/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/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:01:42,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:01:42,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:01:42,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:01:42,320 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 23:01:42,348 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:01:42,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:01:42,349 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:01:42,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:01:42,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:01:42,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:01:42,352 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:01:42,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:01:42,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:01:42,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:01:42,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:01:42,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:01:42,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:01:42,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:01:42,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:01:42,354 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:01:42,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:01:42,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:01:42,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:01:42,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:01:42,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:01:42,355 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:01:42,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:01:42,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:01:42,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:01:42,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:01:42,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:01:42,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:01:42,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:01:42,356 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:01:42,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:01:42,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:01:42,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:01:42,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:01:42,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:01:42,711 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:01:42,712 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:01:42,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2021-06-05 23:01:42,713 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2021-06-05 23:01:42,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:01:42,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:01:42,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:01:42,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:01:42,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:01:42,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:01:42" (1/1) ... [2021-06-05 23:01:42,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:01:42" (1/1) ... [2021-06-05 23:01:42,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:01:42,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:01:42,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:01:42,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:01:42,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:01:42" (1/1) ... [2021-06-05 23:01:42,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:01:42" (1/1) ... [2021-06-05 23:01:42,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:01:42" (1/1) ... [2021-06-05 23:01:42,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:01:42" (1/1) ... [2021-06-05 23:01:42,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:01:42" (1/1) ... [2021-06-05 23:01:42,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:01:42" (1/1) ... [2021-06-05 23:01:42,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:01:42" (1/1) ... [2021-06-05 23:01:42,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:01:42,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:01:42,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:01:42,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:01:42,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:01:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:01:42,885 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:01:42,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:01:42,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:01:42,885 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:01:42,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:01:42,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:01:42,886 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:01:42,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:01:42,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:01:42,886 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:01:42,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:01:42,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:01:42,887 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:01:43,059 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:01:43,059 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:01:43,061 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:01:43 BoogieIcfgContainer [2021-06-05 23:01:43,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:01:43,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:01:43,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:01:43,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:01:43,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:01:42" (1/2) ... [2021-06-05 23:01:43,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad9545f and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:01:43, skipping insertion in model container [2021-06-05 23:01:43,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:01:43" (2/2) ... [2021-06-05 23:01:43,067 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2021-06-05 23:01:43,072 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:01:43,072 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:01:43,072 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:01:43,073 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:01:43,102 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 23:01:43,140 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 23:01:43,155 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:01:43,155 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:01:43,155 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:01:43,155 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:01:43,156 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:01:43,156 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:01:43,156 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:01:43,156 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:01:43,164 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 30 transitions, 84 flow [2021-06-05 23:01:43,186 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 134 states, 132 states have (on average 2.5833333333333335) internal successors, (341), 133 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:43,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 132 states have (on average 2.5833333333333335) internal successors, (341), 133 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:01:43,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:43,197 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:43,197 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:43,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:43,202 INFO L82 PathProgramCache]: Analyzing trace with hash 33215059, now seen corresponding path program 1 times [2021-06-05 23:01:43,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:43,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279358127] [2021-06-05 23:01:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:43,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:43,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279358127] [2021-06-05 23:01:43,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279358127] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:01:43,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:01:43,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:01:43,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804713651] [2021-06-05 23:01:43,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:01:43,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:43,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:01:43,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:01:43,387 INFO L87 Difference]: Start difference. First operand has 134 states, 132 states have (on average 2.5833333333333335) internal successors, (341), 133 states have internal predecessors, (341), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:43,443 INFO L93 Difference]: Finished difference Result 172 states and 413 transitions. [2021-06-05 23:01:43,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:01:43,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 23:01:43,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:43,456 INFO L225 Difference]: With dead ends: 172 [2021-06-05 23:01:43,456 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 23:01:43,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:01:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 23:01:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-06-05 23:01:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 108 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 249 transitions. [2021-06-05 23:01:43,518 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 249 transitions. Word has length 19 [2021-06-05 23:01:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:43,519 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 249 transitions. [2021-06-05 23:01:43,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:43,520 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 249 transitions. [2021-06-05 23:01:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:01:43,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:43,523 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:43,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:01:43,525 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:43,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash 627872769, now seen corresponding path program 2 times [2021-06-05 23:01:43,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:43,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169626495] [2021-06-05 23:01:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:43,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:43,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169626495] [2021-06-05 23:01:43,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169626495] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:01:43,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:01:43,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:01:43,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198867559] [2021-06-05 23:01:43,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:01:43,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:43,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:01:43,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:01:43,606 INFO L87 Difference]: Start difference. First operand 109 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:43,681 INFO L93 Difference]: Finished difference Result 190 states and 436 transitions. [2021-06-05 23:01:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:01:43,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 23:01:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:43,688 INFO L225 Difference]: With dead ends: 190 [2021-06-05 23:01:43,688 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 23:01:43,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:01:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 23:01:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-06-05 23:01:43,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3404255319148937) internal successors, (330), 141 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 330 transitions. [2021-06-05 23:01:43,712 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 330 transitions. Word has length 19 [2021-06-05 23:01:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:43,712 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 330 transitions. [2021-06-05 23:01:43,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 330 transitions. [2021-06-05 23:01:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:01:43,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:43,718 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:43,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:01:43,719 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:43,721 INFO L82 PathProgramCache]: Analyzing trace with hash -189898910, now seen corresponding path program 1 times [2021-06-05 23:01:43,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:43,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441395252] [2021-06-05 23:01:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:43,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:43,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441395252] [2021-06-05 23:01:43,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441395252] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:01:43,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:01:43,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:01:43,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466380005] [2021-06-05 23:01:43,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:01:43,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:43,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:01:43,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:01:43,779 INFO L87 Difference]: Start difference. First operand 142 states and 330 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2021-06-05 23:01:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:43,789 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2021-06-05 23:01:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:01:43,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 [2021-06-05 23:01:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:43,791 INFO L225 Difference]: With dead ends: 164 [2021-06-05 23:01:43,791 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 23:01:43,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:01:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 23:01:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-06-05 23:01:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.3178807947019866) internal successors, (350), 151 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2021-06-05 23:01:43,798 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 22 [2021-06-05 23:01:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:43,798 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2021-06-05 23:01:43,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2021-06-05 23:01:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2021-06-05 23:01:43,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:43,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:43,799 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:43,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:01:43,799 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:43,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:43,800 INFO L82 PathProgramCache]: Analyzing trace with hash -480736564, now seen corresponding path program 1 times [2021-06-05 23:01:43,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:43,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726422828] [2021-06-05 23:01:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:43,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:43,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726422828] [2021-06-05 23:01:43,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726422828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:43,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174994994] [2021-06-05 23:01:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:44,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:01:44,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:44,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:01:44,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:44,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:44,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:44,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-06-05 23:01:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:44,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174994994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:44,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:44,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 23:01:44,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300614186] [2021-06-05 23:01:44,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:01:44,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:44,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:01:44,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:01:44,385 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:44,683 INFO L93 Difference]: Finished difference Result 302 states and 708 transitions. [2021-06-05 23:01:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:01:44,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:01:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:44,685 INFO L225 Difference]: With dead ends: 302 [2021-06-05 23:01:44,685 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 23:01:44,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:01:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 23:01:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 185. [2021-06-05 23:01:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.342391304347826) internal successors, (431), 184 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 431 transitions. [2021-06-05 23:01:44,694 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 431 transitions. Word has length 25 [2021-06-05 23:01:44,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:44,694 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 431 transitions. [2021-06-05 23:01:44,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 431 transitions. [2021-06-05 23:01:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:01:44,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:44,696 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:44,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:44,919 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1527967927, now seen corresponding path program 2 times [2021-06-05 23:01:44,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:44,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894930956] [2021-06-05 23:01:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:44,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:44,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894930956] [2021-06-05 23:01:44,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894930956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:44,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263873424] [2021-06-05 23:01:44,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:44,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:01:44,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:44,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:01:45,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:45,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263873424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:45,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:45,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 23:01:45,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733239531] [2021-06-05 23:01:45,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:01:45,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:45,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:01:45,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:01:45,068 INFO L87 Difference]: Start difference. First operand 185 states and 431 transitions. Second operand has 5 states, 5 states have (on average 6.8) 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) [2021-06-05 23:01:45,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:45,080 INFO L93 Difference]: Finished difference Result 496 states and 1143 transitions. [2021-06-05 23:01:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:01:45,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) 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 28 [2021-06-05 23:01:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:45,083 INFO L225 Difference]: With dead ends: 496 [2021-06-05 23:01:45,083 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 23:01:45,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:01:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 23:01:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 336. [2021-06-05 23:01:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.4298507462686567) internal successors, (814), 335 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 814 transitions. [2021-06-05 23:01:45,098 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 814 transitions. Word has length 28 [2021-06-05 23:01:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:45,098 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 814 transitions. [2021-06-05 23:01:45,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.8) 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) [2021-06-05 23:01:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 814 transitions. [2021-06-05 23:01:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:45,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:45,100 INFO L554 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, 1, 1, 1] [2021-06-05 23:01:45,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:45,322 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:45,323 INFO L82 PathProgramCache]: Analyzing trace with hash 703493603, now seen corresponding path program 3 times [2021-06-05 23:01:45,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:45,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071204818] [2021-06-05 23:01:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:45,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:45,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071204818] [2021-06-05 23:01:45,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071204818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:45,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401855214] [2021-06-05 23:01:45,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:45,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:01:45,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:45,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:01:45,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:45,995 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:01:45,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:01:45,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:46,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:46,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:46,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:01:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:46,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401855214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:46,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:46,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 23:01:46,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587455172] [2021-06-05 23:01:46,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:01:46,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:46,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:01:46,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:01:46,095 INFO L87 Difference]: Start difference. First operand 336 states and 814 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:48,607 INFO L93 Difference]: Finished difference Result 1720 states and 4262 transitions. [2021-06-05 23:01:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:01:48,608 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:48,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:48,613 INFO L225 Difference]: With dead ends: 1720 [2021-06-05 23:01:48,614 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 23:01:48,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 2123.5ms TimeCoverageRelationStatistics Valid=1330, Invalid=5642, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:01:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 23:01:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 409. [2021-06-05 23:01:48,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.4534313725490198) internal successors, (1001), 408 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1001 transitions. [2021-06-05 23:01:48,637 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1001 transitions. Word has length 31 [2021-06-05 23:01:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:48,637 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1001 transitions. [2021-06-05 23:01:48,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1001 transitions. [2021-06-05 23:01:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:48,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:48,639 INFO L554 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, 1, 1, 1] [2021-06-05 23:01:48,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:48,853 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:48,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:48,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1642327051, now seen corresponding path program 4 times [2021-06-05 23:01:48,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:48,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393201527] [2021-06-05 23:01:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:49,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:49,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393201527] [2021-06-05 23:01:49,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393201527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:49,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830050796] [2021-06-05 23:01:49,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:49,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:01:49,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:49,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:01:49,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:49,303 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:01:49,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:01:49,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:49,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:49,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:49,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:01:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:49,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830050796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:49,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:49,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 23:01:49,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312310826] [2021-06-05 23:01:49,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:01:49,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:49,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:01:49,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:01:49,382 INFO L87 Difference]: Start difference. First operand 409 states and 1001 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:51,144 INFO L93 Difference]: Finished difference Result 1293 states and 3137 transitions. [2021-06-05 23:01:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:01:51,144 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:51,150 INFO L225 Difference]: With dead ends: 1293 [2021-06-05 23:01:51,150 INFO L226 Difference]: Without dead ends: 1200 [2021-06-05 23:01:51,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1537.6ms TimeCoverageRelationStatistics Valid=1047, Invalid=4065, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:01:51,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-05 23:01:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 413. [2021-06-05 23:01:51,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.4490291262135924) internal successors, (1009), 412 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:51,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1009 transitions. [2021-06-05 23:01:51,169 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1009 transitions. Word has length 31 [2021-06-05 23:01:51,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:51,170 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1009 transitions. [2021-06-05 23:01:51,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1009 transitions. [2021-06-05 23:01:51,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:51,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:51,171 INFO L554 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, 1, 1, 1] [2021-06-05 23:01:51,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:51,385 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:51,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1488152547, now seen corresponding path program 5 times [2021-06-05 23:01:51,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:51,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490884706] [2021-06-05 23:01:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:51,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:51,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490884706] [2021-06-05 23:01:51,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490884706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:51,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136473450] [2021-06-05 23:01:51,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:51,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:01:51,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:51,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:51,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:51,838 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:01:51,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:01:51,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:51,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:51,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:51,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:01:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:51,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136473450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:51,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:51,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 23:01:51,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196614290] [2021-06-05 23:01:51,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:01:51,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:51,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:01:51,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:01:51,914 INFO L87 Difference]: Start difference. First operand 413 states and 1009 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:54,323 INFO L93 Difference]: Finished difference Result 3428 states and 8347 transitions. [2021-06-05 23:01:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 23:01:54,323 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:54,335 INFO L225 Difference]: With dead ends: 3428 [2021-06-05 23:01:54,336 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 23:01:54,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 2031.6ms TimeCoverageRelationStatistics Valid=1636, Invalid=7106, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 23:01:54,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 23:01:54,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 445. [2021-06-05 23:01:54,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.463963963963964) internal successors, (1094), 444 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1094 transitions. [2021-06-05 23:01:54,362 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1094 transitions. Word has length 31 [2021-06-05 23:01:54,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:54,362 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1094 transitions. [2021-06-05 23:01:54,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1094 transitions. [2021-06-05 23:01:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:54,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:54,366 INFO L554 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, 1, 1, 1] [2021-06-05 23:01:54,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 23:01:54,585 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:54,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:54,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1925512583, now seen corresponding path program 6 times [2021-06-05 23:01:54,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:54,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813183725] [2021-06-05 23:01:54,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:01:54,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:54,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813183725] [2021-06-05 23:01:54,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813183725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:54,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908515470] [2021-06-05 23:01:54,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:54,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:01:54,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:54,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:01:54,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:54,990 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:01:54,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:01:54,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:54,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:54,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:54,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:01:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:55,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908515470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:55,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:55,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 23:01:55,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000940025] [2021-06-05 23:01:55,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:01:55,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:55,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:01:55,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:01:55,067 INFO L87 Difference]: Start difference. First operand 445 states and 1094 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:57,337 INFO L93 Difference]: Finished difference Result 2497 states and 6083 transitions. [2021-06-05 23:01:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 23:01:57,337 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:57,346 INFO L225 Difference]: With dead ends: 2497 [2021-06-05 23:01:57,346 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 23:01:57,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1927.1ms TimeCoverageRelationStatistics Valid=1578, Invalid=6978, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 23:01:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 23:01:57,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 573. [2021-06-05 23:01:57,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.4737762237762237) internal successors, (1415), 572 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1415 transitions. [2021-06-05 23:01:57,373 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1415 transitions. Word has length 31 [2021-06-05 23:01:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:57,373 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1415 transitions. [2021-06-05 23:01:57,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1415 transitions. [2021-06-05 23:01:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:57,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:57,375 INFO L554 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, 1, 1, 1] [2021-06-05 23:01:57,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 23:01:57,589 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash -879696673, now seen corresponding path program 7 times [2021-06-05 23:01:57,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:57,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895513882] [2021-06-05 23:01:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:57,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:57,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895513882] [2021-06-05 23:01:57,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895513882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:57,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032598285] [2021-06-05 23:01:57,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:01:57,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:58,028 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:01:58,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:01:58,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:58,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:58,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:58,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:01:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:58,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032598285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:58,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:58,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 23:01:58,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732845124] [2021-06-05 23:01:58,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:01:58,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:58,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:01:58,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:01:58,107 INFO L87 Difference]: Start difference. First operand 573 states and 1415 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:59,911 INFO L93 Difference]: Finished difference Result 2289 states and 5693 transitions. [2021-06-05 23:01:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:01:59,911 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:59,918 INFO L225 Difference]: With dead ends: 2289 [2021-06-05 23:01:59,918 INFO L226 Difference]: Without dead ends: 1584 [2021-06-05 23:01:59,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1566.0ms TimeCoverageRelationStatistics Valid=1152, Invalid=4854, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 23:01:59,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-06-05 23:01:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 605. [2021-06-05 23:01:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.468543046357616) internal successors, (1491), 604 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1491 transitions. [2021-06-05 23:01:59,941 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1491 transitions. Word has length 31 [2021-06-05 23:01:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:59,942 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1491 transitions. [2021-06-05 23:01:59,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1491 transitions. [2021-06-05 23:01:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:59,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:59,943 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:00,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:00,166 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:00,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:00,166 INFO L82 PathProgramCache]: Analyzing trace with hash 320665773, now seen corresponding path program 8 times [2021-06-05 23:02:00,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:00,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126039144] [2021-06-05 23:02:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:02:00,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:00,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126039144] [2021-06-05 23:02:00,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126039144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:00,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465121004] [2021-06-05 23:02:00,327 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:00,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:02:00,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:00,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:02:00,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:00,562 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:00,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:02:00,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:00,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:00,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:00,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:02:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:00,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465121004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:00,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:00,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 23:02:00,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266093656] [2021-06-05 23:02:00,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:02:00,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:00,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:02:00,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:02:00,630 INFO L87 Difference]: Start difference. First operand 605 states and 1491 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:02,206 INFO L93 Difference]: Finished difference Result 2332 states and 5648 transitions. [2021-06-05 23:02:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:02:02,207 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:02:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:02,213 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 23:02:02,214 INFO L226 Difference]: Without dead ends: 1883 [2021-06-05 23:02:02,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 1354.1ms TimeCoverageRelationStatistics Valid=1008, Invalid=4248, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:02:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-06-05 23:02:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 643. [2021-06-05 23:02:02,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.454828660436137) internal successors, (1576), 642 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1576 transitions. [2021-06-05 23:02:02,239 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1576 transitions. Word has length 31 [2021-06-05 23:02:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:02,240 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1576 transitions. [2021-06-05 23:02:02,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:02,240 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1576 transitions. [2021-06-05 23:02:02,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:02:02,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:02,241 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:02,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:02:02,457 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:02,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:02,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2067503680, now seen corresponding path program 9 times [2021-06-05 23:02:02,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:02,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005374569] [2021-06-05 23:02:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:02,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:02,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005374569] [2021-06-05 23:02:02,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005374569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:02,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884513013] [2021-06-05 23:02:02,489 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:02,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:02:02,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:02,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:02:02,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:02,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884513013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:02,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:02,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 23:02:02,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81127212] [2021-06-05 23:02:02,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:02:02,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:02,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:02:02,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:02:02,588 INFO L87 Difference]: Start difference. First operand 643 states and 1576 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:02,601 INFO L93 Difference]: Finished difference Result 1162 states and 2791 transitions. [2021-06-05 23:02:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:02:02,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:02:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:02,606 INFO L225 Difference]: With dead ends: 1162 [2021-06-05 23:02:02,606 INFO L226 Difference]: Without dead ends: 1105 [2021-06-05 23:02:02,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:02:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-06-05 23:02:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 768. [2021-06-05 23:02:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.4771838331160363) internal successors, (1900), 767 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1900 transitions. [2021-06-05 23:02:02,623 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1900 transitions. Word has length 34 [2021-06-05 23:02:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:02,623 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 1900 transitions. [2021-06-05 23:02:02,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:02,623 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1900 transitions. [2021-06-05 23:02:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:02,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:02,625 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:02,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 23:02:02,841 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:02,841 INFO L82 PathProgramCache]: Analyzing trace with hash 774999660, now seen corresponding path program 10 times [2021-06-05 23:02:02,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:02,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054756397] [2021-06-05 23:02:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:03,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054756397] [2021-06-05 23:02:03,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054756397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564802036] [2021-06-05 23:02:03,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:03,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:02:03,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:03,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:02:03,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:03,514 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:03,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:02:03,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:03,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:03,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:03,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:02:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:03,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564802036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:03,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:03,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 23:02:03,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791928680] [2021-06-05 23:02:03,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:02:03,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:03,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:02:03,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:02:03,591 INFO L87 Difference]: Start difference. First operand 768 states and 1900 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:07,736 INFO L93 Difference]: Finished difference