2021-03-10 23:38:39,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:39,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283470137] [2021-03-10 23:38:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:39,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283470137] [2021-03-10 23:38:39,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411861883] [2021-03-10 23:38:39,857 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 [2021-03-10 23:38:39,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:38:39,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:39,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:38:39,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:39,954 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 [2021-03-10 23:38:39,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:39,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:39,972 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. [2021-03-10 23:38:39,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:70 [2021-03-10 23:38:40,015 INFO L446 ElimStorePlain]: Different costs {0=[v_C_135], 2=[B]} [2021-03-10 23:38:40,018 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 24 treesize of output 20 [2021-03-10 23:38:40,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:40,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:40,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:40,035 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 22 [2021-03-10 23:38:40,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:40,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:40,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:40,051 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:62, output treesize:27 [2021-03-10 23:38:40,097 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 [2021-03-10 23:38:40,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:40,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:40,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:40,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:38:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:40,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:40,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:40,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590019933] [2021-03-10 23:38:40,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:40,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:40,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:40,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:40,127 INFO L87 Difference]: Start difference. First operand 9539 states and 35319 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) [2021-03-10 23:38:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:40,647 INFO L93 Difference]: Finished difference Result 12319 states and 44718 transitions. [2021-03-10 23:38:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:38:40,648 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 [2021-03-10 23:38:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:40,675 INFO L225 Difference]: With dead ends: 12319 [2021-03-10 23:38:40,675 INFO L226 Difference]: Without dead ends: 12304 [2021-03-10 23:38:40,676 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 430.1ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:38:40,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12304 states. [2021-03-10 23:38:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12304 to 9563. [2021-03-10 23:38:40,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9563 states, 9562 states have (on average 3.7018406191173394) internal successors, (35397), 9562 states have internal predecessors, (35397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9563 states to 9563 states and 35397 transitions. [2021-03-10 23:38:40,848 INFO L78 Accepts]: Start accepts. Automaton has 9563 states and 35397 transitions. Word has length 28 [2021-03-10 23:38:40,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:40,848 INFO L480 AbstractCegarLoop]: Abstraction has 9563 states and 35397 transitions. [2021-03-10 23:38:40,848 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) [2021-03-10 23:38:40,848 INFO L276 IsEmpty]: Start isEmpty. Operand 9563 states and 35397 transitions. [2021-03-10 23:38:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:40,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:40,865 INFO L519 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] [2021-03-10 23:38:41,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:41,065 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:41,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2103940680, now seen corresponding path program 82 times [2021-03-10 23:38:41,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:41,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598143089] [2021-03-10 23:38:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:41,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598143089] [2021-03-10 23:38:41,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391981950] [2021-03-10 23:38:41,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:41,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:41,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:41,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:41,376 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 [2021-03-10 23:38:41,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:41,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:41,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:41,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-03-10 23:38:41,515 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 [2021-03-10 23:38:41,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:41,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:41,521 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 [2021-03-10 23:38:41,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:41,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:41,523 INFO L518 ElimStorePlain]: Eliminatee v_C_137 vanished before elimination [2021-03-10 23:38:41,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:41,524 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-03-10 23:38:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:41,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:41,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:38:41,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608735959] [2021-03-10 23:38:41,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:38:41,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:41,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:38:41,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:41,542 INFO L87 Difference]: Start difference. First operand 9563 states and 35397 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) [2021-03-10 23:38:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:42,484 INFO L93 Difference]: Finished difference Result 12275 states and 44565 transitions. [2021-03-10 23:38:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:38:42,484 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 [2021-03-10 23:38:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:42,508 INFO L225 Difference]: With dead ends: 12275 [2021-03-10 23:38:42,509 INFO L226 Difference]: Without dead ends: 12233 [2021-03-10 23:38:42,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 730.2ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:38:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12233 states. [2021-03-10 23:38:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12233 to 9588. [2021-03-10 23:38:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9588 states, 9587 states have (on average 3.700427662459581) internal successors, (35476), 9587 states have internal predecessors, (35476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:42,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9588 states to 9588 states and 35476 transitions. [2021-03-10 23:38:42,662 INFO L78 Accepts]: Start accepts. Automaton has 9588 states and 35476 transitions. Word has length 28 [2021-03-10 23:38:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:42,662 INFO L480 AbstractCegarLoop]: Abstraction has 9588 states and 35476 transitions. [2021-03-10 23:38:42,662 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) [2021-03-10 23:38:42,662 INFO L276 IsEmpty]: Start isEmpty. Operand 9588 states and 35476 transitions. [2021-03-10 23:38:42,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:42,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:42,676 INFO L519 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] [2021-03-10 23:38:42,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-03-10 23:38:42,877 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:42,877 INFO L82 PathProgramCache]: Analyzing trace with hash 162628600, now seen corresponding path program 83 times [2021-03-10 23:38:42,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:42,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274186589] [2021-03-10 23:38:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:43,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274186589] [2021-03-10 23:38:43,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469260634] [2021-03-10 23:38:43,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:43,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:38:43,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:43,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:43,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:43,173 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 [2021-03-10 23:38:43,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:43,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:43,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:43,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-03-10 23:38:43,272 INFO L446 ElimStorePlain]: Different costs {0=[v_C_139], 1=[A]} [2021-03-10 23:38:43,275 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 [2021-03-10 23:38:43,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:43,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:43,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:43,286 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 [2021-03-10 23:38:43,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:43,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:43,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:43,293 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:23 [2021-03-10 23:38:43,315 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 [2021-03-10 23:38:43,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:43,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:43,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:43,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:38:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:43,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:43,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:38:43,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815727596] [2021-03-10 23:38:43,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:38:43,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:43,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:38:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:43,341 INFO L87 Difference]: Start difference. First operand 9588 states and 35476 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) [2021-03-10 23:38:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:43,670 INFO L93 Difference]: Finished difference Result 9721 states and 35869 transitions. [2021-03-10 23:38:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:38:43,670 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 [2021-03-10 23:38:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:43,688 INFO L225 Difference]: With dead ends: 9721 [2021-03-10 23:38:43,689 INFO L226 Difference]: Without dead ends: 9706 [2021-03-10 23:38:43,689 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:38:43,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9706 states. [2021-03-10 23:38:43,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9706 to 9576. [2021-03-10 23:38:43,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9576 states, 9575 states have (on average 3.7017232375979114) internal successors, (35444), 9575 states have internal predecessors, (35444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 35444 transitions. [2021-03-10 23:38:43,822 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 35444 transitions. Word has length 28 [2021-03-10 23:38:43,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:43,822 INFO L480 AbstractCegarLoop]: Abstraction has 9576 states and 35444 transitions. [2021-03-10 23:38:43,822 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) [2021-03-10 23:38:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 35444 transitions. [2021-03-10 23:38:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:43,837 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:43,837 INFO L519 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] [2021-03-10 23:38:44,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-03-10 23:38:44,037 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:44,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:44,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1982693332, now seen corresponding path program 84 times [2021-03-10 23:38:44,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:44,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994022016] [2021-03-10 23:38:44,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:44,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994022016] [2021-03-10 23:38:44,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675332555] [2021-03-10 23:38:44,320 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 [2021-03-10 23:38:44,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:38:44,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:44,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:38:44,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:44,373 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 [2021-03-10 23:38:44,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:44,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:44,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:44,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-03-10 23:38:44,645 INFO L446 ElimStorePlain]: Different costs {0=[v_C_141], 2=[A], 3=[B]} [2021-03-10 23:38:44,648 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 [2021-03-10 23:38:44,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:44,681 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.4 percent of original size [2021-03-10 23:38:44,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:44,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2021-03-10 23:38:44,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:38:44,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:44,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:44,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:44,738 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 [2021-03-10 23:38:44,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-03-10 23:38:44,833 INFO L628 ElimStorePlain]: treesize reduction 135, result has 27.4 percent of original size [2021-03-10 23:38:44,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:44,843 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:73, output treesize:70 [2021-03-10 23:38:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:44,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:44,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-03-10 23:38:44,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512799914] [2021-03-10 23:38:44,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:38:44,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:38:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:38:44,927 INFO L87 Difference]: Start difference. First operand 9576 states and 35444 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) [2021-03-10 23:38:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:46,378 INFO L93 Difference]: Finished difference Result 12387 states and 44799 transitions. [2021-03-10 23:38:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:38:46,379 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 [2021-03-10 23:38:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:46,405 INFO L225 Difference]: With dead ends: 12387 [2021-03-10 23:38:46,405 INFO L226 Difference]: Without dead ends: 12258 [2021-03-10 23:38:46,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1070.7ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:38:46,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12258 states. [2021-03-10 23:38:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12258 to 9617. [2021-03-10 23:38:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9617 states, 9616 states have (on average 3.697691347753744) internal successors, (35557), 9616 states have internal predecessors, (35557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9617 states to 9617 states and 35557 transitions. [2021-03-10 23:38:46,620 INFO L78 Accepts]: Start accepts. Automaton has 9617 states and 35557 transitions. Word has length 28 [2021-03-10 23:38:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:46,620 INFO L480 AbstractCegarLoop]: Abstraction has 9617 states and 35557 transitions. [2021-03-10 23:38:46,621 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) [2021-03-10 23:38:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 9617 states and 35557 transitions. [2021-03-10 23:38:46,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:46,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:46,635 INFO L519 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] [2021-03-10 23:38:46,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-03-10 23:38:46,835 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:46,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1821506156, now seen corresponding path program 85 times [2021-03-10 23:38:46,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:46,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439280748] [2021-03-10 23:38:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:47,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439280748] [2021-03-10 23:38:47,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018044666] [2021-03-10 23:38:47,130 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 [2021-03-10 23:38:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:47,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:47,181 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 [2021-03-10 23:38:47,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:47,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:47,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:47,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-03-10 23:38:47,335 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_143], 2=[B]} [2021-03-10 23:38:47,337 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 [2021-03-10 23:38:47,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:47,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:47,346 INFO L518 ElimStorePlain]: Eliminatee v_C_143 vanished before elimination [2021-03-10 23:38:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:47,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:47,349 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 [2021-03-10 23:38:47,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:47,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:47,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:47,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-03-10 23:38:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:47,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:47,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:47,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997544710] [2021-03-10 23:38:47,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:47,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:47,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:47,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:47,380 INFO L87 Difference]: Start difference. First operand 9617 states and 35557 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) [2021-03-10 23:38:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:48,123 INFO L93 Difference]: Finished difference Result 13419 states and 48400 transitions. [2021-03-10 23:38:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:38:48,123 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 [2021-03-10 23:38:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:48,150 INFO L225 Difference]: With dead ends: 13419 [2021-03-10 23:38:48,151 INFO L226 Difference]: Without dead ends: 13351 [2021-03-10 23:38:48,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 677.6ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:38:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13351 states. [2021-03-10 23:38:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13351 to 9599. [2021-03-10 23:38:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9599 states, 9598 states have (on average 3.69920816836841) internal successors, (35505), 9598 states have internal predecessors, (35505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9599 states to 9599 states and 35505 transitions. [2021-03-10 23:38:48,305 INFO L78 Accepts]: Start accepts. Automaton has 9599 states and 35505 transitions. Word has length 28 [2021-03-10 23:38:48,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:48,305 INFO L480 AbstractCegarLoop]: Abstraction has 9599 states and 35505 transitions. [2021-03-10 23:38:48,305 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) [2021-03-10 23:38:48,305 INFO L276 IsEmpty]: Start isEmpty. Operand 9599 states and 35505 transitions. [2021-03-10 23:38:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:48,320 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:48,320 INFO L519 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] [2021-03-10 23:38:48,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:48,521 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2113657688, now seen corresponding path program 86 times [2021-03-10 23:38:48,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:48,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462371891] [2021-03-10 23:38:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:48,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462371891] [2021-03-10 23:38:48,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183762158] [2021-03-10 23:38:48,794 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 [2021-03-10 23:38:48,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:48,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:48,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:48,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:48,853 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 [2021-03-10 23:38:48,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:48,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:48,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:48,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-03-10 23:38:48,992 INFO L446 ElimStorePlain]: Different costs {0=[v_C_145], 2=[B]} [2021-03-10 23:38:48,995 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 [2021-03-10 23:38:48,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:49,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:49,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:49,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:49,011 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 [2021-03-10 23:38:49,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:49,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:49,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:49,022 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-03-10 23:38:49,044 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 30 treesize of output 18 [2021-03-10 23:38:49,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:49,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:49,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:49,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:38:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:49,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:49,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:49,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394602031] [2021-03-10 23:38:49,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:49,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:49,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:49,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:49,090 INFO L87 Difference]: Start difference. First operand 9599 states and 35505 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) [2021-03-10 23:38:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:49,653 INFO L93 Difference]: Finished difference Result 12296 states and 44606 transitions. [2021-03-10 23:38:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:38:49,654 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 [2021-03-10 23:38:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:49,678 INFO L225 Difference]: With dead ends: 12296 [2021-03-10 23:38:49,678 INFO L226 Difference]: Without dead ends: 12257 [2021-03-10 23:38:49,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 532.3ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:38:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12257 states. [2021-03-10 23:38:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12257 to 9594. [2021-03-10 23:38:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9594 states, 9593 states have (on average 3.700406546440113) internal successors, (35498), 9593 states have internal predecessors, (35498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9594 states to 9594 states and 35498 transitions. [2021-03-10 23:38:49,828 INFO L78 Accepts]: Start accepts. Automaton has 9594 states and 35498 transitions. Word has length 28 [2021-03-10 23:38:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:49,828 INFO L480 AbstractCegarLoop]: Abstraction has 9594 states and 35498 transitions. [2021-03-10 23:38:49,828 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) [2021-03-10 23:38:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 9594 states and 35498 transitions. [2021-03-10 23:38:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:49,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:49,842 INFO L519 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] [2021-03-10 23:38:50,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:50,043 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:50,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1579622776, now seen corresponding path program 87 times [2021-03-10 23:38:50,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:50,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802855977] [2021-03-10 23:38:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:50,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802855977] [2021-03-10 23:38:50,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644638928] [2021-03-10 23:38:50,284 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 [2021-03-10 23:38:50,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:38:50,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:50,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:38:50,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:50,342 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 [2021-03-10 23:38:50,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:50,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:50,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:50,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-03-10 23:38:50,458 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 [2021-03-10 23:38:50,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:50,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:50,478 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. [2021-03-10 23:38:50,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:63 [2021-03-10 23:38:50,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:50,532 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 [2021-03-10 23:38:50,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:38:50,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:50,576 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. [2021-03-10 23:38:50,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:82 [2021-03-10 23:38:50,797 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 23:38:50,963 INFO L446 ElimStorePlain]: Different costs {1=[B], 3=[v_prenex_14, v_prenex_12]} [2021-03-10 23:38:50,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:50,968 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 [2021-03-10 23:38:50,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:51,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:51,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:51,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:51,025 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 [2021-03-10 23:38:51,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:38:51,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:51,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:51,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:51,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 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 [2021-03-10 23:38:51,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 23:38:51,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:51,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:38:51,146 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:143, output treesize:127 [2021-03-10 23:38:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:51,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:51,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 23:38:51,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395869344] [2021-03-10 23:38:51,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:38:51,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:51,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:38:51,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:38:51,275 INFO L87 Difference]: Start difference. First operand 9594 states and 35498 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:52,172 INFO L93 Difference]: Finished difference Result 9696 states and 35766 transitions. [2021-03-10 23:38:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:38:52,172 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 [2021-03-10 23:38:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:52,191 INFO L225 Difference]: With dead ends: 9696 [2021-03-10 23:38:52,192 INFO L226 Difference]: Without dead ends: 9674 [2021-03-10 23:38:52,192 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1019.1ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:38:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9674 states. [2021-03-10 23:38:52,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9674 to 9611. [2021-03-10 23:38:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9611 states, 9610 states have (on average 3.6994797086368365) internal successors, (35552), 9610 states have internal predecessors, (35552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9611 states to 9611 states and 35552 transitions. [2021-03-10 23:38:52,327 INFO L78 Accepts]: Start accepts. Automaton has 9611 states and 35552 transitions. Word has length 28 [2021-03-10 23:38:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:52,327 INFO L480 AbstractCegarLoop]: Abstraction has 9611 states and 35552 transitions. [2021-03-10 23:38:52,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 9611 states and 35552 transitions. [2021-03-10 23:38:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:52,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:52,342 INFO L519 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] [2021-03-10 23:38:52,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:52,543 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:52,543 INFO L82 PathProgramCache]: Analyzing trace with hash -37910004, now seen corresponding path program 88 times [2021-03-10 23:38:52,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:52,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490998643] [2021-03-10 23:38:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:52,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490998643] [2021-03-10 23:38:52,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455583766] [2021-03-10 23:38:52,802 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 [2021-03-10 23:38:52,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:52,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:52,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:52,859 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 [2021-03-10 23:38:52,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:52,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:52,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:52,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-03-10 23:38:52,944 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 [2021-03-10 23:38:52,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:52,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:52,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:52,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:40 [2021-03-10 23:38:52,987 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 [2021-03-10 23:38:52,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:52,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:52,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:52,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-03-10 23:38:53,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:53,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:53,029 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 [2021-03-10 23:38:53,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:53,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:53,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:53,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-03-10 23:38:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:53,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:53,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:53,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869393208] [2021-03-10 23:38:53,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:53,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:53,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:53,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:53,065 INFO L87 Difference]: Start difference. First operand 9611 states and 35552 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) [2021-03-10 23:38:53,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:53,514 INFO L93 Difference]: Finished difference Result 9793 states and 36059 transitions. [2021-03-10 23:38:53,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:38:53,515 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 [2021-03-10 23:38:53,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:53,533 INFO L225 Difference]: With dead ends: 9793 [2021-03-10 23:38:53,534 INFO L226 Difference]: Without dead ends: 9771 [2021-03-10 23:38:53,534 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:53,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9771 states. [2021-03-10 23:38:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9771 to 9609. [2021-03-10 23:38:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9609 states, 9608 states have (on average 3.7000416319733556) internal successors, (35550), 9608 states have internal predecessors, (35550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9609 states to 9609 states and 35550 transitions. [2021-03-10 23:38:53,665 INFO L78 Accepts]: Start accepts. Automaton has 9609 states and 35550 transitions. Word has length 28 [2021-03-10 23:38:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:53,665 INFO L480 AbstractCegarLoop]: Abstraction has 9609 states and 35550 transitions. [2021-03-10 23:38:53,665 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) [2021-03-10 23:38:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 9609 states and 35550 transitions. [2021-03-10 23:38:53,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:53,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:53,681 INFO L519 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] [2021-03-10 23:38:53,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:53,881 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:53,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:53,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1727852908, now seen corresponding path program 89 times [2021-03-10 23:38:53,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:53,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194976557] [2021-03-10 23:38:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:54,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194976557] [2021-03-10 23:38:54,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253694187] [2021-03-10 23:38:54,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:54,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:38:54,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:54,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:54,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:54,186 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 [2021-03-10 23:38:54,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:54,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:54,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:54,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-03-10 23:38:54,268 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 [2021-03-10 23:38:54,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:54,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:54,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:54,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:40 [2021-03-10 23:38:54,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:54,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:54,316 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 [2021-03-10 23:38:54,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:54,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:54,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:54,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:29 [2021-03-10 23:38:54,350 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 [2021-03-10 23:38:54,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:54,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:54,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:54,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:38:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:54,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:54,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:54,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087289756] [2021-03-10 23:38:54,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:54,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:54,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:54,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:54,383 INFO L87 Difference]: Start difference. First operand 9609 states and 35550 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) [2021-03-10 23:38:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:54,855 INFO L93 Difference]: Finished difference Result 9755 states and 35943 transitions. [2021-03-10 23:38:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:38:54,856 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 [2021-03-10 23:38:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:54,873 INFO L225 Difference]: With dead ends: 9755 [2021-03-10 23:38:54,873 INFO L226 Difference]: Without dead ends: 9718 [2021-03-10 23:38:54,873 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:38:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9718 states. [2021-03-10 23:38:54,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9718 to 9608. [2021-03-10 23:38:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9608 states, 9607 states have (on average 3.7012594982825022) internal successors, (35558), 9607 states have internal predecessors, (35558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9608 states to 9608 states and 35558 transitions. [2021-03-10 23:38:55,080 INFO L78 Accepts]: Start accepts. Automaton has 9608 states and 35558 transitions. Word has length 28 [2021-03-10 23:38:55,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:55,080 INFO L480 AbstractCegarLoop]: Abstraction has 9608 states and 35558 transitions. [2021-03-10 23:38:55,080 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) [2021-03-10 23:38:55,081 INFO L276 IsEmpty]: Start isEmpty. Operand 9608 states and 35558 transitions. [2021-03-10 23:38:55,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:55,096 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:55,096 INFO L519 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] [2021-03-10 23:38:55,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:55,299 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:55,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1624520208, now seen corresponding path program 90 times [2021-03-10 23:38:55,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:55,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011422703] [2021-03-10 23:38:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:55,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011422703] [2021-03-10 23:38:55,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729070271] [2021-03-10 23:38:55,546 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 [2021-03-10 23:38:55,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:38:55,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:55,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:38:55,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:55,619 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 [2021-03-10 23:38:55,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:55,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:55,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:55,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-03-10 23:38:55,861 INFO L446 ElimStorePlain]: Different costs {0=[v_C_153], 2=[A], 3=[B]} [2021-03-10 23:38:55,865 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 [2021-03-10 23:38:55,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:55,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:55,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:55,901 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 [2021-03-10 23:38:55,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:38:55,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:55,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:55,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:55,956 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 [2021-03-10 23:38:55,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-03-10 23:38:56,056 INFO L628 ElimStorePlain]: treesize reduction 96, result has 33.8 percent of original size [2021-03-10 23:38:56,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:56,061 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:68, output treesize:49 [2021-03-10 23:38:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:56,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:56,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 23:38:56,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902508347] [2021-03-10 23:38:56,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:38:56,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:56,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:38:56,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:38:56,115 INFO L87 Difference]: Start difference. First operand 9608 states and 35558 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) [2021-03-10 23:38:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:57,375 INFO L93 Difference]: Finished difference Result 12441 states and 45084 transitions. [2021-03-10 23:38:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:38:57,376 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 [2021-03-10 23:38:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:57,401 INFO L225 Difference]: With dead ends: 12441 [2021-03-10 23:38:57,401 INFO L226 Difference]: Without dead ends: 12378 [2021-03-10 23:38:57,401 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 854.8ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:38:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12378 states. [2021-03-10 23:38:57,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12378 to 9634. [2021-03-10 23:38:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9634 states, 9633 states have (on average 3.6997819993771413) internal successors, (35640), 9633 states have internal predecessors, (35640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9634 states to 9634 states and 35640 transitions. [2021-03-10 23:38:57,546 INFO L78 Accepts]: Start accepts. Automaton has 9634 states and 35640 transitions. Word has length 28 [2021-03-10 23:38:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:57,547 INFO L480 AbstractCegarLoop]: Abstraction has 9634 states and 35640 transitions. [2021-03-10 23:38:57,547 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) [2021-03-10 23:38:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 9634 states and 35640 transitions. [2021-03-10 23:38:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:57,561 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:57,561 INFO L519 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] [2021-03-10 23:38:57,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:57,762 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:57,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1755484564, now seen corresponding path program 91 times [2021-03-10 23:38:57,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:57,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450384845] [2021-03-10 23:38:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:58,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450384845] [2021-03-10 23:38:58,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869817074] [2021-03-10 23:38:58,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:58,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:58,055 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 [2021-03-10 23:38:58,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:58,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:58,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:58,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-03-10 23:38:58,189 INFO L446 ElimStorePlain]: Different costs {0=[v_C_155], 2=[B]} [2021-03-10 23:38:58,192 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 [2021-03-10 23:38:58,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:58,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:58,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:58,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:58,209 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 [2021-03-10 23:38:58,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:58,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:58,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:58,220 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-03-10 23:38:58,243 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 [2021-03-10 23:38:58,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:58,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:58,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:58,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:38:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:58,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:58,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:58,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688142745] [2021-03-10 23:38:58,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:58,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:58,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:58,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:58,273 INFO L87 Difference]: Start difference. First operand 9634 states and 35640 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) [2021-03-10 23:38:58,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:58,948 INFO L93 Difference]: Finished difference Result 12368 states and 44856 transitions. [2021-03-10 23:38:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:38:58,949 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 [2021-03-10 23:38:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:58,973 INFO L225 Difference]: With dead ends: 12368 [2021-03-10 23:38:58,974 INFO L226 Difference]: Without dead ends: 12337 [2021-03-10 23:38:58,974 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:38:58,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12337 states. [2021-03-10 23:38:59,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12337 to 9629. [2021-03-10 23:38:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9629 states, 9628 states have (on average 3.7011840465309516) internal successors, (35635), 9628 states have internal predecessors, (35635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9629 states to 9629 states and 35635 transitions. [2021-03-10 23:38:59,147 INFO L78 Accepts]: Start accepts. Automaton has 9629 states and 35635 transitions. Word has length 28 [2021-03-10 23:38:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:59,147 INFO L480 AbstractCegarLoop]: Abstraction has 9629 states and 35635 transitions. [2021-03-10 23:38:59,147 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) [2021-03-10 23:38:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 9629 states and 35635 transitions. [2021-03-10 23:38:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:38:59,164 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:59,165 INFO L519 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] [2021-03-10 23:38:59,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-03-10 23:38:59,365 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:59,365 INFO L82 PathProgramCache]: Analyzing trace with hash -194926700, now seen corresponding path program 92 times [2021-03-10 23:38:59,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:59,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401722601] [2021-03-10 23:38:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:59,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401722601] [2021-03-10 23:38:59,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033500281] [2021-03-10 23:38:59,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:59,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:59,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:59,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:38:59,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:59,735 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 [2021-03-10 23:38:59,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:59,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:59,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:59,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-03-10 23:38:59,845 INFO L446 ElimStorePlain]: Different costs {0=[v_C_157], 2=[B]} [2021-03-10 23:38:59,848 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 [2021-03-10 23:38:59,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:59,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:59,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:59,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:59,869 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 [2021-03-10 23:38:59,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:59,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:59,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:59,884 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:27 [2021-03-10 23:38:59,938 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 [2021-03-10 23:38:59,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:59,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:59,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:59,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:38:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:59,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:59,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:38:59,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50926477] [2021-03-10 23:38:59,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:38:59,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:59,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:38:59,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:38:59,975 INFO L87 Difference]: Start difference. First operand 9629 states and 35635 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) [2021-03-10 23:39:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:00,660 INFO L93 Difference]: Finished difference Result 12389 states and 44943 transitions. [2021-03-10 23:39:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:39:00,661 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 [2021-03-10 23:39:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:00,688 INFO L225 Difference]: With dead ends: 12389 [2021-03-10 23:39:00,688 INFO L226 Difference]: Without dead ends: 12361 [2021-03-10 23:39:00,688 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 561.7ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:39:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12361 states. [2021-03-10 23:39:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12361 to 9641. [2021-03-10 23:39:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9641 states, 9640 states have (on average 3.7007261410788383) internal successors, (35675), 9640 states have internal predecessors, (35675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9641 states to 9641 states and 35675 transitions. [2021-03-10 23:39:00,837 INFO L78 Accepts]: Start accepts. Automaton has 9641 states and 35675 transitions. Word has length 28 [2021-03-10 23:39:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:00,838 INFO L480 AbstractCegarLoop]: Abstraction has 9641 states and 35675 transitions. [2021-03-10 23:39:00,838 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) [2021-03-10 23:39:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9641 states and 35675 transitions. [2021-03-10 23:39:00,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:00,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:00,853 INFO L519 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] [2021-03-10 23:39:01,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-03-10 23:39:01,053 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:01,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:01,054 INFO L82 PathProgramCache]: Analyzing trace with hash 604414584, now seen corresponding path program 93 times [2021-03-10 23:39:01,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:01,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963012797] [2021-03-10 23:39:01,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:01,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963012797] [2021-03-10 23:39:01,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192835752] [2021-03-10 23:39:01,287 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 [2021-03-10 23:39:01,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:39:01,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:39:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:01,345 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 [2021-03-10 23:39:01,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:01,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:01,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:01,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-03-10 23:39:01,434 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 [2021-03-10 23:39:01,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:01,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:01,454 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. [2021-03-10 23:39:01,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:59 [2021-03-10 23:39:01,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:01,556 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 [2021-03-10 23:39:01,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:39:01,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:01,593 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. [2021-03-10 23:39:01,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:82 [2021-03-10 23:39:01,837 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:39:01,936 INFO L446 ElimStorePlain]: Different costs {1=[B], 3=[v_prenex_19, v_prenex_21]} [2021-03-10 23:39:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:01,941 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 [2021-03-10 23:39:01,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:01,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:01,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:01,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:02,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:02,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 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 [2021-03-10 23:39:02,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:39:02,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:02,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:02,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:02,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:39:02,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-03-10 23:39:02,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:02,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:39:02,123 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:143, output treesize:127 [2021-03-10 23:39:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:02,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:02,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 23:39:02,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608717665] [2021-03-10 23:39:02,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:39:02,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:02,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:39:02,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:39:02,256 INFO L87 Difference]: Start difference. First operand 9641 states and 35675 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:03,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:03,310 INFO L93 Difference]: Finished difference Result 9750 states and 35980 transitions. [2021-03-10 23:39:03,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:39:03,311 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 [2021-03-10 23:39:03,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:03,332 INFO L225 Difference]: With dead ends: 9750 [2021-03-10 23:39:03,332 INFO L226 Difference]: Without dead ends: 9735 [2021-03-10 23:39:03,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 984.2ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:39:03,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9735 states. [2021-03-10 23:39:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9735 to 9660. [2021-03-10 23:39:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9660 states, 9659 states have (on average 3.6996583497256443) internal successors, (35735), 9659 states have internal predecessors, (35735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9660 states to 9660 states and 35735 transitions. [2021-03-10 23:39:03,468 INFO L78 Accepts]: Start accepts. Automaton has 9660 states and 35735 transitions. Word has length 28 [2021-03-10 23:39:03,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:03,468 INFO L480 AbstractCegarLoop]: Abstraction has 9660 states and 35735 transitions. [2021-03-10 23:39:03,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 9660 states and 35735 transitions. [2021-03-10 23:39:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:03,484 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:03,484 INFO L519 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] [2021-03-10 23:39:03,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:03,685 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:03,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:03,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1013118196, now seen corresponding path program 94 times [2021-03-10 23:39:03,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:03,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951129794] [2021-03-10 23:39:03,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:03,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951129794] [2021-03-10 23:39:03,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734523822] [2021-03-10 23:39:03,924 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 [2021-03-10 23:39:03,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:39:03,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:03,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:03,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:03,977 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 [2021-03-10 23:39:03,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:03,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:03,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:03,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-03-10 23:39:04,031 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 [2021-03-10 23:39:04,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:04,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:04,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:04,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:46 [2021-03-10 23:39:04,107 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 25 treesize of output 17 [2021-03-10 23:39:04,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:04,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:04,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:04,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-03-10 23:39:04,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:04,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:04,151 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 [2021-03-10 23:39:04,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:04,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:04,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:04,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-03-10 23:39:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:04,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:04,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:39:04,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714303868] [2021-03-10 23:39:04,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:39:04,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:04,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:39:04,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:39:04,188 INFO L87 Difference]: Start difference. First operand 9660 states and 35735 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) [2021-03-10 23:39:04,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:04,871 INFO L93 Difference]: Finished difference Result 9859 states and 36317 transitions. [2021-03-10 23:39:04,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:39:04,872 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 [2021-03-10 23:39:04,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:04,893 INFO L225 Difference]: With dead ends: 9859 [2021-03-10 23:39:04,893 INFO L226 Difference]: Without dead ends: 9844 [2021-03-10 23:39:04,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9844 states. [2021-03-10 23:39:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9844 to 9665. [2021-03-10 23:39:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9665 states, 9664 states have (on average 3.698985927152318) internal successors, (35747), 9664 states have internal predecessors, (35747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9665 states to 9665 states and 35747 transitions. [2021-03-10 23:39:05,033 INFO L78 Accepts]: Start accepts. Automaton has 9665 states and 35747 transitions. Word has length 28 [2021-03-10 23:39:05,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:05,033 INFO L480 AbstractCegarLoop]: Abstraction has 9665 states and 35747 transitions. [2021-03-10 23:39:05,033 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) [2021-03-10 23:39:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 9665 states and 35747 transitions. [2021-03-10 23:39:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:05,048 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:05,048 INFO L519 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] [2021-03-10 23:39:05,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-03-10 23:39:05,249 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:05,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1591906196, now seen corresponding path program 95 times [2021-03-10 23:39:05,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:05,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185479292] [2021-03-10 23:39:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:05,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185479292] [2021-03-10 23:39:05,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233819162] [2021-03-10 23:39:05,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:05,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:39:05,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:05,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:05,535 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 18 treesize of output 17 [2021-03-10 23:39:05,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:05,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:05,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:05,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-03-10 23:39:05,589 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 [2021-03-10 23:39:05,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:05,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:05,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:05,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:46 [2021-03-10 23:39:05,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:05,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:05,665 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 [2021-03-10 23:39:05,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:05,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:05,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:05,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:29 [2021-03-10 23:39:05,700 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 30 treesize of output 18 [2021-03-10 23:39:05,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:05,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:05,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:05,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:39:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:05,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:05,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:39:05,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133666951] [2021-03-10 23:39:05,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:39:05,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:05,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:39:05,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:39:05,734 INFO L87 Difference]: Start difference. First operand 9665 states and 35747 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) [2021-03-10 23:39:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:06,233 INFO L93 Difference]: Finished difference Result 9811 states and 36156 transitions. [2021-03-10 23:39:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:39:06,233 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 [2021-03-10 23:39:06,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:06,253 INFO L225 Difference]: With dead ends: 9811 [2021-03-10 23:39:06,253 INFO L226 Difference]: Without dead ends: 9786 [2021-03-10 23:39:06,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 403.9ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:06,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9786 states. [2021-03-10 23:39:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9786 to 9660. [2021-03-10 23:39:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9660 states, 9659 states have (on average 3.700486592814991) internal successors, (35743), 9659 states have internal predecessors, (35743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9660 states to 9660 states and 35743 transitions. [2021-03-10 23:39:06,383 INFO L78 Accepts]: Start accepts. Automaton has 9660 states and 35743 transitions. Word has length 28 [2021-03-10 23:39:06,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:06,383 INFO L480 AbstractCegarLoop]: Abstraction has 9660 states and 35743 transitions. [2021-03-10 23:39:06,383 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) [2021-03-10 23:39:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 9660 states and 35743 transitions. [2021-03-10 23:39:06,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:06,397 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:06,398 INFO L519 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] [2021-03-10 23:39:06,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-03-10 23:39:06,598 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:06,598 INFO L82 PathProgramCache]: Analyzing trace with hash -218520368, now seen corresponding path program 96 times [2021-03-10 23:39:06,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:06,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307718617] [2021-03-10 23:39:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:06,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307718617] [2021-03-10 23:39:06,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556952909] [2021-03-10 23:39:06,844 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 [2021-03-10 23:39:06,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:39:06,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:06,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:06,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:06,898 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 12 treesize of output 11 [2021-03-10 23:39:06,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:06,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:06,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:06,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-03-10 23:39:06,950 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 [2021-03-10 23:39:06,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:06,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:06,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:06,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:46 [2021-03-10 23:39:06,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:06,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:06,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-03-10 23:39:07,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:07,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:07,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:07,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:31 [2021-03-10 23:39:07,058 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 [2021-03-10 23:39:07,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:07,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:07,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:07,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-03-10 23:39:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:07,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:07,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 23:39:07,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046491660] [2021-03-10 23:39:07,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:39:07,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:39:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:39:07,093 INFO L87 Difference]: Start difference. First operand 9660 states and 35743 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) [2021-03-10 23:39:07,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:07,556 INFO L93 Difference]: Finished difference Result 9813 states and 36196 transitions. [2021-03-10 23:39:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:39:07,557 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 [2021-03-10 23:39:07,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:07,574 INFO L225 Difference]: With dead ends: 9813 [2021-03-10 23:39:07,574 INFO L226 Difference]: Without dead ends: 9798 [2021-03-10 23:39:07,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:39:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2021-03-10 23:39:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 9668. [2021-03-10 23:39:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9668 states, 9667 states have (on average 3.7009413468501084) internal successors, (35777), 9667 states have internal predecessors, (35777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9668 states to 9668 states and 35777 transitions. [2021-03-10 23:39:07,695 INFO L78 Accepts]: Start accepts. Automaton has 9668 states and 35777 transitions. Word has length 28 [2021-03-10 23:39:07,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:07,695 INFO L480 AbstractCegarLoop]: Abstraction has 9668 states and 35777 transitions. [2021-03-10 23:39:07,695 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) [2021-03-10 23:39:07,695 INFO L276 IsEmpty]: Start isEmpty. Operand 9668 states and 35777 transitions. [2021-03-10 23:39:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:07,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:07,709 INFO L519 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] [2021-03-10 23:39:07,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:07,911 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:07,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:07,911 INFO L82 PathProgramCache]: Analyzing trace with hash 618524472, now seen corresponding path program 97 times [2021-03-10 23:39:07,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:07,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192050587] [2021-03-10 23:39:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:08,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192050587] [2021-03-10 23:39:08,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962747499] [2021-03-10 23:39:08,088 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 [2021-03-10 23:39:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:08,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:08,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:08,146 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 [2021-03-10 23:39:08,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:08,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:08,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:08,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:39:08,325 INFO L446 ElimStorePlain]: Different costs {0=[v_C_167], 6=[A, B]} [2021-03-10 23:39:08,327 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 [2021-03-10 23:39:08,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:08,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:08,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,339 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 [2021-03-10 23:39:08,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:08,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:08,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,348 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 [2021-03-10 23:39:08,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:08,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:08,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:08,353 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:167, output treesize:9 [2021-03-10 23:39:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:08,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:08,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:08,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336357800] [2021-03-10 23:39:08,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:08,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:08,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:08,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:08,372 INFO L87 Difference]: Start difference. First operand 9668 states and 35777 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) [2021-03-10 23:39:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:09,774 INFO L93 Difference]: Finished difference Result 11096 states and 39830 transitions. [2021-03-10 23:39:09,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:39:09,775 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 [2021-03-10 23:39:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:09,798 INFO L225 Difference]: With dead ends: 11096 [2021-03-10 23:39:09,798 INFO L226 Difference]: Without dead ends: 11081 [2021-03-10 23:39:09,799 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1032.1ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:39:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11081 states. [2021-03-10 23:39:09,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11081 to 9743. [2021-03-10 23:39:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9743 states, 9742 states have (on average 3.698008622459454) internal successors, (36026), 9742 states have internal predecessors, (36026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:09,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9743 states to 9743 states and 36026 transitions. [2021-03-10 23:39:09,953 INFO L78 Accepts]: Start accepts. Automaton has 9743 states and 36026 transitions. Word has length 28 [2021-03-10 23:39:09,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:09,953 INFO L480 AbstractCegarLoop]: Abstraction has 9743 states and 36026 transitions. [2021-03-10 23:39:09,953 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) [2021-03-10 23:39:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 9743 states and 36026 transitions. [2021-03-10 23:39:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:09,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:09,968 INFO L519 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] [2021-03-10 23:39:10,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-03-10 23:39:10,169 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:10,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:10,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1409873544, now seen corresponding path program 98 times [2021-03-10 23:39:10,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:10,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551444829] [2021-03-10 23:39:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:10,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551444829] [2021-03-10 23:39:10,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638436656] [2021-03-10 23:39:10,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:10,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:39:10,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:10,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:39:10,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:10,428 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 [2021-03-10 23:39:10,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:10,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:10,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:10,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:10,616 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 [2021-03-10 23:39:10,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:10,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:10,626 INFO L518 ElimStorePlain]: Eliminatee v_C_169 vanished before elimination [2021-03-10 23:39:10,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:10,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-03-10 23:39:10,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:10,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-03-10 23:39:10,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:39:10,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:10,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:10,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-03-10 23:39:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:10,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:10,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 23:39:10,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795012373] [2021-03-10 23:39:10,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:39:10,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:10,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:39:10,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:39:10,824 INFO L87 Difference]: Start difference. First operand 9743 states and 36026 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) [2021-03-10 23:39:11,325 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-10 23:39:12,232 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-10 23:39:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:13,961 INFO L93 Difference]: Finished difference Result 11411 states and 40701 transitions. [2021-03-10 23:39:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:39:13,962 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 [2021-03-10 23:39:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:13,986 INFO L225 Difference]: With dead ends: 11411 [2021-03-10 23:39:13,987 INFO L226 Difference]: Without dead ends: 11327 [2021-03-10 23:39:13,987 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2454.1ms TimeCoverageRelationStatistics Valid=379, Invalid=2591, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:39:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11327 states. [2021-03-10 23:39:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11327 to 9737. [2021-03-10 23:39:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9737 states, 9736 states have (on average 3.698644207066557) internal successors, (36010), 9736 states have internal predecessors, (36010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9737 states to 9737 states and 36010 transitions. [2021-03-10 23:39:14,181 INFO L78 Accepts]: Start accepts. Automaton has 9737 states and 36010 transitions. Word has length 28 [2021-03-10 23:39:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:14,181 INFO L480 AbstractCegarLoop]: Abstraction has 9737 states and 36010 transitions. [2021-03-10 23:39:14,181 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) [2021-03-10 23:39:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 9737 states and 36010 transitions. [2021-03-10 23:39:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:14,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:14,197 INFO L519 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] [2021-03-10 23:39:14,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:14,397 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash -744166792, now seen corresponding path program 99 times [2021-03-10 23:39:14,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:14,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873544980] [2021-03-10 23:39:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:14,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873544980] [2021-03-10 23:39:14,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643073868] [2021-03-10 23:39:14,580 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 [2021-03-10 23:39:14,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:39:14,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:14,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:39:14,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:14,648 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 [2021-03-10 23:39:14,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:14,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:14,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:14,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:39:14,758 INFO L446 ElimStorePlain]: Different costs {0=[v_C_171], 1=[A]} [2021-03-10 23:39:14,761 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 29 treesize of output 25 [2021-03-10 23:39:14,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:14,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:14,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:14,771 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 [2021-03-10 23:39:14,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:14,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:14,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:14,778 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:19 [2021-03-10 23:39:14,826 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 [2021-03-10 23:39:14,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:14,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:14,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:14,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:39:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:14,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:14,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:14,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912028315] [2021-03-10 23:39:14,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:14,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:14,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:14,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:14,854 INFO L87 Difference]: Start difference. First operand 9737 states and 36010 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:16,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:16,134 INFO L93 Difference]: Finished difference Result 11008 states and 39675 transitions. [2021-03-10 23:39:16,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:39:16,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:39:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:16,155 INFO L225 Difference]: With dead ends: 11008 [2021-03-10 23:39:16,155 INFO L226 Difference]: Without dead ends: 10978 [2021-03-10 23:39:16,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 992.4ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:39:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10978 states. [2021-03-10 23:39:16,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10978 to 9760. [2021-03-10 23:39:16,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9760 states, 9759 states have (on average 3.6985346859309356) internal successors, (36094), 9759 states have internal predecessors, (36094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9760 states to 9760 states and 36094 transitions. [2021-03-10 23:39:16,300 INFO L78 Accepts]: Start accepts. Automaton has 9760 states and 36094 transitions. Word has length 28 [2021-03-10 23:39:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:16,300 INFO L480 AbstractCegarLoop]: Abstraction has 9760 states and 36094 transitions. [2021-03-10 23:39:16,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:16,300 INFO L276 IsEmpty]: Start isEmpty. Operand 9760 states and 36094 transitions. [2021-03-10 23:39:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:16,316 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:16,316 INFO L519 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] [2021-03-10 23:39:16,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-03-10 23:39:16,532 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:16,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2021265836, now seen corresponding path program 100 times [2021-03-10 23:39:16,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:16,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146897553] [2021-03-10 23:39:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:16,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146897553] [2021-03-10 23:39:16,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497110458] [2021-03-10 23:39:16,741 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 [2021-03-10 23:39:16,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:39:16,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:16,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:16,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:16,799 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 [2021-03-10 23:39:16,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:16,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:16,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:16,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:16,980 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 [2021-03-10 23:39:16,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:16,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:16,986 