Result 4022 states and 9925 transitions. [2021-06-05 23:02:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 23:02:07,737 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:02:07,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:07,746 INFO L225 Difference]: With dead ends: 4022 [2021-06-05 23:02:07,746 INFO L226 Difference]: Without dead ends: 3406 [2021-06-05 23:02:07,749 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 3480.5ms TimeCoverageRelationStatistics Valid=2702, Invalid=15120, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 23:02:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2021-06-05 23:02:07,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 917. [2021-06-05 23:02:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.5010917030567685) internal successors, (2291), 916 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2291 transitions. [2021-06-05 23:02:07,780 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2291 transitions. Word has length 37 [2021-06-05 23:02:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:07,780 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2291 transitions. [2021-06-05 23:02:07,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2291 transitions. [2021-06-05 23:02:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:07,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:07,782 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:07,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 23:02:07,997 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1677954198, now seen corresponding path program 11 times [2021-06-05 23:02:07,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:07,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022960024] [2021-06-05 23:02:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:08,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:08,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022960024] [2021-06-05 23:02:08,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022960024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:08,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53175410] [2021-06-05 23:02:08,258 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:08,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:02:08,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:08,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:02:08,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:08,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:02:08,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:08,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:08,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:08,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:08,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:08,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:08,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:02:08,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:02:08,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:02:08,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:08,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:08,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:08,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 23:02:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:08,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53175410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:08,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:08,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 23:02:08,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264004704] [2021-06-05 23:02:08,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:02:08,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:08,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:02:08,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:02:08,900 INFO L87 Difference]: Start difference. First operand 917 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:14,196 INFO L93 Difference]: Finished difference Result 6772 states and 16848 transitions. [2021-06-05 23:02:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-06-05 23:02:14,197 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:02:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:14,214 INFO L225 Difference]: With dead ends: 6772 [2021-06-05 23:02:14,214 INFO L226 Difference]: Without dead ends: 5574 [2021-06-05 23:02:14,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7549 ImplicationChecksByTransitivity, 4504.6ms TimeCoverageRelationStatistics Valid=3398, Invalid=18064, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 23:02:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2021-06-05 23:02:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 1099. [2021-06-05 23:02:14,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 2.517304189435337) internal successors, (2764), 1098 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 2764 transitions. [2021-06-05 23:02:14,265 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 2764 transitions. Word has length 37 [2021-06-05 23:02:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:14,265 INFO L482 AbstractCegarLoop]: Abstraction has 1099 states and 2764 transitions. [2021-06-05 23:02:14,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 2764 transitions. [2021-06-05 23:02:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:14,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:14,269 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:14,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:14,485 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1793916204, now seen corresponding path program 12 times [2021-06-05 23:02:14,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:14,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590646821] [2021-06-05 23:02:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:14,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:14,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590646821] [2021-06-05 23:02:14,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590646821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:14,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074962243] [2021-06-05 23:02:14,713 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:14,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:02:14,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:14,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:02:14,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:15,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:15,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:02:15,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:15,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:15,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:02:15,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 23:02:15,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:15,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:15,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:15,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:10 [2021-06-05 23:02:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:15,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074962243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:15,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:15,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 23:02:15,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586017488] [2021-06-05 23:02:15,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:02:15,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:15,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:02:15,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:02:15,564 INFO L87 Difference]: Start difference. First operand 1099 states and 2764 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:20,818 INFO L93 Difference]: Finished difference Result 5656 states and 14216 transitions. [2021-06-05 23:02:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 23:02:20,818 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:02:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:20,838 INFO L225 Difference]: With dead ends: 5656 [2021-06-05 23:02:20,838 INFO L226 Difference]: Without dead ends: 5239 [2021-06-05 23:02:20,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6607 ImplicationChecksByTransitivity, 4325.2ms TimeCoverageRelationStatistics Valid=2865, Invalid=16595, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 23:02:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2021-06-05 23:02:20,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 1221. [2021-06-05 23:02:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.533606557377049) internal successors, (3091), 1220 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3091 transitions. [2021-06-05 23:02:20,885 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3091 transitions. Word has length 37 [2021-06-05 23:02:20,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:20,886 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3091 transitions. [2021-06-05 23:02:20,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3091 transitions. [2021-06-05 23:02:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:20,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:20,888 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:21,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:21,105 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:21,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1799631944, now seen corresponding path program 13 times [2021-06-05 23:02:21,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:21,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888722884] [2021-06-05 23:02:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:02:21,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:21,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888722884] [2021-06-05 23:02:21,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888722884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:21,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782878346] [2021-06-05 23:02:21,304 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:21,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:02:21,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:21,702 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:21,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:02:21,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:21,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:21,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:21,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:02:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:21,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782878346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:21,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:21,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-06-05 23:02:21,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709238606] [2021-06-05 23:02:21,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:02:21,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:21,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:02:21,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:02:21,782 INFO L87 Difference]: Start difference. First operand 1221 states and 3091 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:26,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:26,716 INFO L93 Difference]: Finished difference Result 7387 states and 18497 transitions. [2021-06-05 23:02:26,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 23:02:26,716 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:02:26,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:26,728 INFO L225 Difference]: With dead ends: 7387 [2021-06-05 23:02:26,728 INFO L226 Difference]: Without dead ends: 6259 [2021-06-05 23:02:26,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8391 ImplicationChecksByTransitivity, 4175.6ms TimeCoverageRelationStatistics Valid=3701, Invalid=18649, Unknown=0, NotChecked=0, Total=22350 [2021-06-05 23:02:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6259 states. [2021-06-05 23:02:26,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6259 to 1453. [2021-06-05 23:02:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 2.548898071625344) internal successors, (3701), 1452 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:26,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 3701 transitions. [2021-06-05 23:02:26,784 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 3701 transitions. Word has length 37 [2021-06-05 23:02:26,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:26,784 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 3701 transitions. [2021-06-05 23:02:26,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:26,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 3701 transitions. [2021-06-05 23:02:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:26,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:26,787 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:27,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 23:02:27,011 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:27,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:27,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1710676408, now seen corresponding path program 14 times [2021-06-05 23:02:27,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:27,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204591108] [2021-06-05 23:02:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:27,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:27,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204591108] [2021-06-05 23:02:27,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204591108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:27,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377891270] [2021-06-05 23:02:27,233 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:27,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:02:27,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:27,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:02:27,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:27,675 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:27,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:02:27,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:27,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:27,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:27,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:02:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:27,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377891270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:27,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:27,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-06-05 23:02:27,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816011536] [2021-06-05 23:02:27,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:02:27,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:27,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:02:27,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:02:27,750 INFO L87 Difference]: Start difference. First operand 1453 states and 3701 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:32,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:32,729 INFO L93 Difference]: Finished difference Result 9364 states and 23545 transitions. [2021-06-05 23:02:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 23:02:32,730 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:02:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:32,745 INFO L225 Difference]: With dead ends: 9364 [2021-06-05 23:02:32,745 INFO L226 Difference]: Without dead ends: 8006 [2021-06-05 23:02:32,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 4153.8ms TimeCoverageRelationStatistics Valid=3731, Invalid=21709, Unknown=0, NotChecked=0, Total=25440 [2021-06-05 23:02:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2021-06-05 23:02:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 2053. [2021-06-05 23:02:32,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.574561403508772) internal successors, (5283), 2052 states have internal predecessors, (5283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5283 transitions. [2021-06-05 23:02:32,820 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5283 transitions. Word has length 37 [2021-06-05 23:02:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:32,821 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5283 transitions. [2021-06-05 23:02:32,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5283 transitions. [2021-06-05 23:02:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:32,825 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:32,825 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:33,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:33,047 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:33,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1273316372, now seen corresponding path program 15 times [2021-06-05 23:02:33,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:33,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668780266] [2021-06-05 23:02:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:02:33,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:33,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668780266] [2021-06-05 23:02:33,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668780266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:33,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155121767] [2021-06-05 23:02:33,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:33,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:02:33,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:33,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:02:33,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:33,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:02:33,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:33,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:33,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:33,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:33,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:33,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:02:33,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:02:33,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:33,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:33,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:33,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 23:02:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:33,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155121767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:33,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:33,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-06-05 23:02:33,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919132686] [2021-06-05 23:02:33,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:02:33,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:33,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:02:33,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:02:33,784 INFO L87 Difference]: Start difference. First operand 2053 states and 5283 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:37,667 INFO L93 Difference]: Finished difference Result 8726 states and 22162 transitions. [2021-06-05 23:02:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 23:02:37,667 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:02:37,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:37,677 INFO L225 Difference]: With dead ends: 8726 [2021-06-05 23:02:37,677 INFO L226 Difference]: Without dead ends: 7790 [2021-06-05 23:02:37,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6527 ImplicationChecksByTransitivity, 3199.9ms TimeCoverageRelationStatistics Valid=2541, Invalid=15015, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 23:02:37,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-06-05 23:02:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 2539. [2021-06-05 23:02:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2539 states, 2538 states have (on average 2.602442868400315) internal successors, (6605), 2538 states have internal predecessors, (6605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 6605 transitions. [2021-06-05 23:02:37,751 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 6605 transitions. Word has length 37 [2021-06-05 23:02:37,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:37,751 INFO L482 AbstractCegarLoop]: Abstraction has 2539 states and 6605 transitions. [2021-06-05 23:02:37,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:37,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 6605 transitions. [2021-06-05 23:02:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:37,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:37,756 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:37,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:37,980 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:37,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:37,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1801064030, now seen corresponding path program 16 times [2021-06-05 23:02:37,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:37,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556363636] [2021-06-05 23:02:37,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:38,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:38,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556363636] [2021-06-05 23:02:38,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556363636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:38,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114381316] [2021-06-05 23:02:38,219 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:38,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:02:38,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:38,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:02:38,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:38,603 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:38,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:02:38,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:38,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:38,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:38,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:02:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:38,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114381316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:38,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:38,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-06-05 23:02:38,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022285973] [2021-06-05 23:02:38,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:02:38,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:38,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:02:38,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:02:38,678 INFO L87 Difference]: Start difference. First operand 2539 states and 6605 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:42,643 INFO L93 Difference]: Finished difference Result 9458 states and 24261 transitions. [2021-06-05 23:02:42,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 23:02:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:02:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:42,655 INFO L225 Difference]: With dead ends: 9458 [2021-06-05 23:02:42,655 INFO L226 Difference]: Without dead ends: 8487 [2021-06-05 23:02:42,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6032 ImplicationChecksByTransitivity, 3346.2ms TimeCoverageRelationStatistics Valid=2478, Invalid=14552, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 23:02:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8487 states. [2021-06-05 23:02:42,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8487 to 2847. [2021-06-05 23:02:42,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.600843288826423) internal successors, (7402), 2846 states have internal predecessors, (7402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 7402 transitions. [2021-06-05 23:02:42,735 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 7402 transitions. Word has length 37 [2021-06-05 23:02:42,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:42,736 INFO L482 AbstractCegarLoop]: Abstraction has 2847 states and 7402 transitions. [2021-06-05 23:02:42,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 7402 transitions. [2021-06-05 23:02:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:42,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:42,741 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:42,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:42,957 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:42,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1293540820, now seen corresponding path program 17 times [2021-06-05 23:02:42,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:42,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7057433] [2021-06-05 23:02:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:02:43,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:43,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7057433] [2021-06-05 23:02:43,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7057433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:43,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838724698] [2021-06-05 23:02:43,154 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:43,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:02:43,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:43,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:02:43,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:43,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:43,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:02:43,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:43,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:43,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:43,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:43,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:02:43,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 23:02:43,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:43,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:43,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:43,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:55, output treesize:10 [2021-06-05 23:02:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:43,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838724698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:43,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:43,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-06-05 23:02:43,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589699211] [2021-06-05 23:02:43,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:02:43,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:43,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:02:43,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:02:43,832 INFO L87 Difference]: Start difference. First operand 2847 states and 7402 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:47,618 INFO L93 Difference]: Finished difference Result 9180 states and 23382 transitions. [2021-06-05 23:02:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 23:02:47,618 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:02:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:47,627 INFO L225 Difference]: With dead ends: 9180 [2021-06-05 23:02:47,627 INFO L226 Difference]: Without dead ends: 8400 [2021-06-05 23:02:47,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5244 ImplicationChecksByTransitivity, 3111.6ms TimeCoverageRelationStatistics Valid=2057, Invalid=12463, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 23:02:47,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8400 states. [2021-06-05 23:02:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8400 to 3079. [2021-06-05 23:02:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.602014294996751) internal successors, (8009), 3078 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8009 transitions. [2021-06-05 23:02:47,706 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8009 transitions. Word has length 37 [2021-06-05 23:02:47,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:47,706 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8009 transitions. [2021-06-05 23:02:47,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8009 transitions. [2021-06-05 23:02:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:47,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:47,712 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:47,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 23:02:47,925 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:47,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:47,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1590603224, now seen corresponding path program 18 times [2021-06-05 23:02:47,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:47,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090314281] [2021-06-05 23:02:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:48,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:48,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090314281] [2021-06-05 23:02:48,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090314281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:48,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226003389] [2021-06-05 23:02:48,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:48,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:02:48,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:48,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:02:48,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:48,552 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:48,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:02:48,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:48,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:48,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:48,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:02:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:48,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226003389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:48,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:48,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 23:02:48,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139430345] [2021-06-05 23:02:48,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:02:48,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:48,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:02:48,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:02:48,619 INFO L87 Difference]: Start difference. First operand 3079 states and 8009 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:51,772 INFO L93 Difference]: Finished difference Result 9460 states and 24220 transitions. [2021-06-05 23:02:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 23:02:51,772 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:02:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:51,781 INFO L225 Difference]: With dead ends: 9460 [2021-06-05 23:02:51,781 INFO L226 Difference]: Without dead ends: 8811 [2021-06-05 23:02:51,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4494 ImplicationChecksByTransitivity, 3013.5ms TimeCoverageRelationStatistics Valid=2347, Invalid=10993, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 23:02:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8811 states. [2021-06-05 23:02:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8811 to 3651. [2021-06-05 23:02:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 3650 states have (on average 2.5695890410958904) internal successors, (9379), 3650 states have internal predecessors, (9379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 9379 transitions. [2021-06-05 23:02:51,870 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 9379 transitions. Word has length 37 [2021-06-05 23:02:51,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:51,870 INFO L482 AbstractCegarLoop]: Abstraction has 3651 states and 9379 transitions. [2021-06-05 23:02:51,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 9379 transitions. [2021-06-05 23:02:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:51,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:51,878 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:52,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 23:02:52,093 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:52,093 INFO L82 PathProgramCache]: Analyzing trace with hash 49497584, now seen corresponding path program 19 times [2021-06-05 23:02:52,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:52,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602795834] [2021-06-05 23:02:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:52,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:52,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602795834] [2021-06-05 23:02:52,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602795834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:52,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513524524] [2021-06-05 23:02:52,285 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:52,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:02:52,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:52,680 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:52,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:02:52,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:52,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:52,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:52,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:02:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:52,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513524524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:52,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:52,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 23:02:52,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129462165] [2021-06-05 23:02:52,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:02:52,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:52,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:02:52,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:02:52,743 INFO L87 Difference]: Start difference. First operand 3651 states and 9379 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:55,335 INFO L93 Difference]: Finished difference Result 9814 states and 24985 transitions. [2021-06-05 23:02:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 23:02:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:02:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:55,346 INFO L225 Difference]: With dead ends: 9814 [2021-06-05 23:02:55,346 INFO L226 Difference]: Without dead ends: 9455 [2021-06-05 23:02:55,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3877 ImplicationChecksByTransitivity, 2435.5ms TimeCoverageRelationStatistics Valid=1922, Invalid=10068, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 23:02:55,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9455 states. [2021-06-05 23:02:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9455 to 3907. [2021-06-05 23:02:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 2.5629800307219663) internal successors, (10011), 3906 states have internal predecessors, (10011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 10011 transitions. [2021-06-05 23:02:55,436 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 10011 transitions. Word has length 37 [2021-06-05 23:02:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:55,436 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 10011 transitions. [2021-06-05 23:02:55,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 10011 transitions. [2021-06-05 23:02:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:55,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:55,446 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:55,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:55,661 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:55,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1285155348, now seen corresponding path program 20 times [2021-06-05 23:02:55,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:55,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092030926] [2021-06-05 23:02:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:55,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:55,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092030926] [2021-06-05 23:02:55,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092030926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:55,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10322453] [2021-06-05 23:02:55,884 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:55,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:02:55,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:55,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:02:55,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:56,248 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:56,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:02:56,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:56,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:56,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:56,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:02:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:56,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10322453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:56,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:56,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 23:02:56,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445107659] [2021-06-05 23:02:56,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:02:56,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:56,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:02:56,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:02:56,313 INFO L87 Difference]: Start difference. First operand 3907 states and 10011 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:59,197 INFO L93 Difference]: Finished difference Result 9734 states and 24667 transitions. [2021-06-05 23:02:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 23:02:59,197 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:02:59,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:59,206 INFO L225 Difference]: With dead ends: 9734 [2021-06-05 23:02:59,206 INFO L226 Difference]: Without dead ends: 9251 [2021-06-05 23:02:59,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4463 ImplicationChecksByTransitivity, 2637.4ms TimeCoverageRelationStatistics Valid=2117, Invalid=11455, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 23:02:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9251 states. [2021-06-05 23:02:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9251 to 4183. [2021-06-05 23:02:59,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.5516499282639886) internal successors, (10671), 4182 states have internal predecessors, (10671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 10671 transitions. [2021-06-05 23:02:59,286 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 10671 transitions. Word has length 37 [2021-06-05 23:02:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:59,286 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 10671 transitions. [2021-06-05 23:02:59,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 10671 transitions. [2021-06-05 23:02:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:59,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:59,293 INFO L554 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, 1, 1, 1] [2021-06-05 23:02:59,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 23:02:59,494 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:59,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1568060888, now seen corresponding path program 21 times [2021-06-05 23:02:59,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:59,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57590914] [2021-06-05 23:02:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:02:59,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:59,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57590914] [2021-06-05 23:02:59,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57590914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:59,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178121866] [2021-06-05 23:02:59,656 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:59,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:02:59,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:59,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:02:59,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:00,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:03:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:00,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:00,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:00,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 23:03:00,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:00,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:00,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:00,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:10 [2021-06-05 23:03:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:00,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178121866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:00,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:00,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-06-05 23:03:00,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495165369] [2021-06-05 23:03:00,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:03:00,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:00,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:03:00,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:03:00,213 INFO L87 Difference]: Start difference. First operand 4183 states and 10671 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:03,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:03,377 INFO L93 Difference]: Finished difference Result 10750 states and 26972 transitions. [2021-06-05 23:03:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 23:03:03,378 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:03:03,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:03,387 INFO L225 Difference]: With dead ends: 10750 [2021-06-05 23:03:03,387 INFO L226 Difference]: Without dead ends: 9874 [2021-06-05 23:03:03,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 2602.3ms TimeCoverageRelationStatistics Valid=1896, Invalid=9660, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 23:03:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-06-05 23:03:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 4281. [2021-06-05 23:03:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4281 states, 4280 states have (on average 2.549299065420561) internal successors, (10911), 4280 states have internal predecessors, (10911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 10911 transitions. [2021-06-05 23:03:03,487 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 10911 transitions. Word has length 37 [2021-06-05 23:03:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:03,487 INFO L482 AbstractCegarLoop]: Abstraction has 4281 states and 10911 transitions. [2021-06-05 23:03:03,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:03,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 10911 transitions. [2021-06-05 23:03:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:03:03,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:03,494 INFO L554 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, 1, 1, 1] [2021-06-05 23:03:03,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 23:03:03,709 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:03,709 INFO L82 PathProgramCache]: Analyzing trace with hash -62441724, now seen corresponding path program 22 times [2021-06-05 23:03:03,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:03,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967642941] [2021-06-05 23:03:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:03:03,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:03,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967642941] [2021-06-05 23:03:03,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967642941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:03,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803153119] [2021-06-05 23:03:03,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:03,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:03:03,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:03,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:03:03,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:04,274 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:04,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:03:04,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:04,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:04,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:04,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:03:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:04,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803153119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:04,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:04,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-06-05 23:03:04,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052664311] [2021-06-05 23:03:04,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:03:04,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:04,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:03:04,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:03:04,348 INFO L87 Difference]: Start difference. First operand 4281 states and 10911 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:07,963 INFO L93 Difference]: Finished difference Result 13721 states and 34563 transitions. [2021-06-05 23:03:07,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 23:03:07,964 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:03:07,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:07,977 INFO L225 Difference]: With dead ends: 13721 [2021-06-05 23:03:07,977 INFO L226 Difference]: Without dead ends: 13099 [2021-06-05 23:03:07,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5620 ImplicationChecksByTransitivity, 3050.3ms TimeCoverageRelationStatistics Valid=2290, Invalid=13460, Unknown=0, NotChecked=0, Total=15750 [2021-06-05 23:03:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13099 states. [2021-06-05 23:03:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13099 to 4423. [2021-06-05 23:03:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 2.545002261420172) internal successors, (11254), 4422 states have internal predecessors, (11254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 11254 transitions. [2021-06-05 23:03:08,093 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 11254 transitions. Word has length 37 [2021-06-05 23:03:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:08,093 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 11254 transitions. [2021-06-05 23:03:08,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 11254 transitions. [2021-06-05 23:03:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:03:08,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:08,101 INFO L554 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, 1, 1, 1] [2021-06-05 23:03:08,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:08,323 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:08,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:08,323 INFO L82 PathProgramCache]: Analyzing trace with hash 722217220, now seen corresponding path program 23 times [2021-06-05 23:03:08,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:08,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802467260] [2021-06-05 23:03:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:03:08,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:08,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802467260] [2021-06-05 23:03:08,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802467260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:08,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733632871] [2021-06-05 23:03:08,553 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:08,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:03:08,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:08,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:03:08,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:08,942 