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 [2021-03-10 23:39:16,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:16,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:16,989 INFO L518 ElimStorePlain]: Eliminatee v_C_173 vanished before elimination [2021-03-10 23:39:16,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:16,990 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-03-10 23:39:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:17,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:17,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:17,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132221256] [2021-03-10 23:39:17,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:17,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:17,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:17,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:17,008 INFO L87 Difference]: Start difference. First operand 9760 states and 36094 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) [2021-03-10 23:39:18,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:18,104 INFO L93 Difference]: Finished difference Result 11651 states and 41503 transitions. [2021-03-10 23:39:18,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:39:18,105 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 [2021-03-10 23:39:18,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:18,127 INFO L225 Difference]: With dead ends: 11651 [2021-03-10 23:39:18,128 INFO L226 Difference]: Without dead ends: 11626 [2021-03-10 23:39:18,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 782.9ms TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:39:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11626 states. [2021-03-10 23:39:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11626 to 9786. [2021-03-10 23:39:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9786 states, 9785 states have (on average 3.6973939703628003) internal successors, (36179), 9785 states have internal predecessors, (36179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9786 states to 9786 states and 36179 transitions. [2021-03-10 23:39:18,273 INFO L78 Accepts]: Start accepts. Automaton has 9786 states and 36179 transitions. Word has length 28 [2021-03-10 23:39:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:18,274 INFO L480 AbstractCegarLoop]: Abstraction has 9786 states and 36179 transitions. [2021-03-10 23:39:18,274 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) [2021-03-10 23:39:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 9786 states and 36179 transitions. [2021-03-10 23:39:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:18,289 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:18,289 INFO L519 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] [2021-03-10 23:39:18,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-03-10 23:39:18,489 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:18,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:18,490 INFO L82 PathProgramCache]: Analyzing trace with hash 245303444, now seen corresponding path program 101 times [2021-03-10 23:39:18,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:18,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153878173] [2021-03-10 23:39:18,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:18,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153878173] [2021-03-10 23:39:18,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448089464] [2021-03-10 23:39:18,699 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 [2021-03-10 23:39:18,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:39:18,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:18,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:18,814 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 [2021-03-10 23:39:18,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:18,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:18,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:18,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:39:18,956 INFO L446 ElimStorePlain]: Different costs {0=[v_C_175], 1=[A]} [2021-03-10 23:39:18,959 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 [2021-03-10 23:39:18,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:18,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:18,970 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 [2021-03-10 23:39:18,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:18,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:18,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:18,978 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:27 [2021-03-10 23:39:19,003 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 [2021-03-10 23:39:19,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:19,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:19,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:19,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:39:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:19,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:19,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:19,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102685346] [2021-03-10 23:39:19,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:19,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:19,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:19,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:19,030 INFO L87 Difference]: Start difference. First operand 9786 states and 36179 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:19,601 INFO L93 Difference]: Finished difference Result 11424 states and 40985 transitions. [2021-03-10 23:39:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:39:19,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:39:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:19,624 INFO L225 Difference]: With dead ends: 11424 [2021-03-10 23:39:19,624 INFO L226 Difference]: Without dead ends: 11354 [2021-03-10 23:39:19,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:39:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11354 states. [2021-03-10 23:39:19,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11354 to 9777. [2021-03-10 23:39:19,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9777 states, 9776 states have (on average 3.6988543371522096) internal successors, (36160), 9776 states have internal predecessors, (36160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9777 states to 9777 states and 36160 transitions. [2021-03-10 23:39:19,772 INFO L78 Accepts]: Start accepts. Automaton has 9777 states and 36160 transitions. Word has length 28 [2021-03-10 23:39:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:19,772 INFO L480 AbstractCegarLoop]: Abstraction has 9777 states and 36160 transitions. [2021-03-10 23:39:19,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 9777 states and 36160 transitions. [2021-03-10 23:39:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:19,788 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:19,788 INFO L519 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] [2021-03-10 23:39:19,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-03-10 23:39:19,988 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:19,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:19,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1181237460, now seen corresponding path program 102 times [2021-03-10 23:39:19,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:19,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57831759] [2021-03-10 23:39:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:20,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57831759] [2021-03-10 23:39:20,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491537886] [2021-03-10 23:39:20,176 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 [2021-03-10 23:39:20,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:39:20,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:20,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:20,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:20,235 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 [2021-03-10 23:39:20,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:20,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:20,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:20,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:39:20,422 INFO L446 ElimStorePlain]: Different costs {0=[v_C_177], 6=[A, B]} [2021-03-10 23:39:20,424 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 [2021-03-10 23:39:20,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:20,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:20,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:20,438 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 [2021-03-10 23:39:20,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:20,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:20,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:20,447 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 [2021-03-10 23:39:20,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:20,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:20,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:20,452 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:167, output treesize:8 [2021-03-10 23:39:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:20,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:20,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:20,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459669362] [2021-03-10 23:39:20,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:20,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:20,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:20,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:20,472 INFO L87 Difference]: Start difference. First operand 9777 states and 36160 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) [2021-03-10 23:39:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:21,128 INFO L93 Difference]: Finished difference Result 10573 states and 38435 transitions. [2021-03-10 23:39:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:39:21,128 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 [2021-03-10 23:39:21,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:21,151 INFO L225 Difference]: With dead ends: 10573 [2021-03-10 23:39:21,152 INFO L226 Difference]: Without dead ends: 10558 [2021-03-10 23:39:21,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 413.2ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:39:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10558 states. [2021-03-10 23:39:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10558 to 9792. [2021-03-10 23:39:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9792 states, 9791 states have (on average 3.698498621182719) internal successors, (36212), 9791 states have internal predecessors, (36212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9792 states to 9792 states and 36212 transitions. [2021-03-10 23:39:21,299 INFO L78 Accepts]: Start accepts. Automaton has 9792 states and 36212 transitions. Word has length 28 [2021-03-10 23:39:21,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:21,299 INFO L480 AbstractCegarLoop]: Abstraction has 9792 states and 36212 transitions. [2021-03-10 23:39:21,299 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) [2021-03-10 23:39:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 9792 states and 36212 transitions. [2021-03-10 23:39:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:21,315 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:21,315 INFO L519 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] [2021-03-10 23:39:21,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-03-10 23:39:21,515 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1312201816, now seen corresponding path program 103 times [2021-03-10 23:39:21,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:21,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740553873] [2021-03-10 23:39:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:21,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740553873] [2021-03-10 23:39:21,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858459151] [2021-03-10 23:39:21,719 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 [2021-03-10 23:39:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:21,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:21,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:21,778 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 [2021-03-10 23:39:21,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:21,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:21,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:21,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:21,921 INFO L446 ElimStorePlain]: Different costs {0=[v_C_179], 1=[B]} [2021-03-10 23:39:21,924 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 [2021-03-10 23:39:21,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:21,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:21,939 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 43 treesize of output 31 [2021-03-10 23:39:21,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:21,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:21,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:21,951 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:27 [2021-03-10 23:39:21,978 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 [2021-03-10 23:39:21,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:21,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:21,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:21,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:39:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:22,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:22,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:22,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355203406] [2021-03-10 23:39:22,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:22,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:22,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:22,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:22,007 INFO L87 Difference]: Start difference. First operand 9792 states and 36212 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) [2021-03-10 23:39:22,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:22,685 INFO L93 Difference]: Finished difference Result 11012 states and 39662 transitions. [2021-03-10 23:39:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:39:22,686 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 [2021-03-10 23:39:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:22,710 INFO L225 Difference]: With dead ends: 11012 [2021-03-10 23:39:22,710 INFO L226 Difference]: Without dead ends: 10975 [2021-03-10 23:39:22,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 503.5ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:39:22,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10975 states. [2021-03-10 23:39:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10975 to 9815. [2021-03-10 23:39:22,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9815 states, 9814 states have (on average 3.6996127980436113) internal successors, (36308), 9814 states have internal predecessors, (36308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:22,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9815 states to 9815 states and 36308 transitions. [2021-03-10 23:39:22,866 INFO L78 Accepts]: Start accepts. Automaton has 9815 states and 36308 transitions. Word has length 28 [2021-03-10 23:39:22,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:22,866 INFO L480 AbstractCegarLoop]: Abstraction has 9815 states and 36308 transitions. [2021-03-10 23:39:22,866 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) [2021-03-10 23:39:22,867 INFO L276 IsEmpty]: Start isEmpty. Operand 9815 states and 36308 transitions. [2021-03-10 23:39:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:22,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:22,883 INFO L519 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] [2021-03-10 23:39:23,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:23,083 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:23,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:23,084 INFO L82 PathProgramCache]: Analyzing trace with hash 778166904, now seen corresponding path program 104 times [2021-03-10 23:39:23,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:23,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792371426] [2021-03-10 23:39:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:23,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792371426] [2021-03-10 23:39:23,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210026493] [2021-03-10 23:39:23,364 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 [2021-03-10 23:39:23,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:39:23,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:23,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:39:23,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:23,461 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 [2021-03-10 23:39:23,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:23,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:23,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:23,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:39:23,603 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 [2021-03-10 23:39:23,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:23,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:23,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:23,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:54 [2021-03-10 23:39:23,651 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 [2021-03-10 23:39:23,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:23,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:23,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:23,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:22 [2021-03-10 23:39:23,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:23,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-03-10 23:39:23,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:39:23,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:23,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:23,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:53 [2021-03-10 23:39:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:23,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:23,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 23:39:23,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392432922] [2021-03-10 23:39:23,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:39:23,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:23,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:39:23,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:39:23,787 INFO L87 Difference]: Start difference. First operand 9815 states and 36308 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-03-10 23:39:24,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:24,849 INFO L93 Difference]: Finished difference Result 12703 states and 45948 transitions. [2021-03-10 23:39:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:39:24,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 28 [2021-03-10 23:39:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:24,878 INFO L225 Difference]: With dead ends: 12703 [2021-03-10 23:39:24,878 INFO L226 Difference]: Without dead ends: 12584 [2021-03-10 23:39:24,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 883.9ms TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:39:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12584 states. [2021-03-10 23:39:25,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12584 to 9850. [2021-03-10 23:39:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9850 states, 9849 states have (on average 3.6959082140318813) internal successors, (36401), 9849 states have internal predecessors, (36401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9850 states to 9850 states and 36401 transitions. [2021-03-10 23:39:25,039 INFO L78 Accepts]: Start accepts. Automaton has 9850 states and 36401 transitions. Word has length 28 [2021-03-10 23:39:25,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:25,039 INFO L480 AbstractCegarLoop]: Abstraction has 9850 states and 36401 transitions. [2021-03-10 23:39:25,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-03-10 23:39:25,040 INFO L276 IsEmpty]: Start isEmpty. Operand 9850 states and 36401 transitions. [2021-03-10 23:39:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:25,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:25,056 INFO L519 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] [2021-03-10 23:39:25,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:25,256 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:25,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1765658516, now seen corresponding path program 105 times [2021-03-10 23:39:25,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:25,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297108451] [2021-03-10 23:39:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:25,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297108451] [2021-03-10 23:39:25,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712806657] [2021-03-10 23:39:25,467 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 [2021-03-10 23:39:25,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:39:25,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:25,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:39:25,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:25,526 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 [2021-03-10 23:39:25,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:25,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:25,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:25,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:25,673 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 [2021-03-10 23:39:25,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:25,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:25,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:25,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:35 [2021-03-10 23:39:25,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:25,731 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 [2021-03-10 23:39:25,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:39:25,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:25,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:25,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:103 [2021-03-10 23:39:25,834 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 [2021-03-10 23:39:25,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:25,839 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 [2021-03-10 23:39:25,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:25,844 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 [2021-03-10 23:39:25,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:25,848 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 [2021-03-10 23:39:25,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:25,903 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.8 percent of original size [2021-03-10 23:39:25,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 23:39:25,904 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:99, output treesize:55 [2021-03-10 23:39:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:26,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:26,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 23:39:26,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035146060] [2021-03-10 23:39:26,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:39:26,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:26,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:39:26,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:39:26,024 INFO L87 Difference]: Start difference. First operand 9850 states and 36401 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-03-10 23:39:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:27,374 INFO L93 Difference]: Finished difference Result 12705 states and 46002 transitions. [2021-03-10 23:39:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:39:27,375 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 28 [2021-03-10 23:39:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:27,401 INFO L225 Difference]: With dead ends: 12705 [2021-03-10 23:39:27,402 INFO L226 Difference]: Without dead ends: 12674 [2021-03-10 23:39:27,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1158.8ms TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:39:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12674 states. [2021-03-10 23:39:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12674 to 9847. [2021-03-10 23:39:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9847 states, 9846 states have (on average 3.697339020922202) internal successors, (36404), 9846 states have internal predecessors, (36404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9847 states to 9847 states and 36404 transitions. [2021-03-10 23:39:27,551 INFO L78 Accepts]: Start accepts. Automaton has 9847 states and 36404 transitions. Word has length 28 [2021-03-10 23:39:27,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:27,551 INFO L480 AbstractCegarLoop]: Abstraction has 9847 states and 36404 transitions. [2021-03-10 23:39:27,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-03-10 23:39:27,551 INFO L276 IsEmpty]: Start isEmpty. Operand 9847 states and 36404 transitions. [2021-03-10 23:39:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:27,566 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:27,566 INFO L519 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] [2021-03-10 23:39:27,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-03-10 23:39:27,766 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:27,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:27,766 INFO L82 PathProgramCache]: Analyzing trace with hash -517396488, now seen corresponding path program 106 times [2021-03-10 23:39:27,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:27,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801215506] [2021-03-10 23:39:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:27,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801215506] [2021-03-10 23:39:27,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838638875] [2021-03-10 23:39:27,948 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 [2021-03-10 23:39:27,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:39:27,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:27,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:27,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:28,078 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 [2021-03-10 23:39:28,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:28,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:28,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:28,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:28,161 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 [2021-03-10 23:39:28,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:28,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:28,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:28,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:47 [2021-03-10 23:39:28,204 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 [2021-03-10 23:39:28,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:28,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:28,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:28,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:17 [2021-03-10 23:39:28,266 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 [2021-03-10 23:39:28,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:28,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:28,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:28,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 23:39:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:28,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:28,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:28,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132258898] [2021-03-10 23:39:28,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:28,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:28,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:28,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:28,294 INFO L87 Difference]: Start difference. First operand 9847 states and 36404 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:29,092 INFO L93 Difference]: Finished difference Result 12659 states and 45900 transitions. [2021-03-10 23:39:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:39:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:39:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:29,118 INFO L225 Difference]: With dead ends: 12659 [2021-03-10 23:39:29,118 INFO L226 Difference]: Without dead ends: 12637 [2021-03-10 23:39:29,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 589.9ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:39:29,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12637 states. [2021-03-10 23:39:29,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12637 to 9863. [2021-03-10 23:39:29,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9863 states, 9862 states have (on average 3.69701886027175) internal successors, (36460), 9862 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) [2021-03-10 23:39:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9863 states to 9863 states and 36460 transitions. [2021-03-10 23:39:29,277 INFO L78 Accepts]: Start accepts. Automaton has 9863 states and 36460 transitions. Word has length 28 [2021-03-10 23:39:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:29,277 INFO L480 AbstractCegarLoop]: Abstraction has 9863 states and 36460 transitions. [2021-03-10 23:39:29,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 9863 states and 36460 transitions. [2021-03-10 23:39:29,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:29,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:29,293 INFO L519 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] [2021-03-10 23:39:29,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:29,495 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:29,495 INFO L82 PathProgramCache]: Analyzing trace with hash -725729772, now seen corresponding path program 107 times [2021-03-10 23:39:29,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:29,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861354597] [2021-03-10 23:39:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:29,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861354597] [2021-03-10 23:39:29,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743509592] [2021-03-10 23:39:29,675 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:29,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:39:29,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:29,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:29,735 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 [2021-03-10 23:39:29,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:29,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:29,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:29,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:29,815 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 [2021-03-10 23:39:29,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:29,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:29,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:29,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2021-03-10 23:39:29,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:29,884 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 [2021-03-10 23:39:29,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:29,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:29,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:29,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-03-10 23:39:29,925 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 [2021-03-10 23:39:29,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:29,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:29,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:29,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:39:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:29,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:29,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:29,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519158852] [2021-03-10 23:39:29,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:29,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:29,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:29,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:29,954 INFO L87 Difference]: Start difference. First operand 9863 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) [2021-03-10 23:39:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:30,600 INFO L93 Difference]: Finished difference Result 12632 states and 45812 transitions. [2021-03-10 23:39:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:39:30,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:39:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:30,626 INFO L225 Difference]: With dead ends: 12632 [2021-03-10 23:39:30,626 INFO L226 Difference]: Without dead ends: 12595 [2021-03-10 23:39:30,626 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 500.3ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:39:30,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12595 states. [2021-03-10 23:39:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12595 to 9878. [2021-03-10 23:39:30,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9878 states, 9877 states have (on average 3.696466538422598) internal successors, (36510), 9877 states have internal predecessors, (36510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9878 states to 9878 states and 36510 transitions. [2021-03-10 23:39:30,772 INFO L78 Accepts]: Start accepts. Automaton has 9878 states and 36510 transitions. Word has length 28 [2021-03-10 23:39:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:30,772 INFO L480 AbstractCegarLoop]: Abstraction has 9878 states and 36510 transitions. [2021-03-10 23:39:30,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 9878 states and 36510 transitions. [2021-03-10 23:39:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:30,786 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:30,786 INFO L519 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] [2021-03-10 23:39:30,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-03-10 23:39:30,995 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:30,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1427320980, now seen corresponding path program 108 times [2021-03-10 23:39:30,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:30,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700569134] [2021-03-10 23:39:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:31,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700569134] [2021-03-10 23:39:31,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828729575] [2021-03-10 23:39:31,184 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 [2021-03-10 23:39:31,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:39:31,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:31,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:39:31,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:31,248 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 18 treesize of output 17 [2021-03-10 23:39:31,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:31,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:31,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:31,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:39:31,363 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 29 treesize of output 25 [2021-03-10 23:39:31,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:31,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:31,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:31,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:42 [2021-03-10 23:39:31,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:31,488 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 [2021-03-10 23:39:31,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:39:31,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:31,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:31,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:108 [2021-03-10 23:39:31,618 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 [2021-03-10 23:39:31,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:31,624 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 [2021-03-10 23:39:31,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:31,629 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 [2021-03-10 23:39:31,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:31,633 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 [2021-03-10 23:39:31,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:31,689 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.8 percent of original size [2021-03-10 23:39:31,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 23:39:31,690 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:99, output treesize:55 [2021-03-10 23:39:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:31,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:31,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 23:39:31,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745369172] [2021-03-10 23:39:31,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:39:31,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:31,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:39:31,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:39:31,818 INFO L87 Difference]: Start difference. First operand 9878 states and 36510 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-03-10 23:39:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:33,296 INFO L93 Difference]: Finished difference Result 12825 states and 46418 transitions. [2021-03-10 23:39:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:39:33,299 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 28 [2021-03-10 23:39:33,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:33,325 INFO L225 Difference]: With dead ends: 12825 [2021-03-10 23:39:33,325 INFO L226 Difference]: Without dead ends: 12803 [2021-03-10 23:39:33,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1170.1ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:39:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12803 states. [2021-03-10 23:39:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12803 to 9865. [2021-03-10 23:39:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9865 states, 9864 states have (on average 3.698905109489051) internal successors, (36486), 9864 states have internal predecessors, (36486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9865 states to 9865 states and 36486 transitions. [2021-03-10 23:39:33,472 INFO L78 Accepts]: Start accepts. Automaton has 9865 states and 36486 transitions. Word has length 28 [2021-03-10 23:39:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:33,472 INFO L480 AbstractCegarLoop]: Abstraction has 9865 states and 36486 transitions. [2021-03-10 23:39:33,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-03-10 23:39:33,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9865 states and 36486 transitions. [2021-03-10 23:39:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:33,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:33,487 INFO L519 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] [2021-03-10 23:39:33,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:33,687 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:33,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2056756288, now seen corresponding path program 109 times [2021-03-10 23:39:33,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:33,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218978184] [2021-03-10 23:39:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:33,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218978184] [2021-03-10 23:39:33,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280892775] [2021-03-10 23:39:33,910 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 [2021-03-10 23:39:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:33,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:33,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:33,968 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 [2021-03-10 23:39:33,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:33,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:33,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:33,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:34,079 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 [2021-03-10 23:39:34,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:34,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:34,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:34,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:51 [2021-03-10 23:39:34,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:34,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 23:39:34,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:34,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:34,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:34,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-03-10 23:39:34,155 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 [2021-03-10 23:39:34,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:34,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:34,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:34,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 23:39:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:34,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:34,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:34,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984496463] [2021-03-10 23:39:34,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:34,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:34,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:34,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:34,189 INFO L87 Difference]: Start difference. First operand 9865 states and 36486 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) [2021-03-10 23:39:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:34,884 INFO L93 Difference]: Finished difference Result 13667 states and 49379 transitions. [2021-03-10 23:39:34,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:39:34,885 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 [2021-03-10 23:39:34,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:34,910 INFO L225 Difference]: With dead ends: 13667 [2021-03-10 23:39:34,910 INFO L226 Difference]: Without dead ends: 13624 [2021-03-10 23:39:34,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 550.9ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:39:34,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13624 states. [2021-03-10 23:39:35,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13624 to 9841. [2021-03-10 23:39:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9841 states, 9840 states have (on average 3.7010162601626018) internal successors, (36418), 9840 states have internal predecessors, (36418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9841 states to 9841 states and 36418 transitions. [2021-03-10 23:39:35,072 INFO L78 Accepts]: Start accepts. Automaton has 9841 states and 36418 transitions. Word has length 28 [2021-03-10 23:39:35,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:35,072 INFO L480 AbstractCegarLoop]: Abstraction has 9841 states and 36418 transitions. [2021-03-10 23:39:35,073 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) [2021-03-10 23:39:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 9841 states and 36418 transitions. [2021-03-10 23:39:35,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:35,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:35,087 INFO L519 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] [2021-03-10 23:39:35,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-03-10 23:39:35,287 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1666712976, now seen corresponding path program 110 times [2021-03-10 23:39:35,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:35,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102163841] [2021-03-10 23:39:35,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:35,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102163841] [2021-03-10 23:39:35,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002865097] [2021-03-10 23:39:35,557 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 [2021-03-10 23:39:35,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:39:35,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:35,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:35,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:35,628 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 [2021-03-10 23:39:35,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:35,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:35,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:35,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:35,849 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 33 treesize of output 25 [2021-03-10 23:39:35,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:35,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:35,855 INFO L518 ElimStorePlain]: Eliminatee v_C_193 vanished before elimination [2021-03-10 23:39:35,856 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 [2021-03-10 23:39:35,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:35,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:35,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:35,860 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-03-10 23:39:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:35,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:35,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:35,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283852992] [2021-03-10 23:39:35,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:35,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:35,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:35,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:35,880 INFO L87 Difference]: Start difference. First operand 9841 states and 36418 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) [2021-03-10 23:39:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:36,639 INFO L93 Difference]: Finished difference Result 11174 states and 40204 transitions. [2021-03-10 23:39:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:39:36,640 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 [2021-03-10 23:39:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:36,664 INFO L225 Difference]: With dead ends: 11174 [2021-03-10 23:39:36,664 INFO L226 Difference]: Without dead ends: 11159 [2021-03-10 23:39:36,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 628.1ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:39:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11159 states. [2021-03-10 23:39:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11159 to 9871. [2021-03-10 23:39:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9871 states, 9870 states have (on average 3.7) internal successors, (36519), 9870 states have internal predecessors, (36519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9871 states to 9871 states and 36519 transitions. [2021-03-10 23:39:36,820 INFO L78 Accepts]: Start accepts. Automaton has 9871 states and 36519 transitions. Word has length 28 [2021-03-10 23:39:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:36,820 INFO L480 AbstractCegarLoop]: Abstraction has 9871 states and 36519 transitions. [2021-03-10 23:39:36,820 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) [2021-03-10 23:39:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand 9871 states and 36519 transitions. [2021-03-10 23:39:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:36,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:36,836 INFO L519 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] [2021-03-10 23:39:37,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:37,036 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:37,036 INFO L82 PathProgramCache]: Analyzing trace with hash -361685040, now seen corresponding path program 111 times [2021-03-10 23:39:37,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:37,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491808649] [2021-03-10 23:39:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:37,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491808649] [2021-03-10 23:39:37,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761872043] [2021-03-10 23:39:37,265 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 [2021-03-10 23:39:37,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:39:37,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:39:37,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:37,326 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 12 treesize of output 11 [2021-03-10 23:39:37,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:37,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:37,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:37,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:37,625 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 [2021-03-10 23:39:37,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:37,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:37,637 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 [2021-03-10 23:39:37,639 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:39:37,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:37,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:37,649 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-03-10 23:39:37,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:37,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-03-10 23:39:37,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:39:37,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:37,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:37,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-03-10 23:39:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:37,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:37,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 23:39:37,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201325240] [2021-03-10 23:39:37,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:39:37,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:37,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:39:37,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:39:37,812 INFO L87 Difference]: Start difference. First operand 9871 states and 36519 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-03-10 23:39:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:39,365 INFO L93 Difference]: Finished difference Result 11259 states and 40478 transitions. [2021-03-10 23:39:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:39:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 28 [2021-03-10 23:39:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:39,389 INFO L225 Difference]: With dead ends: 11259 [2021-03-10 23:39:39,389 INFO L226 Difference]: Without dead ends: 11157 [2021-03-10 23:39:39,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1227.3ms TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:39:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11157 states. [2021-03-10 23:39:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11157 to 9886. [2021-03-10 23:39:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9886 states, 9885 states have (on average 3.6992412746585734) internal successors, (36567), 9885 states have internal predecessors, (36567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9886 states to 9886 states and 36567 transitions. [2021-03-10 23:39:39,554 INFO L78 Accepts]: Start accepts. Automaton has 9886 states and 36567 transitions. Word has length 28 [2021-03-10 23:39:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:39,554 INFO L480 AbstractCegarLoop]: Abstraction has 9886 states and 36567 transitions. [2021-03-10 23:39:39,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-03-10 23:39:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 9886 states and 36567 transitions. [2021-03-10 23:39:39,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:39,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:39,570 INFO L519 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] [2021-03-10 23:39:39,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:39,770 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:39,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:39,770 INFO L82 PathProgramCache]: Analyzing trace with hash 574248976, now seen corresponding path program 112 times [2021-03-10 23:39:39,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:39,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556468371] [2021-03-10 23:39:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:39,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556468371] [2021-03-10 23:39:39,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463733603] [2021-03-10 23:39:39,971 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 [2021-03-10 23:39:39,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:39:39,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:39,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:39,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:40,036 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 18 treesize of output 17 [2021-03-10 23:39:40,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:40,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:40,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:40,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:39:40,231 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 [2021-03-10 23:39:40,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:40,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:40,239 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 [2021-03-10 23:39:40,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:40,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:40,241 INFO L518 ElimStorePlain]: Eliminatee v_C_197 vanished before elimination [2021-03-10 23:39:40,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:40,242 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-03-10 23:39:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:40,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:40,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:40,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352689866] [2021-03-10 23:39:40,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:40,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:40,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:40,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:40,263 INFO L87 Difference]: Start difference. First operand 9886 states and 36567 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) [2021-03-10 23:39:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:40,983 INFO L93 Difference]: Finished difference Result 10714 states and 38904 transitions. [2021-03-10 23:39:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:39:40,984 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 [2021-03-10 23:39:40,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:41,009 INFO L225 Difference]: With dead ends: 10714 [2021-03-10 23:39:41,009 INFO L226 Difference]: Without dead ends: 10689 [2021-03-10 23:39:41,010 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 431.3ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:39:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2021-03-10 23:39:41,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 9911. [2021-03-10 23:39:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9911 states, 9910 states have (on average 3.698284561049445) internal successors, (36650), 9910 states have internal predecessors, (36650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9911 states to 9911 states and 36650 transitions. [2021-03-10 23:39:41,167 INFO L78 Accepts]: Start accepts. Automaton has 9911 states and 36650 transitions. Word has length 28 [2021-03-10 23:39:41,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:41,167 INFO L480 AbstractCegarLoop]: Abstraction has 9911 states and 36650 transitions. [2021-03-10 23:39:41,167 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) [2021-03-10 23:39:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 9911 states and 36650 transitions. [2021-03-10 23:39:41,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:41,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:41,183 INFO L519 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] [2021-03-10 23:39:41,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:41,387 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:41,387 INFO L82 PathProgramCache]: Analyzing trace with hash 705213332, now seen corresponding path program 113 times [2021-03-10 23:39:41,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:41,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291619319] [2021-03-10 23:39:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:41,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291619319] [2021-03-10 23:39:41,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838522035] [2021-03-10 23:39:41,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:41,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:39:41,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:41,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:41,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:41,669 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 [2021-03-10 23:39:41,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:41,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:41,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:41,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:41,807 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 [2021-03-10 23:39:41,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:41,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:41,815 INFO L518 ElimStorePlain]: Eliminatee v_C_199 vanished before elimination [2021-03-10 23:39:41,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:41,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-03-10 23:39:41,841 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 [2021-03-10 23:39:41,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:41,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:41,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:41,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:39:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:41,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:41,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:41,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602958034] [2021-03-10 23:39:41,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:41,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:41,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:41,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:41,871 INFO L87 Difference]: Start difference. First operand 9911 states and 36650 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) [2021-03-10 23:39:42,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:42,834 INFO L93 Difference]: Finished difference Result 11806 states and 42056 transitions. [2021-03-10 23:39:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 23:39:42,835 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 [2021-03-10 23:39:42,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:42,859 INFO L225 Difference]: With dead ends: 11806 [2021-03-10 23:39:42,860 INFO L226 Difference]: Without dead ends: 11744 [2021-03-10 23:39:42,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 574.4ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:39:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11744 states. [2021-03-10 23:39:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11744 to 10000. [2021-03-10 23:39:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10000 states, 9999 states have (on average 3.7012701270127013) internal successors, (37009), 9999 states have internal predecessors, (37009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10000 states to 10000 states and 37009 transitions. [2021-03-10 23:39:43,016 INFO L78 Accepts]: Start accepts. Automaton has 10000 states and 37009 transitions. Word has length 28 [2021-03-10 23:39:43,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:43,016 INFO L480 AbstractCegarLoop]: Abstraction has 10000 states and 37009 transitions. [2021-03-10 23:39:43,016 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) [2021-03-10 23:39:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 10000 states and 37009 transitions. [2021-03-10 23:39:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:43,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:43,031 INFO L519 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] [2021-03-10 23:39:43,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-03-10 23:39:43,231 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:43,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:43,231 INFO L82 PathProgramCache]: Analyzing trace with hash 171178420, now seen corresponding path program 114 times [2021-03-10 23:39:43,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:43,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926071391] [2021-03-10 23:39:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:43,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926071391] [2021-03-10 23:39:43,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958081272] [2021-03-10 23:39:43,455 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 [2021-03-10 23:39:43,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:39:43,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:43,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:43,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:43,524 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 [2021-03-10 23:39:43,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:43,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:43,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:43,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:43,637 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 [2021-03-10 23:39:43,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:43,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:43,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:43,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:51 [2021-03-10 23:39:43,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:43,682 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 [2021-03-10 23:39:43,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:43,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:43,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:43,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-03-10 23:39:43,723 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 [2021-03-10 23:39:43,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:43,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:43,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:43,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:39:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:43,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:43,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:43,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520520364] [2021-03-10 23:39:43,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:43,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:43,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:43,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:43,755 INFO L87 Difference]: Start difference. First operand 10000 states and 37009 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:44,612 INFO L93 Difference]: Finished difference Result 12766 states and 46370 transitions. [2021-03-10 23:39:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:39:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:39:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:44,641 INFO L225 Difference]: With dead ends: 12766 [2021-03-10 23:39:44,641 INFO L226 Difference]: Without dead ends: 12717 [2021-03-10 23:39:44,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 531.7ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:39:44,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12717 states. [2021-03-10 23:39:44,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12717 to 10008. [2021-03-10 23:39:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10008 states, 10007 states have (on average 3.7000099930048966) internal successors, (37026), 10007 states have internal predecessors, (37026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10008 states to 10008 states and 37026 transitions. [2021-03-10 23:39:44,802 INFO L78 Accepts]: Start accepts. Automaton has 10008 states and 37026 transitions. Word has length 28 [2021-03-10 23:39:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:44,802 INFO L480 AbstractCegarLoop]: Abstraction has 10008 states and 37026 transitions. [2021-03-10 23:39:44,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:44,802 INFO L276 IsEmpty]: Start isEmpty. Operand 10008 states and 37026 transitions. [2021-03-10 23:39:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:44,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:44,818 INFO L519 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] [2021-03-10 23:39:45,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:45,031 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:45,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1158670032, now seen corresponding path program 115 times [2021-03-10 23:39:45,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:45,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034578968] [2021-03-10 23:39:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:45,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034578968] [2021-03-10 23:39:45,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819092349] [2021-03-10 23:39:45,270 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 [2021-03-10 23:39:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:45,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:45,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:45,330 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 [2021-03-10 23:39:45,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:45,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:45,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:45,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:39:45,441 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 [2021-03-10 23:39:45,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:45,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:45,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:45,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:51 [2021-03-10 23:39:45,485 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 [2021-03-10 23:39:45,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:45,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:45,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:45,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-03-10 23:39:45,516 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 [2021-03-10 23:39:45,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:45,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:45,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:45,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:39:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:45,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:45,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:45,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431484316] [2021-03-10 23:39:45,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:45,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:45,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:45,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:45,551 INFO L87 Difference]: Start difference. First operand 10008 states and 37026 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) [2021-03-10 23:39:46,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:46,380 INFO L93 Difference]: Finished difference Result 12794 states and 46447 transitions. [2021-03-10 23:39:46,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:39:46,381 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 [2021-03-10 23:39:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:46,409 INFO L225 Difference]: With dead ends: 12794 [2021-03-10 23:39:46,410 INFO L226 Difference]: Without dead ends: 12755 [2021-03-10 23:39:46,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 548.4ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:39:46,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12755 states. [2021-03-10 23:39:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12755 to 10009. [2021-03-10 23:39:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 3.699940047961631) internal successors, (37029), 10008 states have internal predecessors, (37029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 37029 transitions. [2021-03-10 23:39:46,560 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 37029 transitions. Word has length 28 [2021-03-10 23:39:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:46,560 INFO L480 AbstractCegarLoop]: Abstraction has 10009 states and 37029 transitions. [2021-03-10 23:39:46,561 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) [2021-03-10 23:39:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 37029 transitions. [2021-03-10 23:39:46,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:46,575 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:46,575 INFO L519 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] [2021-03-10 23:39:46,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:46,775 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:46,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1324280048, now seen corresponding path program 116 times [2021-03-10 23:39:46,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:46,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127266881] [2021-03-10 23:39:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:46,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127266881] [2021-03-10 23:39:46,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264310788] [2021-03-10 23:39:46,955 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 [2021-03-10 23:39:46,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:39:46,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:46,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:46,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:47,018 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 [2021-03-10 23:39:47,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:47,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:47,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:47,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:39:47,224 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 [2021-03-10 23:39:47,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:47,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:47,233 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 [2021-03-10 23:39:47,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:47,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:47,236 INFO L518 ElimStorePlain]: Eliminatee v_C_205 vanished before elimination [2021-03-10 23:39:47,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:47,236 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-03-10 23:39:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:47,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:47,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:47,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078609705] [2021-03-10 23:39:47,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:47,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:47,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:47,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:47,263 INFO L87 Difference]: Start difference. First operand 10009 states and 37029 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) [2021-03-10 23:39:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:48,033 INFO L93 Difference]: Finished difference Result 10841 states and 39410 transitions. [2021-03-10 23:39:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:39:48,034 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 [2021-03-10 23:39:48,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:48,058 INFO L225 Difference]: With dead ends: 10841 [2021-03-10 23:39:48,058 INFO L226 Difference]: Without dead ends: 10826 [2021-03-10 23:39:48,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 483.7ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:39:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10826 states. [2021-03-10 23:39:48,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10826 to 10033. [2021-03-10 23:39:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10033 states, 10032 states have (on average 3.6982655502392343) internal successors, (37101), 10032 states have internal predecessors, (37101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10033 states to 10033 states and 37101 transitions. [2021-03-10 23:39:48,222 INFO L78 Accepts]: Start accepts. Automaton has 10033 states and 37101 transitions. Word has length 28 [2021-03-10 23:39:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:48,222 INFO L480 AbstractCegarLoop]: Abstraction has 10033 states and 37101 transitions. [2021-03-10 23:39:48,222 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) [2021-03-10 23:39:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 10033 states and 37101 transitions. [2021-03-10 23:39:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:48,238 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:48,238 INFO L519 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] [2021-03-10 23:39:48,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable351 [2021-03-10 23:39:48,439 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:48,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1193315692, now seen corresponding path program 117 times [2021-03-10 23:39:48,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:48,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690377802] [2021-03-10 23:39:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:48,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690377802] [2021-03-10 23:39:48,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471575370] [2021-03-10 23:39:48,680 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 [2021-03-10 23:39:48,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:39:48,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:39:48,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:48,742 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 [2021-03-10 23:39:48,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:48,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:48,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:48,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:48,890 INFO L446 ElimStorePlain]: Different costs {0=[v_C_207], 1=[B]} [2021-03-10 23:39:48,893 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 [2021-03-10 23:39:48,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:48,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:48,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:48,906 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 [2021-03-10 23:39:48,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:48,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:48,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:48,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:27 [2021-03-10 23:39:48,943 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 [2021-03-10 23:39:48,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:48,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:48,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:48,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 23:39:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:48,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:48,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:48,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18596324] [2021-03-10 23:39:48,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:48,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:48,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:48,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:48,974 INFO L87 Difference]: Start difference. First operand 10033 states and 37101 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) [2021-03-10 23:39:50,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:50,310 INFO L93 Difference]: Finished difference Result 11833 states and 42262 transitions. [2021-03-10 23:39:50,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:39:50,311 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 [2021-03-10 23:39:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:50,337 INFO L225 Difference]: With dead ends: 11833 [2021-03-10 23:39:50,337 INFO L226 Difference]: Without dead ends: 11796 [2021-03-10 23:39:50,337 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 839.0ms TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:39:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11796 states. [2021-03-10 23:39:50,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11796 to 10056. [2021-03-10 23:39:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10056 states, 10055 states have (on average 3.7013426156141223) internal successors, (37217), 10055 states have internal predecessors, (37217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10056 states to 10056 states and 37217 transitions. [2021-03-10 23:39:50,499 INFO L78 Accepts]: Start accepts. Automaton has 10056 states and 37217 transitions. Word has length 28 [2021-03-10 23:39:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:50,499 INFO L480 AbstractCegarLoop]: Abstraction has 10056 states and 37217 transitions. [2021-03-10 23:39:50,499 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) [2021-03-10 23:39:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 10056 states and 37217 transitions. [2021-03-10 23:39:50,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:50,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:50,516 INFO L519 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] [2021-03-10 23:39:50,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:50,717 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:50,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:50,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1151240340, now seen corresponding path program 118 times [2021-03-10 23:39:50,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:50,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806747605] [2021-03-10 23:39:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:50,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806747605] [2021-03-10 23:39:50,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394887158] [2021-03-10 23:39:50,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:50,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:39:50,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:50,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:50,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:50,978 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 18 treesize of output 17 [2021-03-10 23:39:50,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:50,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:50,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:50,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:39:51,098 INFO L446 ElimStorePlain]: Different costs {0=[v_C_209], 1=[B]} [2021-03-10 23:39:51,101 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 [2021-03-10 23:39:51,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:51,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:51,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:51,115 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 [2021-03-10 23:39:51,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:51,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:51,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:51,123 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:19 [2021-03-10 23:39:51,176 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 20 treesize of output 12 [2021-03-10 23:39:51,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:51,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:51,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:51,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 23:39:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:51,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:51,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:51,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279433626] [2021-03-10 23:39:51,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:51,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:51,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:51,210 INFO L87 Difference]: Start difference. First operand 10056 states and 37217 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) [2021-03-10 23:39:52,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:52,708 INFO L93 Difference]: Finished difference Result 11294 states and 40674 transitions. [2021-03-10 23:39:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:39:52,709 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 [2021-03-10 23:39:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:52,736 INFO L225 Difference]: With dead ends: 11294 [2021-03-10 23:39:52,736 INFO L226 Difference]: Without dead ends: 11257 [2021-03-10 23:39:52,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1113.9ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:39:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2021-03-10 23:39:52,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 10088. [2021-03-10 23:39:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10088 states, 10087 states have (on average 3.6995142262317833) internal successors, (37317), 10087 states have internal predecessors, (37317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10088 states to 10088 states and 37317 transitions. [2021-03-10 23:39:52,949 INFO L78 Accepts]: Start accepts. Automaton has 10088 states and 37317 transitions. Word has length 28 [2021-03-10 23:39:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:52,949 INFO L480 AbstractCegarLoop]: Abstraction has 10088 states and 37317 transitions. [2021-03-10 23:39:52,949 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) [2021-03-10 23:39:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 10088 states and 37317 transitions. [2021-03-10 23:39:52,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:52,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:52,967 INFO L519 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] [2021-03-10 23:39:53,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:53,169 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:53,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:53,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1950581624, now seen corresponding path program 119 times [2021-03-10 23:39:53,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:53,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597366323] [2021-03-10 23:39:53,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:53,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597366323] [2021-03-10 23:39:53,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672856686] [2021-03-10 23:39:53,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:53,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:39:53,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:53,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:53,427 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 [2021-03-10 23:39:53,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:53,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:53,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:53,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:39:53,517 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 [2021-03-10 23:39:53,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:53,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:53,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:53,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2021-03-10 23:39:53,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:53,597 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 [2021-03-10 23:39:53,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:53,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:53,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:53,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-03-10 23:39:53,647 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 [2021-03-10 23:39:53,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:53,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:53,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:53,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 23:39:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:53,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:53,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:53,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609801438] [2021-03-10 23:39:53,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:53,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:53,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:53,681 INFO L87 Difference]: Start difference. First operand 10088 states and 37317 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:54,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:54,619 INFO L93 Difference]: Finished difference Result 12971 states and 47060 transitions. [2021-03-10 23:39:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:39:54,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:39:54,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:54,648 INFO L225 Difference]: With dead ends: 12971 [2021-03-10 23:39:54,648 INFO L226 Difference]: Without dead ends: 12938 [2021-03-10 23:39:54,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 615.2ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:39:54,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12938 states. [2021-03-10 23:39:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12938 to 10098. [2021-03-10 23:39:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10098 states, 10097 states have (on average 3.6988214321085473) internal successors, (37347), 10097 states have internal predecessors, (37347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:54,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10098 states to 10098 states and 37347 transitions. [2021-03-10 23:39:54,812 INFO L78 Accepts]: Start accepts. Automaton has 10098 states and 37347 transitions. Word has length 28 [2021-03-10 23:39:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:54,812 INFO L480 AbstractCegarLoop]: Abstraction has 10098 states and 37347 transitions. [2021-03-10 23:39:54,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 10098 states and 37347 transitions. [2021-03-10 23:39:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:54,829 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:54,829 INFO L519 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] [2021-03-10 23:39:55,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-03-10 23:39:55,030 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:55,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:55,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1356894060, now seen corresponding path program 120 times [2021-03-10 23:39:55,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:55,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935640436] [2021-03-10 23:39:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:55,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935640436] [2021-03-10 23:39:55,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991137847] [2021-03-10 23:39:55,214 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 [2021-03-10 23:39:55,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:39:55,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:55,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:55,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:55,279 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 [2021-03-10 