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:08,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:03:08,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:08,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:08,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:08,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:03:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:09,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733632871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:09,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:09,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-06-05 23:03:09,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888830148] [2021-06-05 23:03:09,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:03:09,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:09,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:03:09,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:03:09,017 INFO L87 Difference]: Start difference. First operand 4423 states and 11254 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:13,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:13,359 INFO L93 Difference]: Finished difference Result 14347 states and 36035 transitions. [2021-06-05 23:03:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 23:03:13,359 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:03:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:13,373 INFO L225 Difference]: With dead ends: 14347 [2021-06-05 23:03:13,373 INFO L226 Difference]: Without dead ends: 13341 [2021-06-05 23:03:13,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7884 ImplicationChecksByTransitivity, 3821.0ms TimeCoverageRelationStatistics Valid=3139, Invalid=17741, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 23:03:13,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-06-05 23:03:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 4643. [2021-06-05 23:03:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.5359758724687635) internal successors, (11772), 4642 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 11772 transitions. [2021-06-05 23:03:13,467 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 11772 transitions. Word has length 37 [2021-06-05 23:03:13,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:13,467 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 11772 transitions. [2021-06-05 23:03:13,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 11772 transitions. [2021-06-05 23:03:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 23:03:13,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:13,475 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:13,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 23:03:13,697 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:13,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:13,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2000668951, now seen corresponding path program 24 times [2021-06-05 23:03:13,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:13,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223430326] [2021-06-05 23:03:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:13,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:13,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223430326] [2021-06-05 23:03:13,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223430326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:13,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903460861] [2021-06-05 23:03:13,729 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:13,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:03:13,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:13,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:03:13,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:13,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903460861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:13,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:13,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 23:03:13,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145906298] [2021-06-05 23:03:13,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:03:13,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:13,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:03:13,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:03:13,836 INFO L87 Difference]: Start difference. First operand 4643 states and 11772 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:13,858 INFO L93 Difference]: Finished difference Result 5403 states and 13571 transitions. [2021-06-05 23:03:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:03:13,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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 40 [2021-06-05 23:03:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:13,863 INFO L225 Difference]: With dead ends: 5403 [2021-06-05 23:03:13,863 INFO L226 Difference]: Without dead ends: 5331 [2021-06-05 23:03:13,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:03:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5331 states. [2021-06-05 23:03:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5331 to 4801. [2021-06-05 23:03:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4801 states, 4800 states have (on average 2.536875) internal successors, (12177), 4800 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4801 states to 4801 states and 12177 transitions. [2021-06-05 23:03:13,915 INFO L78 Accepts]: Start accepts. Automaton has 4801 states and 12177 transitions. Word has length 40 [2021-06-05 23:03:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:13,915 INFO L482 AbstractCegarLoop]: Abstraction has 4801 states and 12177 transitions. [2021-06-05 23:03:13,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4801 states and 12177 transitions. [2021-06-05 23:03:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 23:03:13,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:13,925 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:14,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:14,138 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:14,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:14,138 INFO L82 PathProgramCache]: Analyzing trace with hash 336026460, now seen corresponding path program 25 times [2021-06-05 23:03:14,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:14,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110207258] [2021-06-05 23:03:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:03:14,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:14,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110207258] [2021-06-05 23:03:14,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110207258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:14,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22963497] [2021-06-05 23:03:14,338 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:14,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:03:14,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:14,823 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:14,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:03:14,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:14,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:14,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:14,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:03:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:14,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22963497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:14,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:14,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 32 [2021-06-05 23:03:14,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650158088] [2021-06-05 23:03:14,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:03:14,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:14,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:03:14,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:03:14,887 INFO L87 Difference]: Start difference. First operand 4801 states and 12177 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:17,338 INFO L93 Difference]: Finished difference Result 10636 states and 26811 transitions. [2021-06-05 23:03:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 23:03:17,338 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 23:03:17,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:17,349 INFO L225 Difference]: With dead ends: 10636 [2021-06-05 23:03:17,349 INFO L226 Difference]: Without dead ends: 10514 [2021-06-05 23:03:17,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 2185.5ms TimeCoverageRelationStatistics Valid=1395, Invalid=8111, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 23:03:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10514 states. [2021-06-05 23:03:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10514 to 4901. [2021-06-05 23:03:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4901 states, 4900 states have (on average 2.5353061224489797) internal successors, (12423), 4900 states have internal predecessors, (12423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4901 states to 4901 states and 12423 transitions. [2021-06-05 23:03:17,431 INFO L78 Accepts]: Start accepts. Automaton has 4901 states and 12423 transitions. Word has length 40 [2021-06-05 23:03:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:17,431 INFO L482 AbstractCegarLoop]: Abstraction has 4901 states and 12423 transitions. [2021-06-05 23:03:17,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4901 states and 12423 transitions. [2021-06-05 23:03:17,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:03:17,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:17,439 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:17,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 23:03:17,657 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:17,657 INFO L82 PathProgramCache]: Analyzing trace with hash -427758525, now seen corresponding path program 26 times [2021-06-05 23:03:17,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:17,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575163071] [2021-06-05 23:03:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:18,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:18,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575163071] [2021-06-05 23:03:18,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575163071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:18,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097312963] [2021-06-05 23:03:18,009 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:18,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:03:18,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:18,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:03:18,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:18,597 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:03:18,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:03:18,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:18,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:18,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:18,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:03:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:18,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097312963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:18,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:18,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:03:18,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447802189] [2021-06-05 23:03:18,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:03:18,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:18,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:03:18,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:03:18,699 INFO L87 Difference]: Start difference. First operand 4901 states and 12423 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:24,621 INFO L93 Difference]: Finished difference Result 12060 states and 30372 transitions. [2021-06-05 23:03:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-05 23:03:24,621 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:03:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:24,632 INFO L225 Difference]: With dead ends: 12060 [2021-06-05 23:03:24,632 INFO L226 Difference]: Without dead ends: 10909 [2021-06-05 23:03:24,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 4794.5ms TimeCoverageRelationStatistics Valid=3516, Invalid=21924, Unknown=0, NotChecked=0, Total=25440 [2021-06-05 23:03:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-06-05 23:03:24,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 5132. [2021-06-05 23:03:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5132 states, 5131 states have (on average 2.540050672383551) internal successors, (13033), 5131 states have internal predecessors, (13033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5132 states to 5132 states and 13033 transitions. [2021-06-05 23:03:24,735 INFO L78 Accepts]: Start accepts. Automaton has 5132 states and 13033 transitions. Word has length 43 [2021-06-05 23:03:24,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:24,735 INFO L482 AbstractCegarLoop]: Abstraction has 5132 states and 13033 transitions. [2021-06-05 23:03:24,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:24,735 INFO L276 IsEmpty]: Start isEmpty. Operand 5132 states and 13033 transitions. [2021-06-05 23:03:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:03:24,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:24,742 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:24,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:24,945 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:24,945 INFO L82 PathProgramCache]: Analyzing trace with hash 110708185, now seen corresponding path program 27 times [2021-06-05 23:03:24,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:24,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440007363] [2021-06-05 23:03:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:25,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:25,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440007363] [2021-06-05 23:03:25,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440007363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:25,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283288945] [2021-06-05 23:03:25,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:25,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:03:25,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:25,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 23:03:25,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:25,947 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:03:25,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:03:25,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:25,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:25,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:25,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:03:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:26,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283288945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:26,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:26,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:03:26,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204155658] [2021-06-05 23:03:26,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:03:26,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:26,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:03:26,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:03:26,023 INFO L87 Difference]: Start difference. First operand 5132 states and 13033 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:35,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:35,189 INFO L93 Difference]: Finished difference Result 14776 states and 37218 transitions. [2021-06-05 23:03:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-06-05 23:03:35,189 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:03:35,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:35,207 INFO L225 Difference]: With dead ends: 14776 [2021-06-05 23:03:35,207 INFO L226 Difference]: Without dead ends: 13670 [2021-06-05 23:03:35,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15990 ImplicationChecksByTransitivity, 7701.5ms TimeCoverageRelationStatistics Valid=6081, Invalid=37391, Unknown=0, NotChecked=0, Total=43472 [2021-06-05 23:03:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13670 states. [2021-06-05 23:03:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13670 to 5194. [2021-06-05 23:03:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5194 states, 5193 states have (on average 2.5407279029462737) internal successors, (13194), 5193 states have internal predecessors, (13194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 13194 transitions. [2021-06-05 23:03:35,297 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 13194 transitions. Word has length 43 [2021-06-05 23:03:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:35,298 INFO L482 AbstractCegarLoop]: Abstraction has 5194 states and 13194 transitions. [2021-06-05 23:03:35,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 13194 transitions. [2021-06-05 23:03:35,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:03:35,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:35,304 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:35,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 23:03:35,505 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:35,505 INFO L82 PathProgramCache]: Analyzing trace with hash -880659713, now seen corresponding path program 28 times [2021-06-05 23:03:35,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:35,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453674319] [2021-06-05 23:03:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:35,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:35,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453674319] [2021-06-05 23:03:35,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453674319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:35,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372750673] [2021-06-05 23:03:35,796 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:35,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:03:35,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:03:35,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:36,415 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:03:36,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:03:36,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:36,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:36,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:36,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:03:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:36,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372750673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:36,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:36,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:03:36,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159543028] [2021-06-05 23:03:36,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:03:36,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:36,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:03:36,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:03:36,536 INFO L87 Difference]: Start difference. First operand 5194 states and 13194 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:44,732 INFO L93 Difference]: Finished difference Result 14820 states and 37465 transitions. [2021-06-05 23:03:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-06-05 23:03:44,733 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:03:44,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:44,746 INFO L225 Difference]: With dead ends: 14820 [2021-06-05 23:03:44,746 INFO L226 Difference]: Without dead ends: 13932 [2021-06-05 23:03:44,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11848 ImplicationChecksByTransitivity, 6760.2ms TimeCoverageRelationStatistics Valid=4485, Invalid=30297, Unknown=0, NotChecked=0, Total=34782 [2021-06-05 23:03:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13932 states. [2021-06-05 23:03:44,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13932 to 5454. [2021-06-05 23:03:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.5464881716486336) internal successors, (13886), 5453 states have internal predecessors, (13886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13886 transitions. [2021-06-05 23:03:44,835 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13886 transitions. Word has length 43 [2021-06-05 23:03:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:44,835 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13886 transitions. [2021-06-05 23:03:44,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13886 transitions. [2021-06-05 23:03:44,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:03:44,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:44,840 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:45,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:45,044 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:45,044 INFO L82 PathProgramCache]: Analyzing trace with hash -764697707, now seen corresponding path program 29 times [2021-06-05 23:03:45,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:45,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778767116] [2021-06-05 23:03:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:45,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:45,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778767116] [2021-06-05 23:03:45,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778767116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:45,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945926377] [2021-06-05 23:03:45,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:45,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:03:45,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:45,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:03:45,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:46,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:46,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:46,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:46,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:03:46,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:46,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:46,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:46,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:46,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:46,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:03:46,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:46,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:46,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:03:46,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 23:03:46,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:46,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:46,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:46,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:10 [2021-06-05 23:03:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:46,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945926377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:46,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:46,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:03:46,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749996964] [2021-06-05 23:03:46,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:03:46,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:46,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:03:46,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:03:46,582 INFO L87 Difference]: Start difference. First operand 5454 states and 13886 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:57,580 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 23:03:58,511 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 23:04:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:13,373 INFO L93 Difference]: Finished difference Result 15621 states and 39738 transitions. [2021-06-05 23:04:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-05 23:04:13,373 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:04:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:13,389 INFO L225 Difference]: With dead ends: 15621 [2021-06-05 23:04:13,389 INFO L226 Difference]: Without dead ends: 14882 [2021-06-05 23:04:13,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12068 ImplicationChecksByTransitivity, 12098.0ms TimeCoverageRelationStatistics Valid=4072, Invalid=29967, Unknown=1, NotChecked=0, Total=34040 [2021-06-05 23:04:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14882 states. [2021-06-05 23:04:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14882 to 6016. [2021-06-05 23:04:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6015 states have (on average 2.5620947630922695) internal successors, (15411), 6015 states have internal predecessors, (15411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 15411 transitions. [2021-06-05 23:04:13,492 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 15411 transitions. Word has length 43 [2021-06-05 23:04:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:13,493 INFO L482 AbstractCegarLoop]: Abstraction has 6016 states and 15411 transitions. [2021-06-05 23:04:13,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 15411 transitions. [2021-06-05 23:04:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:04:13,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:13,498 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:13,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:13,698 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:13,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1773642173, now seen corresponding path program 30 times [2021-06-05 23:04:13,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:13,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251547231] [2021-06-05 23:04:13,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:14,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:14,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251547231] [2021-06-05 23:04:14,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251547231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:14,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685373992] [2021-06-05 23:04:14,003 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:14,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:04:14,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:14,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:04:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:14,605 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:04:14,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:04:14,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:14,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:14,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:14,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:04:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:14,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685373992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:14,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:14,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:04:14,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210720347] [2021-06-05 23:04:14,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:04:14,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:14,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:04:14,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:04:14,692 INFO L87 Difference]: Start difference. First operand 6016 states and 15411 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:25,830 INFO L93 Difference]: Finished difference Result 20637 states and 52374 transitions. [2021-06-05 23:04:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-06-05 23:04:25,830 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:04:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:25,849 INFO L225 Difference]: With dead ends: 20637 [2021-06-05 23:04:25,849 INFO L226 Difference]: Without dead ends: 18278 [2021-06-05 23:04:25,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24578 ImplicationChecksByTransitivity, 9469.0ms TimeCoverageRelationStatistics Valid=8601, Invalid=52161, Unknown=0, NotChecked=0, Total=60762 [2021-06-05 23:04:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18278 states. [2021-06-05 23:04:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18278 to 6142. [2021-06-05 23:04:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 6141 states have (on average 2.563100472235792) internal successors, (15740), 6141 states have internal predecessors, (15740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 15740 transitions. [2021-06-05 23:04:25,967 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 15740 transitions. Word has length 43 [2021-06-05 23:04:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:25,967 INFO L482 AbstractCegarLoop]: Abstraction has 6142 states and 15740 transitions. [2021-06-05 23:04:25,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:25,968 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 15740 transitions. [2021-06-05 23:04:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:04:25,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:25,974 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:26,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:26,174 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:26,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:26,175 INFO L82 PathProgramCache]: Analyzing trace with hash 875403101, now seen corresponding path program 31 times [2021-06-05 23:04:26,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:26,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249185524] [2021-06-05 23:04:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:26,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:26,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249185524] [2021-06-05 23:04:26,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249185524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:26,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464916833] [2021-06-05 23:04:26,474 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:26,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:04:26,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:27,043 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:04:27,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:04:27,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:27,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:27,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:27,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:04:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:27,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464916833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:27,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:27,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:04:27,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203269965] [2021-06-05 23:04:27,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:04:27,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:27,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:04:27,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:04:27,124 INFO L87 Difference]: Start difference. First operand 6142 states and 15740 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:37,215 INFO L93 Difference]: Finished difference Result 17902 states and 45508 transitions. [2021-06-05 23:04:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-06-05 23:04:37,216 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:04:37,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:37,234 INFO L225 Difference]: With dead ends: 17902 [2021-06-05 23:04:37,234 INFO L226 Difference]: Without dead ends: 16706 [2021-06-05 23:04:37,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20501 ImplicationChecksByTransitivity, 8359.0ms TimeCoverageRelationStatistics Valid=7171, Invalid=45499, Unknown=0, NotChecked=0, Total=52670 [2021-06-05 23:04:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16706 states. [2021-06-05 23:04:37,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16706 to 6404. [2021-06-05 23:04:37,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6404 states, 6403 states have (on average 2.567702639387787) internal successors, (16441), 6403 states have internal predecessors, (16441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6404 states to 6404 states and 16441 transitions. [2021-06-05 23:04:37,389 INFO L78 Accepts]: Start accepts. Automaton has 6404 states and 16441 transitions. Word has length 43 [2021-06-05 23:04:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:37,389 INFO L482 AbstractCegarLoop]: Abstraction has 6404 states and 16441 transitions. [2021-06-05 23:04:37,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 6404 states and 16441 transitions. [2021-06-05 23:04:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:04:37,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:37,396 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:37,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 23:04:37,597 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:37,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1672349977, now seen corresponding path program 32 times [2021-06-05 23:04:37,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:37,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907938987] [2021-06-05 23:04:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:38,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:38,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907938987] [2021-06-05 23:04:38,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907938987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:38,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065837260] [2021-06-05 23:04:38,038 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:38,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:04:38,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:38,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:04:38,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:38,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:04:38,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:04:38,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:04:38,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:04:38,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:04:38,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:04:38,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:04:38,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:04:38,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:04:38,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 23:04:38,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:38,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:38,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:38,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-06-05 23:04:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:38,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065837260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:38,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:38,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:04:38,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394198793] [2021-06-05 23:04:38,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:04:38,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:38,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:04:38,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:04:38,882 INFO L87 Difference]: Start difference. First operand 6404 states and 16441 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:47,871 INFO L93 Difference]: Finished difference Result 20466 states and 52270 transitions. [2021-06-05 23:04:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-06-05 23:04:47,871 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:04:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:47,893 INFO L225 Difference]: With dead ends: 20466 [2021-06-05 23:04:47,894 INFO L226 Difference]: Without dead ends: 18559 [2021-06-05 23:04:47,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17805 ImplicationChecksByTransitivity, 7261.3ms TimeCoverageRelationStatistics Valid=6025, Invalid=39131, Unknown=0, NotChecked=0, Total=45156 [2021-06-05 23:04:47,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18559 states. [2021-06-05 23:04:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18559 to 7142. [2021-06-05 23:04:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 2.563786584511973) internal successors, (18308), 7141 states have internal predecessors, (18308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 18308 transitions. [2021-06-05 23:04:48,060 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 18308 transitions. Word has length 43 [2021-06-05 23:04:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:48,060 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 18308 transitions. [2021-06-05 23:04:48,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 18308 transitions. [2021-06-05 23:04:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:04:48,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:48,070 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:48,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:48,270 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:48,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:48,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1747211427, now seen corresponding path program 33 times [2021-06-05 23:04:48,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:48,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111506003] [2021-06-05 23:04:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:48,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:48,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111506003] [2021-06-05 23:04:48,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111506003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:48,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995061772] [2021-06-05 23:04:48,575 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:48,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:04:48,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:48,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:04:48,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:49,161 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:04:49,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:04:49,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:49,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:49,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:49,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:04:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:49,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995061772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:49,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:49,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:04:49,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643776397] [2021-06-05 23:04:49,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:04:49,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:49,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:04:49,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:04:49,234 INFO L87 Difference]: Start difference. First operand 7142 states and 18308 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:56,242 INFO L93 Difference]: Finished difference Result 17841 states and 45530 transitions. [2021-06-05 23:04:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-06-05 23:04:56,242 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:04:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:56,260 INFO L225 Difference]: With dead ends: 17841 [2021-06-05 23:04:56,260 INFO L226 Difference]: Without dead ends: 17342 [2021-06-05 23:04:56,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13007 ImplicationChecksByTransitivity, 5680.3ms TimeCoverageRelationStatistics Valid=4015, Invalid=30767, Unknown=0, NotChecked=0, Total=34782 [2021-06-05 23:04:56,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17342 states. [2021-06-05 23:04:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17342 to 8284. [2021-06-05 23:04:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8283 states have (on average 2.5694796571290595) internal successors, (21283), 8283 states have internal predecessors, (21283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 21283 transitions. [2021-06-05 23:04:56,407 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 21283 transitions. Word has length 43 [2021-06-05 23:04:56,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:56,407 INFO L482 AbstractCegarLoop]: Abstraction has 8284 states and 21283 transitions. [2021-06-05 23:04:56,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 21283 transitions. [2021-06-05 23:04:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:04:56,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:56,416 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:56,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:56,636 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:56,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1084673731, now seen corresponding path program 34 times [2021-06-05 23:04:56,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:56,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42779043] [2021-06-05 23:04:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:04:56,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:56,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42779043] [2021-06-05 23:04:56,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42779043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:56,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080217892] [2021-06-05 23:04:56,879 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:56,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:04:56,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:56,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:04:56,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:57,435 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:04:57,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:04:57,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:57,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:57,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:57,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:04:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:57,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080217892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:57,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:57,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:04:57,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873685634] [2021-06-05 23:04:57,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:04:57,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:57,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:04:57,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:04:57,543 INFO L87 Difference]: Start difference. First operand 8284 states and 21283 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:07,351 INFO L93 Difference]: Finished difference Result 20442 states and 52162 transitions. [2021-06-05 23:05:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2021-06-05 23:05:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:05:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:07,373 INFO L225 Difference]: With dead ends: 20442 [2021-06-05 23:05:07,373 INFO L226 Difference]: Without dead ends: 19406 [2021-06-05 23:05:07,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18575 ImplicationChecksByTransitivity, 7532.4ms TimeCoverageRelationStatistics Valid=6094, Invalid=41212, Unknown=0, NotChecked=0, Total=47306 [2021-06-05 23:05:07,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19406 states. [2021-06-05 23:05:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19406 to 8918. [2021-06-05 23:05:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8918 states, 8917 states have (on average 2.5737355612874286) internal successors, (22950), 8917 states have internal predecessors, (22950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8918 states to 8918 states and 22950 transitions. [2021-06-05 23:05:07,608 INFO L78 Accepts]: Start accepts. Automaton has 8918 states and 22950 transitions. Word has length 43 [2021-06-05 23:05:07,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:07,608 INFO L482 AbstractCegarLoop]: Abstraction has 8918 states and 22950 transitions. [2021-06-05 23:05:07,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:07,609 INFO L276 IsEmpty]: Start isEmpty. Operand 8918 states and 22950 transitions. [2021-06-05 23:05:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:07,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:07,619 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:07,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 23:05:07,833 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:07,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1869332675, now seen corresponding path program 35 times [2021-06-05 23:05:07,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:07,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478300546] [2021-06-05 23:05:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:08,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:08,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478300546] [2021-06-05 23:05:08,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478300546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:08,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90561116] [2021-06-05 23:05:08,234 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:08,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:05:08,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:08,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:05:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:08,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:08,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:08,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:08,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:08,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:08,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:08,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:08,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:08,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:08,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:05:08,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:05:08,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:08,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:08,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:08,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:10 [2021-06-05 23:05:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:09,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90561116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:09,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:09,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:05:09,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900389231] [2021-06-05 23:05:09,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:05:09,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:09,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:05:09,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:05:09,012 INFO L87 Difference]: Start difference. First operand 8918 states and 22950 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:18,203 INFO L93 Difference]: Finished difference Result 23587 states and 60165 transitions. [2021-06-05 23:05:18,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2021-06-05 23:05:18,204 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:05:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:18,228 INFO L225 Difference]: With dead ends: 23587 [2021-06-05 23:05:18,228 INFO L226 Difference]: Without dead ends: 21831 [2021-06-05 23:05:18,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19157 ImplicationChecksByTransitivity, 7293.3ms TimeCoverageRelationStatistics Valid=5543, Invalid=41763, Unknown=0, NotChecked=0, Total=47306 [2021-06-05 23:05:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21831 states. [2021-06-05 23:05:18,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21831 to 10760. [2021-06-05 23:05:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10760 states, 10759 states have (on average 2.589924714192769) internal successors, (27865), 10759 states have internal predecessors, (27865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10760 states to 10760 states and 27865 transitions. [2021-06-05 23:05:18,430 INFO L78 Accepts]: Start accepts. Automaton has 10760 states and 27865 transitions. Word has length 43 [2021-06-05 23:05:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:18,430 INFO L482 AbstractCegarLoop]: Abstraction has 10760 states and 27865 transitions. [2021-06-05 23:05:18,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:18,430 INFO L276 IsEmpty]: Start isEmpty. Operand 10760 states and 27865 transitions. [2021-06-05 23:05:18,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:18,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:18,441 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:18,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:18,643 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:18,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1988274585, now seen corresponding path program 36 times [2021-06-05 23:05:18,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:18,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428977173] [2021-06-05 23:05:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:05:19,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:19,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428977173] [2021-06-05 23:05:19,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428977173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:19,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035087751] [2021-06-05 23:05:19,002 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:19,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:05:19,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:19,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:05:19,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:19,673 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:05:19,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:05:19,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:19,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:19,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:19,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:05:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:19,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035087751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:19,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:19,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 23:05:19,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424942034] [2021-06-05 23:05:19,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:05:19,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:19,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:05:19,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:05:19,745 INFO L87 Difference]: Start difference. First operand 10760 states and 27865 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:27,235 INFO L93 Difference]: Finished difference Result 22434 states and 57580 transitions. [2021-06-05 23:05:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-06-05 23:05:27,236 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:05:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:27,261 INFO L225 Difference]: With dead ends: 22434 [2021-06-05 23:05:27,262 INFO L226 Difference]: Without dead ends: 21334 [2021-06-05 23:05:27,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13996 ImplicationChecksByTransitivity, 5884.0ms TimeCoverageRelationStatistics Valid=3941, Invalid=31591, Unknown=0, NotChecked=0, Total=35532 [2021-06-05 23:05:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21334 states. [2021-06-05 23:05:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21334 to 12742. [2021-06-05 23:05:27,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12742 states, 12741 states have (on average 2.596028569186092) internal successors, (33076), 12741 states have internal predecessors, (33076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12742 states to 12742 states and 33076 transitions. [2021-06-05 23:05:27,489 INFO L78 Accepts]: Start accepts. Automaton has 12742 states and 33076 transitions. Word has length 43 [2021-06-05 23:05:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:27,489 INFO L482 AbstractCegarLoop]: Abstraction has 12742 states and 33076 transitions. [2021-06-05 23:05:27,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:27,489 INFO L276 IsEmpty]: Start isEmpty. Operand 12742 states and 33076 transitions. [2021-06-05 23:05:27,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:27,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:27,506 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:27,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 23:05:27,709 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:27,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:27,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1217725385, now seen corresponding path program 37 times [2021-06-05 23:05:27,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:27,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575740840] [2021-06-05 23:05:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:28,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:28,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575740840] [2021-06-05 23:05:28,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575740840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:28,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025093704] [2021-06-05 23:05:28,016 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:28,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:05:28,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:28,722 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:05:28,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:05:28,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:28,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:28,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:28,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:05:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:28,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025093704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:28,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:28,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:05:28,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241158076] [2021-06-05 23:05:28,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:05:28,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:05:28,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:05:28,811 INFO L87 Difference]: Start difference. First operand 12742 states and 33076 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:36,678 INFO L93 Difference]: Finished difference Result 32165 states and 83382 transitions. [2021-06-05 23:05:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-06-05 23:05:36,678 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:05:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:36,719 INFO L225 Difference]: With dead ends: 32165 [2021-06-05 23:05:36,719 INFO L226 Difference]: Without dead ends: 31312 [2021-06-05 23:05:36,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13281 ImplicationChecksByTransitivity, 6391.1ms TimeCoverageRelationStatistics Valid=4644, Invalid=31266, Unknown=0, NotChecked=0, Total=35910 [2021-06-05 23:05:36,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31312 states. [2021-06-05 23:05:37,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31312 to 13654. [2021-06-05 23:05:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13654 states, 13653 states have (on average 2.5966454259137186) internal successors, (35452), 13653 states have internal predecessors, (35452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:37,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13654 states to 13654 states and 35452 transitions. [2021-06-05 23:05:37,059 INFO L78 Accepts]: Start accepts. Automaton has 13654 states and 35452 transitions. Word has length 43 [2021-06-05 23:05:37,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:37,059 INFO L482 AbstractCegarLoop]: Abstraction has 13654 states and 35452 transitions. [2021-06-05 23:05:37,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 13654 states and 35452 transitions. [2021-06-05 23:05:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:37,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:37,073 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:37,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 23:05:37,273 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:37,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1101763379, now seen corresponding path program 38 times [2021-06-05 23:05:37,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:37,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823068810] [2021-06-05 23:05:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:37,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:37,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823068810] [2021-06-05 23:05:37,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823068810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:37,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426523323] [2021-06-05 23:05:37,544 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:37,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:05:37,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:37,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:05:37,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:38,091 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:05:38,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:05:38,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:38,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:38,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:38,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:05:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:38,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426523323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:38,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:38,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:05:38,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844443595] [2021-06-05 23:05:38,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:05:38,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:38,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:05:38,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:05:38,164 INFO L87 Difference]: Start difference. First operand 13654 states and 35452 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:44,952 INFO L93 Difference]: Finished difference Result 31006 states and 80485 transitions. [2021-06-05 23:05:44,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-06-05 23:05:44,952 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:05:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:44,992 INFO L225 Difference]: With dead ends: 31006 [2021-06-05 23:05:44,992 INFO L226 Difference]: Without dead ends: 30540 [2021-06-05 23:05:44,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11497 ImplicationChecksByTransitivity, 5189.0ms TimeCoverageRelationStatistics Valid=3867, Invalid=26583, Unknown=0, NotChecked=0, Total=30450 [2021-06-05 23:05:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30540 states. [2021-06-05 23:05:45,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30540 to 13812. [2021-06-05 23:05:45,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13812 states, 13811 states have (on average 2.600825429005865) internal successors, (35920), 13811 states have internal predecessors, (35920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13812 states to 13812 states and 35920 transitions. [2021-06-05 23:05:45,292 INFO L78 Accepts]: Start accepts. Automaton has 13812 states and 35920 transitions. Word has length 43 [2021-06-05 23:05:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:45,292 INFO L482 AbstractCegarLoop]: Abstraction has 13812 states and 35920 transitions. [2021-06-05 23:05:45,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 13812 states and 35920 transitions. [2021-06-05 23:05:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:45,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:45,308 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:45,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:45,513 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash -979642131, now seen corresponding path program 39 times [2021-06-05 23:05:45,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:45,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301065472] [2021-06-05 23:05:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:45,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:45,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301065472] [2021-06-05 23:05:45,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301065472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:45,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098620514] [2021-06-05 23:05:45,788 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:45,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:05:45,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:45,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:05:45,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:46,416 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:05:46,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:05:46,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:46,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:46,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:46,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:05:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:46,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098620514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:46,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:46,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:05:46,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207434893] [2021-06-05 23:05:46,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:05:46,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:46,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:05:46,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:05:46,493 INFO L87 Difference]: Start difference. First operand 13812 states and 35920 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:54,640 INFO L93 Difference]: Finished difference Result 36511 states and 95055 transitions. [2021-06-05 23:05:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-06-05 23:05:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:05:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:54,685 INFO L225 Difference]: With dead ends: 36511 [2021-06-05 23:05:54,685 INFO L226 Difference]: Without dead ends: 34823 [2021-06-05 23:05:54,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15877 ImplicationChecksByTransitivity, 6300.6ms TimeCoverageRelationStatistics Valid=5024, Invalid=34776, Unknown=0, NotChecked=0, Total=39800 [2021-06-05 23:05:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34823 states. [2021-06-05 23:05:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34823 to 15038. [2021-06-05 23:05:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15038 states, 15037 states have (on average 2.606969475294274) internal successors, (39201), 15037 states have internal predecessors, (39201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15038 states to 15038 states and 39201 transitions. [2021-06-05 23:05:54,997 INFO L78 Accepts]: Start accepts. Automaton has 15038 states and 39201 transitions. Word has length 43 [2021-06-05 23:05:54,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:54,998 INFO L482 AbstractCegarLoop]: Abstraction has 15038 states and 39201 transitions. [2021-06-05 23:05:54,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:54,998 INFO L276 IsEmpty]: Start isEmpty. Operand 15038 states and 39201 transitions. [2021-06-05 23:05:55,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:55,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:55,014 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:55,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 23:05:55,215 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:55,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:55,215 INFO L82 PathProgramCache]: Analyzing trace with hash -542282095, now seen corresponding path program 40 times [2021-06-05 23:05:55,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:55,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252688457] [2021-06-05 23:05:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:05:55,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:55,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252688457] [2021-06-05 23:05:55,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252688457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:55,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491258152] [2021-06-05 23:05:55,519 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:55,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:05:55,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:55,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:05:55,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:56,167 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:05:56,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:05:56,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:56,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:56,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:56,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:05:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:56,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491258152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:56,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:56,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 23:05:56,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176721700] [2021-06-05 23:05:56,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:05:56,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:56,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:05:56,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:05:56,237 INFO L87 Difference]: Start difference. First operand 15038 states and 39201 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:02,839 INFO L93 Difference]: Finished difference Result 33624 states and 87489 transitions. [2021-06-05 23:06:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-05 23:06:02,840 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:06:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:02,883 INFO L225 Difference]: With dead ends: 33624 [2021-06-05 23:06:02,883 INFO L226 Difference]: Without dead ends: 32372 [2021-06-05 23:06:02,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11409 ImplicationChecksByTransitivity, 5078.9ms TimeCoverageRelationStatistics Valid=3608, Invalid=25804, Unknown=0, NotChecked=0, Total=29412 [2021-06-05 23:06:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32372 states. [2021-06-05 23:06:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32372 to 14940. [2021-06-05 23:06:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14940 states, 14939 states have (on average 2.6187830510743693) internal successors, (39122), 14939 states have internal predecessors, (39122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14940 states to 14940 states and 39122 transitions. [2021-06-05 23:06:03,211 INFO L78 Accepts]: Start accepts. Automaton has 14940 states and 39122 transitions. Word has length 43 [2021-06-05 23:06:03,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:03,211 INFO L482 AbstractCegarLoop]: Abstraction has 14940 states and 39122 transitions. [2021-06-05 23:06:03,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:03,211 INFO L276 IsEmpty]: Start isEmpty. Operand 14940 states and 39122 transitions. [2021-06-05 23:06:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:03,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:03,229 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:03,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 23:06:03,430 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:03,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1709625473, now seen corresponding path program 41 times [2021-06-05 23:06:03,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:03,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860496369] [2021-06-05 23:06:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:03,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:03,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860496369] [2021-06-05 23:06:03,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860496369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:03,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103902438] [2021-06-05 23:06:03,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:03,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:06:03,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:03,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:06:03,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:04,330 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:06:04,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:06:04,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:04,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:04,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:04,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:06:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:04,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103902438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:04,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:04,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:06:04,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938203574] [2021-06-05 23:06:04,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:06:04,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:04,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:06:04,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:06:04,403 INFO L87 Difference]: Start difference. First operand 14940 states and 39122 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:12,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:12,443 INFO L93 Difference]: Finished difference Result 36476 states and 95769 transitions. [2021-06-05 23:06:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-06-05 23:06:12,444 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:06:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:12,489 INFO L225 Difference]: With dead ends: 36476 [2021-06-05 23:06:12,489 INFO L226 Difference]: Without dead ends: 34935 [2021-06-05 23:06:12,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14698 ImplicationChecksByTransitivity, 6161.9ms TimeCoverageRelationStatistics Valid=4399, Invalid=33043, Unknown=0, NotChecked=0, Total=37442 [2021-06-05 23:06:12,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34935 states. [2021-06-05 23:06:12,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34935 to 16690. [2021-06-05 23:06:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16690 states, 16689 states have (on average 2.6272994187788363) internal successors, (43847), 16689 states have internal predecessors, (43847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16690 states to 16690 states and 43847 transitions. [2021-06-05 23:06:12,789 INFO L78 Accepts]: Start accepts. Automaton has 16690 states and 43847 transitions. Word has length 43 [2021-06-05 23:06:12,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:12,789 INFO L482 AbstractCegarLoop]: Abstraction has 16690 states and 43847 transitions. [2021-06-05 23:06:12,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 16690 states and 43847 transitions. [2021-06-05 23:06:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:12,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:12,805 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:13,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 23:06:13,006 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash -509263027, now seen corresponding path program 42 times [2021-06-05 23:06:13,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:13,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769569948] [2021-06-05 23:06:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:06:13,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:13,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769569948] [2021-06-05 23:06:13,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769569948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:13,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79095551] [2021-06-05 23:06:13,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:13,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:06:13,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:13,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:06:13,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:13,814 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:06:13,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:06:13,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:13,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:13,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:13,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:06:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:13,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79095551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:13,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:13,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 23:06:13,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840859610] [2021-06-05 23:06:13,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:06:13,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:13,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:06:13,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:06:13,951 INFO L87 Difference]: Start difference. First operand 16690 states and 43847 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:20,003 INFO L93 Difference]: Finished difference Result 30990 states and 80539 transitions. [2021-06-05 23:06:20,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-06-05 23:06:20,003 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:06:20,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:20,044 INFO L225 Difference]: With dead ends: 30990 [2021-06-05 23:06:20,044 INFO L226 Difference]: Without dead ends: 29948 [2021-06-05 23:06:20,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10628 ImplicationChecksByTransitivity, 4733.0ms TimeCoverageRelationStatistics Valid=3180, Invalid=24542, Unknown=0, NotChecked=0, Total=27722 [2021-06-05 23:06:20,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29948 states. [2021-06-05 23:06:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29948 to 17300. [2021-06-05 23:06:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17300 states, 17299 states have (on average 2.6337360541071737) internal successors, (45561), 17299 states have internal predecessors, (45561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:20,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17300 states to 17300 states and 45561 transitions. [2021-06-05 23:06:20,346 INFO L78 Accepts]: Start accepts. Automaton has 17300 states and 45561 transitions. Word has length 43 [2021-06-05 23:06:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:20,347 INFO L482 AbstractCegarLoop]: Abstraction has 17300 states and 45561 transitions. [2021-06-05 23:06:20,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 17300 states and 45561 transitions. [2021-06-05 23:06:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:20,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:20,365 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:20,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:20,577 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:20,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2104375741, now seen corresponding path program 43 times [2021-06-05 23:06:20,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:20,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271059683] [2021-06-05 23:06:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:20,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:20,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271059683] [2021-06-05 23:06:20,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271059683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:20,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836732384] [2021-06-05 23:06:20,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:20,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:06:20,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:21,602 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:06:21,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:06:21,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:21,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:21,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:21,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:06:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:21,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836732384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:21,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:21,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:06:21,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303131714] [2021-06-05 23:06:21,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:06:21,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:21,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:06:21,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:06:21,678 INFO L87 Difference]: Start difference. First operand 17300 states and 45561 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:26,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:26,715 INFO L93 Difference]: Finished difference Result 37293 states and 97067 transitions. [2021-06-05 23:06:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 23:06:26,716 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:06:26,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:26,763 INFO L225 Difference]: With dead ends: 37293 [2021-06-05 23:06:26,763 INFO L226 Difference]: Without dead ends: 36869 [2021-06-05 23:06:26,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8047 ImplicationChecksByTransitivity, 4578.1ms TimeCoverageRelationStatistics Valid=3368, Invalid=20194, Unknown=0, NotChecked=0, Total=23562 [2021-06-05 23:06:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36869 states. [2021-06-05 23:06:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36869 to 18932. [2021-06-05 23:06:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18932 states, 18931 states have (on average 2.627700596904548) internal successors, (49745), 18931 states have internal predecessors, (49745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18932 states to 18932 states and 49745 transitions. [2021-06-05 23:06:27,114 INFO L78 Accepts]: Start accepts. Automaton has 18932 states and 49745 transitions. Word has length 43 [2021-06-05 23:06:27,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:27,114 INFO L482 AbstractCegarLoop]: Abstraction has 18932 states and 49745 transitions. [2021-06-05 23:06:27,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:27,114 INFO L276 IsEmpty]: Start isEmpty. Operand 18932 states and 49745 transitions. [2021-06-05 23:06:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:27,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:27,133 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:27,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 23:06:27,336 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:27,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:27,336 INFO L82 PathProgramCache]: Analyzing trace with hash 544669533, now seen corresponding path program 44 times [2021-06-05 23:06:27,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:27,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414341938] [2021-06-05 23:06:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:27,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:27,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414341938] [2021-06-05 23:06:27,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414341938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:27,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762895260] [2021-06-05 23:06:27,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:27,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:06:27,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:27,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:06:27,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:28,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:06:28,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:06:28,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:06:28,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:06:28,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:06:28,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:06:28,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:06:28,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:06:28,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:06:28,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 23:06:28,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:28,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:28,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:28,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-06-05 23:06:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:28,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762895260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:28,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:28,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:06:28,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137919861] [2021-06-05 23:06:28,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:06:28,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:28,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:06:28,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:06:28,410 INFO L87 Difference]: Start difference. First operand 18932 states and 49745 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:35,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:35,430 INFO L93 Difference]: Finished difference Result 39448 states and 103216 transitions. [2021-06-05 23:06:35,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-05 23:06:35,431 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:06:35,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:35,483 INFO L225 Difference]: With dead ends: 39448 [2021-06-05 23:06:35,483 INFO L226 Difference]: Without dead ends: 38630 [2021-06-05 23:06:35,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10922 ImplicationChecksByTransitivity, 5962.4ms TimeCoverageRelationStatistics Valid=4697, Invalid=25753, Unknown=0, NotChecked=0, Total=30450 [2021-06-05 23:06:35,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38630 states. [2021-06-05 23:06:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38630 to 19230. [2021-06-05 23:06:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19230 states, 19229 states have (on average 2.623953403713142) internal successors, (50456), 19229 states have internal predecessors, (50456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19230 states to 19230 states and 50456 transitions. [2021-06-05 23:06:35,851 INFO L78 Accepts]: Start accepts. Automaton has 19230 states and 50456 transitions. Word has length 43 [2021-06-05 23:06:35,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:35,851 INFO L482 AbstractCegarLoop]: Abstraction has 19230 states and 50456 transitions. [2021-06-05 23:06:35,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:35,851 INFO L276 IsEmpty]: Start isEmpty. Operand 19230 states and 50456 transitions. [2021-06-05 23:06:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:35,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:35,870 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:36,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 23:06:36,072 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:36,072 INFO L82 PathProgramCache]: Analyzing trace with hash -268346073, now seen corresponding path program 45 times [2021-06-05 23:06:36,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:36,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786748173] [2021-06-05 23:06:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:06:36,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:36,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786748173] [2021-06-05 23:06:36,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786748173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:36,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746549906] [2021-06-05 23:06:36,311 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:36,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:06:36,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:36,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:06:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:36,858 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:06:36,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:06:36,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:36,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:36,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:36,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:06:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:36,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746549906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:36,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:36,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 23:06:36,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863934701] [2021-06-05 23:06:36,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:06:36,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:06:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:06:36,925 INFO L87 Difference]: Start difference. First operand 19230 states and 50456 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:42,897 INFO L93 Difference]: Finished difference Result 39931 states and 104656 transitions. [2021-06-05 23:06:42,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-06-05 23:06:42,897 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:06:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:42,945 INFO L225 Difference]: With dead ends: 39931 [2021-06-05 23:06:42,946 INFO L226 Difference]: Without dead ends: 38867 [2021-06-05 23:06:42,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11020 ImplicationChecksByTransitivity, 4798.8ms TimeCoverageRelationStatistics Valid=3483, Invalid=24573, Unknown=0, NotChecked=0, Total=28056 [2021-06-05 23:06:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38867 states. [2021-06-05 23:06:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38867 to 21046. [2021-06-05 23:06:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21046 states, 21045 states have (on average 2.633071988595866) internal successors, (55413), 21045 states have internal predecessors, (55413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21046 states to 21046 states and 55413 transitions. [2021-06-05 23:06:43,335 INFO L78 Accepts]: Start accepts. Automaton has 21046 states and 55413 transitions. Word has length 43 [2021-06-05 23:06:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:43,335 INFO L482 AbstractCegarLoop]: Abstraction has 21046 states and 55413 transitions. [2021-06-05 23:06:43,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 21046 states and 55413 transitions. [2021-06-05 23:06:43,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:43,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:43,357 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:43,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 23:06:43,558 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:43,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:43,558 INFO L82 PathProgramCache]: Analyzing trace with hash 494656337, now seen corresponding path program 46 times [2021-06-05 23:06:43,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:43,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314466979] [2021-06-05 23:06:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:06:43,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:43,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314466979] [2021-06-05 23:06:43,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314466979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:43,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215374794] [2021-06-05 23:06:43,886 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:43,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:06:43,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:43,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:06:43,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:44,420 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:06:44,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:06:44,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:44,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:44,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:44,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:06:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:44,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215374794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:44,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:44,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 23:06:44,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165874953] [2021-06-05 23:06:44,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:06:44,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:44,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:06:44,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:06:44,486 INFO L87 Difference]: Start difference. First operand 21046 states and 55413 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:50,912 INFO L93 Difference]: Finished difference Result 40519 states and 105709 transitions. [2021-06-05 23:06:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-06-05 23:06:50,912 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:06:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:50,966 INFO L225 Difference]: With dead ends: 40519 [2021-06-05 23:06:50,966 INFO L226 Difference]: Without dead ends: 39385 [2021-06-05 23:06:50,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11957 ImplicationChecksByTransitivity, 4971.4ms TimeCoverageRelationStatistics Valid=3626, Invalid=26476, Unknown=0, NotChecked=0, Total=30102 [2021-06-05 23:06:51,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39385 states. [2021-06-05 23:06:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39385 to 21992. [2021-06-05 23:06:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21992 states, 21991 states have (on average 2.637442590150516) internal successors, (58000), 21991 states have internal predecessors, (58000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21992 states to 21992 states and 58000 transitions. [2021-06-05 23:06:51,402 INFO L78 Accepts]: Start accepts. Automaton has 21992 states and 58000 transitions. Word has length 43 [2021-06-05 23:06:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:51,402 INFO L482 AbstractCegarLoop]: Abstraction has 21992 states and 58000 transitions. [2021-06-05 23:06:51,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 21992 states and 58000 transitions. [2021-06-05 23:06:51,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:51,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:51,425 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:51,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-05 23:06:51,626 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:51,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:51,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1349265309, now seen corresponding path program 47 times [2021-06-05 23:06:51,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:51,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083888712] [2021-06-05 23:06:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:51,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:51,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083888712] [2021-06-05 23:06:51,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083888712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:51,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599715716] [2021-06-05 23:06:51,860 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:51,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:06:51,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:51,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:06:51,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:52,407 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:06:52,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:06:52,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:52,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:52,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:52,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:06:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:52,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599715716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:52,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:52,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:06:52,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416840998] [2021-06-05 23:06:52,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:06:52,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:52,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:06:52,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:06:52,476 INFO L87 Difference]: Start difference. First operand 21992 states and 58000 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:00,066 INFO L93 Difference]: Finished difference Result 53558 states and 141893 transitions. [2021-06-05 23:07:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-06-05 23:07:00,067 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:07:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:00,144 INFO L225 Difference]: With dead ends: 53558 [2021-06-05 23:07:00,144 INFO L226 Difference]: Without dead ends: 52355 [2021-06-05 23:07:00,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14187 ImplicationChecksByTransitivity, 6166.0ms TimeCoverageRelationStatistics Valid=5074, Invalid=31598, Unknown=0, NotChecked=0, Total=36672 [2021-06-05 23:07:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52355 states. [2021-06-05 23:07:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52355 to 22438. [2021-06-05 23:07:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22438 states, 22437 states have (on average 2.634398538128983) internal successors, (59108), 22437 states have internal predecessors, (59108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22438 states to 22438 states and 59108 transitions. [2021-06-05 23:07:00,746 INFO L78 Accepts]: Start accepts. Automaton has 22438 states and 59108 transitions. Word has length 43 [2021-06-05 23:07:00,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:00,746 INFO L482 AbstractCegarLoop]: Abstraction has 22438 states and 59108 transitions. [2021-06-05 23:07:00,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:00,746 INFO L276 IsEmpty]: Start isEmpty. Operand 22438 states and 59108 transitions. [2021-06-05 23:07:00,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:00,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:00,768 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:00,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:00,968 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:00,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:00,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1954334089, now seen corresponding path program 48 times [2021-06-05 23:07:00,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:00,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151288591] [2021-06-05 23:07:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:01,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:01,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151288591] [2021-06-05 23:07:01,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151288591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:01,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964057852] [2021-06-05 23:07:01,218 