23:39:55,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:55,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:55,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:55,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:55,362 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 [2021-03-10 23:39:55,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:55,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:55,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:55,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:41 [2021-03-10 23:39:55,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:55,439 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 [2021-03-10 23:39:55,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:55,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:55,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:55,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-03-10 23:39:55,475 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 20 treesize of output 12 [2021-03-10 23:39:55,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:55,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:55,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:55,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:39:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:55,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:55,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:55,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496758535] [2021-03-10 23:39:55,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:55,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:55,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:55,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:55,511 INFO L87 Difference]: Start difference. First operand 10098 states and 37347 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) [2021-03-10 23:39:56,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:56,426 INFO L93 Difference]: Finished difference Result 13030 states and 47216 transitions. [2021-03-10 23:39:56,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:39:56,427 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 [2021-03-10 23:39:56,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:56,455 INFO L225 Difference]: With dead ends: 13030 [2021-03-10 23:39:56,456 INFO L226 Difference]: Without dead ends: 13003 [2021-03-10 23:39:56,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 637.9ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:39:56,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13003 states. [2021-03-10 23:39:56,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13003 to 10095. [2021-03-10 23:39:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10095 states, 10094 states have (on average 3.699821676243313) internal successors, (37346), 10094 states have internal predecessors, (37346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10095 states to 10095 states and 37346 transitions. [2021-03-10 23:39:56,625 INFO L78 Accepts]: Start accepts. Automaton has 10095 states and 37346 transitions. Word has length 28 [2021-03-10 23:39:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:56,626 INFO L480 AbstractCegarLoop]: Abstraction has 10095 states and 37346 transitions. [2021-03-10 23:39:56,626 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) [2021-03-10 23:39:56,626 INFO L276 IsEmpty]: Start isEmpty. Operand 10095 states and 37346 transitions. [2021-03-10 23:39:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:56,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:56,642 INFO L519 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] [2021-03-10 23:39:56,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:56,843 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:56,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1127646672, now seen corresponding path program 121 times [2021-03-10 23:39:56,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:56,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25524075] [2021-03-10 23:39:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:57,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25524075] [2021-03-10 23:39:57,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380776955] [2021-03-10 23:39:57,050 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 [2021-03-10 23:39:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:57,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:57,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:57,114 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 [2021-03-10 23:39:57,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:57,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:57,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:57,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:39:57,198 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 [2021-03-10 23:39:57,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:57,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:57,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:57,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2021-03-10 23:39:57,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:57,243 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 [2021-03-10 23:39:57,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:57,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:57,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:57,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:19 [2021-03-10 23:39:57,304 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 20 treesize of output 12 [2021-03-10 23:39:57,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:57,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:57,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:57,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:39:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:57,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:57,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 23:39:57,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720642222] [2021-03-10 23:39:57,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:39:57,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:57,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:39:57,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:39:57,341 INFO L87 Difference]: Start difference. First operand 10095 states and 37346 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) [2021-03-10 23:39:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:58,238 INFO L93 Difference]: Finished difference Result 13009 states and 47165 transitions. [2021-03-10 23:39:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:39:58,239 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 [2021-03-10 23:39:58,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:58,268 INFO L225 Difference]: With dead ends: 13009 [2021-03-10 23:39:58,268 INFO L226 Difference]: Without dead ends: 12988 [2021-03-10 23:39:58,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 622.4ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:39:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12988 states. [2021-03-10 23:39:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12988 to 10099. [2021-03-10 23:39:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10099 states, 10098 states have (on average 3.699742523271935) internal successors, (37360), 10098 states have internal predecessors, (37360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10099 states to 10099 states and 37360 transitions. [2021-03-10 23:39:58,432 INFO L78 Accepts]: Start accepts. Automaton has 10099 states and 37360 transitions. Word has length 28 [2021-03-10 23:39:58,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:58,432 INFO L480 AbstractCegarLoop]: Abstraction has 10099 states and 37360 transitions. [2021-03-10 23:39:58,432 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) [2021-03-10 23:39:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 10099 states and 37360 transitions. [2021-03-10 23:39:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:39:58,449 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:58,449 INFO L519 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] [2021-03-10 23:39:58,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-03-10 23:39:58,649 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:58,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1389598472, now seen corresponding path program 122 times [2021-03-10 23:39:58,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:58,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684684100] [2021-03-10 23:39:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:58,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684684100] [2021-03-10 23:39:58,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506371916] [2021-03-10 23:39:58,819 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 [2021-03-10 23:39:58,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:39:58,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:58,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:39:58,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:58,871 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 [2021-03-10 23:39:58,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:58,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:58,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:58,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:39:58,927 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 [2021-03-10 23:39:58,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:58,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:58,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:58,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-03-10 23:39:59,017 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-03-10 23:39:59,018 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 [2021-03-10 23:39:59,020 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:59,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:59,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:59,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:103, output treesize:20 [2021-03-10 23:39:59,085 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 [2021-03-10 23:39:59,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:59,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:59,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:59,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 23:39:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:59,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:59,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:39:59,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442936944] [2021-03-10 23:39:59,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:39:59,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:59,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:39:59,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:39:59,117 INFO L87 Difference]: Start difference. First operand 10099 states and 37360 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) [2021-03-10 23:40:00,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:00,092 INFO L93 Difference]: Finished difference Result 13035 states and 47299 transitions. [2021-03-10 23:40:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:40:00,093 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 [2021-03-10 23:40:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:00,124 INFO L225 Difference]: With dead ends: 13035 [2021-03-10 23:40:00,124 INFO L226 Difference]: Without dead ends: 13020 [2021-03-10 23:40:00,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 622.3ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:40:00,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13020 states. [2021-03-10 23:40:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13020 to 10123. [2021-03-10 23:40:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10123 states, 10122 states have (on average 3.698083382730686) internal successors, (37432), 10122 states have internal predecessors, (37432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10123 states to 10123 states and 37432 transitions. [2021-03-10 23:40:00,301 INFO L78 Accepts]: Start accepts. Automaton has 10123 states and 37432 transitions. Word has length 28 [2021-03-10 23:40:00,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:00,301 INFO L480 AbstractCegarLoop]: Abstraction has 10123 states and 37432 transitions. [2021-03-10 23:40:00,301 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) [2021-03-10 23:40:00,301 INFO L276 IsEmpty]: Start isEmpty. Operand 10123 states and 37432 transitions. [2021-03-10 23:40:00,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:40:00,320 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:00,320 INFO L519 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] [2021-03-10 23:40:00,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:00,520 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:00,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:00,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1597931756, now seen corresponding path program 123 times [2021-03-10 23:40:00,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:00,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380624847] [2021-03-10 23:40:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:00,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380624847] [2021-03-10 23:40:00,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021345960] [2021-03-10 23:40:00,693 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 [2021-03-10 23:40:00,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:40:00,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:00,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:40:00,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:00,745 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 [2021-03-10 23:40:00,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:00,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:00,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:00,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:40:00,826 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 [2021-03-10 23:40:00,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:00,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:00,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:00,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2021-03-10 23:40:00,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:01,022 INFO L354 Elim1Store]: treesize reduction 23, result has 48.9 percent of original size [2021-03-10 23:40:01,023 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 92 [2021-03-10 23:40:01,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:01,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:01,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:01,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:111, output treesize:63 [2021-03-10 23:40:01,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:01,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-03-10 23:40:01,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:40:01,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:01,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:01,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-03-10 23:40:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:01,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:01,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-10 23:40:01,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974777728] [2021-03-10 23:40:01,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:40:01,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:01,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:40:01,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:40:01,341 INFO L87 Difference]: Start difference. First operand 10123 states and 37432 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) [2021-03-10 23:40:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:03,010 INFO L93 Difference]: Finished difference Result 13114 states and 47500 transitions. [2021-03-10 23:40:03,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:40:03,012 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 [2021-03-10 23:40:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:03,043 INFO L225 Difference]: With dead ends: 13114 [2021-03-10 23:40:03,043 INFO L226 Difference]: Without dead ends: 13084 [2021-03-10 23:40:03,043 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1021.4ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:40:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13084 states. [2021-03-10 23:40:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13084 to 10141. [2021-03-10 23:40:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10141 states, 10140 states have (on average 3.6974358974358976) internal successors, (37492), 10140 states have internal predecessors, (37492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10141 states to 10141 states and 37492 transitions. [2021-03-10 23:40:03,310 INFO L78 Accepts]: Start accepts. Automaton has 10141 states and 37492 transitions. Word has length 28 [2021-03-10 23:40:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:03,310 INFO L480 AbstractCegarLoop]: Abstraction has 10141 states and 37492 transitions. [2021-03-10 23:40:03,310 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) [2021-03-10 23:40:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 10141 states and 37492 transitions. [2021-03-10 23:40:03,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:40:03,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:03,326 INFO L519 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] [2021-03-10 23:40:03,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-03-10 23:40:03,527 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:03,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:03,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1625594160, now seen corresponding path program 124 times [2021-03-10 23:40:03,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:03,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639353592] [2021-03-10 23:40:03,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:03,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639353592] [2021-03-10 23:40:03,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403011253] [2021-03-10 23:40:03,718 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:03,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:40:03,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:03,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:40:03,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:03,772 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 12 treesize of output 11 [2021-03-10 23:40:03,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:03,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:03,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:03,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:40:03,831 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 [2021-03-10 23:40:03,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:03,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:03,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:03,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-03-10 23:40:03,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:03,941 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 [2021-03-10 23:40:03,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:03,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:03,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:03,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:26 [2021-03-10 23:40:03,994 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 [2021-03-10 23:40:03,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:03,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:03,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:03,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:40:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:04,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:04,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:40:04,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042111422] [2021-03-10 23:40:04,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:40:04,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:04,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:40:04,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:40:04,033 INFO L87 Difference]: Start difference. First operand 10141 states and 37492 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) [2021-03-10 23:40:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:05,288 INFO L93 Difference]: Finished difference Result 14259 states and 51409 transitions. [2021-03-10 23:40:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:40:05,300 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 [2021-03-10 23:40:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:05,332 INFO L225 Difference]: With dead ends: 14259 [2021-03-10 23:40:05,332 INFO L226 Difference]: Without dead ends: 14234 [2021-03-10 23:40:05,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 778.1ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:40:05,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14234 states. [2021-03-10 23:40:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14234 to 10137. [2021-03-10 23:40:05,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10137 states, 10136 states have (on average 3.697513812154696) internal successors, (37478), 10136 states have internal predecessors, (37478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10137 states to 10137 states and 37478 transitions. [2021-03-10 23:40:05,546 INFO L78 Accepts]: Start accepts. Automaton has 10137 states and 37478 transitions. Word has length 28 [2021-03-10 23:40:05,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:05,546 INFO L480 AbstractCegarLoop]: Abstraction has 10137 states and 37478 transitions. [2021-03-10 23:40:05,547 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) [2021-03-10 23:40:05,547 INFO L276 IsEmpty]: Start isEmpty. Operand 10137 states and 37478 transitions. [2021-03-10 23:40:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:40:05,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:05,567 INFO L519 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] [2021-03-10 23:40:05,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:05,769 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:05,769 INFO L82 PathProgramCache]: Analyzing trace with hash 555118996, now seen corresponding path program 125 times [2021-03-10 23:40:05,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:05,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101664228] [2021-03-10 23:40:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:05,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101664228] [2021-03-10 23:40:05,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374134914] [2021-03-10 23:40:05,982 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 [2021-03-10 23:40:06,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:40:06,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:06,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:40:06,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:06,040 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 [2021-03-10 23:40:06,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:06,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:06,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:06,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:40:06,103 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 [2021-03-10 23:40:06,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:06,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:06,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:06,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-03-10 23:40:06,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:06,226 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 [2021-03-10 23:40:06,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:06,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:06,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:06,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:26 [2021-03-10 23:40:06,270 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 [2021-03-10 23:40:06,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:06,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:06,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:06,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:40:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:06,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:06,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:40:06,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179104583] [2021-03-10 23:40:06,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:40:06,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:06,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:40:06,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:40:06,313 INFO L87 Difference]: Start difference. First operand 10137 states and 37478 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) [2021-03-10 23:40:07,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:07,427 INFO L93 Difference]: Finished difference Result 13112 states and 47537 transitions. [2021-03-10 23:40:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:40:07,428 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 [2021-03-10 23:40:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:07,458 INFO L225 Difference]: With dead ends: 13112 [2021-03-10 23:40:07,458 INFO L226 Difference]: Without dead ends: 13097 [2021-03-10 23:40:07,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 704.5ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:40:07,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13097 states. [2021-03-10 23:40:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13097 to 10123. [2021-03-10 23:40:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10123 states, 10122 states have (on average 3.699664098004347) internal successors, (37448), 10122 states have internal predecessors, (37448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10123 states to 10123 states and 37448 transitions. [2021-03-10 23:40:07,632 INFO L78 Accepts]: Start accepts. Automaton has 10123 states and 37448 transitions. Word has length 28 [2021-03-10 23:40:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:07,633 INFO L480 AbstractCegarLoop]: Abstraction has 10123 states and 37448 transitions. [2021-03-10 23:40:07,633 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) [2021-03-10 23:40:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 10123 states and 37448 transitions. [2021-03-10 23:40:07,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:40:07,648 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:07,648 INFO L519 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] [2021-03-10 23:40:07,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:07,849 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:07,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:07,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1956104880, now seen corresponding path program 126 times [2021-03-10 23:40:07,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:07,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869967554] [2021-03-10 23:40:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:08,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869967554] [2021-03-10 23:40:08,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384501116] [2021-03-10 23:40:08,077 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 [2021-03-10 23:40:08,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:40:08,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:08,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:40:08,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:08,136 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 [2021-03-10 23:40:08,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:08,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:08,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:08,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-03-10 23:40:08,195 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 [2021-03-10 23:40:08,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:08,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:08,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:08,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2021-03-10 23:40:08,343 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 [2021-03-10 23:40:08,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:08,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:08,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:08,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:22 [2021-03-10 23:40:08,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:08,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-03-10 23:40:08,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:40:08,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:08,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:08,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-03-10 23:40:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:08,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:08,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-10 23:40:08,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121520858] [2021-03-10 23:40:08,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:40:08,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:08,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:40:08,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:40:08,656 INFO L87 Difference]: Start difference. First operand 10123 states and 37448 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) [2021-03-10 23:40:11,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:11,286 INFO L93 Difference]: Finished difference Result 13236 states and 47871 transitions. [2021-03-10 23:40:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:40:11,288 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 [2021-03-10 23:40:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:11,320 INFO L225 Difference]: With dead ends: 13236 [2021-03-10 23:40:11,320 INFO L226 Difference]: Without dead ends: 13206 [2021-03-10 23:40:11,320 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1460.5ms TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:40:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13206 states. [2021-03-10 23:40:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13206 to 10158. [2021-03-10 23:40:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10158 states, 10157 states have (on average 3.698828394210889) internal successors, (37569), 10157 states have internal predecessors, (37569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10158 states to 10158 states and 37569 transitions. [2021-03-10 23:40:11,520 INFO L78 Accepts]: Start accepts. Automaton has 10158 states and 37569 transitions. Word has length 28 [2021-03-10 23:40:11,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:11,521 INFO L480 AbstractCegarLoop]: Abstraction has 10158 states and 37569 transitions. [2021-03-10 23:40:11,521 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) [2021-03-10 23:40:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 10158 states and 37569 transitions. [2021-03-10 23:40:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:40:11,540 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:11,540 INFO L519 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] [2021-03-10 23:40:11,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:11,740 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1416815204, now seen corresponding path program 127 times [2021-03-10 23:40:11,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:11,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403213041] [2021-03-10 23:40:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:11,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403213041] [2021-03-10 23:40:11,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966831022] [2021-03-10 23:40:11,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:40:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:12,016 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 [2021-03-10 23:40:12,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:12,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:12,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:12,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:40:12,079 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 [2021-03-10 23:40:12,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:12,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:12,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:12,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-03-10 23:40:12,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:12,195 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 [2021-03-10 23:40:12,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:12,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:12,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:12,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:26 [2021-03-10 23:40:12,239 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 [2021-03-10 23:40:12,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:12,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:12,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:12,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 23:40:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:12,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:12,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:40:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106061990] [2021-03-10 23:40:12,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:40:12,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:40:12,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:40:12,286 INFO L87 Difference]: Start difference. First operand 10158 states and 37569 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) [2021-03-10 23:40:13,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:13,484 INFO L93 Difference]: Finished difference Result 14305 states and 51598 transitions. [2021-03-10 23:40:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:40:13,485 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 [2021-03-10 23:40:13,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:13,518 INFO L225 Difference]: With dead ends: 14305 [2021-03-10 23:40:13,519 INFO L226 Difference]: Without dead ends: 14290 [2021-03-10 23:40:13,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 757.7ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:40:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14290 states. [2021-03-10 23:40:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14290 to 10149. [2021-03-10 23:40:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10149 states, 10148 states have (on average 3.6982656681119432) internal successors, (37530), 10148 states have internal predecessors, (37530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10149 states to 10149 states and 37530 transitions. [2021-03-10 23:40:13,714 INFO L78 Accepts]: Start accepts. Automaton has 10149 states and 37530 transitions. Word has length 28 [2021-03-10 23:40:13,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:13,714 INFO L480 AbstractCegarLoop]: Abstraction has 10149 states and 37530 transitions. [2021-03-10 23:40:13,714 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) [2021-03-10 23:40:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 10149 states and 37530 transitions. [2021-03-10 23:40:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:40:13,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:13,730 INFO L519 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] [2021-03-10 23:40:13,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-03-10 23:40:13,931 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:13,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:13,931 INFO L82 PathProgramCache]: Analyzing trace with hash 196945872, now seen corresponding path program 128 times [2021-03-10 23:40:13,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:13,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673505103] [2021-03-10 23:40:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:14,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673505103] [2021-03-10 23:40:14,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813886022] [2021-03-10 23:40:14,158 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 [2021-03-10 23:40:14,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:40:14,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:14,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:40:14,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:14,213 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 [2021-03-10 23:40:14,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:14,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:14,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:14,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-03-10 23:40:14,273 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 [2021-03-10 23:40:14,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:14,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:14,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:14,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-03-10 23:40:14,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:14,395 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 [2021-03-10 23:40:14,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:14,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:14,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:14,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:26 [2021-03-10 23:40:14,443 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 [2021-03-10 23:40:14,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:14,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:14,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:14,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 23:40:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:14,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:14,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 23:40:14,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19346531] [2021-03-10 23:40:14,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:40:14,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:14,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:40:14,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:40:14,488 INFO L87 Difference]: Start difference. First operand 10149 states and 37530 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) [2021-03-10 23:40:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:15,521 INFO L93 Difference]: Finished difference Result 13170 states and 47718 transitions. [2021-03-10 23:40:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:40:15,523 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 [2021-03-10 23:40:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:15,555 INFO L225 Difference]: With dead ends: 13170 [2021-03-10 23:40:15,555 INFO L226 Difference]: Without dead ends: 13145 [2021-03-10 23:40:15,555 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 686.3ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:40:15,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2021-03-10 23:40:15,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 10143. [2021-03-10 23:40:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10143 states, 10142 states have (on average 3.699467560638927) internal successors, (37520), 10142 states have internal predecessors, (37520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10143 states to 10143 states and 37520 transitions. [2021-03-10 23:40:15,764 INFO L78 Accepts]: Start accepts. Automaton has 10143 states and 37520 transitions. Word has length 28 [2021-03-10 23:40:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:15,764 INFO L480 AbstractCegarLoop]: Abstraction has 10143 states and 37520 transitions. [2021-03-10 23:40:15,764 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) [2021-03-10 23:40:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 10143 states and 37520 transitions. [2021-03-10 23:40:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:40:15,780 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:15,780 INFO L519 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] [2021-03-10 23:40:15,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:15,980 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:15,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1892178224, now seen corresponding path program 129 times [2021-03-10 23:40:15,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:15,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457055722] [2021-03-10 23:40:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:16,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457055722] [2021-03-10 23:40:16,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195317346] [2021-03-10 23:40:16,214 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 [2021-03-10 23:40:16,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:40:16,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:16,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 23:40:16,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:16,281 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 [2021-03-10 23:40:16,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:16,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:16,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:16,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-03-10 23:40:16,375 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 [2021-03-10 23:40:16,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:16,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:16,396 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. [2021-03-10 23:40:16,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:37 [2021-03-10 23:40:16,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:16,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:16,558 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-03-10 23:40:16,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:40:16,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:16,611 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. [2021-03-10 23:40:16,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:76 [2021-03-10 23:40:16,911 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:40:16,995 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_25, v_prenex_26], 2=[A, v_prenex_28]} [2021-03-10 23:40:17,000 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 [2021-03-10 23:40:17,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:17,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:17,067 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 [2021-03-10 23:40:17,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:17,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:17,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:17,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-03-10 23:40:17,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:17,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:17,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:17,186 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 [2021-03-10 23:40:17,188 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:17,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:17,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 23:40:17,235 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:117, output treesize:83 [2021-03-10 23:40:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:17,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:17,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-10 23:40:17,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061758315] [2021-03-10 23:40:17,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:40:17,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:17,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:40:17,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:40:17,465 INFO L87 Difference]: Start difference. First operand 10143 states and 37520 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) [2021-03-10 23:40:18,788 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-10 23:40:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:19,447 INFO L93 Difference]: Finished difference Result 