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:01,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:07:01,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:01,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:07:01,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:01,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:01,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:01,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:01,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:01,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:01,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:01,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:01,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:01,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:07:01,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 23:07:01,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:01,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:01,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:01,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-06-05 23:07:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:01,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964057852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:01,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:01,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:07:01,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862763723] [2021-06-05 23:07:01,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:07:01,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:01,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:07:01,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:07:01,918 INFO L87 Difference]: Start difference. First operand 22438 states and 59108 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:08,072 INFO L93 Difference]: Finished difference Result 42320 states and 111228 transitions. [2021-06-05 23:07:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 23:07:08,072 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:07:08,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:08,131 INFO L225 Difference]: With dead ends: 42320 [2021-06-05 23:07:08,131 INFO L226 Difference]: Without dead ends: 41609 [2021-06-05 23:07:08,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9951 ImplicationChecksByTransitivity, 4836.1ms TimeCoverageRelationStatistics Valid=3725, Invalid=23335, Unknown=0, NotChecked=0, Total=27060 [2021-06-05 23:07:08,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41609 states. [2021-06-05 23:07:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41609 to 23462. [2021-06-05 23:07:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23462 states, 23461 states have (on average 2.626699629171817) internal successors, (61625), 23461 states have internal predecessors, (61625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23462 states to 23462 states and 61625 transitions. [2021-06-05 23:07:08,617 INFO L78 Accepts]: Start accepts. Automaton has 23462 states and 61625 transitions. Word has length 43 [2021-06-05 23:07:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:08,617 INFO L482 AbstractCegarLoop]: Abstraction has 23462 states and 61625 transitions. [2021-06-05 23:07:08,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:08,617 INFO L276 IsEmpty]: Start isEmpty. Operand 23462 states and 61625 transitions. [2021-06-05 23:07:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:08,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:08,641 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:08,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 23:07:08,842 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1632170849, now seen corresponding path program 49 times [2021-06-05 23:07:08,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:08,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34236878] [2021-06-05 23:07:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:07:09,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:09,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34236878] [2021-06-05 23:07:09,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34236878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:09,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445849771] [2021-06-05 23:07:09,138 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:09,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:07:09,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:09,653 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:07:09,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:07:09,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:09,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:09,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:09,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:07:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:09,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445849771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:09,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:09,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 23:07:09,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070296830] [2021-06-05 23:07:09,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:07:09,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:09,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:07:09,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:07:09,717 INFO L87 Difference]: Start difference. First operand 23462 states and 61625 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:16,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:16,338 INFO L93 Difference]: Finished difference Result 44417 states and 116031 transitions. [2021-06-05 23:07:16,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-06-05 23:07:16,339 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:07:16,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:16,393 INFO L225 Difference]: With dead ends: 44417 [2021-06-05 23:07:16,394 INFO L226 Difference]: Without dead ends: 43235 [2021-06-05 23:07:16,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13733 ImplicationChecksByTransitivity, 5292.9ms TimeCoverageRelationStatistics Valid=4150, Invalid=29890, Unknown=0, NotChecked=0, Total=34040 [2021-06-05 23:07:16,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43235 states. [2021-06-05 23:07:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43235 to 21862. [2021-06-05 23:07:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21862 states, 21861 states have (on average 2.6247198206852387) internal successors, (57379), 21861 states have internal predecessors, (57379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21862 states to 21862 states and 57379 transitions. [2021-06-05 23:07:16,801 INFO L78 Accepts]: Start accepts. Automaton has 21862 states and 57379 transitions. Word has length 43 [2021-06-05 23:07:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:16,801 INFO L482 AbstractCegarLoop]: Abstraction has 21862 states and 57379 transitions. [2021-06-05 23:07:16,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 21862 states and 57379 transitions. [2021-06-05 23:07:16,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:16,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:16,827 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:17,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:17,027 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:17,028 INFO L82 PathProgramCache]: Analyzing trace with hash 446049553, now seen corresponding path program 50 times [2021-06-05 23:07:17,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:17,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323641693] [2021-06-05 23:07:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:07:17,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:17,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323641693] [2021-06-05 23:07:17,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323641693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:17,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356504840] [2021-06-05 23:07:17,240 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:17,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:07:17,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:17,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:07:17,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:17,760 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:07:17,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:07:17,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:17,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:17,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:17,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:07:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:17,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356504840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:17,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:17,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 23:07:17,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296664912] [2021-06-05 23:07:17,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:07:17,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:17,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:07:17,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:07:17,842 INFO L87 Difference]: Start difference. First operand 21862 states and 57379 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:24,296 INFO L93 Difference]: Finished difference Result 52606 states and 136330 transitions. [2021-06-05 23:07:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-06-05 23:07:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:07:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:24,378 INFO L225 Difference]: With dead ends: 52606 [2021-06-05 23:07:24,378 INFO L226 Difference]: Without dead ends: 52287 [2021-06-05 23:07:24,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10927 ImplicationChecksByTransitivity, 5216.5ms TimeCoverageRelationStatistics Valid=3986, Invalid=26116, Unknown=0, NotChecked=0, Total=30102 [2021-06-05 23:07:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52287 states. [2021-06-05 23:07:24,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52287 to 22552. [2021-06-05 23:07:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22552 states, 22551 states have (on average 2.6213471686399714) internal successors, (59114), 22551 states have internal predecessors, (59114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:24,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22552 states to 22552 states and 59114 transitions. [2021-06-05 23:07:24,850 INFO L78 Accepts]: Start accepts. Automaton has 22552 states and 59114 transitions. Word has length 43 [2021-06-05 23:07:24,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:24,850 INFO L482 AbstractCegarLoop]: Abstraction has 22552 states and 59114 transitions. [2021-06-05 23:07:24,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:24,850 INFO L276 IsEmpty]: Start isEmpty. Operand 22552 states and 59114 transitions. [2021-06-05 23:07:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:24,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:24,872 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:25,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 23:07:25,077 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1890627837, now seen corresponding path program 51 times [2021-06-05 23:07:25,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:25,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584215695] [2021-06-05 23:07:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:07:25,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:25,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584215695] [2021-06-05 23:07:25,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584215695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:25,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897633889] [2021-06-05 23:07:25,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:25,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:07:25,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:25,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:07:25,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:25,816 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:07:25,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:07:25,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:25,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:25,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:25,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:07:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:25,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897633889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:25,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:25,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-06-05 23:07:25,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569161518] [2021-06-05 23:07:25,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:07:25,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:25,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:07:25,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:07:25,884 INFO L87 Difference]: Start difference. First operand 22552 states and 59114 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:32,652 INFO L93 Difference]: Finished difference Result 52725 states and 138064 transitions. [2021-06-05 23:07:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 23:07:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:07:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:32,726 INFO L225 Difference]: With dead ends: 52725 [2021-06-05 23:07:32,726 INFO L226 Difference]: Without dead ends: 52097 [2021-06-05 23:07:32,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11810 ImplicationChecksByTransitivity, 5439.8ms TimeCoverageRelationStatistics Valid=4212, Invalid=26940, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 23:07:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52097 states. [2021-06-05 23:07:33,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52097 to 25356. [2021-06-05 23:07:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25356 states, 25355 states have (on average 2.6195227765726683) internal successors, (66418), 25355 states have internal predecessors, (66418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25356 states to 25356 states and 66418 transitions. [2021-06-05 23:07:33,270 INFO L78 Accepts]: Start accepts. Automaton has 25356 states and 66418 transitions. Word has length 43 [2021-06-05 23:07:33,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:33,270 INFO L482 AbstractCegarLoop]: Abstraction has 25356 states and 66418 transitions. [2021-06-05 23:07:33,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:33,270 INFO L276 IsEmpty]: Start isEmpty. Operand 25356 states and 66418 transitions. [2021-06-05 23:07:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:33,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:33,295 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:33,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 23:07:33,495 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:33,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:33,496 INFO L82 PathProgramCache]: Analyzing trace with hash 821149183, now seen corresponding path program 52 times [2021-06-05 23:07:33,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:33,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304101419] [2021-06-05 23:07:33,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:07:33,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:33,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304101419] [2021-06-05 23:07:33,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304101419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:33,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489375514] [2021-06-05 23:07:33,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:33,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:07:33,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:33,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:07:33,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:34,382 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-06-05 23:07:34,465 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:07:34,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:07:34,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:34,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:34,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:34,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:07:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:34,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489375514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:34,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:34,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-06-05 23:07:34,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379455694] [2021-06-05 23:07:34,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:07:34,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:34,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:07:34,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:07:34,530 INFO L87 Difference]: Start difference. First operand 25356 states and 66418 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:42,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:42,486 INFO L93 Difference]: Finished difference Result 51875 states and 136134 transitions. [2021-06-05 23:07:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-05 23:07:42,487 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:07:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:42,564 INFO L225 Difference]: With dead ends: 51875 [2021-06-05 23:07:42,564 INFO L226 Difference]: Without dead ends: 50985 [2021-06-05 23:07:42,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14878 ImplicationChecksByTransitivity, 6452.9ms TimeCoverageRelationStatistics Valid=4543, Invalid=33287, Unknown=0, NotChecked=0, Total=37830 [2021-06-05 23:07:42,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50985 states. [2021-06-05 23:07:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50985 to 30858. [2021-06-05 23:07:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30858 states, 30857 states have (on average 2.614868587354571) internal successors, (80687), 30857 states have internal predecessors, (80687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30858 states to 30858 states and 80687 transitions. [2021-06-05 23:07:43,214 INFO L78 Accepts]: Start accepts. Automaton has 30858 states and 80687 transitions. Word has length 43 [2021-06-05 23:07:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:43,214 INFO L482 AbstractCegarLoop]: Abstraction has 30858 states and 80687 transitions. [2021-06-05 23:07:43,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 30858 states and 80687 transitions. [2021-06-05 23:07:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:43,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:43,247 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:43,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:43,448 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:43,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:43,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1239161813, now seen corresponding path program 53 times [2021-06-05 23:07:43,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:43,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503504272] [2021-06-05 23:07:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:43,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:43,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503504272] [2021-06-05 23:07:43,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503504272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:43,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206884911] [2021-06-05 23:07:43,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:43,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:07:43,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:43,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 23:07:43,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:44,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:44,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:44,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:07:44,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:44,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:44,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:44,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:44,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:44,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:44,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:44,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:44,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:44,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:07:44,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:07:44,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 23:07:44,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:44,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:44,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:44,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:10 [2021-06-05 23:07:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:44,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206884911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:44,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:44,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:07:44,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118811528] [2021-06-05 23:07:44,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:07:44,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:44,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:07:44,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:07:44,612 INFO L87 Difference]: Start difference. First operand 30858 states and 80687 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:52,391 INFO L93 Difference]: Finished difference Result 76344 states and 199558 transitions. [2021-06-05 23:07:52,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-05 23:07:52,392 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:07:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:52,511 INFO L225 Difference]: With dead ends: 76344 [2021-06-05 23:07:52,511 INFO L226 Difference]: Without dead ends: 75918 [2021-06-05 23:07:52,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10917 ImplicationChecksByTransitivity, 5781.0ms TimeCoverageRelationStatistics Valid=3708, Invalid=26048, Unknown=0, NotChecked=0, Total=29756 [2021-06-05 23:07:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75918 states. [2021-06-05 23:07:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75918 to 34178. [2021-06-05 23:07:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34178 states, 34177 states have (on average 2.6042952863036546) internal successors, (89007), 34177 states have internal predecessors, (89007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:53,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34178 states to 34178 states and 89007 transitions. [2021-06-05 23:07:53,354 INFO L78 Accepts]: Start accepts. Automaton has 34178 states and 89007 transitions. Word has length 43 [2021-06-05 23:07:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:53,354 INFO L482 AbstractCegarLoop]: Abstraction has 34178 states and 89007 transitions. [2021-06-05 23:07:53,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 34178 states and 89007 transitions. [2021-06-05 23:07:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:53,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:53,390 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:53,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:53,593 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:53,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2064437585, now seen corresponding path program 54 times [2021-06-05 23:07:53,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:53,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296057442] [2021-06-05 23:07:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:53,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:53,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296057442] [2021-06-05 23:07:53,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296057442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:53,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310908881] [2021-06-05 23:07:53,858 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:53,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:07:53,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:53,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:07:53,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:54,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:54,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:54,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:54,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:54,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:54,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:07:54,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:07:54,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:54,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:54,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:54,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:54,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:07:54,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 23:07:54,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:54,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:54,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:54,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-06-05 23:07:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:54,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310908881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:54,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:54,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:07:54,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356618663] [2021-06-05 23:07:54,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:07:54,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:54,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:07:54,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:07:54,676 INFO L87 Difference]: Start difference. First operand 34178 states and 89007 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:00,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:00,884 INFO L93 Difference]: Finished difference Result 58808 states and 153180 transitions. [2021-06-05 23:08:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-05 23:08:00,885 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:08:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:00,968 INFO L225 Difference]: With dead ends: 58808 [2021-06-05 23:08:00,969 INFO L226 Difference]: Without dead ends: 58636 [2021-06-05 23:08:00,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7629 ImplicationChecksByTransitivity, 4826.5ms TimeCoverageRelationStatistics Valid=3127, Invalid=18925, Unknown=0, NotChecked=0, Total=22052 [2021-06-05 23:08:01,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58636 states. [2021-06-05 23:08:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58636 to 32974. [2021-06-05 23:08:01,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32974 states, 32973 states have (on average 2.6076790100991722) internal successors, (85983), 32973 states have internal predecessors, (85983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32974 states to 32974 states and 85983 transitions. [2021-06-05 23:08:01,681 INFO L78 Accepts]: Start accepts. Automaton has 32974 states and 85983 transitions. Word has length 43 [2021-06-05 23:08:01,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:01,681 INFO L482 AbstractCegarLoop]: Abstraction has 32974 states and 85983 transitions. [2021-06-05 23:08:01,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:01,681 INFO L276 IsEmpty]: Start isEmpty. Operand 32974 states and 85983 transitions. [2021-06-05 23:08:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:08:01,716 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:01,716 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:01,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 23:08:01,916 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:01,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:01,917 INFO L82 PathProgramCache]: Analyzing trace with hash -16448189, now seen corresponding path program 55 times [2021-06-05 23:08:01,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:01,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321469945] [2021-06-05 23:08:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:08:02,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321469945] [2021-06-05 23:08:02,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321469945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32705291] [2021-06-05 23:08:02,117 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:02,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:08:02,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:02,623 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:08:02,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:08:02,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:02,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:02,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:02,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:08:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:02,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32705291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:02,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:02,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-06-05 23:08:02,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350871186] [2021-06-05 23:08:02,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:08:02,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:02,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:08:02,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:08:02,691 INFO L87 Difference]: Start difference. First operand 32974 states and 85983 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:08,151 INFO L93 Difference]: Finished difference Result 54518 states and 141071 transitions. [2021-06-05 23:08:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-05 23:08:08,152 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:08:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:08,230 INFO L225 Difference]: With dead ends: 54518 [2021-06-05 23:08:08,230 INFO L226 Difference]: Without dead ends: 54068 [2021-06-05 23:08:08,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8388 ImplicationChecksByTransitivity, 4487.7ms TimeCoverageRelationStatistics Valid=3168, Invalid=20088, Unknown=0, NotChecked=0, Total=23256 [2021-06-05 23:08:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54068 states. [2021-06-05 23:08:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54068 to 33126. [2021-06-05 23:08:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33126 states, 33125 states have (on average 2.6063396226415096) internal successors, (86335), 33125 states have internal predecessors, (86335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33126 states to 33126 states and 86335 transitions. [2021-06-05 23:08:08,843 INFO L78 Accepts]: Start accepts. Automaton has 33126 states and 86335 transitions. Word has length 43 [2021-06-05 23:08:08,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:08,843 INFO L482 AbstractCegarLoop]: Abstraction has 33126 states and 86335 transitions. [2021-06-05 23:08:08,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 33126 states and 86335 transitions. [2021-06-05 23:08:08,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:08:08,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:08,878 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:09,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:09,079 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:09,079 INFO L82 PathProgramCache]: Analyzing trace with hash 768210755, now seen corresponding path program 56 times [2021-06-05 23:08:09,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:09,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465860890] [2021-06-05 23:08:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:08:09,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:09,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465860890] [2021-06-05 23:08:09,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465860890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:09,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424274760] [2021-06-05 23:08:09,326 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:09,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:08:09,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:09,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:08:09,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:09,622 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 23:08:09,989 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:08:09,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:08:09,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:09,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:09,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:09,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:08:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:10,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424274760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:10,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:10,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-06-05 23:08:10,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711395422] [2021-06-05 23:08:10,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:08:10,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:10,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:08:10,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:08:10,056 INFO L87 Difference]: Start difference. First operand 33126 states and 86335 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:16,568 INFO L93 Difference]: Finished difference Result 56520 states and 146433 transitions. [2021-06-05 23:08:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 23:08:16,568 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:08:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:16,650 INFO L225 Difference]: With dead ends: 56520 [2021-06-05 23:08:16,650 INFO L226 Difference]: Without dead ends: 56166 [2021-06-05 23:08:16,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11908 ImplicationChecksByTransitivity, 5310.1ms TimeCoverageRelationStatistics Valid=3892, Invalid=27260, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 23:08:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56166 states. [2021-06-05 23:08:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56166 to 33074. [2021-06-05 23:08:17,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33074 states, 33073 states have (on average 2.6075650833005777) internal successors, (86240), 33073 states have internal predecessors, (86240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33074 states to 33074 states and 86240 transitions. [2021-06-05 23:08:17,281 INFO L78 Accepts]: Start accepts. Automaton has 33074 states and 86240 transitions. Word has length 43 [2021-06-05 23:08:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:17,281 INFO L482 AbstractCegarLoop]: Abstraction has 33074 states and 86240 transitions. [2021-06-05 23:08:17,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 33074 states and 86240 transitions. [2021-06-05 23:08:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:08:17,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:17,317 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:17,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:17,518 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:17,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:17,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1813418433, now seen corresponding path program 57 times [2021-06-05 23:08:17,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:17,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214777372] [2021-06-05 23:08:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:17,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:17,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214777372] [2021-06-05 23:08:17,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214777372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:17,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530425167] [2021-06-05 23:08:17,787 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:17,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:08:17,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:17,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:08:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:18,344 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:08:18,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:08:18,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:18,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:18,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:18,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:08:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:18,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530425167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:18,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:18,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:08:18,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809559867] [2021-06-05 23:08:18,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:08:18,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:18,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:08:18,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:08:18,421 INFO L87 Difference]: Start difference. First operand 33074 states and 86240 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:22,840 INFO L93 Difference]: Finished difference Result 51180 states and 133041 transitions. [2021-06-05 23:08:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 23:08:22,841 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:08:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:22,917 INFO L225 Difference]: With dead ends: 51180 [2021-06-05 23:08:22,917 INFO L226 Difference]: Without dead ends: 50194 [2021-06-05 23:08:22,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5914 ImplicationChecksByTransitivity, 3675.3ms TimeCoverageRelationStatistics Valid=2552, Invalid=15270, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 23:08:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50194 states. [2021-06-05 23:08:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50194 to 34498. [2021-06-05 23:08:23,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34498 states, 34497 states have (on average 2.606052700234803) internal successors, (89901), 34497 states have internal predecessors, (89901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34498 states to 34498 states and 89901 transitions. [2021-06-05 23:08:23,708 INFO L78 Accepts]: Start accepts. Automaton has 34498 states and 89901 transitions. Word has length 43 [2021-06-05 23:08:23,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:23,708 INFO L482 AbstractCegarLoop]: Abstraction has 34498 states and 89901 transitions. [2021-06-05 23:08:23,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:23,708 INFO L276 IsEmpty]: Start isEmpty. Operand 34498 states and 89901 transitions. [2021-06-05 23:08:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:08:23,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:23,744 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:23,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:23,945 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash 835626841, now seen corresponding path program 58 times [2021-06-05 23:08:23,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:23,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789248275] [2021-06-05 23:08:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:24,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:24,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789248275] [2021-06-05 23:08:24,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789248275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:24,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881117439] [2021-06-05 23:08:24,418 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:24,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:08:24,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:24,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:08:24,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:24,973 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:08:24,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:08:24,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:24,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:24,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:24,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:08:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:25,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881117439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:25,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:25,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:08:25,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757321569] [2021-06-05 23:08:25,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:08:25,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:25,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:08:25,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:08:25,047 INFO L87 Difference]: Start difference. First operand 34498 states and 89901 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:30,107 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 23:08:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:31,210 INFO L93 Difference]: Finished difference Result 50970 states and 132040 transitions. [2021-06-05 23:08:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-05 23:08:31,210 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:08:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:31,276 INFO L225 Difference]: With dead ends: 50970 [2021-06-05 23:08:31,276 INFO L226 Difference]: Without dead ends: 50500 [2021-06-05 23:08:31,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9667 ImplicationChecksByTransitivity, 5621.0ms TimeCoverageRelationStatistics Valid=4304, Invalid=22756, Unknown=0, NotChecked=0, Total=27060 [2021-06-05 23:08:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50500 states. [2021-06-05 23:08:31,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50500 to 34480. [2021-06-05 23:08:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34480 states, 34479 states have (on average 2.6040198381623596) internal successors, (89784), 34479 states have internal predecessors, (89784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34480 states to 34480 states and 89784 transitions. [2021-06-05 23:08:31,977 INFO L78 Accepts]: Start accepts. Automaton has 34480 states and 89784 transitions. Word has length 43 [2021-06-05 23:08:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:31,977 INFO L482 AbstractCegarLoop]: Abstraction has 34480 states and 89784 transitions. [2021-06-05 23:08:31,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 34480 states and 89784 transitions. [2021-06-05 23:08:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:08:32,015 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:32,015 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:32,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 23:08:32,216 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:32,216 INFO L82 PathProgramCache]: Analyzing trace with hash -155741057, now seen corresponding path program 59 times [2021-06-05 23:08:32,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:32,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997078186] [2021-06-05 23:08:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:32,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:32,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997078186] [2021-06-05 23:08:32,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997078186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:32,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329445865] [2021-06-05 23:08:32,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:32,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:08:32,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:32,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:08:32,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:33,302 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:08:33,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:08:33,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:33,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:33,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:33,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:08:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:33,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329445865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:33,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:33,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:08:33,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877199473] [2021-06-05 23:08:33,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:08:33,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:33,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:08:33,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:08:33,390 INFO L87 Difference]: Start difference. First operand 34480 states and 89784 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:39,140 INFO L93 Difference]: Finished difference Result 50258 states and 130327 transitions. [2021-06-05 23:08:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-05 23:08:39,140 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:08:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:39,208 INFO L225 Difference]: With dead ends: 50258 [2021-06-05 23:08:39,208 INFO L226 Difference]: Without dead ends: 49346 [2021-06-05 23:08:39,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7705 ImplicationChecksByTransitivity, 5044.7ms TimeCoverageRelationStatistics Valid=3493, Invalid=19157, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 23:08:39,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49346 states. [2021-06-05 23:08:39,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49346 to 34988. [2021-06-05 23:08:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34988 states, 34987 states have (on average 2.5989939120244663) internal successors, (90931), 34987 states have internal predecessors, (90931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34988 states to 34988 states and 90931 transitions. [2021-06-05 23:08:39,903 INFO L78 Accepts]: Start accepts. Automaton has 34988 states and 90931 transitions. Word has length 43 [2021-06-05 23:08:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:39,903 INFO L482 AbstractCegarLoop]: Abstraction has 34988 states and 90931 transitions. [2021-06-05 23:08:39,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 34988 states and 90931 transitions. [2021-06-05 23:08:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:08:39,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:39,941 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:40,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:40,141 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:40,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1440813171, now seen corresponding path program 60 times [2021-06-05 23:08:40,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:40,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656673396] [2021-06-05 23:08:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:40,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:40,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656673396] [2021-06-05 23:08:40,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656673396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:40,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328845498] [2021-06-05 23:08:40,515 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:40,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:08:40,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:40,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 23:08:40,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:41,055 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:08:41,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:08:41,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:41,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:41,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:41,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:08:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:41,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328845498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:41,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:41,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:08:41,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949971341] [2021-06-05 23:08:41,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:08:41,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:41,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:08:41,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:08:41,125 INFO L87 Difference]: Start difference. First operand 34988 states and 90931 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:46,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:46,291 INFO L93 Difference]: Finished difference Result 66217 states and 172225 transitions. [2021-06-05 23:08:46,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 23:08:46,292 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:08:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:46,386 INFO L225 Difference]: With dead ends: 66217 [2021-06-05 23:08:46,386 INFO L226 Difference]: Without dead ends: 65095 [2021-06-05 23:08:46,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7329 ImplicationChecksByTransitivity, 3904.4ms TimeCoverageRelationStatistics Valid=2811, Invalid=18069, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 23:08:46,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65095 states. [2021-06-05 23:08:47,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65095 to 36274. [2021-06-05 23:08:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36274 states, 36273 states have (on average 2.5966696992253193) internal successors, (94189), 36273 states have internal predecessors, (94189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36274 states to 36274 states and 94189 transitions. [2021-06-05 23:08:47,275 INFO L78 Accepts]: Start accepts. Automaton has 36274 states and 94189 transitions. Word has length 43 [2021-06-05 23:08:47,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:47,275 INFO L482 AbstractCegarLoop]: Abstraction has 36274 states and 94189 transitions. [2021-06-05 23:08:47,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:47,275 INFO L276 IsEmpty]: Start isEmpty. Operand 36274 states and 94189 transitions. [2021-06-05 23:08:47,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:08:47,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:47,312 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:47,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:47,513 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:47,514 INFO L82 PathProgramCache]: Analyzing trace with hash -421896627, now seen corresponding path program 61 times [2021-06-05 23:08:47,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:47,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238769948] [2021-06-05 23:08:47,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:47,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:47,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238769948] [2021-06-05 23:08:47,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238769948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:47,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969036221] [2021-06-05 23:08:47,895 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:47,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:08:47,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:48,477 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:08:48,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:08:48,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:48,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:48,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:48,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:08:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:48,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969036221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:48,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:48,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:08:48,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291763286] [2021-06-05 23:08:48,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:08:48,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:48,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:08:48,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:08:48,554 INFO L87 Difference]: Start difference. First operand 36274 states and 94189 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:55,543 INFO L93 Difference]: Finished difference Result 69190 states and 180203 transitions. [2021-06-05 23:08:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-06-05 23:08:55,544 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:08:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:55,641 INFO L225 Difference]: With dead ends: 69190 [2021-06-05 23:08:55,641 INFO L226 Difference]: Without dead ends: 68489 [2021-06-05 23:08:55,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11327 ImplicationChecksByTransitivity, 5759.8ms TimeCoverageRelationStatistics Valid=4164, Invalid=26636, Unknown=0, NotChecked=0, Total=30800 [2021-06-05 23:08:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68489 states. [2021-06-05 23:08:56,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68489 to 41444. [2021-06-05 23:08:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41444 states, 41443 states have (on average 2.5922109885867335) internal successors, (107429), 41443 states have internal predecessors, (107429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41444 states to 41444 states and 107429 transitions. [2021-06-05 23:08:56,640 INFO L78 Accepts]: Start accepts. Automaton has 41444 states and 107429 transitions. Word has length 43 [2021-06-05 23:08:56,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:56,640 INFO L482 AbstractCegarLoop]: Abstraction has 41444 states and 107429 transitions. [2021-06-05 23:08:56,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 41444 states and 107429 transitions. [2021-06-05 23:08:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:08:56,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:56,684 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:56,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:56,885 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:56,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1254279549, now seen corresponding path program 62 times [2021-06-05 23:08:56,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:56,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405120582] [2021-06-05 23:08:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:08:57,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:57,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405120582] [2021-06-05 23:08:57,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405120582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:57,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449485875] [2021-06-05 23:08:57,100 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:57,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:08:57,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:57,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:08:57,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:57,682 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:08:57,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:08:57,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:57,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:57,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:57,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:08:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:57,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449485875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:57,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:57,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:08:57,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564707816] [2021-06-05 23:08:57,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:08:57,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:57,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:08:57,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:08:57,754 INFO L87 Difference]: Start difference. First operand 41444 states and 107429 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:05,964 INFO L93 Difference]: Finished difference Result 82935 states and 213989 transitions. [2021-06-05 23:09:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-06-05 23:09:05,964 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:09:05,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:06,085 INFO L225 Difference]: With dead ends: 82935 [2021-06-05 23:09:06,085 INFO L226 Difference]: Without dead ends: 82258 [2021-06-05 23:09:06,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13846 ImplicationChecksByTransitivity, 6401.8ms TimeCoverageRelationStatistics Valid=5046, Invalid=32010, Unknown=0, NotChecked=0, Total=37056 [2021-06-05 23:09:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82258 states. [2021-06-05 23:09:06,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82258 to 42748. [2021-06-05 23:09:06,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42748 states, 42747 states have (on average 2.5865908718740496) internal successors, (110569), 42747 states have internal predecessors, (110569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42748 states to 42748 states and 110569 transitions. [2021-06-05 23:09:07,030 INFO L78 Accepts]: Start accepts. Automaton has 42748 states and 110569 transitions. Word has length 43 [2021-06-05 23:09:07,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:07,030 INFO L482 AbstractCegarLoop]: Abstraction has 42748 states and 110569 transitions. [2021-06-05 23:09:07,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:07,031 INFO L276 IsEmpty]: Start isEmpty. Operand 42748 states and 110569 transitions. [2021-06-05 23:09:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:09:07,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:07,074 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:07,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:07,275 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:07,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:07,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1888042687, now seen corresponding path program 63 times [2021-06-05 23:09:07,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:07,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48938854] [2021-06-05 23:09:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:09:07,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:07,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48938854] [2021-06-05 23:09:07,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48938854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:07,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292449619] [2021-06-05 23:09:07,487 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:07,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:09:07,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:07,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:09:07,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:07,987 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:09:07,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:09:07,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:07,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:07,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:07,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:09:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:08,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292449619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:08,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:08,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 23:09:08,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313074455] [2021-06-05 23:09:08,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:09:08,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:08,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:09:08,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:09:08,053 INFO L87 Difference]: Start difference. First operand 42748 states and 110569 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:13,979 INFO L93 Difference]: Finished difference Result 78182 states and 200986 transitions. [2021-06-05 23:09:13,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-06-05 23:09:13,979 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:09:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:14,099 INFO L225 Difference]: With dead ends: 78182 [2021-06-05 23:09:14,099 INFO L226 Difference]: Without dead ends: 77766 [2021-06-05 23:09:14,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9667 ImplicationChecksByTransitivity, 4807.1ms TimeCoverageRelationStatistics Valid=3303, Invalid=23103, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 23:09:14,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77766 states. [2021-06-05 23:09:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77766 to 43178. [2021-06-05 23:09:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43178 states, 43177 states have (on average 2.5850568589758436) internal successors, (111615), 43177 states have internal predecessors, (111615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43178 states to 43178 states and 111615 transitions. [2021-06-05 23:09:15,119 INFO L78 Accepts]: Start accepts. Automaton has 43178 states and 111615 transitions. Word has length 43 [2021-06-05 23:09:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:15,119 INFO L482 AbstractCegarLoop]: Abstraction has 43178 states and 111615 transitions. [2021-06-05 23:09:15,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:15,119 INFO L276 IsEmpty]: Start isEmpty. Operand 43178 states and 111615 transitions. [2021-06-05 23:09:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:09:15,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:15,165 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:15,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:15,387 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:15,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1766160425, now seen corresponding path program 64 times [2021-06-05 23:09:15,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:15,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422380348] [2021-06-05 23:09:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:09:15,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:15,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422380348] [2021-06-05 23:09:15,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422380348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:15,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330030801] [2021-06-05 23:09:15,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:15,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:09:15,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:15,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:09:15,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:16,314 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:09:16,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:09:16,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:16,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:16,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:16,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:09:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:16,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330030801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:16,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:16,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-06-05 23:09:16,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605943347] [2021-06-05 23:09:16,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:09:16,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:16,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:09:16,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:09:16,382 INFO L87 Difference]: Start difference. First operand 43178 states and 111615 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:21,497 INFO L93 Difference]: Finished difference Result 62543 states and 160562 transitions. [2021-06-05 23:09:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 23:09:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:09:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:21,582 INFO L225 Difference]: With dead ends: 62543 [2021-06-05 23:09:21,582 INFO L226 Difference]: Without dead ends: 62315 [2021-06-05 23:09:21,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9536 ImplicationChecksByTransitivity, 4567.2ms TimeCoverageRelationStatistics Valid=3394, Invalid=22046, Unknown=0, NotChecked=0, Total=25440 [2021-06-05 23:09:21,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62315 states. [2021-06-05 23:09:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62315 to 43786. [2021-06-05 23:09:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43786 states, 43785 states have (on average 2.582254196642686) internal successors, (113064), 43785 states have internal predecessors, (113064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:22,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43786 states to 43786 states and 113064 transitions. [2021-06-05 23:09:22,325 INFO L78 Accepts]: Start accepts. Automaton has 43786 states and 113064 transitions. Word has length 43 [2021-06-05 23:09:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:22,325 INFO L482 AbstractCegarLoop]: Abstraction has 43786 states and 113064 transitions. [2021-06-05 23:09:22,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:22,325 INFO L276 IsEmpty]: Start isEmpty. Operand 43786 states and 113064 transitions. [2021-06-05 23:09:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:09:22,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:22,368 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:22,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:22,569 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:22,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:22,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1317965889, now seen corresponding path program 65 times [2021-06-05 23:09:22,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:22,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851780291] [2021-06-05 23:09:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:22,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:22,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851780291] [2021-06-05 23:09:22,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851780291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:22,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431982904] [2021-06-05 23:09:22,859 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:22,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:09:22,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:22,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:09:22,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:23,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:09:23,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:09:23,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:09:23,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:09:23,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:09:23,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:09:23,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:09:23,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:09:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:09:23,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:09:23,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:09:23,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:09:23,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:09:23,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:09:23,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:09:23,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:09:23,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:09:23,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:23,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:23,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:23,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:10 [2021-06-05 23:09:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:23,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431982904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:23,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:23,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:09:23,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931417262] [2021-06-05 23:09:23,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:09:23,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:23,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:09:23,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:09:23,641 INFO L87 Difference]: Start difference. First operand 43786 states and 113064 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:29,168 INFO L93 Difference]: Finished difference Result 61157 states and 157678 transitions. [2021-06-05 23:09:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 23:09:29,169 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:09:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:29,254 INFO L225 Difference]: With dead ends: 61157 [2021-06-05 23:09:29,254 INFO L226 Difference]: Without dead ends: 60050 [2021-06-05 23:09:29,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6467 ImplicationChecksByTransitivity, 4333.7ms TimeCoverageRelationStatistics Valid=2723, Invalid=16737, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 23:09:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60050 states. [2021-06-05 23:09:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60050 to 44366. [2021-06-05 23:09:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44366 states, 44365 states have (on average 2.580637890228784) internal successors, (114490), 44365 states have internal predecessors, (114490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44366 states to 44366 states and 114490 transitions. [2021-06-05 23:09:29,987 INFO L78 Accepts]: Start accepts. Automaton has 44366 states and 114490 transitions. Word has length 43 [2021-06-05 23:09:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:29,987 INFO L482 AbstractCegarLoop]: Abstraction has 44366 states and 114490 transitions. [2021-06-05 23:09:29,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 44366 states and 114490 transitions. [2021-06-05 23:09:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:09:30,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:30,033 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:30,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 23:09:30,233 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:30,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1331079385, now seen corresponding path program 66 times [2021-06-05 23:09:30,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:30,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403330534] [2021-06-05 23:09:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:30,469 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 23:09:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:30,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:30,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403330534] [2021-06-05 23:09:30,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403330534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:30,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896611770] [2021-06-05 23:09:30,672 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:30,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:09:30,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:30,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:09:30,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:31,236 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:09:31,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:09:31,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:31,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:31,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:31,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:09:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:31,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896611770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:31,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:31,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:09:31,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102220240] [2021-06-05 23:09:31,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:09:31,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:31,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:09:31,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:09:31,312 INFO L87 Difference]: Start difference. First operand 44366 states and 114490 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:38,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:38,142 INFO L93 Difference]: Finished difference Result 59354 states and 152483 transitions. [2021-06-05 23:09:38,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-06-05 23:09:38,143 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:09:38,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:38,216 INFO L225 Difference]: With dead ends: 59354 [2021-06-05 23:09:38,216 INFO L226 Difference]: Without dead ends: 58884 [2021-06-05 23:09:38,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10503 ImplicationChecksByTransitivity, 5707.0ms TimeCoverageRelationStatistics Valid=4494, Invalid=24918, Unknown=0, NotChecked=0, Total=29412 [2021-06-05 23:09:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58884 states. [2021-06-05 23:09:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58884 to 44338. [2021-06-05 23:09:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44338 states, 44337 states have (on average 2.5801475065971986) internal successors, (114396), 44337 states have internal predecessors, (114396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:39,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44338 states to 44338 states and 114396 transitions. [2021-06-05 23:09:39,027 INFO L78 Accepts]: Start accepts. Automaton has 44338 states and 114396 transitions. Word has length 43 [2021-06-05 23:09:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:39,027 INFO L482 AbstractCegarLoop]: Abstraction has 44338 states and 114396 transitions. [2021-06-05 23:09:39,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:39,028 INFO L276 IsEmpty]: Start isEmpty. Operand 44338 states and 114396 transitions. [2021-06-05 23:09:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:09:39,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:39,072 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:39,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:39,272 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:39,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:39,273 INFO L82 PathProgramCache]: Analyzing trace with hash 339711487, now seen corresponding path program 67 times [2021-06-05 23:09:39,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:39,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172952371] [2021-06-05 23:09:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:39,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:39,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172952371] [2021-06-05 23:09:39,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172952371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:39,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384881169] [2021-06-05 23:09:39,561 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:39,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:09:39,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:40,292 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:09:40,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:09:40,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:40,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:40,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:40,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:09:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:40,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384881169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:40,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:40,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:09:40,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323836251] [2021-06-05 23:09:40,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:09:40,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:40,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:09:40,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:09:40,368 INFO L87 Difference]: Start difference. First operand 44338 states and 114396 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:46,180 INFO L93 Difference]: Finished difference Result 56803 states and 146198 transitions. [2021-06-05 23:09:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 23:09:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:09:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:46,256 INFO L225 Difference]: With dead ends: 56803 [2021-06-05 23:09:46,256 INFO L226 Difference]: Without dead ends: 56159 [2021-06-05 23:09:46,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7134 ImplicationChecksByTransitivity, 5042.9ms TimeCoverageRelationStatistics Valid=3364, Invalid=18392, Unknown=0, NotChecked=0, Total=21756 [2021-06-05 23:09:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56159 states. [2021-06-05 23:09:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56159 to 44676. [2021-06-05 23:09:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44676 states, 44675 states have (on average 2.5777504196978174) internal successors, (115161), 44675 states have internal predecessors, (115161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44676 states to 44676 states and 115161 transitions. [2021-06-05 23:09:47,067 INFO L78 Accepts]: Start accepts. Automaton has 44676 states and 115161 transitions. Word has length 43 [2021-06-05 23:09:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:47,067 INFO L482 AbstractCegarLoop]: Abstraction has 44676 states and 115161 transitions. [2021-06-05 23:09:47,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 44676 states and 115161 transitions. [2021-06-05 23:09:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:09:47,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:47,111 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:47,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:47,312 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash -945360627, now seen corresponding path program 68 times [2021-06-05 23:09:47,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:47,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432363483] [2021-06-05 23:09:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:47,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:47,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432363483] [2021-06-05 23:09:47,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432363483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527739339] [2021-06-05 23:09:47,592 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:47,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:09:47,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:47,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:09:47,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:48,381 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:09:48,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:09:48,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:48,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:48,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:48,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:09:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:48,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527739339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:48,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:48,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:09:48,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266203624] [2021-06-05 23:09:48,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:09:48,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:48,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:09:48,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:09:48,454 INFO L87 Difference]: Start difference. First operand 44676 states and 115161 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:53,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:53,109 INFO L93 Difference]: Finished difference Result 67792 states and 175050 transitions. [2021-06-05 23:09:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 23:09:53,110 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:09:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:53,199 INFO L225 Difference]: With dead ends: 67792 [2021-06-05 23:09:53,199 INFO L226 Difference]: Without dead ends: 66797 [2021-06-05 23:09:53,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6148 ImplicationChecksByTransitivity, 3990.2ms TimeCoverageRelationStatistics Valid=2542, Invalid=15818, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 23:09:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66797 states. [2021-06-05 23:09:53,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66797 to 47392. [2021-06-05 23:09:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47392 states, 47391 states have (on average 2.5755945221666563) internal successors, (122060), 47391 states have internal predecessors, (122060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47392 states to 47392 states and 122060 transitions. [2021-06-05 23:09:54,022 INFO L78 Accepts]: Start accepts. Automaton has 47392 states and 122060 transitions. Word has length 43 [2021-06-05 23:09:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:54,022 INFO L482 AbstractCegarLoop]: Abstraction has 47392 states and 122060 transitions. [2021-06-05 23:09:54,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 47392 states and 122060 transitions. [2021-06-05 23:09:54,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:09:54,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:54,199 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:54,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:54,401 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:54,401 INFO L82 PathProgramCache]: Analyzing trace with hash 948961809, now seen corresponding path program 69 times [2021-06-05 23:09:54,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:54,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262171643] [2021-06-05 23:09:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:54,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:54,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262171643] [2021-06-05 23:09:54,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262171643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:54,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542983995] [2021-06-05 23:09:54,652 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:54,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:09:54,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:54,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 23:09:54,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:55,214 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:09:55,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:09:55,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:55,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:55,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:55,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:09:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:55,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542983995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:55,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:55,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-06-05 23:09:55,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017926317] [2021-06-05 23:09:55,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:09:55,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:55,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:09:55,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:09:55,287 INFO L87 Difference]: Start difference. First operand 47392 states and 122060 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:02,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:02,554 INFO L93 Difference]: Finished difference Result 72464 states and 186435 transitions. [2021-06-05 23:10:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 23:10:02,554 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:10:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:02,650 INFO L225 Difference]: With dead ends: 72464 [2021-06-05 23:10:02,650 INFO L226 Difference]: Without dead ends: 71461 [2021-06-05 23:10:02,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12076 ImplicationChecksByTransitivity, 6042.3ms TimeCoverageRelationStatistics Valid=4790, Invalid=27790, Unknown=0, NotChecked=0, Total=32580 [2021-06-05 23:10:02,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71461 states. [2021-06-05 23:10:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71461 to 48146. [2021-06-05 23:10:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48146 states, 48145 states have (on average 2.5708796344376363) internal successors, (123775), 48145 states have internal predecessors, (123775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48146 states to 48146 states and 123775 transitions. [2021-06-05 23:10:03,515 INFO L78 Accepts]: Start accepts. Automaton has 48146 states and 123775 transitions. Word has length 43 [2021-06-05 23:10:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:03,516 INFO L482 AbstractCegarLoop]: Abstraction has 48146 states and 123775 transitions. [2021-06-05 23:10:03,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 48146 states and 123775 transitions. [2021-06-05 23:10:03,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:10:03,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:03,569 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:03,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 23:10:03,769 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:03,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:03,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1074030681, now seen corresponding path program 70 times [2021-06-05 23:10:03,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:03,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308634769] [2021-06-05 23:10:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:04,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:04,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308634769] [2021-06-05 23:10:04,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308634769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:04,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748327521] [2021-06-05 23:10:04,047 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:04,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:10:04,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:04,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:10:04,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:04,650 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:10:04,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:10:04,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:04,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:04,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:04,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:10:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:04,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748327521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:04,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:04,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:10:04,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304731859] [2021-06-05 23:10:04,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:10:04,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:04,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:10:04,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:10:04,721 INFO L87 Difference]: Start difference. First operand 48146 states and 123775 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:07,510 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-06-05 23:10:11,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:11,560 INFO L93 Difference]: Finished difference Result 100466 states and 258593 transitions. [2021-06-05 23:10:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-06-05 23:10:11,560 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:10:11,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:11,728 INFO L225 Difference]: With dead ends: 100466 [2021-06-05 23:10:11,728 INFO L226 Difference]: Without dead ends: 99703 [2021-06-05 23:10:11,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10642 ImplicationChecksByTransitivity, 5218.1ms TimeCoverageRelationStatistics Valid=3660, Invalid=25410, Unknown=0, NotChecked=0, Total=29070 [2021-06-05 23:10:11,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99703 states. [2021-06-05 23:10:12,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99703 to 50130. [2021-06-05 23:10:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50130 states, 50129 states have (on average 2.5679546769335118) internal successors, (128729), 50129 states have internal predecessors, (128729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50130 states to 50130 states and 128729 transitions. [2021-06-05 23:10:12,953 INFO L78 Accepts]: Start accepts. Automaton has 50130 states and 128729 transitions. Word has length 43 [2021-06-05 23:10:12,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:12,953 INFO L482 AbstractCegarLoop]: Abstraction has 50130 states and 128729 transitions. [2021-06-05 23:10:12,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:12,953 INFO L276 IsEmpty]: Start isEmpty. Operand 50130 states and 128729 transitions. [2021-06-05 23:10:13,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:10:13,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:13,005 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:13,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 23:10:13,205 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:13,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1488545191, now seen corresponding path program 71 times [2021-06-05 23:10:13,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:13,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259622392] [2021-06-05 23:10:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:13,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:13,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259622392] [2021-06-05 23:10:13,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259622392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:13,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85191409] [2021-06-05 23:10:13,456 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:13,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:10:13,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:10:13,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:14,246 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:10:14,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:10:14,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:14,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:14,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:14,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:10:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:14,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85191409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:14,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:14,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:10:14,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021973798] [2021-06-05 23:10:14,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:10:14,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:14,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:10:14,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:10:14,316 INFO L87 Difference]: Start difference. First operand 50130 states and 128729 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:15,276 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-06-05 23:10:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:23,551 INFO L93 Difference]: Finished difference Result 91246 states and 235782 transitions. [2021-06-05 23:10:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-06-05 23:10:23,551 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:10:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:23,683 INFO L225 Difference]: With dead ends: 91246 [2021-06-05 23:10:23,683 INFO L226 Difference]: Without dead ends: 90154 [2021-06-05 23:10:23,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17867 ImplicationChecksByTransitivity, 7497.6ms TimeCoverageRelationStatistics Valid=5977, Invalid=39605, Unknown=0, NotChecked=0, Total=45582 [2021-06-05 23:10:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90154 states. [2021-06-05 23:10:24,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90154 to 47190. [2021-06-05 23:10:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47190 states, 47189 states have (on average 2.5532009578503465) internal successors, (120483), 47189 states have internal predecessors, (120483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47190 states to 47190 states and 120483 transitions. [2021-06-05 23:10:24,736 INFO L78 Accepts]: Start accepts. Automaton has 47190 states and 120483 transitions. Word has length 43 [2021-06-05 23:10:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:24,736 INFO L482 AbstractCegarLoop]: Abstraction has 47190 states and 120483 transitions. [2021-06-05 23:10:24,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 47190 states and 120483 transitions. [2021-06-05 23:10:24,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:10:24,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:24,790 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:24,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:24,993 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:24,993 INFO L82 PathProgramCache]: Analyzing trace with hash -78287429, now seen corresponding path program 72 times [2021-06-05 23:10:24,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:24,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135065148] [2021-06-05 23:10:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:10:25,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:25,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135065148] [2021-06-05 23:10:25,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135065148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:25,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695457918] [2021-06-05 23:10:25,190 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:25,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:10:25,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:25,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:10:25,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:25,810 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:10:25,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:10:25,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:25,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:25,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:25,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:10:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:25,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695457918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:25,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:25,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-06-05 23:10:25,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349443538] [2021-06-05 23:10:25,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:10:25,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:25,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:10:25,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:10:25,880 INFO L87 Difference]: Start difference. First operand 47190 states and 120483 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:31,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:31,199 INFO L93 Difference]: Finished difference Result 66174 states and 167928 transitions. [2021-06-05 23:10:31,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 23:10:31,199 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:10:31,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:31,306 INFO L225 Difference]: With dead ends: 66174 [2021-06-05 23:10:31,306 INFO L226 