13091 states and 47506 transitions. [2021-03-10 23:40:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:40:19,448 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 [2021-03-10 23:40:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:19,476 INFO L225 Difference]: With dead ends: 13091 [2021-03-10 23:40:19,476 INFO L226 Difference]: Without dead ends: 13076 [2021-03-10 23:40:19,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1593.0ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:40:19,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13076 states. [2021-03-10 23:40:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13076 to 10135. [2021-03-10 23:40:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10135 states, 10134 states have (on average 3.700414446417999) internal successors, (37500), 10134 states have internal predecessors, (37500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:19,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10135 states to 10135 states and 37500 transitions. [2021-03-10 23:40:19,649 INFO L78 Accepts]: Start accepts. Automaton has 10135 states and 37500 transitions. Word has length 28 [2021-03-10 23:40:19,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:19,649 INFO L480 AbstractCegarLoop]: Abstraction has 10135 states and 37500 transitions. [2021-03-10 23:40:19,649 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) [2021-03-10 23:40:19,649 INFO L276 IsEmpty]: Start isEmpty. Operand 10135 states and 37500 transitions. [2021-03-10 23:40:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:19,664 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:19,664 INFO L519 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] [2021-03-10 23:40:19,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:19,864 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2051579474, now seen corresponding path program 130 times [2021-03-10 23:40:19,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:19,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969587573] [2021-03-10 23:40:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:19,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969587573] [2021-03-10 23:40:19,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173098758] [2021-03-10 23:40:19,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:19,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:40:19,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:19,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:19,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:20,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:20,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 23:40:20,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189179074] [2021-03-10 23:40:20,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:40:20,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:40:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:40:20,005 INFO L87 Difference]: Start difference. First operand 10135 states and 37500 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) [2021-03-10 23:40:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:20,240 INFO L93 Difference]: Finished difference Result 15995 states and 56325 transitions. [2021-03-10 23:40:20,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:40:20,241 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 [2021-03-10 23:40:20,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:20,275 INFO L225 Difference]: With dead ends: 15995 [2021-03-10 23:40:20,275 INFO L226 Difference]: Without dead ends: 15853 [2021-03-10 23:40:20,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:40:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15853 states. [2021-03-10 23:40:20,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15853 to 10987. [2021-03-10 23:40:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10987 states, 10986 states have (on average 3.6817768068450754) internal successors, (40448), 10986 states have internal predecessors, (40448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10987 states to 10987 states and 40448 transitions. [2021-03-10 23:40:20,468 INFO L78 Accepts]: Start accepts. Automaton has 10987 states and 40448 transitions. Word has length 30 [2021-03-10 23:40:20,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:20,468 INFO L480 AbstractCegarLoop]: Abstraction has 10987 states and 40448 transitions. [2021-03-10 23:40:20,468 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) [2021-03-10 23:40:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand 10987 states and 40448 transitions. [2021-03-10 23:40:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:20,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:20,485 INFO L519 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] [2021-03-10 23:40:20,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable395 [2021-03-10 23:40:20,687 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:20,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:20,687 INFO L82 PathProgramCache]: Analyzing trace with hash 517875058, now seen corresponding path program 131 times [2021-03-10 23:40:20,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:20,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488522587] [2021-03-10 23:40:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:20,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488522587] [2021-03-10 23:40:20,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226017978] [2021-03-10 23:40:20,728 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 [2021-03-10 23:40:20,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:40:20,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:20,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:20,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:20,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 23:40:20,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437233232] [2021-03-10 23:40:20,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:40:20,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:40:20,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:40:20,821 INFO L87 Difference]: Start difference. First operand 10987 states and 40448 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) [2021-03-10 23:40:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:21,102 INFO L93 Difference]: Finished difference Result 16968 states and 61160 transitions. [2021-03-10 23:40:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:40:21,103 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 [2021-03-10 23:40:21,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:21,143 INFO L225 Difference]: With dead ends: 16968 [2021-03-10 23:40:21,143 INFO L226 Difference]: Without dead ends: 16847 [2021-03-10 23:40:21,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:40:21,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16847 states. [2021-03-10 23:40:21,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16847 to 14614. [2021-03-10 23:40:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14614 states, 14613 states have (on average 3.7212071443235475) internal successors, (54378), 14613 states have internal predecessors, (54378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:21,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14614 states to 14614 states and 54378 transitions. [2021-03-10 23:40:21,434 INFO L78 Accepts]: Start accepts. Automaton has 14614 states and 54378 transitions. Word has length 30 [2021-03-10 23:40:21,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:21,434 INFO L480 AbstractCegarLoop]: Abstraction has 14614 states and 54378 transitions. [2021-03-10 23:40:21,434 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) [2021-03-10 23:40:21,434 INFO L276 IsEmpty]: Start isEmpty. Operand 14614 states and 54378 transitions. [2021-03-10 23:40:21,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:21,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:21,461 INFO L519 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] [2021-03-10 23:40:21,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:21,662 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:21,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1497741678, now seen corresponding path program 132 times [2021-03-10 23:40:21,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:21,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152997992] [2021-03-10 23:40:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:21,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152997992] [2021-03-10 23:40:21,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768643593] [2021-03-10 23:40:21,708 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 [2021-03-10 23:40:21,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:40:21,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:21,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:21,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:21,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:21,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 23:40:21,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145179956] [2021-03-10 23:40:21,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:40:21,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:21,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:40:21,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:40:21,809 INFO L87 Difference]: Start difference. First operand 14614 states and 54378 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) [2021-03-10 23:40:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:22,088 INFO L93 Difference]: Finished difference Result 23659 states and 86826 transitions. [2021-03-10 23:40:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:40:22,089 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 [2021-03-10 23:40:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:22,147 INFO L225 Difference]: With dead ends: 23659 [2021-03-10 23:40:22,147 INFO L226 Difference]: Without dead ends: 23383 [2021-03-10 23:40:22,147 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:40:22,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23383 states. [2021-03-10 23:40:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23383 to 20447. [2021-03-10 23:40:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20447 states, 20446 states have (on average 3.7782940428445664) internal successors, (77251), 20446 states have internal predecessors, (77251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20447 states to 20447 states and 77251 transitions. [2021-03-10 23:40:22,549 INFO L78 Accepts]: Start accepts. Automaton has 20447 states and 77251 transitions. Word has length 30 [2021-03-10 23:40:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:22,549 INFO L480 AbstractCegarLoop]: Abstraction has 20447 states and 77251 transitions. [2021-03-10 23:40:22,549 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) [2021-03-10 23:40:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 20447 states and 77251 transitions. [2021-03-10 23:40:22,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:22,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:22,584 INFO L519 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] [2021-03-10 23:40:22,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:22,785 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:22,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:22,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1273390866, now seen corresponding path program 133 times [2021-03-10 23:40:22,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:22,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510205467] [2021-03-10 23:40:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:22,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510205467] [2021-03-10 23:40:22,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498885285] [2021-03-10 23:40:22,816 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 [2021-03-10 23:40:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:22,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:22,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:22,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:22,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:40:22,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451412468] [2021-03-10 23:40:22,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:40:22,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:22,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:40:22,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:40:22,906 INFO L87 Difference]: Start difference. First operand 20447 states and 77251 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) [2021-03-10 23:40:23,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:23,112 INFO L93 Difference]: Finished difference Result 22946 states and 84507 transitions. [2021-03-10 23:40:23,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:40:23,113 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 [2021-03-10 23:40:23,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:23,165 INFO L225 Difference]: With dead ends: 22946 [2021-03-10 23:40:23,165 INFO L226 Difference]: Without dead ends: 22920 [2021-03-10 23:40:23,166 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:40:23,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22920 states. [2021-03-10 23:40:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22920 to 18795. [2021-03-10 23:40:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18795 states, 18794 states have (on average 3.7447057571565394) internal successors, (70378), 18794 states have internal predecessors, (70378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18795 states to 18795 states and 70378 transitions. [2021-03-10 23:40:23,523 INFO L78 Accepts]: Start accepts. Automaton has 18795 states and 70378 transitions. Word has length 30 [2021-03-10 23:40:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:23,524 INFO L480 AbstractCegarLoop]: Abstraction has 18795 states and 70378 transitions. [2021-03-10 23:40:23,524 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) [2021-03-10 23:40:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 18795 states and 70378 transitions. [2021-03-10 23:40:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:23,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:23,554 INFO L519 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] [2021-03-10 23:40:23,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-03-10 23:40:23,755 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash -102437964, now seen corresponding path program 134 times [2021-03-10 23:40:23,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:23,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396462502] [2021-03-10 23:40:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:23,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396462502] [2021-03-10 23:40:23,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258281589] [2021-03-10 23:40:23,786 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 [2021-03-10 23:40:23,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:40:23,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:23,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:23,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:23,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:40:23,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814366129] [2021-03-10 23:40:23,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:40:23,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:40:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:40:23,996 INFO L87 Difference]: Start difference. First operand 18795 states and 70378 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) [2021-03-10 23:40:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:24,200 INFO L93 Difference]: Finished difference Result 20889 states and 76457 transitions. [2021-03-10 23:40:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:40:24,201 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 [2021-03-10 23:40:24,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:24,248 INFO L225 Difference]: With dead ends: 20889 [2021-03-10 23:40:24,248 INFO L226 Difference]: Without dead ends: 20847 [2021-03-10 23:40:24,248 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:40:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20847 states. [2021-03-10 23:40:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20847 to 17654. [2021-03-10 23:40:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17654 states, 17653 states have (on average 3.747521667705206) internal successors, (66155), 17653 states have internal predecessors, (66155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17654 states to 17654 states and 66155 transitions. [2021-03-10 23:40:24,590 INFO L78 Accepts]: Start accepts. Automaton has 17654 states and 66155 transitions. Word has length 30 [2021-03-10 23:40:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:24,590 INFO L480 AbstractCegarLoop]: Abstraction has 17654 states and 66155 transitions. [2021-03-10 23:40:24,590 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) [2021-03-10 23:40:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 17654 states and 66155 transitions. [2021-03-10 23:40:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:24,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:24,621 INFO L519 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] [2021-03-10 23:40:24,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-03-10 23:40:24,822 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:24,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1557721912, now seen corresponding path program 135 times [2021-03-10 23:40:24,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:24,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749944262] [2021-03-10 23:40:24,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:24,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749944262] [2021-03-10 23:40:24,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90853798] [2021-03-10 23:40:24,888 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 [2021-03-10 23:40:24,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:40:24,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:24,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:24,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:25,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:25,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-03-10 23:40:25,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226489494] [2021-03-10 23:40:25,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:40:25,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:25,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:40:25,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:40:25,043 INFO L87 Difference]: Start difference. First operand 17654 states and 66155 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) [2021-03-10 23:40:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:26,624 INFO L93 Difference]: Finished difference Result 35150 states and 126078 transitions. [2021-03-10 23:40:26,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-03-10 23:40:26,625 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 [2021-03-10 23:40:26,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:26,709 INFO L225 Difference]: With dead ends: 35150 [2021-03-10 23:40:26,709 INFO L226 Difference]: Without dead ends: 34760 [2021-03-10 23:40:26,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 959.1ms TimeCoverageRelationStatistics Valid=1120, Invalid=4282, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 23:40:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34760 states. [2021-03-10 23:40:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34760 to 24199. [2021-03-10 23:40:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24199 states, 24198 states have (on average 3.7689891726588973) internal successors, (91202), 24198 states have internal predecessors, (91202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24199 states to 24199 states and 91202 transitions. [2021-03-10 23:40:27,385 INFO L78 Accepts]: Start accepts. Automaton has 24199 states and 91202 transitions. Word has length 30 [2021-03-10 23:40:27,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:27,385 INFO L480 AbstractCegarLoop]: Abstraction has 24199 states and 91202 transitions. [2021-03-10 23:40:27,385 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) [2021-03-10 23:40:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand 24199 states and 91202 transitions. [2021-03-10 23:40:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:27,421 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:27,421 INFO L519 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] [2021-03-10 23:40:27,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-03-10 23:40:27,622 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:27,622 INFO L82 PathProgramCache]: Analyzing trace with hash 155608238, now seen corresponding path program 136 times [2021-03-10 23:40:27,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:27,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552351933] [2021-03-10 23:40:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:27,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552351933] [2021-03-10 23:40:27,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979797523] [2021-03-10 23:40:27,658 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 [2021-03-10 23:40:27,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:40:27,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:27,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:27,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:40:27,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:27,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:40:27,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900006042] [2021-03-10 23:40:27,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:40:27,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:27,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:40:27,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:40:27,751 INFO L87 Difference]: Start difference. First operand 24199 states and 91202 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) [2021-03-10 23:40:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:28,026 INFO L93 Difference]: Finished difference Result 40591 states and 149360 transitions. [2021-03-10 23:40:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:40:28,028 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 [2021-03-10 23:40:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:28,282 INFO L225 Difference]: With dead ends: 40591 [2021-03-10 23:40:28,282 INFO L226 Difference]: Without dead ends: 40575 [2021-03-10 23:40:28,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:40:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40575 states. [2021-03-10 23:40:28,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40575 to 31742. [2021-03-10 23:40:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31742 states, 31741 states have (on average 3.814404083047163) internal successors, (121073), 31741 states have internal predecessors, (121073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31742 states to 31742 states and 121073 transitions. [2021-03-10 23:40:29,075 INFO L78 Accepts]: Start accepts. Automaton has 31742 states and 121073 transitions. Word has length 30 [2021-03-10 23:40:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:29,075 INFO L480 AbstractCegarLoop]: Abstraction has 31742 states and 121073 transitions. [2021-03-10 23:40:29,075 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) [2021-03-10 23:40:29,076 INFO L276 IsEmpty]: Start isEmpty. Operand 31742 states and 121073 transitions. [2021-03-10 23:40:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:29,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:29,239 INFO L519 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] [2021-03-10 23:40:29,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:29,449 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:29,450 INFO L82 PathProgramCache]: Analyzing trace with hash -422729102, now seen corresponding path program 137 times [2021-03-10 23:40:29,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:29,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605640557] [2021-03-10 23:40:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:29,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605640557] [2021-03-10 23:40:29,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118836081] [2021-03-10 23:40:29,479 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 [2021-03-10 23:40:29,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:40:29,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:29,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:29,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:40:29,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:29,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:40:29,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608840798] [2021-03-10 23:40:29,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:40:29,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:29,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:40:29,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:40:29,568 INFO L87 Difference]: Start difference. First operand 31742 states and 121073 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) [2021-03-10 23:40:29,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:29,932 INFO L93 Difference]: Finished difference Result 37928 states and 142736 transitions. [2021-03-10 23:40:29,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:40:29,933 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 [2021-03-10 23:40:29,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:30,031 INFO L225 Difference]: With dead ends: 37928 [2021-03-10 23:40:30,031 INFO L226 Difference]: Without dead ends: 37888 [2021-03-10 23:40:30,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:40:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37888 states. [2021-03-10 23:40:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37888 to 32404. [2021-03-10 23:40:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32404 states, 32403 states have (on average 3.8240595006635187) internal successors, (123911), 32403 states have internal predecessors, (123911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32404 states to 32404 states and 123911 transitions. [2021-03-10 23:40:30,891 INFO L78 Accepts]: Start accepts. Automaton has 32404 states and 123911 transitions. Word has length 30 [2021-03-10 23:40:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:30,891 INFO L480 AbstractCegarLoop]: Abstraction has 32404 states and 123911 transitions. [2021-03-10 23:40:30,891 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) [2021-03-10 23:40:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 32404 states and 123911 transitions. [2021-03-10 23:40:30,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:30,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:30,947 INFO L519 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] [2021-03-10 23:40:31,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-03-10 23:40:31,155 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:31,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:31,155 INFO L82 PathProgramCache]: Analyzing trace with hash 736974234, now seen corresponding path program 138 times [2021-03-10 23:40:31,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:31,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502630125] [2021-03-10 23:40:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:40:31,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502630125] [2021-03-10 23:40:31,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558804927] [2021-03-10 23:40:31,315 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 [2021-03-10 23:40:31,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:40:31,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:31,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:31,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:40:31,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:31,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:40:31,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372625702] [2021-03-10 23:40:31,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:40:31,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:31,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:40:31,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:40:31,410 INFO L87 Difference]: Start difference. First operand 32404 states and 123911 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) [2021-03-10 23:40:31,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:31,696 INFO L93 Difference]: Finished difference Result 37636 states and 140480 transitions. [2021-03-10 23:40:31,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:40:31,698 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 [2021-03-10 23:40:31,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:31,892 INFO L225 Difference]: With dead ends: 37636 [2021-03-10 23:40:31,892 INFO L226 Difference]: Without dead ends: 37626 [2021-03-10 23:40:31,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:40:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37626 states. [2021-03-10 23:40:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37626 to 32669. [2021-03-10 23:40:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32669 states, 32668 states have (on average 3.8126300967307456) internal successors, (124551), 32668 states have internal predecessors, (124551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32669 states to 32669 states and 124551 transitions. [2021-03-10 23:40:32,743 INFO L78 Accepts]: Start accepts. Automaton has 32669 states and 124551 transitions. Word has length 30 [2021-03-10 23:40:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:32,743 INFO L480 AbstractCegarLoop]: Abstraction has 32669 states and 124551 transitions. [2021-03-10 23:40:32,743 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) [2021-03-10 23:40:32,743 INFO L276 IsEmpty]: Start isEmpty. Operand 32669 states and 124551 transitions. [2021-03-10 23:40:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:32,811 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:32,811 INFO L519 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] [2021-03-10 23:40:33,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:33,011 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:33,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:33,012 INFO L82 PathProgramCache]: Analyzing trace with hash -638854596, now seen corresponding path program 139 times [2021-03-10 23:40:33,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:33,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982996902] [2021-03-10 23:40:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:40:33,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982996902] [2021-03-10 23:40:33,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098117402] [2021-03-10 23:40:33,048 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 [2021-03-10 23:40:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:33,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:33,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:40:33,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:33,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:40:33,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920821853] [2021-03-10 23:40:33,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:40:33,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:33,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:40:33,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:40:33,141 INFO L87 Difference]: Start difference. First operand 32669 states and 124551 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) [2021-03-10 23:40:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:33,490 INFO L93 Difference]: Finished difference Result 38490 states and 142239 transitions. [2021-03-10 23:40:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:40:33,492 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 [2021-03-10 23:40:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:33,601 INFO L225 Difference]: With dead ends: 38490 [2021-03-10 23:40:33,601 INFO L226 Difference]: Without dead ends: 38400 [2021-03-10 23:40:33,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:40:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38400 states. [2021-03-10 23:40:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38400 to 29176. [2021-03-10 23:40:34,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29176 states, 29175 states have (on average 3.787763496143959) internal successors, (110508), 29175 states have internal predecessors, (110508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29176 states to 29176 states and 110508 transitions. [2021-03-10 23:40:34,596 INFO L78 Accepts]: Start accepts. Automaton has 29176 states and 110508 transitions. Word has length 30 [2021-03-10 23:40:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:34,596 INFO L480 AbstractCegarLoop]: Abstraction has 29176 states and 110508 transitions. [2021-03-10 23:40:34,596 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) [2021-03-10 23:40:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 29176 states and 110508 transitions. [2021-03-10 23:40:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:34,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:34,652 INFO L519 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] [2021-03-10 23:40:34,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-03-10 23:40:34,853 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:34,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:34,853 INFO L82 PathProgramCache]: Analyzing trace with hash 331177430, now seen corresponding path program 140 times [2021-03-10 23:40:34,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:34,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168980342] [2021-03-10 23:40:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:34,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168980342] [2021-03-10 23:40:34,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65320955] [2021-03-10 23:40:34,893 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 [2021-03-10 23:40:34,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:40:34,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:34,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:34,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:34,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 23:40:34,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711335546] [2021-03-10 23:40:34,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:40:34,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:34,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:40:34,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:40:34,989 INFO L87 Difference]: Start difference. First operand 29176 states and 110508 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) [2021-03-10 23:40:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:35,280 INFO L93 Difference]: Finished difference Result 33348 states and 122592 transitions. [2021-03-10 23:40:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:40:35,281 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 [2021-03-10 23:40:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:35,359 INFO L225 Difference]: With dead ends: 33348 [2021-03-10 23:40:35,359 INFO L226 Difference]: Without dead ends: 33334 [2021-03-10 23:40:35,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:40:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33334 states. [2021-03-10 23:40:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33334 to 28570. [2021-03-10 23:40:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28570 states, 28569 states have (on average 3.752458959011516) internal successors, (107204), 28569 states have internal predecessors, (107204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28570 states to 28570 states and 107204 transitions. [2021-03-10 23:40:36,235 INFO L78 Accepts]: Start accepts. Automaton has 28570 states and 107204 transitions. Word has length 30 [2021-03-10 23:40:36,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:36,235 INFO L480 AbstractCegarLoop]: Abstraction has 28570 states and 107204 transitions. [2021-03-10 23:40:36,235 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) [2021-03-10 23:40:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 28570 states and 107204 transitions. [2021-03-10 23:40:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:36,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:36,288 INFO L519 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] [2021-03-10 23:40:36,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable405 [2021-03-10 23:40:36,489 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:36,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:36,489 INFO L82 PathProgramCache]: Analyzing trace with hash 899933846, now seen corresponding path program 141 times [2021-03-10 23:40:36,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:36,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743057484] [2021-03-10 23:40:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:36,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743057484] [2021-03-10 23:40:36,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028260022] [2021-03-10 23:40:36,534 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 [2021-03-10 23:40:36,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:40:36,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:36,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:36,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:36,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:36,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 23:40:36,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064213615] [2021-03-10 23:40:36,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:40:36,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:36,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:40:36,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:40:36,692 INFO L87 Difference]: Start difference. First operand 28570 states and 107204 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) [2021-03-10 23:40:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:38,743 INFO L93 Difference]: Finished difference Result 56316 states and 198950 transitions. [2021-03-10 23:40:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 23:40:38,745 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 [2021-03-10 23:40:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:38,886 INFO L225 Difference]: With dead ends: 56316 [2021-03-10 23:40:38,886 INFO L226 Difference]: Without dead ends: 55451 [2021-03-10 23:40:38,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1031.4ms TimeCoverageRelationStatistics Valid=1112, Invalid=3858, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:40:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55451 states. [2021-03-10 23:40:39,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55451 to 28739. [2021-03-10 23:40:39,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28739 states, 28738 states have (on average 3.70342403785928) internal successors, (106429), 28738 states have internal predecessors, (106429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28739 states to 28739 states and 106429 transitions. [2021-03-10 23:40:39,761 INFO L78 Accepts]: Start accepts. Automaton has 28739 states and 106429 transitions. Word has length 30 [2021-03-10 23:40:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:39,761 INFO L480 AbstractCegarLoop]: Abstraction has 28739 states and 106429 transitions. [2021-03-10 23:40:39,761 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) [2021-03-10 23:40:39,761 INFO L276 IsEmpty]: Start isEmpty. Operand 28739 states and 106429 transitions. [2021-03-10 23:40:39,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:39,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:39,813 INFO L519 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] [2021-03-10 23:40:40,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:40,014 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1381936088, now seen corresponding path program 142 times [2021-03-10 23:40:40,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:40,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647851263] [2021-03-10 23:40:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:40:40,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647851263] [2021-03-10 23:40:40,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532261455] [2021-03-10 23:40:40,053 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 [2021-03-10 23:40:40,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:40:40,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:40,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:40:40,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:40,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 23:40:40,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580277579] [2021-03-10 23:40:40,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:40:40,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:40,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:40:40,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:40:40,177 INFO L87 Difference]: Start difference. First operand 28739 states and 106429 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) [2021-03-10 23:40:41,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:41,453 INFO L93 Difference]: Finished difference Result 46475 states and 165376 transitions. [2021-03-10 23:40:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 23:40:41,454 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 [2021-03-10 23:40:41,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:41,772 INFO L225 Difference]: With dead ends: 46475 [2021-03-10 23:40:41,772 INFO L226 Difference]: Without dead ends: 46300 [2021-03-10 23:40:41,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 654.2ms TimeCoverageRelationStatistics Valid=669, Invalid=2301, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:40:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46300 states. [2021-03-10 23:40:42,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46300 to 30596. [2021-03-10 23:40:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30596 states, 30595 states have (on average 3.7184507272430136) internal successors, (113766), 30595 states have internal predecessors, (113766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30596 states to 30596 states and 113766 transitions. [2021-03-10 23:40:42,588 INFO L78 Accepts]: Start accepts. Automaton has 30596 states and 113766 transitions. Word has length 30 [2021-03-10 23:40:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:42,588 INFO L480 AbstractCegarLoop]: Abstraction has 30596 states and 113766 transitions. [2021-03-10 23:40:42,588 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) [2021-03-10 23:40:42,588 INFO L276 IsEmpty]: Start isEmpty. Operand 30596 states and 113766 transitions. [2021-03-10 23:40:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:42,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:42,635 INFO L519 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] [2021-03-10 23:40:42,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-03-10 23:40:42,837 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1418419144, now seen corresponding path program 143 times [2021-03-10 23:40:42,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:42,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045049699] [2021-03-10 23:40:42,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:40:42,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045049699] [2021-03-10 23:40:42,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198600308] [2021-03-10 23:40:42,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:42,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:40:42,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:42,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:40:42,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:40:42,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:42,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:40:42,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567828399] [2021-03-10 