Difference]: Without dead ends: 65870 [2021-06-05 23:10:31,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7907 ImplicationChecksByTransitivity, 4310.1ms TimeCoverageRelationStatistics Valid=3106, Invalid=18946, Unknown=0, NotChecked=0, Total=22052 [2021-06-05 23:10:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65870 states. [2021-06-05 23:10:31,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65870 to 46632. [2021-06-05 23:10:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46632 states, 46631 states have (on average 2.554995603782891) internal successors, (119142), 46631 states have internal predecessors, (119142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46632 states to 46632 states and 119142 transitions. [2021-06-05 23:10:32,044 INFO L78 Accepts]: Start accepts. Automaton has 46632 states and 119142 transitions. Word has length 43 [2021-06-05 23:10:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:32,044 INFO L482 AbstractCegarLoop]: Abstraction has 46632 states and 119142 transitions. [2021-06-05 23:10:32,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 46632 states and 119142 transitions. [2021-06-05 23:10:32,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:10:32,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:32,089 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:32,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 23:10:32,290 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:32,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:32,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1134775143, now seen corresponding path program 73 times [2021-06-05 23:10:32,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:32,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156236496] [2021-06-05 23:10:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:32,473 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-06-05 23:10:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:10:32,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:32,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156236496] [2021-06-05 23:10:32,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156236496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:32,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456942967] [2021-06-05 23:10:32,660 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:32,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:10:32,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:33,219 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:10:33,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:10:33,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:33,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:33,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:33,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:10:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:33,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456942967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:33,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:33,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:10:33,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56427601] [2021-06-05 23:10:33,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:10:33,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:33,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:10:33,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:10:33,290 INFO L87 Difference]: Start difference. First operand 46632 states and 119142 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:37,784 INFO L93 Difference]: Finished difference Result 72140 states and 184136 transitions. [2021-06-05 23:10:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 23:10:37,784 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:10:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:37,890 INFO L225 Difference]: With dead ends: 72140 [2021-06-05 23:10:37,890 INFO L226 Difference]: Without dead ends: 71943 [2021-06-05 23:10:37,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7253 ImplicationChecksByTransitivity, 3893.0ms TimeCoverageRelationStatistics Valid=2368, Invalid=17938, Unknown=0, NotChecked=0, Total=20306 [2021-06-05 23:10:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71943 states. [2021-06-05 23:10:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71943 to 47146. [2021-06-05 23:10:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47146 states, 47145 states have (on average 2.5532506098207657) internal successors, (120373), 47145 states have internal predecessors, (120373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47146 states to 47146 states and 120373 transitions. [2021-06-05 23:10:38,806 INFO L78 Accepts]: Start accepts. Automaton has 47146 states and 120373 transitions. Word has length 43 [2021-06-05 23:10:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:38,806 INFO L482 AbstractCegarLoop]: Abstraction has 47146 states and 120373 transitions. [2021-06-05 23:10:38,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 47146 states and 120373 transitions. [2021-06-05 23:10:38,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:10:38,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:38,852 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:39,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 23:10:39,052 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:39,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash 335639619, now seen corresponding path program 74 times [2021-06-05 23:10:39,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:39,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014514213] [2021-06-05 23:10:39,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:10:39,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:39,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014514213] [2021-06-05 23:10:39,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014514213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:39,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138931964] [2021-06-05 23:10:39,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:39,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:10:39,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:10:39,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:39,947 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:10:39,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:10:39,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:39,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:39,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:39,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:10:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:40,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138931964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:40,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:40,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:10:40,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669920250] [2021-06-05 23:10:40,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:10:40,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:40,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:10:40,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:10:40,015 INFO L87 Difference]: Start difference. First operand 47146 states and 120373 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:44,763 INFO L93 Difference]: Finished difference Result 74152 states and 188777 transitions. [2021-06-05 23:10:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 23:10:44,763 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:10:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:44,869 INFO L225 Difference]: With dead ends: 74152 [2021-06-05 23:10:44,870 INFO L226 Difference]: Without dead ends: 74010 [2021-06-05 23:10:44,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8025 ImplicationChecksByTransitivity, 3880.7ms TimeCoverageRelationStatistics Valid=2577, Invalid=19475, Unknown=0, NotChecked=0, Total=22052 [2021-06-05 23:10:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74010 states. [2021-06-05 23:10:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74010 to 47166. [2021-06-05 23:10:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47166 states, 47165 states have (on average 2.5532280292589844) internal successors, (120423), 47165 states have internal predecessors, (120423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47166 states to 47166 states and 120423 transitions. [2021-06-05 23:10:45,787 INFO L78 Accepts]: Start accepts. Automaton has 47166 states and 120423 transitions. Word has length 43 [2021-06-05 23:10:45,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:45,788 INFO L482 AbstractCegarLoop]: Abstraction has 47166 states and 120423 transitions. [2021-06-05 23:10:45,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 47166 states and 120423 transitions. [2021-06-05 23:10:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:10:45,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:45,839 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:46,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 23:10:46,039 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:46,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1122185933, now seen corresponding path program 75 times [2021-06-05 23:10:46,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:46,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350091251] [2021-06-05 23:10:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:10:46,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:46,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350091251] [2021-06-05 23:10:46,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350091251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:46,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672836843] [2021-06-05 23:10:46,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:46,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:10:46,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:46,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:10:46,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:46,968 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:10:46,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:10:46,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:46,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:46,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:46,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:10:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:47,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672836843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:47,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:47,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:10:47,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500135153] [2021-06-05 23:10:47,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:10:47,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:47,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:10:47,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:10:47,053 INFO L87 Difference]: Start difference. First operand 47166 states and 120423 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:51,679 INFO L93 Difference]: Finished difference Result 63023 states and 160770 transitions. [2021-06-05 23:10:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 23:10:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:10:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:51,768 INFO L225 Difference]: With dead ends: 63023 [2021-06-05 23:10:51,769 INFO L226 Difference]: Without dead ends: 62729 [2021-06-05 23:10:51,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8120 ImplicationChecksByTransitivity, 3635.8ms TimeCoverageRelationStatistics Valid=2461, Invalid=19591, Unknown=0, NotChecked=0, Total=22052 [2021-06-05 23:10:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62729 states. [2021-06-05 23:10:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62729 to 47330. [2021-06-05 23:10:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47330 states, 47329 states have (on average 2.5527900441589724) internal successors, (120821), 47329 states have internal predecessors, (120821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47330 states to 47330 states and 120821 transitions. [2021-06-05 23:10:52,601 INFO L78 Accepts]: Start accepts. Automaton has 47330 states and 120821 transitions. Word has length 43 [2021-06-05 23:10:52,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:52,601 INFO L482 AbstractCegarLoop]: Abstraction has 47330 states and 120821 transitions. [2021-06-05 23:10:52,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:52,601 INFO L276 IsEmpty]: Start isEmpty. Operand 47330 states and 120821 transitions. [2021-06-05 23:10:52,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:10:52,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:52,646 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:52,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:52,847 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:52,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:52,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1278458927, now seen corresponding path program 76 times [2021-06-05 23:10:52,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:52,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627613980] [2021-06-05 23:10:52,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:10:53,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:53,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627613980] [2021-06-05 23:10:53,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627613980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:53,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898360038] [2021-06-05 23:10:53,080 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:53,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:10:53,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:10:53,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:53,622 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:10:53,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:10:53,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:53,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:53,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:53,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:10:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:53,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898360038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:53,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:53,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:10:53,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290405830] [2021-06-05 23:10:53,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:10:53,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:53,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:10:53,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:10:53,691 INFO L87 Difference]: Start difference. First operand 47330 states and 120821 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:57,564 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-06-05 23:10:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:58,364 INFO L93 Difference]: Finished difference Result 64330 states and 163895 transitions. [2021-06-05 23:10:58,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 23:10:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:10:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:58,465 INFO L225 Difference]: With dead ends: 64330 [2021-06-05 23:10:58,465 INFO L226 Difference]: Without dead ends: 64041 [2021-06-05 23:10:58,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7628 ImplicationChecksByTransitivity, 3685.4ms TimeCoverageRelationStatistics Valid=2403, Invalid=18477, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 23:10:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64041 states. [2021-06-05 23:10:59,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64041 to 47290. [2021-06-05 23:10:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47290 states, 47289 states have (on average 2.5528346972868956) internal successors, (120721), 47289 states have internal predecessors, (120721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47290 states to 47290 states and 120721 transitions. [2021-06-05 23:10:59,494 INFO L78 Accepts]: Start accepts. Automaton has 47290 states and 120721 transitions. Word has length 43 [2021-06-05 23:10:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:59,494 INFO L482 AbstractCegarLoop]: Abstraction has 47290 states and 120721 transitions. [2021-06-05 23:10:59,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 47290 states and 120721 transitions. [2021-06-05 23:10:59,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:10:59,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:59,545 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:59,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 23:10:59,746 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:59,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:59,746 INFO L82 PathProgramCache]: Analyzing trace with hash 191955835, now seen corresponding path program 77 times [2021-06-05 23:10:59,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:59,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522974932] [2021-06-05 23:10:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:10:59,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:59,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522974932] [2021-06-05 23:10:59,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522974932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:59,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394549222] [2021-06-05 23:10:59,978 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:00,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:11:00,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:00,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:11:00,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:00,496 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-06-05 23:11:00,704 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:11:00,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:11:00,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:00,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:00,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:00,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:11:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:00,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394549222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:00,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:00,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:11:00,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298067936] [2021-06-05 23:11:00,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:11:00,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:00,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:11:00,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:11:00,773 INFO L87 Difference]: Start difference. First operand 47290 states and 120721 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:05,696 INFO L93 Difference]: Finished difference Result 65796 states and 167500 transitions. [2021-06-05 23:11:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 23:11:05,697 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:11:05,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:05,790 INFO L225 Difference]: With dead ends: 65796 [2021-06-05 23:11:05,790 INFO L226 Difference]: Without dead ends: 65562 [2021-06-05 23:11:05,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 3807.6ms TimeCoverageRelationStatistics Valid=2614, Invalid=20036, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 23:11:05,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65562 states. [2021-06-05 23:11:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65562 to 47298. [2021-06-05 23:11:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47298 states, 47297 states have (on average 2.5528257606190667) internal successors, (120741), 47297 states have internal predecessors, (120741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47298 states to 47298 states and 120741 transitions. [2021-06-05 23:11:06,696 INFO L78 Accepts]: Start accepts. Automaton has 47298 states and 120741 transitions. Word has length 43 [2021-06-05 23:11:06,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:06,696 INFO L482 AbstractCegarLoop]: Abstraction has 47298 states and 120741 transitions. [2021-06-05 23:11:06,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:06,696 INFO L276 IsEmpty]: Start isEmpty. Operand 47298 states and 120741 transitions. [2021-06-05 23:11:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:11:06,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:06,746 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:06,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 23:11:06,947 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:06,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:06,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2025140471, now seen corresponding path program 78 times [2021-06-05 23:11:06,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:06,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493699499] [2021-06-05 23:11:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:11:07,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:07,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493699499] [2021-06-05 23:11:07,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493699499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:07,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176112961] [2021-06-05 23:11:07,207 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:07,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:11:07,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:07,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:11:07,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:07,895 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:11:07,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:11:07,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:07,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:07,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:07,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:11:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:07,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176112961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:07,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:07,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:11:07,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324145545] [2021-06-05 23:11:07,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:11:07,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:07,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:11:07,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:11:07,963 INFO L87 Difference]: Start difference. First operand 47298 states and 120741 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:13,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:13,092 INFO L93 Difference]: Finished difference Result 61026 states and 155120 transitions. [2021-06-05 23:11:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 23:11:13,092 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:11:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:13,172 INFO L225 Difference]: With dead ends: 61026 [2021-06-05 23:11:13,172 INFO L226 Difference]: Without dead ends: 60852 [2021-06-05 23:11:13,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10710 ImplicationChecksByTransitivity, 4456.6ms TimeCoverageRelationStatistics Valid=3227, Invalid=24829, Unknown=0, NotChecked=0, Total=28056 [2021-06-05 23:11:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60852 states. [2021-06-05 23:11:13,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60852 to 47304. [2021-06-05 23:11:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47304 states, 47303 states have (on average 2.5528190601018963) internal successors, (120756), 47303 states have internal predecessors, (120756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47304 states to 47304 states and 120756 transitions. [2021-06-05 23:11:13,936 INFO L78 Accepts]: Start accepts. Automaton has 47304 states and 120756 transitions. Word has length 43 [2021-06-05 23:11:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:13,936 INFO L482 AbstractCegarLoop]: Abstraction has 47304 states and 120756 transitions. [2021-06-05 23:11:13,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 47304 states and 120756 transitions. [2021-06-05 23:11:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:11:13,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:13,983 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:14,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 23:11:14,183 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:14,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2141102477, now seen corresponding path program 79 times [2021-06-05 23:11:14,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:14,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718039601] [2021-06-05 23:11:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:11:14,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:14,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718039601] [2021-06-05 23:11:14,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718039601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:14,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140090536] [2021-06-05 23:11:14,445 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:14,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:11:14,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:15,114 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:11:15,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:11:15,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:15,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:15,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:15,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:11:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:15,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140090536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:15,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:15,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:11:15,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946503956] [2021-06-05 23:11:15,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:11:15,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:15,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:11:15,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:11:15,183 INFO L87 Difference]: Start difference. First operand 47304 states and 120756 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:19,419 INFO L93 Difference]: Finished difference Result 56783 states and 144456 transitions. [2021-06-05 23:11:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 23:11:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:11:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:19,503 INFO L225 Difference]: With dead ends: 56783 [2021-06-05 23:11:19,503 INFO L226 Difference]: Without dead ends: 56701 [2021-06-05 23:11:19,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7607 ImplicationChecksByTransitivity, 3643.1ms TimeCoverageRelationStatistics Valid=2455, Invalid=18137, Unknown=0, NotChecked=0, Total=20592 [2021-06-05 23:11:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56701 states. [2021-06-05 23:11:20,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56701 to 47304. [2021-06-05 23:11:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47304 states, 47303 states have (on average 2.5528190601018963) internal successors, (120756), 47303 states have internal predecessors, (120756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47304 states to 47304 states and 120756 transitions. [2021-06-05 23:11:20,434 INFO L78 Accepts]: Start accepts. Automaton has 47304 states and 120756 transitions. Word has length 43 [2021-06-05 23:11:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:20,434 INFO L482 AbstractCegarLoop]: Abstraction has 47304 states and 120756 transitions. [2021-06-05 23:11:20,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand 47304 states and 120756 transitions. [2021-06-05 23:11:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:11:20,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:20,480 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:20,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:20,681 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:20,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:20,681 INFO L82 PathProgramCache]: Analyzing trace with hash -610205491, now seen corresponding path program 80 times [2021-06-05 23:11:20,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:20,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639152855] [2021-06-05 23:11:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:11:20,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:20,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639152855] [2021-06-05 23:11:20,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639152855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:20,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663098219] [2021-06-05 23:11:20,925 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:20,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:11:20,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:20,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:11:20,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:21,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:21,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 23:11:21,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:21,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:21,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:21,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-06-05 23:11:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:21,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663098219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:21,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:21,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:11:21,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730241572] [2021-06-05 23:11:21,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:11:21,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:21,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:11:21,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:11:21,751 INFO L87 Difference]: Start difference. First operand 47304 states and 120756 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:31,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:31,424 INFO L93 Difference]: Finished difference Result 70608 states and 179724 transitions. [2021-06-05 23:11:31,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-06-05 23:11:31,425 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:11:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:31,520 INFO L225 Difference]: With dead ends: 70608 [2021-06-05 23:11:31,520 INFO L226 Difference]: Without dead ends: 69991 [2021-06-05 23:11:31,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19698 ImplicationChecksByTransitivity, 7206.0ms TimeCoverageRelationStatistics Valid=5051, Invalid=44901, Unknown=0, NotChecked=0, Total=49952 [2021-06-05 23:11:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69991 states. [2021-06-05 23:11:32,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69991 to 47428. [2021-06-05 23:11:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47428 states, 47427 states have (on average 2.5528918126805404) internal successors, (121076), 47427 states have internal predecessors, (121076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47428 states to 47428 states and 121076 transitions. [2021-06-05 23:11:32,351 INFO L78 Accepts]: Start accepts. Automaton has 47428 states and 121076 transitions. Word has length 43 [2021-06-05 23:11:32,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:32,351 INFO L482 AbstractCegarLoop]: Abstraction has 47428 states and 121076 transitions. [2021-06-05 23:11:32,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:32,351 INFO L276 IsEmpty]: Start isEmpty. Operand 47428 states and 121076 transitions. [2021-06-05 23:11:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:11:32,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:32,398 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:32,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 23:11:32,598 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:32,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:32,598 INFO L82 PathProgramCache]: Analyzing trace with hash 2146818217, now seen corresponding path program 81 times [2021-06-05 23:11:32,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:32,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742298712] [2021-06-05 23:11:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:11:32,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:32,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742298712] [2021-06-05 23:11:32,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742298712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:32,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173553663] [2021-06-05 23:11:32,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:32,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:11:32,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:32,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:11:32,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:33,483 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:11:33,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:11:33,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:33,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:33,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:33,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:11:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:33,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173553663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:33,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:33,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:11:33,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833729814] [2021-06-05 23:11:33,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:11:33,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:11:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:11:33,558 INFO L87 Difference]: Start difference. First operand 47428 states and 121076 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:41,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:41,466 INFO L93 Difference]: Finished difference Result 69796 states and 177489 transitions. [2021-06-05 23:11:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-06-05 23:11:41,467 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:11:41,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:41,562 INFO L225 Difference]: With dead ends: 69796 [2021-06-05 23:11:41,562 INFO L226 Difference]: Without dead ends: 69406 [2021-06-05 23:11:41,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21210 ImplicationChecksByTransitivity, 6720.0ms TimeCoverageRelationStatistics Valid=5217, Invalid=46995, Unknown=0, NotChecked=0, Total=52212 [2021-06-05 23:11:41,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69406 states. [2021-06-05 23:11:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69406 to 47466. [2021-06-05 23:11:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47466 states, 47465 states have (on average 2.552933740651006) internal successors, (121175), 47465 states have internal predecessors, (121175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47466 states to 47466 states and 121175 transitions. [2021-06-05 23:11:42,399 INFO L78 Accepts]: Start accepts. Automaton has 47466 states and 121175 transitions. Word has length 43 [2021-06-05 23:11:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:42,399 INFO L482 AbstractCegarLoop]: Abstraction has 47466 states and 121175 transitions. [2021-06-05 23:11:42,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 47466 states and 121175 transitions. [2021-06-05 23:11:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:11:42,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:42,448 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:42,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:42,648 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:42,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash -314964443, now seen corresponding path program 82 times [2021-06-05 23:11:42,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:42,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787894853] [2021-06-05 23:11:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:11:42,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:42,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787894853] [2021-06-05 23:11:42,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787894853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:42,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051457929] [2021-06-05 23:11:42,890 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:42,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:11:42,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:42,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:11:42,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:43,553 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:11:43,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:11:43,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:43,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:43,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:43,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:11:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:43,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051457929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:43,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:43,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:11:43,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439915936] [2021-06-05 23:11:43,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:11:43,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:43,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:11:43,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:11:43,620 INFO L87 Difference]: Start difference. First operand 47466 states and 121175 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:50,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:50,546 INFO L93 Difference]: Finished difference Result 67405 states and 171230 transitions. [2021-06-05 23:11:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-06-05 23:11:50,548 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:11:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:50,639 INFO L225 Difference]: With dead ends: 67405 [2021-06-05 23:11:50,639 INFO L226 Difference]: Without dead ends: 67187 [2021-06-05 23:11:50,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21733 ImplicationChecksByTransitivity, 5958.6ms TimeCoverageRelationStatistics Valid=5437, Invalid=46775, Unknown=0, NotChecked=0, Total=52212 [2021-06-05 23:11:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67187 states. [2021-06-05 23:11:51,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67187 to 47470. [2021-06-05 23:11:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47470 states, 47469 states have (on average 2.552887147401462) internal successors, (121183), 47469 states have internal predecessors, (121183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47470 states to 47470 states and 121183 transitions. [2021-06-05 23:11:51,552 INFO L78 Accepts]: Start accepts. Automaton has 47470 states and 121183 transitions. Word has length 43 [2021-06-05 23:11:51,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:51,552 INFO L482 AbstractCegarLoop]: Abstraction has 47470 states and 121183 transitions. [2021-06-05 23:11:51,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:51,552 INFO L276 IsEmpty]: Start isEmpty. Operand 47470 states and 121183 transitions. [2021-06-05 23:11:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:11:51,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:51,598 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:51,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:51,799 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:51,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:51,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1363490135, now seen corresponding path program 83 times [2021-06-05 23:11:51,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:51,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647210442] [2021-06-05 23:11:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:11:52,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:52,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647210442] [2021-06-05 23:11:52,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647210442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:52,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493656819] [2021-06-05 23:11:52,112 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:52,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:11:52,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:52,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:11:52,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:52,689 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:11:52,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:11:52,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:52,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:52,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:52,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:11:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:52,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493656819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:52,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:52,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:11:52,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852112851] [2021-06-05 23:11:52,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:11:52,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:52,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:11:52,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:11:52,757 INFO L87 Difference]: Start difference. First operand 47470 states and 121183 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:02,229 INFO L93 Difference]: Finished difference Result 85613 states and 217148 transitions. [2021-06-05 23:12:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2021-06-05 23:12:02,229 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:12:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:02,338 INFO L225 Difference]: With dead ends: 85613 [2021-06-05 23:12:02,338 INFO L226 Difference]: Without dead ends: 85251 [2021-06-05 23:12:02,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32674 ImplicationChecksByTransitivity, 7587.8ms TimeCoverageRelationStatistics Valid=7362, Invalid=68538, Unknown=0, NotChecked=0, Total=75900 [2021-06-05 23:12:02,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85251 states. [2021-06-05 23:12:03,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85251 to 51758. [2021-06-05 23:12:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51758 states, 51757 states have (on average 2.551461638039299) internal successors, (132056), 51757 states have internal predecessors, (132056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51758 states to 51758 states and 132056 transitions. [2021-06-05 23:12:03,504 INFO L78 Accepts]: Start accepts. Automaton has 51758 states and 132056 transitions. Word has length 43 [2021-06-05 23:12:03,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:03,505 INFO L482 AbstractCegarLoop]: Abstraction has 51758 states and 132056 transitions. [2021-06-05 23:12:03,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand 51758 states and 132056 transitions. [2021-06-05 23:12:03,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:12:03,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:03,561 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:03,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 23:12:03,772 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:03,772 INFO L82 PathProgramCache]: Analyzing trace with hash -663449007, now seen corresponding path program 84 times [2021-06-05 23:12:03,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:03,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015850936] [2021-06-05 23:12:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:12:03,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:03,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015850936] [2021-06-05 23:12:03,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015850936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:03,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701023608] [2021-06-05 23:12:03,999 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:04,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:12:04,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:04,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:12:04,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:04,567 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:12:04,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:12:04,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:04,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:04,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:04,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:12:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:04,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701023608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:04,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:04,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:12:04,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088194402] [2021-06-05 23:12:04,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:12:04,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:04,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:12:04,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:12:04,637 INFO L87 Difference]: Start difference. First operand 51758 states and 132056 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:10,965 INFO L93 Difference]: Finished difference Result 77822 states and 198068 transitions. [2021-06-05 23:12:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-05 23:12:10,965 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:12:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:11,069 INFO L225 Difference]: With dead ends: 77822 [2021-06-05 23:12:11,069 INFO L226 Difference]: Without dead ends: 77358 [2021-06-05 23:12:11,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12809 ImplicationChecksByTransitivity, 4712.4ms TimeCoverageRelationStatistics Valid=3379, Invalid=29927, Unknown=0, NotChecked=0, Total=33306 [2021-06-05 23:12:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77358 states. [2021-06-05 23:12:11,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77358 to 51884. [2021-06-05 23:12:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51884 states, 51883 states have (on average 2.5517221440548927) internal successors, (132391), 51883 states have internal predecessors, (132391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:12,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51884 states to 51884 states and 132391 transitions. [2021-06-05 23:12:12,036 INFO L78 Accepts]: Start accepts. Automaton has 51884 states and 132391 transitions. Word has length 43 [2021-06-05 23:12:12,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:12,036 INFO L482 AbstractCegarLoop]: Abstraction has 51884 states and 132391 transitions. [2021-06-05 23:12:12,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:12,036 INFO L276 IsEmpty]: Start isEmpty. Operand 51884 states and 132391 transitions. [2021-06-05 23:12:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:12:12,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:12,085 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:12,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 23:12:12,286 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:12,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:12,286 INFO L82 PathProgramCache]: Analyzing trace with hash 806965755, now seen corresponding path program 85 times [2021-06-05 23:12:12,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:12,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754414375] [2021-06-05 23:12:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:12:12,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:12,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754414375] [2021-06-05 