23:40:42,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:40:42,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:42,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:40:42,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:40:42,971 INFO L87 Difference]: Start difference. First operand 30596 states and 113766 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) [2021-03-10 23:40:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:43,292 INFO L93 Difference]: Finished difference Result 39015 states and 143204 transitions. [2021-03-10 23:40:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:40:43,294 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 [2021-03-10 23:40:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:43,389 INFO L225 Difference]: With dead ends: 39015 [2021-03-10 23:40:43,390 INFO L226 Difference]: Without dead ends: 38978 [2021-03-10 23:40:43,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:40:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38978 states. [2021-03-10 23:40:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38978 to 35764. [2021-03-10 23:40:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35764 states, 35763 states have (on average 3.73553672790314) internal successors, (133594), 35763 states have internal predecessors, (133594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35764 states to 35764 states and 133594 transitions. [2021-03-10 23:40:44,237 INFO L78 Accepts]: Start accepts. Automaton has 35764 states and 133594 transitions. Word has length 30 [2021-03-10 23:40:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:44,237 INFO L480 AbstractCegarLoop]: Abstraction has 35764 states and 133594 transitions. [2021-03-10 23:40:44,237 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) [2021-03-10 23:40:44,237 INFO L276 IsEmpty]: Start isEmpty. Operand 35764 states and 133594 transitions. [2021-03-10 23:40:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:44,289 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:44,289 INFO L519 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] [2021-03-10 23:40:44,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:44,489 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:44,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:44,490 INFO L82 PathProgramCache]: Analyzing trace with hash -198212408, now seen corresponding path program 144 times [2021-03-10 23:40:44,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:44,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903370752] [2021-03-10 23:40:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:40:44,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903370752] [2021-03-10 23:40:44,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418170850] [2021-03-10 23:40:44,524 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 [2021-03-10 23:40:44,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:40:44,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:44,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:44,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:40:44,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:44,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 23:40:44,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964179640] [2021-03-10 23:40:44,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:40:44,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:44,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:40:44,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:40:44,642 INFO L87 Difference]: Start difference. First operand 35764 states and 133594 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) [2021-03-10 23:40:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:46,168 INFO L93 Difference]: Finished difference Result 52051 states and 181857 transitions. [2021-03-10 23:40:46,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 23:40:46,170 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 [2021-03-10 23:40:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:46,298 INFO L225 Difference]: With dead ends: 52051 [2021-03-10 23:40:46,298 INFO L226 Difference]: Without dead ends: 51955 [2021-03-10 23:40:46,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 783.4ms TimeCoverageRelationStatistics Valid=948, Invalid=3474, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:40:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51955 states. [2021-03-10 23:40:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51955 to 33691. [2021-03-10 23:40:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33691 states, 33690 states have (on average 3.7114870881567232) internal successors, (125040), 33690 states have internal predecessors, (125040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33691 states to 33691 states and 125040 transitions. [2021-03-10 23:40:47,247 INFO L78 Accepts]: Start accepts. Automaton has 33691 states and 125040 transitions. Word has length 30 [2021-03-10 23:40:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:47,247 INFO L480 AbstractCegarLoop]: Abstraction has 33691 states and 125040 transitions. [2021-03-10 23:40:47,247 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) [2021-03-10 23:40:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 33691 states and 125040 transitions. [2021-03-10 23:40:47,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:47,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:47,299 INFO L519 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] [2021-03-10 23:40:47,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:47,499 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:47,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:47,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1470112996, now seen corresponding path program 145 times [2021-03-10 23:40:47,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:47,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735941182] [2021-03-10 23:40:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:47,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735941182] [2021-03-10 23:40:47,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780271763] [2021-03-10 23:40:47,542 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 [2021-03-10 23:40:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:47,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:40:47,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:47,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-03-10 23:40:47,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691921510] [2021-03-10 23:40:47,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:40:47,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:47,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:40:47,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:40:47,672 INFO L87 Difference]: Start difference. First operand 33691 states and 125040 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) [2021-03-10 23:40:49,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:49,466 INFO L93 Difference]: Finished difference Result 49859 states and 171603 transitions. [2021-03-10 23:40:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 23:40:49,468 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 [2021-03-10 23:40:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:49,598 INFO L225 Difference]: With dead ends: 49859 [2021-03-10 23:40:49,598 INFO L226 Difference]: Without dead ends: 49546 [2021-03-10 23:40:49,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 916.0ms TimeCoverageRelationStatistics Valid=1199, Invalid=3771, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:40:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49546 states. [2021-03-10 23:40:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49546 to 33552. [2021-03-10 23:40:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33552 states, 33551 states have (on average 3.68659652469375) internal successors, (123689), 33551 states have internal predecessors, (123689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33552 states to 33552 states and 123689 transitions. [2021-03-10 23:40:50,762 INFO L78 Accepts]: Start accepts. Automaton has 33552 states and 123689 transitions. Word has length 30 [2021-03-10 23:40:50,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:50,762 INFO L480 AbstractCegarLoop]: Abstraction has 33552 states and 123689 transitions. [2021-03-10 23:40:50,762 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) [2021-03-10 23:40:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33552 states and 123689 transitions. [2021-03-10 23:40:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:50,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:50,822 INFO L519 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] [2021-03-10 23:40:51,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-03-10 23:40:51,022 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:51,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:51,022 INFO L82 PathProgramCache]: Analyzing trace with hash -415712398, now seen corresponding path program 146 times [2021-03-10 23:40:51,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:51,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399968136] [2021-03-10 23:40:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:51,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399968136] [2021-03-10 23:40:51,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716934592] [2021-03-10 23:40:51,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:51,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:40:51,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:51,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:51,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:40:51,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:51,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 23:40:51,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680600518] [2021-03-10 23:40:51,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:40:51,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:51,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:40:51,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:40:51,189 INFO L87 Difference]: Start difference. First operand 33552 states and 123689 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) [2021-03-10 23:40:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:51,570 INFO L93 Difference]: Finished difference Result 36653 states and 132678 transitions. [2021-03-10 23:40:51,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:40:51,572 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 [2021-03-10 23:40:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:51,684 INFO L225 Difference]: With dead ends: 36653 [2021-03-10 23:40:51,684 INFO L226 Difference]: Without dead ends: 36496 [2021-03-10 23:40:51,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:40:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36496 states. [2021-03-10 23:40:52,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36496 to 33265. [2021-03-10 23:40:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33265 states, 33264 states have (on average 3.6913480038480038) internal successors, (122789), 33264 states have internal predecessors, (122789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33265 states to 33265 states and 122789 transitions. [2021-03-10 23:40:52,527 INFO L78 Accepts]: Start accepts. Automaton has 33265 states and 122789 transitions. Word has length 30 [2021-03-10 23:40:52,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:52,527 INFO L480 AbstractCegarLoop]: Abstraction has 33265 states and 122789 transitions. [2021-03-10 23:40:52,527 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) [2021-03-10 23:40:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 33265 states and 122789 transitions. [2021-03-10 23:40:52,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:52,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:52,584 INFO L519 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] [2021-03-10 23:40:52,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-03-10 23:40:52,785 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:52,785 INFO L82 PathProgramCache]: Analyzing trace with hash -947319082, now seen corresponding path program 147 times [2021-03-10 23:40:52,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:52,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554017661] [2021-03-10 23:40:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:40:52,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554017661] [2021-03-10 23:40:52,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489230808] [2021-03-10 23:40:52,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:52,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:40:52,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:52,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:52,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:52,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:52,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 23:40:52,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690489865] [2021-03-10 23:40:52,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:40:52,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:52,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:40:52,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:40:52,934 INFO L87 Difference]: Start difference. First operand 33265 states and 122789 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) [2021-03-10 23:40:53,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:53,255 INFO L93 Difference]: Finished difference Result 41999 states and 149151 transitions. [2021-03-10 23:40:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:40:53,256 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 [2021-03-10 23:40:53,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:53,351 INFO L225 Difference]: With dead ends: 41999 [2021-03-10 23:40:53,351 INFO L226 Difference]: Without dead ends: 41949 [2021-03-10 23:40:53,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:40:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41949 states. [2021-03-10 23:40:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41949 to 33014. [2021-03-10 23:40:54,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33014 states, 33013 states have (on average 3.678520582800715) internal successors, (121439), 33013 states have internal predecessors, (121439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33014 states to 33014 states and 121439 transitions. [2021-03-10 23:40:54,153 INFO L78 Accepts]: Start accepts. Automaton has 33014 states and 121439 transitions. Word has length 30 [2021-03-10 23:40:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:54,153 INFO L480 AbstractCegarLoop]: Abstraction has 33014 states and 121439 transitions. [2021-03-10 23:40:54,153 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) [2021-03-10 23:40:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 33014 states and 121439 transitions. [2021-03-10 23:40:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:54,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:54,202 INFO L519 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] [2021-03-10 23:40:54,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-03-10 23:40:54,403 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:54,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:54,403 INFO L82 PathProgramCache]: Analyzing trace with hash -88577934, now seen corresponding path program 148 times [2021-03-10 23:40:54,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:54,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467586600] [2021-03-10 23:40:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:54,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467586600] [2021-03-10 23:40:54,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801315688] [2021-03-10 23:40:54,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:54,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:40:54,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:54,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:54,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:40:54,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:54,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:40:54,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759051164] [2021-03-10 23:40:54,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:40:54,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:54,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:40:54,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:40:54,553 INFO L87 Difference]: Start difference. First operand 33014 states and 121439 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) [2021-03-10 23:40:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:54,891 INFO L93 Difference]: Finished difference Result 40522 states and 147319 transitions. [2021-03-10 23:40:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:40:54,893 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 [2021-03-10 23:40:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:54,992 INFO L225 Difference]: With dead ends: 40522 [2021-03-10 23:40:54,992 INFO L226 Difference]: Without dead ends: 40469 [2021-03-10 23:40:54,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:40:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40469 states. [2021-03-10 23:40:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40469 to 37749. [2021-03-10 23:40:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37749 states, 37748 states have (on average 3.700010596587899) internal successors, (139668), 37748 states have internal predecessors, (139668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37749 states to 37749 states and 139668 transitions. [2021-03-10 23:40:56,043 INFO L78 Accepts]: Start accepts. Automaton has 37749 states and 139668 transitions. Word has length 30 [2021-03-10 23:40:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:56,043 INFO L480 AbstractCegarLoop]: Abstraction has 37749 states and 139668 transitions. [2021-03-10 23:40:56,044 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) [2021-03-10 23:40:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 37749 states and 139668 transitions. [2021-03-10 23:40:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:56,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:56,103 INFO L519 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] [2021-03-10 23:40:56,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-03-10 23:40:56,304 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:56,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:56,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1071125402, now seen corresponding path program 149 times [2021-03-10 23:40:56,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:56,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985709974] [2021-03-10 23:40:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:40:56,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985709974] [2021-03-10 23:40:56,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682812644] [2021-03-10 23:40:56,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:56,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:40:56,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:56,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:40:56,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:40:56,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:56,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:40:56,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290445460] [2021-03-10 23:40:56,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:40:56,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:56,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:40:56,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:40:56,438 INFO L87 Difference]: Start difference. First operand 37749 states and 139668 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) [2021-03-10 23:40:57,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:57,030 INFO L93 Difference]: Finished difference Result 42090 states and 152810 transitions. [2021-03-10 23:40:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:40:57,032 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 [2021-03-10 23:40:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:57,133 INFO L225 Difference]: With dead ends: 42090 [2021-03-10 23:40:57,134 INFO L226 Difference]: Without dead ends: 42080 [2021-03-10 23:40:57,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:40:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42080 states. [2021-03-10 23:40:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42080 to 37886. [2021-03-10 23:40:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37886 states, 37885 states have (on average 3.698403061897849) internal successors, (140114), 37885 states have internal predecessors, (140114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37886 states to 37886 states and 140114 transitions. [2021-03-10 23:40:58,136 INFO L78 Accepts]: Start accepts. Automaton has 37886 states and 140114 transitions. Word has length 30 [2021-03-10 23:40:58,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:58,136 INFO L480 AbstractCegarLoop]: Abstraction has 37886 states and 140114 transitions. [2021-03-10 23:40:58,136 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) [2021-03-10 23:40:58,136 INFO L276 IsEmpty]: Start isEmpty. Operand 37886 states and 140114 transitions. [2021-03-10 23:40:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:58,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:58,206 INFO L519 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] [2021-03-10 23:40:58,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-03-10 23:40:58,411 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:58,411 INFO L82 PathProgramCache]: Analyzing trace with hash 665328598, now seen corresponding path program 150 times [2021-03-10 23:40:58,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:58,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786644410] [2021-03-10 23:40:58,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:40:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786644410] [2021-03-10 23:40:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638148801] [2021-03-10 23:40:58,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:58,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:40:58,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:58,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:40:58,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:58,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:58,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-03-10 23:40:58,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935357406] [2021-03-10 23:40:58,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:40:58,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:40:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:40:58,617 INFO L87 Difference]: Start difference. First operand 37886 states and 140114 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) [2021-03-10 23:41:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:00,278 INFO L93 Difference]: Finished difference Result 72027 states and 252284 transitions. [2021-03-10 23:41:00,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 23:41:00,279 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 [2021-03-10 23:41:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:00,460 INFO L225 Difference]: With dead ends: 72027 [2021-03-10 23:41:00,461 INFO L226 Difference]: Without dead ends: 71252 [2021-03-10 23:41:00,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 916.6ms TimeCoverageRelationStatistics Valid=1029, Invalid=3663, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 23:41:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71252 states. [2021-03-10 23:41:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71252 to 44321. [2021-03-10 23:41:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44321 states, 44320 states have (on average 3.6700361010830327) internal successors, (162656), 44320 states have internal predecessors, (162656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44321 states to 44321 states and 162656 transitions. [2021-03-10 23:41:01,846 INFO L78 Accepts]: Start accepts. Automaton has 44321 states and 162656 transitions. Word has length 30 [2021-03-10 23:41:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:01,847 INFO L480 AbstractCegarLoop]: Abstraction has 44321 states and 162656 transitions. [2021-03-10 23:41:01,847 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) [2021-03-10 23:41:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 44321 states and 162656 transitions. [2021-03-10 23:41:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:01,913 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:01,913 INFO L519 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] [2021-03-10 23:41:02,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-03-10 23:41:02,113 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:02,114 INFO L82 PathProgramCache]: Analyzing trace with hash -536421578, now seen corresponding path program 151 times [2021-03-10 23:41:02,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:02,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533675639] [2021-03-10 23:41:02,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:41:02,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533675639] [2021-03-10 23:41:02,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898122365] [2021-03-10 23:41:02,162 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 [2021-03-10 23:41:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:02,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:41:02,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:02,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 23:41:02,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751552985] [2021-03-10 23:41:02,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:41:02,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:02,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:41:02,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:41:02,299 INFO L87 Difference]: Start difference. First operand 44321 states and 162656 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) [2021-03-10 23:41:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:02,778 INFO L93 Difference]: Finished difference Result 61736 states and 222053 transitions. [2021-03-10 23:41:02,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:41:02,779 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 [2021-03-10 23:41:02,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:02,939 INFO L225 Difference]: With dead ends: 61736 [2021-03-10 23:41:02,939 INFO L226 Difference]: Without dead ends: 61638 [2021-03-10 23:41:02,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:41:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61638 states. [2021-03-10 23:41:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61638 to 53354. [2021-03-10 23:41:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53354 states, 53353 states have (on average 3.69981069480629) internal successors, (197396), 53353 states have internal predecessors, (197396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53354 states to 53354 states and 197396 transitions. [2021-03-10 23:41:04,187 INFO L78 Accepts]: Start accepts. Automaton has 53354 states and 197396 transitions. Word has length 30 [2021-03-10 23:41:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:04,188 INFO L480 AbstractCegarLoop]: Abstraction has 53354 states and 197396 transitions. [2021-03-10 23:41:04,188 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) [2021-03-10 23:41:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 53354 states and 197396 transitions. [2021-03-10 23:41:04,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:04,259 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:04,259 INFO L519 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] [2021-03-10 23:41:04,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:04,459 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1862300086, now seen corresponding path program 152 times [2021-03-10 23:41:04,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:04,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483898714] [2021-03-10 23:41:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:04,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483898714] [2021-03-10 23:41:04,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166972349] [2021-03-10 23:41:04,490 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 [2021-03-10 23:41:04,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:41:04,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:04,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:04,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:41:04,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:04,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:41:04,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761908564] [2021-03-10 23:41:04,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:41:04,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:04,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:41:04,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:41:04,583 INFO L87 Difference]: Start difference. First operand 53354 states and 197396 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) [2021-03-10 23:41:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:05,274 INFO L93 Difference]: Finished difference Result 63046 states and 226289 transitions. [2021-03-10 23:41:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:41:05,275 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 [2021-03-10 23:41:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:05,431 INFO L225 Difference]: With dead ends: 63046 [2021-03-10 23:41:05,432 INFO L226 Difference]: Without dead ends: 63030 [2021-03-10 23:41:05,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:41:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63030 states. [2021-03-10 23:41:06,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63030 to 53378. [2021-03-10 23:41:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53378 states, 53377 states have (on average 3.696254941266838) internal successors, (197295), 53377 states have internal predecessors, (197295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53378 states to 53378 states and 197295 transitions. [2021-03-10 23:41:06,608 INFO L78 Accepts]: Start accepts. Automaton has 53378 states and 197295 transitions. Word has length 30 [2021-03-10 23:41:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:06,608 INFO L480 AbstractCegarLoop]: Abstraction has 53378 states and 197295 transitions. [2021-03-10 23:41:06,608 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) [2021-03-10 23:41:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 53378 states and 197295 transitions. [2021-03-10 23:41:06,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:06,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:06,678 INFO L519 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] [2021-03-10 23:41:06,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-03-10 23:41:06,878 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:06,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:06,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1533523770, now seen corresponding path program 153 times [2021-03-10 23:41:06,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:06,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108211339] [2021-03-10 23:41:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:06,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108211339] [2021-03-10 23:41:06,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933980945] [2021-03-10 23:41:06,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:06,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:41:06,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:06,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:06,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:07,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:07,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 23:41:07,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572865350] [2021-03-10 23:41:07,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:41:07,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:07,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:41:07,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:41:07,012 INFO L87 Difference]: Start difference. First operand 53378 states and 197295 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) [2021-03-10 23:41:07,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:07,442 INFO L93 Difference]: Finished difference Result 60994 states and 219624 transitions. [2021-03-10 23:41:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:41:07,443 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 [2021-03-10 23:41:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:07,948 INFO L225 Difference]: With dead ends: 60994 [2021-03-10 23:41:07,948 INFO L226 Difference]: Without dead ends: 60864 [2021-03-10 23:41:07,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:41:08,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60864 states. [2021-03-10 23:41:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60864 to 54078. [2021-03-10 23:41:08,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54078 states, 54077 states have (on average 3.6848567782976125) internal successors, (199266), 54077 states have internal predecessors, (199266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54078 states to 54078 states and 199266 transitions. [2021-03-10 23:41:09,306 INFO L78 Accepts]: Start accepts. Automaton has 54078 states and 199266 transitions. Word has length 30 [2021-03-10 23:41:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:09,306 INFO L480 AbstractCegarLoop]: Abstraction has 54078 states and 199266 transitions. [2021-03-10 23:41:09,306 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) [2021-03-10 23:41:09,306 INFO L276 IsEmpty]: Start isEmpty. Operand 54078 states and 199266 transitions. [2021-03-10 23:41:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:09,379 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:09,379 INFO L519 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] [2021-03-10 23:41:09,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:09,579 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:09,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1777851450, now seen corresponding path program 154 times [2021-03-10 23:41:09,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:09,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188202505] [2021-03-10 23:41:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:09,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188202505] [2021-03-10 23:41:09,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555444793] [2021-03-10 23:41:09,627 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 [2021-03-10 23:41:09,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:41:09,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:09,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:41:09,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:09,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:09,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-03-10 23:41:09,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826256810] [2021-03-10 23:41:09,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:41:09,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:09,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:41:09,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:41:09,722 INFO L87 Difference]: Start difference. First operand 54078 states and 199266 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) [2021-03-10 23:41:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:10,161 INFO L93 Difference]: Finished difference Result 56533 states and 205825 transitions. [2021-03-10 23:41:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:41:10,162 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 [2021-03-10 23:41:10,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:10,302 INFO L225 Difference]: With dead ends: 56533 [2021-03-10 23:41:10,302 INFO L226 Difference]: Without dead ends: 56372 [2021-03-10 23:41:10,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:41:10,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56372 states. [2021-03-10 23:41:11,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56372 to 51797. [2021-03-10 23:41:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51797 states, 51796 states have (on average 3.7008070121244883) internal successors, (191687), 51796 states have internal predecessors, (191687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51797 states to 51797 states and 191687 transitions. [2021-03-10 23:41:11,420 INFO L78 Accepts]: Start accepts. Automaton has 51797 states and 191687 transitions. Word has length 30 [2021-03-10 23:41:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:11,420 INFO L480 AbstractCegarLoop]: Abstraction has 51797 states and 191687 transitions. [2021-03-10 23:41:11,420 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) [2021-03-10 23:41:11,420 INFO L276 IsEmpty]: Start isEmpty. Operand 51797 states and 191687 transitions. [2021-03-10 23:41:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:11,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:11,487 INFO L519 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] [2021-03-10 23:41:11,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:11,688 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:11,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1134016742, now seen corresponding path program 155 times [2021-03-10 23:41:11,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:11,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260378692] [2021-03-10 23:41:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:11,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260378692] [2021-03-10 23:41:11,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217565949] [2021-03-10 23:41:11,729 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 [2021-03-10 23:41:11,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:41:11,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:11,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:11,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:11,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:11,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 23:41:11,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844968154] [2021-03-10 23:41:11,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:41:11,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:11,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:41:11,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:41:11,831 INFO L87 Difference]: Start difference. First operand 51797 states and 191687 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) [2021-03-10 23:41:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:12,513 INFO L93 Difference]: Finished difference Result 57739 states and 209229 transitions. [2021-03-10 23:41:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:41:12,514 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 [2021-03-10 23:41:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:12,658 INFO L225 Difference]: With dead ends: 57739 [2021-03-10 23:41:12,658 INFO L226 Difference]: Without dead ends: 57725 [2021-03-10 23:41:12,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:41:12,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57725 states. [2021-03-10 23:41:13,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57725 to 46698. [2021-03-10 23:41:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46698 states, 46697 states have (on average 3.6758249994646337) internal successors, (171650), 46697 states have internal predecessors, (171650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46698 states to 46698 states and 171650 transitions. [2021-03-10 23:41:13,761 INFO L78 Accepts]: Start accepts. Automaton has 46698 states and 171650 transitions. Word has length 30 [2021-03-10 23:41:13,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:13,761 INFO L480 AbstractCegarLoop]: Abstraction has 46698 states and 171650 transitions. [2021-03-10 23:41:13,761 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) [2021-03-10 23:41:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 46698 states and 171650 transitions. [2021-03-10 23:41:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:13,828 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:13,828 INFO L519 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] [2021-03-10 23:41:14,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-03-10 23:41:14,028 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:14,028 INFO L82 PathProgramCache]: Analyzing trace with hash 770710102, now seen corresponding path program 156 times [2021-03-10 23:41:14,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:14,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495375941] [2021-03-10 23:41:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:14,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495375941] [2021-03-10 23:41:14,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65318915] [2021-03-10 23:41:14,069 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 [2021-03-10 23:41:14,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:41:14,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:14,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:14,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:41:14,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:14,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 23:41:14,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700965750] [2021-03-10 23:41:14,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:41:14,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:14,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:41:14,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:41:14,163 INFO L87 Difference]: Start difference. First operand 46698 states and 171650 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) [2021-03-10 23:41:14,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:14,582 INFO L93 Difference]: Finished difference Result 50463 states and 182438 transitions. [2021-03-10 23:41:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:41:14,583 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 [2021-03-10 23:41:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:14,711 INFO L225 Difference]: With dead ends: 50463 [2021-03-10 23:41:14,711 INFO L226 Difference]: Without dead ends: 50316 [2021-03-10 23:41:14,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:41:14,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50316 states. [2021-03-10 23:41:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50316 to 46418. [2021-03-10 23:41:15,608 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) [2021-03-10 23:41:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46418 states to 46418 states and 170725 transitions. [2021-03-10 23:41:15,728 INFO L78 Accepts]: Start accepts. Automaton has 46418 states and 170725 transitions. Word has length 30 [2021-03-10 23:41:15,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:15,728 INFO L480 AbstractCegarLoop]: Abstraction has 46418 states and 170725 transitions. [2021-03-10 23:41:15,728 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) [2021-03-10 23:41:15,728 INFO L276 IsEmpty]: Start isEmpty. Operand 46418 states and 170725 transitions. [2021-03-10 23:41:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:15,788 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:15,788 INFO L519 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] [2021-03-10 23:41:15,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-03-10 23:41:15,989 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:15,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1609551026, now seen corresponding path program 157 times [2021-03-10 23:41:15,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:15,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221384107] [2021-03-10 23:41:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:16,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221384107] [2021-03-10 23:41:16,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893226713] [2021-03-10 23:41:16,039 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 [2021-03-10 23:41:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:16,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:41:16,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:41:16,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:16,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-03-10 23:41:16,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560872094] [2021-03-10 23:41:16,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:41:16,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:16,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:41:16,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:41:16,138 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) [2021-03-10 23:41:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:16,557 INFO L93 Difference]: Finished difference Result 49897 states and 180569 transitions. [2021-03-10 23:41:16,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:41:16,559 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 [2021-03-10 23:41:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:16,676 INFO L225 Difference]: With dead ends: 49897 [2021-03-10 23:41:16,676 INFO L226 Difference]: Without dead ends: 49814 [2021-03-10 23:41:16,676 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:41:16,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49814 states. [2021-03-10 23:41:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49814 to 46037. [2021-03-10 23:41:17,625 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) [2021-03-10 23:41:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46037 states to 46037 states and 169432 transitions. [2021-03-10 23:41:17,748 INFO L78 Accepts]: Start accepts. Automaton has 46037 states and 169432 transitions. Word has length 30 [2021-03-10 23:41:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:17,749 INFO L480 AbstractCegarLoop]: Abstraction has 46037 states and 169432 transitions. [2021-03-10 23:41:17,749 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) [2021-03-10 23:41:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 46037 states and 169432 transitions. [2021-03-10 23:41:17,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:17,810 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:17,810 INFO L519 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] [2021-03-10 23:41:18,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-03-10 23:41:18,010 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:18,011 INFO L82 PathProgramCache]: Analyzing trace with hash -595123178, now seen corresponding path program 158 times [2021-03-10 23:41:18,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:18,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365476602] [2021-03-10 23:41:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:18,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365476602] [2021-03-10 23:41:18,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508549159] [2021-03-10 23:41:18,041 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 [2021-03-10 23:41:18,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:41:18,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:41:18,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:18,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:41:18,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985375671] [2021-03-10 23:41:18,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:41:18,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:18,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:41:18,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:41:18,128 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) [2021-03-10 23:41:18,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:18,697 INFO L93 Difference]: Finished difference Result 58034 states and 211506 transitions. [2021-03-10 23:41:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:41:18,698 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 [2021-03-10 23:41:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:18,836 INFO L225 Difference]: With dead ends: 58034 [2021-03-10 23:41:18,836 INFO L226 Difference]: Without dead ends: 57997 [2021-03-10 23:41:18,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:41:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57997 states. [2021-03-10 23:41:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57997 to 54511. [2021-03-10 23:41:19,883 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) [2021-03-10 23:41:20,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54511 states to 54511 states and 201814 transitions. [2021-03-10 23:41:20,067 INFO L78 Accepts]: Start accepts. Automaton has 54511 states and 201814 transitions. Word has length 30 [2021-03-10 23:41:20,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:20,067 INFO L480 AbstractCegarLoop]: Abstraction has 54511 states and 201814 transitions. [2021-03-10 23:41:20,067 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) [2021-03-10 23:41:20,067 INFO L276 IsEmpty]: Start isEmpty. Operand 54511 states and 201814 transitions. [2021-03-10 23:41:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:20,146 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:20,147 INFO L519 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] [2021-03-10 23:41:20,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-03-10 23:41:20,347 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:20,347 INFO L82 PathProgramCache]: Analyzing trace with hash 368942536, now seen corresponding path program 159 times [2021-03-10 23:41:20,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:20,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024069259] [2021-03-10 23:41:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:20,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024069259] [2021-03-10 23:41:20,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817138178] [2021-03-10 23:41:20,405 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 [2021-03-10 23:41:20,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:41:20,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:20,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 23:41:20,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:20,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-03-10 23:41:20,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013631373] [2021-03-10 23:41:20,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:41:20,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:20,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:41:20,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:41:20,535 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) [2021-03-10 23:41:22,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:22,420 INFO L93 Difference]: Finished difference Result 76071 states and 270587 transitions. [2021-03-10 23:41:22,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 23:41:22,422 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 [2021-03-10 23:41:22,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:22,607 INFO L225 Difference]: With dead ends: 76071 [2021-03-10 23:41:22,608 INFO L226 Difference]: Without dead ends: 76017 [2021-03-10 23:41:22,608 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 849.7ms TimeCoverageRelationStatistics Valid=900, Invalid=3132, Unknown=0, NotChecked=0, Total=4032 [2021-03-10 23:41:22,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76017 states. [2021-03-10 23:41:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76017 to 61077. [2021-03-10 23:41:23,795 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) [2021-03-10 23:41:23,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61077 states to 61077 states and 226905 transitions. [2021-03-10 23:41:23,970 INFO L78 Accepts]: Start accepts. Automaton has 61077 states and 226905 transitions. Word has length 30 [2021-03-10 23:41:23,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:23,970 INFO L480 AbstractCegarLoop]: Abstraction has 61077 states and 226905 transitions. [2021-03-10 23:41:23,970 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) [2021-03-10 23:41:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 61077 states and 226905 transitions. [2021-03-10 23:41:24,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:24,065 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:24,065 INFO L519 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] [2021-03-10 23:41:24,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:24,267 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:24,267 INFO L82 PathProgramCache]: Analyzing trace with hash 361087944, now seen corresponding path program 160 times [2021-03-10 23:41:24,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:24,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527455776] [2021-03-10 23:41:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:24,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527455776] [2021-03-10 23:41:24,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255657577] [2021-03-10 23:41:24,299 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 [2021-03-10 23:41:24,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:41:24,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:24,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:24,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:41:24,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:24,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 23:41:24,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122683414] [2021-03-10 23:41:24,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:41:24,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:24,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:41:24,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:41:24,398 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) [2021-03-10 23:41:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:24,842 INFO L93 Difference]: Finished difference Result 69205 states and 252584 transitions. [2021-03-10 23:41:24,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:41:24,843 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 [2021-03-10 23:41:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:25,410 INFO L225 Difference]: With dead ends: 69205 [2021-03-10 23:41:25,410 INFO L226 Difference]: Without dead ends: 69181 [2021-03-10 23:41:25,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:41:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69181 states. [2021-03-10 23:41:26,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69181 to 61746. [2021-03-10 23:41:26,614 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) [2021-03-10 23:41:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61746 states to 61746 states and 229035 transitions. [2021-03-10 23:41:26,836 INFO L78 Accepts]: Start accepts. Automaton has 61746 states and 229035 transitions. Word has length 30 [2021-03-10 23:41:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:26,837 INFO L480 AbstractCegarLoop]: Abstraction has 61746 states and 229035 transitions. [2021-03-10 23:41:26,837 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) [2021-03-10 23:41:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 61746 states and 229035 transitions. [2021-03-10 23:41:26,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:26,944 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:26,944 INFO L519 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] [2021-03-10 23:41:27,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-03-10 23:41:27,144 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:27,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:27,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1851937992, now seen corresponding path program 161 times [2021-03-10 23:41:27,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:27,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535606860] [2021-03-10 23:41:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:27,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535606860] [2021-03-10 23:41:27,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508269984] [2021-03-10 23:41:27,187 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 [2021-03-10 23:41:27,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:41:27,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:27,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:27,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:27,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:27,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 23:41:27,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3705532] [2021-03-10 23:41:27,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:41:27,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:27,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:41:27,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:41:27,286 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) [2021-03-10 23:41:27,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:27,735 INFO L93 Difference]: Finished difference Result 68985 states and 251648 transitions. [2021-03-10 23:41:27,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:41:27,737 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 [2021-03-10 23:41:27,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:27,909 INFO L225 Difference]: With dead ends: 68985 [2021-03-10 23:41:27,909 INFO L226 Difference]: Without dead ends: 68907 [2021-03-10 23:41:27,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:41:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68907 states. [2021-03-10 23:41:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68907 to 61549. [2021-03-10 23:41:29,110 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) [2021-03-10 23:41:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61549 states to 61549 states and 227939 transitions. [2021-03-10 23:41:29,638 INFO L78 Accepts]: Start accepts. Automaton has 61549 states and 227939 transitions. Word has length 30 [2021-03-10 23:41:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:29,638 INFO L480 AbstractCegarLoop]: Abstraction has 61549 states and 227939 transitions. [2021-03-10 23:41:29,638 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) [2021-03-10 23:41:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 61549 states and 227939 transitions. [2021-03-10 23:41:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:41:29,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:29,755 INFO L519 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] [2021-03-10 23:41:29,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-03-10 23:41:29,956 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:29,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:29,956 INFO L82 PathProgramCache]: Analyzing trace with hash 239147384, now seen corresponding path program 162 times [2021-03-10 23:41:29,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:29,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348146328] [2021-03-10 23:41:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:41:29,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348146328] [2021-03-10 23:41:29,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477846850] [2021-03-10 23:41:29,989 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 [2021-03-10 23:41:30,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:41:30,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:30,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:41:30,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:41:30,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:30,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:41:30,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214600228] [2021-03-10 23:41:30,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:41:30,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:30,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:41:30,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:41:30,092 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) [2021-03-10 23:41:30,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:30,580 INFO L93 Difference]: Finished difference Result 87148 states and 316679 transitions. [2021-03-10 23:41:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:41:30,581 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 [2021-03-10 23:41:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:30,790 INFO L225 Difference]: With dead ends: 87148 [2021-03-10 23:41:30,790 INFO L226 Difference]: Without dead ends: 87117 [2021-03-10 23:41:30,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:41:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87117 states. [2021-03-10 23:41:32,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87117 to 74655. [2021-03-10 23:41:32,242 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) [2021-03-10 23:41:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74655 states to 74655 states and 277467 transitions. [2021-03-10 23:41:32,798 INFO L78 Accepts]: Start accepts. Automaton has 74655 states and 277467 transitions. Word has length 32 [2021-03-10 23:41:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:32,798 INFO L480 AbstractCegarLoop]: Abstraction has 74655 states and 277467 transitions. [2021-03-10 23:41:32,798 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) [2021-03-10 23:41:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 74655 states and 277467 transitions. [2021-03-10 23:41:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:41:32,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:32,931 INFO L519 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] [2021-03-10 23:41:33,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:33,131 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:33,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1789990140, now seen corresponding path program 163 times [2021-03-10 23:41:33,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:33,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019496473] [2021-03-10 23:41:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:41:33,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019496473] [2021-03-10 23:41:33,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830186761] [2021-03-10 23:41:33,168 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 [2021-03-10 23:41:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:33,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:33,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:41:33,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:33,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 23:41:33,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143022792] [2021-03-10 23:41:33,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:41:33,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:33,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:41:33,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:41:33,294 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) [2021-03-10 23:41:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:35,298 INFO L93 Difference]: Finished difference Result 126973 states and 451879 transitions. [2021-03-10 23:41:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 23:41:35,299 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 [2021-03-10 23:41:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:35,606 INFO L225 Difference]: With dead ends: 126973 [2021-03-10 23:41:35,607 INFO L226 Difference]: Without dead ends: 126092 [2021-03-10 23:41:35,607 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 623.5ms TimeCoverageRelationStatistics Valid=660, Invalid=2310, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:41:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126092 states. [2021-03-10 23:41:37,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126092 to 81796. [2021-03-10 23:41:37,349 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) [2021-03-10 23:41:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81796 states to 81796 states and 304842 transitions. [2021-03-10 23:41:37,898 INFO L78 Accepts]: Start accepts. Automaton has 81796 states and 304842 transitions. Word has length 32 [2021-03-10 23:41:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:37,898 INFO L480 AbstractCegarLoop]: Abstraction has 81796 states and 304842 transitions. [2021-03-10 23:41:37,898 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) [2021-03-10 23:41:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 81796 states and 304842 transitions. [2021-03-10 23:41:38,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:41:38,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:38,025 INFO L519 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] [2021-03-10 23:41:38,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:38,225 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:38,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:38,226 INFO L82 PathProgramCache]: Analyzing trace with hash 2130967828, now seen corresponding path program 164 times [2021-03-10 23:41:38,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:38,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357792790] [2021-03-10 23:41:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:41:38,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357792790] [2021-03-10 23:41:38,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259667871] [2021-03-10 23:41:38,267 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 [2021-03-10 23:41:38,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:41:38,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:38,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:41:38,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:38,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-03-10 23:41:38,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945709223] [2021-03-10 23:41:38,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:41:38,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:38,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:41:38,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:41:38,390 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) [2021-03-10 23:41:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:40,910 INFO L93 Difference]: Finished difference Result 103823 states and 367181 transitions. [2021-03-10 23:41:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 23:41:40,912 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 [2021-03-10 23:41:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:41,202 INFO L225 Difference]: With dead ends: 103823 [2021-03-10 23:41:41,203 INFO L226 Difference]: Without dead ends: 102463 [2021-03-10 23:41:41,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 982.1ms TimeCoverageRelationStatistics Valid=1264, Invalid=4898, Unknown=0, NotChecked=0, Total=6162 [2021-03-10 23:41:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102463 states. [2021-03-10 23:41:42,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102463 to 81213. [2021-03-10 23:41:42,850 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) [2021-03-10 23:41:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81213 states to 81213 states and 302224 transitions. [2021-03-10 23:41:43,401 INFO L78 Accepts]: Start accepts. Automaton has 81213 states and 302224 transitions. Word has length 32 [2021-03-10 23:41:43,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:43,401 INFO L480 AbstractCegarLoop]: Abstraction has 81213 states and 302224 transitions. [2021-03-10 23:41:43,401 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) [2021-03-10 23:41:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 81213 states and 302224 transitions. [2021-03-10 23:41:43,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:41:43,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:43,543 INFO L519 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] [2021-03-10 23:41:43,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-03-10 23:41:43,744 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:43,744 INFO L82 PathProgramCache]: Analyzing trace with hash -81096240, now seen corresponding path program 165 times [2021-03-10 23:41:43,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:43,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857643534] [2021-03-10 23:41:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 23:41:43,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857643534] [2021-03-10 23:41:43,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109705943] [2021-03-10 23:41:43,782 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 [2021-03-10 23:41:43,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:41:43,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:43,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 23:41:43,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:43,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 23:41:43,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843107453] [2021-03-10 23:41:43,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:41:43,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:43,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:41:43,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:41:43,873 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) [2021-03-10 23:41:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:44,383 INFO L93 Difference]: Finished difference Result 89727 states and 327410 transitions. [2021-03-10 23:41:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:41:44,384 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 [2021-03-10 23:41:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:44,599 INFO L225 Difference]: With dead ends: 89727 [2021-03-10 23:41:44,599 INFO L226 Difference]: Without dead ends: 89463 [2021-03-10 23:41:44,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:41:44,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89463 states. [2021-03-10 23:41:46,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89463 to 81093. [2021-03-10 23:41:46,417 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) [2021-03-10 23:41:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81093 states to 81093 states and 301549 transitions. [2021-03-10 23:41:46,713 INFO L78 Accepts]: Start accepts. Automaton has 81093 states and 301549 transitions. Word has length 32 [2021-03-10 23:41:46,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:46,713 INFO L480 AbstractCegarLoop]: Abstraction has 81093 states and 301549 transitions. [2021-03-10 23:41:46,713 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) [2021-03-10 23:41:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 81093 states and 301549 transitions. [2021-03-10 23:41:46,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:41:46,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:46,871 INFO L519 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] [2021-03-10 23:41:47,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:47,079 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1144501508, now seen corresponding path program 166 times [2021-03-10 23:41:47,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:47,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063748560] [2021-03-10 23:41:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 23:41:47,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063748560] [2021-03-10 23:41:47,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732715110] [2021-03-10 23:41:47,124 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:47,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:41:47,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:47,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:47,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 23:41:47,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:47,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 23:41:47,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833987911] [2021-03-10 23:41:47,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:41:47,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:47,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:41:47,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:41:47,241 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) [2021-03-10 23:41:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:47,777 INFO L93 Difference]: Finished difference Result 95050 states and 344724 transitions. [2021-03-10 23:41:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:41:47,778 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 [2021-03-10 23:41:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:48,006 INFO L225 Difference]: With dead ends: 95050 [2021-03-10 23:41:48,006 INFO L226 Difference]: Without dead ends: 94988 [2021-03-10 23:41:48,006 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:41:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94988 states. [2021-03-10 23:41:49,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94988 to 80568. [2021-03-10 23:41:49,736 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) [2021-03-10 23:41:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80568 states to 80568 states and 298562 transitions. [2021-03-10 23:41:49,984 INFO L78 Accepts]: Start accepts. Automaton has 80568 states and 298562 transitions. Word has length 32 [2021-03-10 23:41:49,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:49,985 INFO L480 AbstractCegarLoop]: Abstraction has 80568 states and 298562 transitions. [2021-03-10 23:41:49,985 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) [2021-03-10 23:41:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 80568 states and 298562 transitions. [2021-03-10 23:41:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:41:50,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:50,123 INFO L519 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] [2021-03-10 23:41:50,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-03-10 23:41:50,327 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:50,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1462193428, now seen corresponding path program 167 times [2021-03-10 23:41:50,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:50,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880934240] [2021-03-10 23:41:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 23:41:50,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880934240] [2021-03-10 23:41:50,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31785726] [2021-03-10 23:41:50,372 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:50,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:41:50,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:50,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:41:50,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 23:41:50,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:50,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-03-10 23:41:50,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048498995] [2021-03-10 23:41:50,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:41:50,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:50,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:41:50,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:41:50,503 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) [2021-03-10 23:41:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:52,048 INFO L93 Difference]: Finished difference Result 137312 states and 490128 transitions. [2021-03-10 23:41:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:41:52,050 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 [2021-03-10 23:41:52,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:52,426 INFO L225 Difference]: With dead ends: 137312 [2021-03-10 23:41:52,426 INFO L226 Difference]: Without dead ends: 137132 [2021-03-10 23:41:52,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:41:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137132 states. [2021-03-10 23:41:54,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137132 to 97897. [2021-03-10 23:41:54,777 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) [2021-03-10 23:41:55,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97897 states to 97897 states and 364291 transitions. [2021-03-10 23:41:55,097 INFO L78 Accepts]: Start accepts. Automaton has 97897 states and 364291 transitions. Word has length 32 [2021-03-10 23:41:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:55,097 INFO L480 AbstractCegarLoop]: Abstraction has 97897 states and 364291 transitions. [2021-03-10 23:41:55,097 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) [2021-03-10 23:41:55,097 INFO L276 IsEmpty]: Start isEmpty. Operand 97897 states and 364291 transitions. [2021-03-10 23:41:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:41:55,261 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:55,261 INFO L519 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] [2021-03-10 23:41:55,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-03-10 23:41:55,461 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:55,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:55,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1396100842, now seen corresponding path program 168 times [2021-03-10 23:41:55,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:55,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329923793] [2021-03-10 23:41:55,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 23:41:55,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329923793] [2021-03-10 23:41:55,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565497300] [2021-03-10 23:41:55,491 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:55,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:41:55,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:55,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:41:55,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:41:55,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:55,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 23:41:55,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956436448] [2021-03-10 23:41:55,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:41:55,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:55,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:41:55,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:41:55,615 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) [2021-03-10 23:41:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:57,680 INFO L93 Difference]: Finished difference Result 144885 states and 519929 transitions. [2021-03-10 23:41:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 23:41:57,682 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 [2021-03-10 23:41:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:58,070 INFO L225 Difference]: With dead ends: 144885 [2021-03-10 23:41:58,070 INFO L226 Difference]: Without dead ends: 144573 [2021-03-10 23:41:58,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 658.1ms TimeCoverageRelationStatistics Valid=688, Invalid=2392, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:41:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144573 states. [2021-03-10 23:42:00,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144573 to 114379. [2021-03-10 23:42:00,851 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) [2021-03-10 23:42:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114379 states to 114379 states and 428060 transitions. [2021-03-10 23:42:01,566 INFO L78 Accepts]: Start accepts. Automaton has 114379 states and 428060 transitions. Word has length 32 [2021-03-10 23:42:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:01,566 INFO L480 AbstractCegarLoop]: Abstraction has 114379 states and 428060 transitions. [2021-03-10 23:42:01,566 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) [2021-03-10 23:42:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 114379 states and 428060 transitions. [2021-03-10 23:42:01,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:42:01,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:01,761 INFO L519 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] [2021-03-10 23:42:01,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-03-10 23:42:01,962 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:01,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:01,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2064838904, now seen corresponding path program 169 times [2021-03-10 23:42:01,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:01,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949452634] [2021-03-10 23:42:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:42:02,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949452634] [2021-03-10 23:42:02,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241116166] [2021-03-10 23:42:02,027 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:02,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:42:02,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:42:02,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:02,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-03-10 23:42:02,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445867545] [2021-03-10 23:42:02,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:42:02,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:02,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:42:02,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:42:02,176 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) [2021-03-10 23:42:05,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:05,017 INFO L93 Difference]: Finished difference Result 145887 states and 519027 transitions. [2021-03-10 23:42:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 23:42:05,018 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 [2021-03-10 23:42:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:05,429 INFO L225 Difference]: With dead ends: 145887 [2021-03-10 23:42:05,429 INFO L226 Difference]: Without dead ends: 144953 [2021-03-10 23:42:05,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1123.6ms TimeCoverageRelationStatistics Valid=1225, Invalid=4937, Unknown=0, NotChecked=0, Total=6162 [2021-03-10 23:42:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144953 states. [2021-03-10 23:42:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144953 to 114129. [2021-03-10 23:42:07,870 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) [2021-03-10 23:42:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114129 states to 114129 states and 426748 transitions. [2021-03-10 23:42:08,225 INFO L78 Accepts]: Start accepts. Automaton has 114129 states and 426748 transitions. Word has length 32 [2021-03-10 23:42:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:08,225 INFO L480 AbstractCegarLoop]: Abstraction has 114129 states and 426748 transitions. [2021-03-10 23:42:08,225 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) [2021-03-10 23:42:08,225 INFO L276 IsEmpty]: Start isEmpty. Operand 114129 states and 426748 transitions. [2021-03-10 23:42:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:42:08,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:08,925 INFO L519 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] [2021-03-10 23:42:09,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:09,125 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:09,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1651144382, now seen corresponding path program 170 times [2021-03-10 23:42:09,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:09,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812311181] [2021-03-10 23:42:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 23:42:09,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812311181] [2021-03-10 23:42:09,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316584539] [2021-03-10 23:42:09,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:09,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:42:09,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:09,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:42:09,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:42:09,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:09,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 23:42:09,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063933278] [2021-03-10 23:42:09,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:42:09,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:09,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:42:09,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:42:09,329 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) [2021-03-10 23:42:10,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:10,812 INFO L93 Difference]: Finished difference Result 131239 states and 477233 transitions. [2021-03-10 23:42:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:42:10,813 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 [2021-03-10 23:42:10,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:11,176 INFO L225 Difference]: With dead ends: 131239 [2021-03-10 23:42:11,176 INFO L226 Difference]: Without dead ends: 130909 [2021-03-10 23:42:11,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 552.6ms TimeCoverageRelationStatistics Valid=460, Invalid=1610, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:42:11,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130909 states. [2021-03-10 23:42:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130909 to 114599. [2021-03-10 23:42:13,665 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) [2021-03-10 23:42:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114599 states to 114599 states and 428024 transitions. [2021-03-10 23:42:14,443 INFO L78 Accepts]: Start accepts. Automaton has 114599 states and 428024 transitions. Word has length 32 [2021-03-10 23:42:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:14,444 INFO L480 AbstractCegarLoop]: Abstraction has 114599 states and 428024 transitions. [2021-03-10 23:42:14,444 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) [2021-03-10 23:42:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 114599 states and 428024 transitions. [2021-03-10 23:42:14,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:42:14,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:14,661 INFO L519 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] [2021-03-10 23:42:14,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-03-10 23:42:14,862 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:14,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1784629138, now seen corresponding path program 171 times [2021-03-10 23:42:14,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:14,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269806445] [2021-03-10 23:42:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:15,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269806445] [2021-03-10 23:42:15,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433506684] [2021-03-10 23:42:15,325 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:15,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:42:15,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:15,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:42:15,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:16,191 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 [2021-03-10 23:42:16,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:16,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:16,240 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. [2021-03-10 23:42:16,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:79, output treesize:78 [2021-03-10 23:42:16,358 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 [2021-03-10 23:42:16,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:16,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:16,401 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. [2021-03-10 23:42:16,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:91 [2021-03-10 23:42:16,624 INFO L446 ElimStorePlain]: Different costs {0=[v_C_234], 5=[B], 9=[A]} [2021-03-10 23:42:16,629 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 41 treesize of output 35 [2021-03-10 23:42:16,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:16,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:16,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:16,715 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 34 treesize of output 62 [2021-03-10 23:42:16,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 23:42:16,891 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 52 [2021-03-10 23:42:16,892 INFO L628 ElimStorePlain]: treesize reduction 159, result has 43.6 percent of original size [2021-03-10 23:42:16,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:16,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:16,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:16,942 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 93 treesize of output 103