23:12:12,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754414375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:12,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271014291] [2021-06-05 23:12:12,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:12,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:12:12,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:12,682 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-06-05 23:12:13,218 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:12:13,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:12:13,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:13,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:13,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:13,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:12:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:13,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271014291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:13,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:13,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:12:13,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157929028] [2021-06-05 23:12:13,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:12:13,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:13,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:12:13,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:12:13,287 INFO L87 Difference]: Start difference. First operand 51884 states and 132391 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:20,551 INFO L93 Difference]: Finished difference Result 75873 states and 192774 transitions. [2021-06-05 23:12:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-06-05 23:12:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:12:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:20,656 INFO L225 Difference]: With dead ends: 75873 [2021-06-05 23:12:20,656 INFO L226 Difference]: Without dead ends: 75565 [2021-06-05 23:12:20,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17790 ImplicationChecksByTransitivity, 5830.3ms TimeCoverageRelationStatistics Valid=4551, Invalid=40181, Unknown=0, NotChecked=0, Total=44732 [2021-06-05 23:12:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75565 states. [2021-06-05 23:12:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75565 to 51854. [2021-06-05 23:12:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51854 states, 51853 states have (on average 2.551250650878445) internal successors, (132290), 51853 states have internal predecessors, (132290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51854 states to 51854 states and 132290 transitions. [2021-06-05 23:12:21,692 INFO L78 Accepts]: Start accepts. Automaton has 51854 states and 132290 transitions. Word has length 43 [2021-06-05 23:12:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:21,693 INFO L482 AbstractCegarLoop]: Abstraction has 51854 states and 132290 transitions. [2021-06-05 23:12:21,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 51854 states and 132290 transitions. [2021-06-05 23:12:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:12:21,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:21,740 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:21,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:21,940 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:21,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1654816905, now seen corresponding path program 86 times [2021-06-05 23:12:21,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:21,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484954281] [2021-06-05 23:12:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:12:22,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:22,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484954281] [2021-06-05 23:12:22,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484954281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:22,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857457423] [2021-06-05 23:12:22,198 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:22,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:12:22,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:22,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:12:22,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:22,802 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:12:22,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:12:22,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:22,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:22,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:22,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:12:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:22,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857457423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:22,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:22,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:12:22,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405515875] [2021-06-05 23:12:22,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:12:22,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:22,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:12:22,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:12:22,870 INFO L87 Difference]: Start difference. First operand 51854 states and 132290 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:29,562 INFO L93 Difference]: Finished difference Result 74637 states and 189395 transitions. [2021-06-05 23:12:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-06-05 23:12:29,563 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:12:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:29,660 INFO L225 Difference]: With dead ends: 74637 [2021-06-05 23:12:29,660 INFO L226 Difference]: Without dead ends: 74393 [2021-06-05 23:12:29,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16287 ImplicationChecksByTransitivity, 5547.9ms TimeCoverageRelationStatistics Valid=4561, Invalid=36445, Unknown=0, NotChecked=0, Total=41006 [2021-06-05 23:12:29,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74393 states. [2021-06-05 23:12:30,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74393 to 51872. [2021-06-05 23:12:30,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51872 states, 51871 states have (on average 2.551232866148715) internal successors, (132335), 51871 states have internal predecessors, (132335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51872 states to 51872 states and 132335 transitions. [2021-06-05 23:12:30,581 INFO L78 Accepts]: Start accepts. Automaton has 51872 states and 132335 transitions. Word has length 43 [2021-06-05 23:12:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:30,581 INFO L482 AbstractCegarLoop]: Abstraction has 51872 states and 132335 transitions. [2021-06-05 23:12:30,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 51872 states and 132335 transitions. [2021-06-05 23:12:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:12:30,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:30,631 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:30,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:30,831 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:30,832 INFO L82 PathProgramCache]: Analyzing trace with hash -252245953, now seen corresponding path program 87 times [2021-06-05 23:12:30,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:30,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70128495] [2021-06-05 23:12:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:12:31,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:31,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70128495] [2021-06-05 23:12:31,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70128495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:31,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048848257] [2021-06-05 23:12:31,068 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:31,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:12:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:31,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:12:31,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:31,599 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:12:31,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:12:31,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:31,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:31,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:31,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:12:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:31,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048848257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:31,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:31,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:12:31,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779666502] [2021-06-05 23:12:31,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:12:31,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:31,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:12:31,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:12:31,667 INFO L87 Difference]: Start difference. First operand 51872 states and 132335 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:37,589 INFO L93 Difference]: Finished difference Result 69212 states and 175696 transitions. [2021-06-05 23:12:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-06-05 23:12:37,590 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:12:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:37,676 INFO L225 Difference]: With dead ends: 69212 [2021-06-05 23:12:37,677 INFO L226 Difference]: Without dead ends: 69130 [2021-06-05 23:12:37,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12857 ImplicationChecksByTransitivity, 4340.3ms TimeCoverageRelationStatistics Valid=3678, Invalid=28542, Unknown=0, NotChecked=0, Total=32220 [2021-06-05 23:12:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69130 states. [2021-06-05 23:12:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69130 to 51878. [2021-06-05 23:12:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51878 states, 51877 states have (on average 2.551226940648071) internal successors, (132350), 51877 states have internal predecessors, (132350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51878 states to 51878 states and 132350 transitions. [2021-06-05 23:12:38,574 INFO L78 Accepts]: Start accepts. Automaton has 51878 states and 132350 transitions. Word has length 43 [2021-06-05 23:12:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:38,574 INFO L482 AbstractCegarLoop]: Abstraction has 51878 states and 132350 transitions. [2021-06-05 23:12:38,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 51878 states and 132350 transitions. [2021-06-05 23:12:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:12:38,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:38,624 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:38,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 23:12:38,824 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:38,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:38,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1416733651, now seen corresponding path program 88 times [2021-06-05 23:12:38,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:38,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817680692] [2021-06-05 23:12:38,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:12:39,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:39,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817680692] [2021-06-05 23:12:39,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817680692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:39,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742716944] [2021-06-05 23:12:39,063 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:39,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:12:39,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:39,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:12:39,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:39,616 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:12:39,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:12:39,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:39,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:39,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:39,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:12:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:39,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742716944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:39,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:39,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:12:39,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535582688] [2021-06-05 23:12:39,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:12:39,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:39,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:12:39,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:12:39,684 INFO L87 Difference]: Start difference. First operand 51878 states and 132350 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:41,704 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-06-05 23:12:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:48,776 INFO L93 Difference]: Finished difference Result 89690 states and 227050 transitions. [2021-06-05 23:12:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-06-05 23:12:48,776 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:12:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:48,896 INFO L225 Difference]: With dead ends: 89690 [2021-06-05 23:12:48,896 INFO L226 Difference]: Without dead ends: 89290 [2021-06-05 23:12:48,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26996 ImplicationChecksByTransitivity, 7334.6ms TimeCoverageRelationStatistics Valid=6679, Invalid=58091, Unknown=0, NotChecked=0, Total=64770 [2021-06-05 23:12:48,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89290 states. [2021-06-05 23:12:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89290 to 54716. [2021-06-05 23:12:49,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54716 states, 54715 states have (on average 2.5474184410125194) internal successors, (139382), 54715 states have internal predecessors, (139382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54716 states to 54716 states and 139382 transitions. [2021-06-05 23:12:50,095 INFO L78 Accepts]: Start accepts. Automaton has 54716 states and 139382 transitions. Word has length 43 [2021-06-05 23:12:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:50,095 INFO L482 AbstractCegarLoop]: Abstraction has 54716 states and 139382 transitions. [2021-06-05 23:12:50,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 54716 states and 139382 transitions. [2021-06-05 23:12:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:12:50,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:50,158 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:50,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:50,359 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:50,359 INFO L82 PathProgramCache]: Analyzing trace with hash -368011059, now seen corresponding path program 89 times [2021-06-05 23:12:50,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:50,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257578850] [2021-06-05 23:12:50,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:12:50,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:50,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257578850] [2021-06-05 23:12:50,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257578850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:50,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752905833] [2021-06-05 23:12:50,657 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:50,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:12:50,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:50,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:12:50,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:51,255 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:12:51,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:12:51,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:51,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:51,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:51,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:12:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:51,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752905833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:51,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:51,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:12:51,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376388602] [2021-06-05 23:12:51,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:12:51,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:51,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:12:51,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:12:51,326 INFO L87 Difference]: Start difference. First operand 54716 states and 139382 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:51,634 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-06-05 23:12:56,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:56,646 INFO L93 Difference]: Finished difference Result 84710 states and 215092 transitions. [2021-06-05 23:12:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-05 23:12:56,647 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:12:56,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:56,760 INFO L225 Difference]: With dead ends: 84710 [2021-06-05 23:12:56,761 INFO L226 Difference]: Without dead ends: 84396 [2021-06-05 23:12:56,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8959 ImplicationChecksByTransitivity, 4468.1ms TimeCoverageRelationStatistics Valid=3092, Invalid=21088, Unknown=0, NotChecked=0, Total=24180 [2021-06-05 23:12:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84396 states. [2021-06-05 23:12:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84396 to 55026. [2021-06-05 23:12:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55026 states, 55025 states have (on average 2.5467878237164925) internal successors, (140137), 55025 states have internal predecessors, (140137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55026 states to 55026 states and 140137 transitions. [2021-06-05 23:12:57,850 INFO L78 Accepts]: Start accepts. Automaton has 55026 states and 140137 transitions. Word has length 43 [2021-06-05 23:12:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:57,850 INFO L482 AbstractCegarLoop]: Abstraction has 55026 states and 140137 transitions. [2021-06-05 23:12:57,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 55026 states and 140137 transitions. [2021-06-05 23:12:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:12:57,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:57,915 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:58,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:58,115 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:58,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1102403703, now seen corresponding path program 90 times [2021-06-05 23:12:58,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:58,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261494955] [2021-06-05 23:12:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:12:58,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:58,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261494955] [2021-06-05 23:12:58,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261494955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:58,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490262569] [2021-06-05 23:12:58,359 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:58,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:12:58,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:58,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:12:58,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:59,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:59,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 23:12:59,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:59,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:59,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:59,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-06-05 23:12:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:59,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490262569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:59,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:59,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:12:59,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304242763] [2021-06-05 23:12:59,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:12:59,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:59,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:12:59,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:12:59,263 INFO L87 Difference]: Start difference. First operand 55026 states and 140137 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:05,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:05,946 INFO L93 Difference]: Finished difference Result 96340 states and 244151 transitions. [2021-06-05 23:13:05,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-06-05 23:13:05,947 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:13:05,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:06,185 INFO L225 Difference]: With dead ends: 96340 [2021-06-05 23:13:06,185 INFO L226 Difference]: Without dead ends: 95949 [2021-06-05 23:13:06,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10517 ImplicationChecksByTransitivity, 5184.4ms TimeCoverageRelationStatistics Valid=3570, Invalid=24822, Unknown=0, NotChecked=0, Total=28392 [2021-06-05 23:13:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95949 states. [2021-06-05 23:13:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95949 to 54740. [2021-06-05 23:13:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54740 states, 54739 states have (on average 2.5474341876906776) internal successors, (139444), 54739 states have internal predecessors, (139444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:07,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54740 states to 54740 states and 139444 transitions. [2021-06-05 23:13:07,282 INFO L78 Accepts]: Start accepts. Automaton has 54740 states and 139444 transitions. Word has length 43 [2021-06-05 23:13:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:07,282 INFO L482 AbstractCegarLoop]: Abstraction has 54740 states and 139444 transitions. [2021-06-05 23:13:07,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 54740 states and 139444 transitions. [2021-06-05 23:13:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:13:07,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:07,348 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:07,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:07,549 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:07,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:07,549 INFO L82 PathProgramCache]: Analyzing trace with hash -72770011, now seen corresponding path program 91 times [2021-06-05 23:13:07,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:07,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700500891] [2021-06-05 23:13:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:13:07,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:07,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700500891] [2021-06-05 23:13:07,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700500891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:07,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301742587] [2021-06-05 23:13:07,794 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:07,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:13:07,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:08,507 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:13:08,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:13:08,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:08,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:08,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:08,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:13:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:08,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301742587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:08,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:08,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-06-05 23:13:08,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247430405] [2021-06-05 23:13:08,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:13:08,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:13:08,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:13:08,575 INFO L87 Difference]: Start difference. First operand 54740 states and 139444 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:09,400 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-06-05 23:13:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:14,426 INFO L93 Difference]: Finished difference Result 76775 states and 194999 transitions. [2021-06-05 23:13:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-05 23:13:14,426 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:13:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:14,528 INFO L225 Difference]: With dead ends: 76775 [2021-06-05 23:13:14,529 INFO L226 Difference]: Without dead ends: 76634 [2021-06-05 23:13:14,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10333 ImplicationChecksByTransitivity, 5161.1ms TimeCoverageRelationStatistics Valid=3895, Invalid=23495, Unknown=0, NotChecked=0, Total=27390 [2021-06-05 23:13:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76634 states. [2021-06-05 23:13:15,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76634 to 54504. [2021-06-05 23:13:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54504 states, 54503 states have (on average 2.5480248793644384) internal successors, (138875), 54503 states have internal predecessors, (138875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54504 states to 54504 states and 138875 transitions. [2021-06-05 23:13:15,581 INFO L78 Accepts]: Start accepts. Automaton has 54504 states and 138875 transitions. Word has length 43 [2021-06-05 23:13:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:15,581 INFO L482 AbstractCegarLoop]: Abstraction has 54504 states and 138875 transitions. [2021-06-05 23:13:15,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 54504 states and 138875 transitions. [2021-06-05 23:13:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:13:15,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:15,645 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:15,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 23:13:15,846 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:15,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1929336973, now seen corresponding path program 92 times [2021-06-05 23:13:15,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:15,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771924060] [2021-06-05 23:13:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:13:16,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:16,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771924060] [2021-06-05 23:13:16,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771924060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:16,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325453603] [2021-06-05 23:13:16,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:16,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:16,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:16,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:13:16,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:16,644 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:13:16,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 23:13:16,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:16,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:16,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:16,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 23:13:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:16,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325453603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:16,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:16,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-06-05 23:13:16,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113955081] [2021-06-05 23:13:16,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:13:16,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:16,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:13:16,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:13:16,736 INFO L87 Difference]: Start difference. First operand 54504 states and 138875 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:18,456 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-06-05 23:13:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:21,364 INFO L93 Difference]: Finished difference Result 67173 states and 170272 transitions. [2021-06-05 23:13:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 23:13:21,364 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:13:21,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:21,453 INFO L225 Difference]: With dead ends: 67173 [2021-06-05 23:13:21,453 INFO L226 Difference]: Without dead ends: 66985 [2021-06-05 23:13:21,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7191 ImplicationChecksByTransitivity, 4036.0ms TimeCoverageRelationStatistics Valid=2722, Invalid=17018, Unknown=0, NotChecked=0, Total=19740 [2021-06-05 23:13:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66985 states. [2021-06-05 23:13:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66985 to 54678. [2021-06-05 23:13:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54678 states, 54677 states have (on average 2.547177057995135) internal successors, (139272), 54677 states have internal predecessors, (139272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54678 states to 54678 states and 139272 transitions. [2021-06-05 23:13:22,521 INFO L78 Accepts]: Start accepts. Automaton has 54678 states and 139272 transitions. Word has length 43 [2021-06-05 23:13:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:22,521 INFO L482 AbstractCegarLoop]: Abstraction has 54678 states and 139272 transitions. [2021-06-05 23:13:22,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 54678 states and 139272 transitions. [2021-06-05 23:13:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 23:13:22,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:22,588 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:22,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:22,789 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:22,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:22,789 INFO L82 PathProgramCache]: Analyzing trace with hash -751237152, now seen corresponding path program 93 times [2021-06-05 23:13:22,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:22,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054031012] [2021-06-05 23:13:22,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:22,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:22,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054031012] [2021-06-05 23:13:22,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054031012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:22,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639238152] [2021-06-05 23:13:22,818 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:22,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:13:22,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:22,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:13:22,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:22,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639238152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:22,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:22,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 23:13:22,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535414210] [2021-06-05 23:13:22,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:13:22,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:22,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:13:22,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:13:22,903 INFO L87 Difference]: Start difference. First operand 54678 states and 139272 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:23,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:23,061 INFO L93 Difference]: Finished difference Result 55712 states and 141736 transitions. [2021-06-05 23:13:23,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:13:23,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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 46 [2021-06-05 23:13:23,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:23,136 INFO L225 Difference]: With dead ends: 55712 [2021-06-05 23:13:23,137 INFO L226 Difference]: Without dead ends: 55625 [2021-06-05 23:13:23,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:13:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55625 states. [2021-06-05 23:13:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55625 to 54869. [2021-06-05 23:13:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54869 states, 54868 states have (on average 2.547167748049865) internal successors, (139758), 54868 states have internal predecessors, (139758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54869 states to 54869 states and 139758 transitions. [2021-06-05 23:13:24,267 INFO L78 Accepts]: Start accepts. Automaton has 54869 states and 139758 transitions. Word has length 46 [2021-06-05 23:13:24,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:24,268 INFO L482 AbstractCegarLoop]: Abstraction has 54869 states and 139758 transitions. [2021-06-05 23:13:24,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:24,268 INFO L276 IsEmpty]: Start isEmpty. Operand 54869 states and 139758 transitions. [2021-06-05 23:13:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:13:24,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:24,344 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:24,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:24,544 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:24,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1620698612, now seen corresponding path program 94 times [2021-06-05 23:13:24,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:24,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585552630] [2021-06-05 23:13:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:25,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:25,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585552630] [2021-06-05 23:13:25,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585552630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:25,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237626630] [2021-06-05 23:13:25,022 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:25,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:13:25,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:13:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:26,041 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 23:13:26,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-06-05 23:13:26,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:26,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:26,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:26,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:10 [2021-06-05 23:13:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:26,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237626630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:26,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:26,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-06-05 23:13:26,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720344463] [2021-06-05 23:13:26,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 23:13:26,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:26,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 23:13:26,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:13:26,128 INFO L87 Difference]: Start difference. First operand 54869 states and 139758 transitions. Second operand has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:27,099 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-06-05 23:13:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:35,285 INFO L93 Difference]: Finished difference Result 79251 states and 201727 transitions. [2021-06-05 23:13:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-06-05 23:13:35,285 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:13:35,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:35,391 INFO L225 Difference]: With dead ends: 79251 [2021-06-05 23:13:35,391 INFO L226 Difference]: Without dead ends: 77743 [2021-06-05 23:13:35,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12439 ImplicationChecksByTransitivity, 7128.3ms TimeCoverageRelationStatistics Valid=4504, Invalid=31406, Unknown=0, NotChecked=0, Total=35910 [2021-06-05 23:13:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77743 states. [2021-06-05 23:13:36,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77743 to 55624. [2021-06-05 23:13:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55624 states, 55623 states have (on average 2.5484421911799076) internal successors, (141752), 55623 states have internal predecessors, (141752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55624 states to 55624 states and 141752 transitions. [2021-06-05 23:13:36,431 INFO L78 Accepts]: Start accepts. Automaton has 55624 states and 141752 transitions. Word has length 49 [2021-06-05 23:13:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:36,431 INFO L482 AbstractCegarLoop]: Abstraction has 55624 states and 141752 transitions. [2021-06-05 23:13:36,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:36,431 INFO L276 IsEmpty]: Start isEmpty. Operand 55624 states and 141752 transitions. [2021-06-05 23:13:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:13:36,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:36,512 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:36,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:36,735 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:36,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1861791562, now seen corresponding path program 95 times [2021-06-05 23:13:36,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:36,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824431074] [2021-06-05 23:13:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:37,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:37,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824431074] [2021-06-05 23:13:37,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824431074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:37,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137203196] [2021-06-05 23:13:37,270 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:37,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:13:37,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:13:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:38,381 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 23:13:38,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-06-05 23:13:38,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:38,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:38,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:38,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:10 [2021-06-05 23:13:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:38,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137203196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:38,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:38,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-06-05 23:13:38,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085376361] [2021-06-05 23:13:38,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 23:13:38,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:38,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 23:13:38,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2043, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:13:38,470 INFO L87 Difference]: Start difference. First operand 55624 states and 141752 transitions. Second operand has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:50,533 INFO L93 Difference]: Finished difference Result 83043 states and 211467 transitions. [2021-06-05 23:13:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-06-05 23:13:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:13:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:50,641 INFO L225 Difference]: With dead ends: 83043 [2021-06-05 23:13:50,641 INFO L226 Difference]: Without dead ends: 81631 [2021-06-05 23:13:50,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20657 ImplicationChecksByTransitivity, 9704.4ms TimeCoverageRelationStatistics Valid=6717, Invalid=48743, Unknown=0, NotChecked=0, Total=55460 [2021-06-05 23:13:50,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81631 states. [2021-06-05 23:13:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81631 to 55732. [2021-06-05 23:13:51,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55732 states, 55731 states have (on average 2.5483124293481185) internal successors, (142020), 55731 states have internal predecessors, (142020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55732 states to 55732 states and 142020 transitions. [2021-06-05 23:13:51,644 INFO L78 Accepts]: Start accepts. Automaton has 55732 states and 142020 transitions. Word has length 49 [2021-06-05 23:13:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:51,644 INFO L482 AbstractCegarLoop]: Abstraction has 55732 states and 142020 transitions. [2021-06-05 23:13:51,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 55732 states and 142020 transitions. [2021-06-05 23:13:51,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:13:51,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:51,713 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:51,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 23:13:51,913 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:51,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:51,913 INFO L82 PathProgramCache]: Analyzing trace with hash 787253712, now seen corresponding path program 96 times [2021-06-05 23:13:51,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:51,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630331178] [2021-06-05 23:13:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:52,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:52,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630331178] [2021-06-05 23:13:52,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630331178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:52,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156317893] [2021-06-05 23:13:52,321 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:52,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:13:52,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:52,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:13:52,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:53,291 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 23:13:53,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2021-06-05 23:13:53,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:53,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:53,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:53,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:10 [2021-06-05 23:13:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:53,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156317893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:53,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:53,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-06-05 23:13:53,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735441613] [2021-06-05 23:13:53,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 23:13:53,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:53,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 23:13:53,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:13:53,407 INFO L87 Difference]: Start difference. First operand 55732 states and 142020 transitions. Second operand has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 23:13:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:13:57,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-06-05 23:13:57,841 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:13:57,843 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:13:57,844 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:13:57,844 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:13:57 BasicIcfg [2021-06-05 23:13:57,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:13:57,845 INFO L168 Benchmark]: Toolchain (without parser) took 735081.38 ms. Allocated memory was 381.7 MB in the beginning and 8.4 GB in the end (delta: 8.0 GB). Free memory was 361.5 MB in the beginning and 4.6 GB in the end (delta: -4.3 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. [2021-06-05 23:13:57,845 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 381.7 MB. Free memory was 362.6 MB in the beginning and 362.6 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:13:57,845 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.69 ms. Allocated memory is still 381.7 MB. Free memory was 361.4 MB in the beginning and 360.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:13:57,845 INFO L168 Benchmark]: Boogie Preprocessor took 17.07 ms. Allocated memory is still 381.7 MB. Free memory was 360.0 MB in the beginning and 359.0 MB in the end (delta: 984.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:13:57,845 INFO L168 Benchmark]: RCFGBuilder took 248.16 ms. Allocated memory is still 381.7 MB. Free memory was 358.9 MB in the beginning and 346.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 23:13:57,845 INFO L168 Benchmark]: TraceAbstraction took 734781.70 ms. Allocated memory was 381.7 MB in the beginning and 8.4 GB in the end (delta: 8.0 GB). Free memory was 345.9 MB in the beginning and 4.6 GB in the end (delta: -4.3 GB). Peak memory consumption was 3.7 GB. Max. memory is 16.0 GB. [2021-06-05 23:13:57,845 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 381.7 MB. Free memory was 362.6 MB in the beginning and 362.6 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.69 ms. Allocated memory is still 381.7 MB. Free memory was 361.4 MB in the beginning and 360.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.07 ms. Allocated memory is still 381.7 MB. Free memory was 360.0 MB in the beginning and 359.0 MB in the end (delta: 984.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 248.16 ms. Allocated memory is still 381.7 MB. Free memory was 358.9 MB in the beginning and 346.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 734781.70 ms. Allocated memory was 381.7 MB in the beginning and 8.4 GB in the end (delta: 8.0 GB). Free memory was 345.9 MB in the beginning and 4.6 GB in the end (delta: -4.3 GB). Peak memory consumption was 3.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (55732states) and FLOYD_HOARE automaton (currently 76 states, 48 states before enhancement),while ReachableStatesComputation was computing reachable states (2709 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 734688.4ms, OverallIterations: 99, TraceHistogramMax: 5, EmptinessCheckTime: 2797.5ms, AutomataDifference: 575723.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8003 SDtfs, 60146 SDslu, 149505 SDs, 0 SdLazy, 266583 SolverSat, 27272 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 133627.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17480 GetRequests, 2572 SyntacticMatches, 44 SemanticMatches, 14864 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980418 ImplicationChecksByTransitivity, 455824.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55732occurred in iteration=98, InterpolantAutomatonStates: 11995, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48710.0ms AutomataMinimizationTime, 98 MinimizatonAttempts, 1518638 StatesRemovedByMinimization, 95 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 432.7ms SsaConstructionTime, 1771.9ms SatisfiabilityAnalysisTime, 82736.6ms InterpolantComputationTime, 7950 NumberOfCodeBlocks, 7950 NumberOfCodeBlocksAsserted, 411 NumberOfCheckSat, 7755 ConstructedInterpolants, 181 QuantifiedInterpolants, 132453 SizeOfPredicates, 725 NumberOfNonLiveVariables, 9688 ConjunctsInSsa, 2955 ConjunctsInUnsatCore, 195 InterpolantComputations, 3 PerfectInterpolantSequences, 391/7409 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown